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36\nside_to_move: black\nlegal_moves_uci: f8g7, f8e7, f8h6, f8d6, f8c5, f8b4, c8e8, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, h7h8, h7g8, h7g7, c4c7, c4c6, c4c5, c4d4, c4b4, c4c3, b6b5\nmove: c4d4\n\nposition_fen: 2r2b2/7k/1p2p1p1/3pPpPp/1P1P1P1P/8/3B1K2/2R5 b - - 0 37\nside_to_move: black\nlegal_moves_uci: f8g7, f8e7, f8h6, f8d6, f8c5, f8b4, c8e8, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, c8c4, c8c3, c8c2, c8c1, h7h8, h7g8, h7g7, b6b5\nmove: c8c1\n\nposition_fen: 8/7k/1p2p1p1/3pPpPp/1b1P1P1P/8/4K3/2B5 b - - 1 39\nside_to_move: black\nlegal_moves_uci: h7h8, h7g8, h7g7, b4f8, b4e7, b4d6, b4c5, b4a5, b4c3, b4a3, b4d2, b4e1, b6b5\nmove: b4c3\n\nposition_fen: 3r1r1k/pp2qppp/2p5/3bP1RP/8/1P2Q3/P1P2P2/1K4R1 w - - 2 26\nside_to_move: white\nlegal_moves_uci: g5g7, g5g6, g5f5, g5g4, g5g3, g5g2, e3a7, e3b6, e3c5, e3f4, e3e4, e3d4, e3h3, e3g3, e3f3, e3d3, e3c3, e3e2, e3d2, e3e1, e3c1, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, g1c1, b1b2, b1c1, b1a1, h5h6, e5e6, b3b4, f2f3, c2c3, a2a3, f2f4, c2c4, a2a4\nmove: g5g7\n\nposition_fen: 7r/5k2/2p2b2/2p2P2/2P3K1/5RN1/7P/8 b - - 8 46\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, f7g8, f7f8, f7e8, f7g7, f7e7, f6d8, f6g7, f6e7, f6g5, f6e5, f6h4, f6d4, f6c3, f6b2, f6a1\nmove: h8h4\npuzzle_id: LPIS0\nrating: 2432\nthemes: ['endgame', 'long', 'mate', 'mateIn3', 'operaMate']\nposition_index: 2\n\nposition_fen: r6R/pq1k1p2/1p2b1p1/3P1pb1/6p1/BP1Q2P1/P1B2PK1/8 w - - 5 30\nside_to_move: white\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, h8h1, d3a6, d3f5, d3b5, d3e4, d3d4, d3c4, d3f3, d3e3, d3c3, d3e2, d3d2, d3f1, d3d1, a3f8, a3e7, a3d6, a3c5, a3b4, a3b2, a3c1, g2h2, g2h1, g2g1, g2f1, c2d1, c2b1, b3b4, f2f3, f2f4\nmove: d3b5\npuzzle_id: FZqMM\nrating: 2222\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 6k1/1p1P1p2/4p1p1/P1Rp3p/1P3P2/2Q3KP/6P1/3q2b1 b - - 2 34\nside_to_move: black\nlegal_moves_uci: g8f8, g8h7, g1c5, g1d4, g1e3, g1h2, g1f2, d1g4, d1d4, d1a4, d1f3, d1d3, d1b3, d1e2, d1d2, d1c2, d1f1, d1e1, d1c1, d1b1, d1a1, f7f6, b7b6, g6g5, e6e5, h5h4, d5d4, f7f5, b7b5\nmove: h5h4\npuzzle_id: tyHzQ\nrating: 2434\nthemes: ['attraction', 'endgame', 'fork', 'mate', 'mateIn5', 'veryLong']\nposition_index: 1\n\nposition_fen: 1r3r1k/5ppB/p7/6P1/1p1p1q1Q/6N1/PPP5/1K1b4 w - - 0 31\nside_to_move: white\nlegal_moves_uci: h7g8, h7g6, h7f5, h7e4, h7d3, h4h6, h4h5, h4g4, h4f4, h4h3, h4h2, h4h1, g3h5, g3f5, g3e4, g3e2, g3h1, g3f1, b1a1, g5g6, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: h4f4\npuzzle_id: 4dQTV\nrating: 2685\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: 3k4/7r/1b4B1/8/4pnP1/8/5R2/2R3K1 b - - 15 57\nside_to_move: black\nlegal_moves_uci: d8e7, d8d7, h7h8, h7g7, h7f7, h7e7, h7d7, h7c7, h7b7, h7a7, h7h6, h7h5, h7h4, h7h3, h7h2, h7h1, b6c7, b6a7, b6c5, b6a5, b6d4, b6e3, b6f2, f4g6, f4e6, f4h5, f4d5, f4h3, f4d3, f4g2, f4e2, e4e3\nmove: f4g6\npuzzle_id: 4WNM9\nrating: 2668\nthemes: ['crushing', 'endgame', 'exposedKing', 'master', 'pin', 'veryLong']\nposition_index: 1\n\nposition_fen: 5rk1/p4p2/3Q2p1/5q1p/6P1/5P1K/7P/4R2R b - - 0 35\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8g7, f8e8, f8d8, f8c8, f8b8, f8a8, f5c8, f5d7, f5f6, f5e6, f5g5, f5e5, f5d5, f5c5, f5b5, f5a5, f5g4, f5f4, f5e4, f5f3, f5d3, f5c2, f5b1, h5g4, f7f6, a7a6, g6g5, h5h4, a7a5\nmove: f5f3\npuzzle_id: 6ziXy\nrating: 2213\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: r7/5k2/pp1p1ppp/2pP4/2P2q2/2PB3Q/P1K5/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h3c8, h3d7, h3h6, h3e6, h3h5, h3f5, h3h4, h3g4, h3g3, h3f3, h3e3, h3h2, h3g2, h3h1, h3f1, d3g6, d3f5, d3e4, d3e2, d3f1, c2b3, c2b2, c2d1, c2b1, a2a3, a2a4\nmove: h3d7\npuzzle_id: 5nfOl\nrating: 2156\nthemes: ['attraction', 'crushing', 'deflection', 'endgame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 4r1k1/rp3ppp/p7/P2N4/3P1q2/QP1np2P/2R2PP1/1N3K1R b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, a7a8, f4b8, f4c7, f4h6, f4f6, f4d6, f4g5, f4f5, f4e5, f4h4, f4g4, f4e4, f4d4, f4g3, f4f3, f4h2, f4f2, d3e5, d3c5, d3b4, d3f2, d3b2, d3e1, d3c1, e3f2, h7h6, g7g6, f7f6, b7b6, e3e2, h7h5, g7g5, f7f5, b7b5\nmove: e3e2\npuzzle_id: 3Mg46\nrating: 2418\nthemes: ['advancedPawn', 'long', 'master', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 0\n\nposition_fen: 5rk1/3Q4/2p5/3p4/6p1/1P2r2q/P6p/2RK2R1 w - - 0 36\nside_to_move: white\nlegal_moves_uci: d7e8, d7d8, d7c8, d7h7, d7g7, d7f7, d7e7, d7c7, d7b7, d7a7, d7e6, d7d6, d7c6, d7f5, d7d5, d7g4, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, d1d2, d1c2, c1c6, c1c5, c1c4, c1c3, c1c2, c1b1, c1a1, b3b4, a2a3, a2a4\nmove: g1g4\npuzzle_id: CNFx5\nrating: 1127\nthemes: ['crushing', 'endgame', 'short']\nposition_index: 0\n\nposition_fen: r4r2/5p1k/p2p4/q3nN2/1p4Q1/8/PPP5/2K2nN1 w - - 2 29\nside_to_move: white\nlegal_moves_uci: f5g7, f5e7, f5h6, f5d6, f5h4, f5d4, f5g3, f5e3, g4g8, g4g7, g4g6, g4h5, g4g5, g4h4, g4f4, g4e4, g4d4, g4c4, g4b4, g4h3, g4g3, g4f3, g4g2, g4e2, g4d1, g1h3, g1f3, g1e2, c1d1, c1b1, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: g4g7\npuzzle_id: GJCXh\nrating: 2676\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'veryLong']\nposition_index: 4\n\nposition_fen: r2r2kb/pp2pp1p/2q2npB/4p3/8/2N5/PPPQ1PPP/3R1RK1 w - - 0 15\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, h6g5, h6f4, h6e3, c3d5, c3b5, c3e4, c3a4, c3e2, c3b1, d2d8, d2d7, d2d6, d2g5, d2d5, d2f4, d2d4, d2e3, d2d3, d2e2, d2e1, d2c1, g1h1, f1e1, d1e1, d1c1, d1b1, d1a1, h2h3, g2g3, f2f3, b2b3, a2a3, h2h4, g2g4, f2f4, b2b4, a2a4\nmove: d2d8\npuzzle_id: XLka2\nrating: 640\nthemes: ['crushing', 'kingsideAttack', 'middlegame', 'short']\nposition_index: 0","sha256":"5fe8b62bf00747404914e5f51342b5c3ad42a6c63e1da5afb19a325b33eaef56","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/bfs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 6k1/pp6/2p5/3p4/3P2p1/P3P1P1/1P3K2/8 w - - 0 34\nside_to_move: white\nlegal_moves_uci: f2g2, f2e2, f2g1, f2f1, f2e1, e3e4, a3a4, b2b3, b2b4\nmove: e3e4\n\nposition_fen: 8/3r1pkp/P5p1/2b1R3/2P1P3/8/2R3PP/7K b - - 1 43\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, g7f6, d7d8, d7e7, d7c7, d7b7, d7a7, d7d6, d7d5, d7d4, d7d3, d7d2, d7d1, c5f8, c5e7, c5a7, c5d6, c5b6, c5d4, c5b4, c5e3, c5a3, c5f2, c5g1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: d7d1\n\nposition_fen: 8/8/pP6/4k3/3r3p/8/1R5K/8 w - - 1 56\nside_to_move: white\nlegal_moves_uci: h2h3, h2g2, h2h1, h2g1, b2b5, b2b4, b2b3, b2g2, b2f2, b2e2, b2d2, b2c2, b2a2, b2b1, b6b7\nmove: b6b7\n\nposition_fen: 4k3/1p2pp1R/2p5/p1qp3Q/Pn3P2/1P1PP3/1KN5/B7 b - - 0 30\nside_to_move: black\nlegal_moves_uci: e8f8, e8d8, e8d7, c5a7, c5d6, c5b6, c5b5, c5d4, c5c4, c5e3, c5c3, c5c2, b4a6, b4d3, b4c2, b4a2, e7e6, b7b6, d5d4, e7e5, b7b5\nmove: c5c2\n\nposition_fen: 3r4/5k2/8/1p2PKp1/pP1N2P1/6p1/1P4P1/8 w - - 4 33\nside_to_move: white\nlegal_moves_uci: f5g5, f5e4, d4e6, d4c6, d4b5, d4f3, d4b3, d4e2, d4c2, e5e6, b2b3\nmove: e5e6\npuzzle_id: 5eBes\nrating: 2381\nthemes: ['crushing', 'endgame', 'veryLong', 'zugzwang']\nposition_index: 0\n\nposition_fen: 5rkr/pp2q1p1/4n1Q1/3nPR1p/4N3/8/PP4PP/5R1K w - - 8 24\nside_to_move: white\nlegal_moves_uci: g6e8, g6h7, g6g7, g6f7, g6h6, g6f6, g6e6, g6h5, g6g5, g6g4, g6g3, f5f8, f5f7, f5f6, f5h5, f5g5, f5f4, f5f3, f5f2, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h1g1, f1f4, f1f3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: g6e6\npuzzle_id: 4uOji\nrating: 2195\nthemes: ['crushing', 'deflection', 'fork', 'master', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: Rn4k1/6pp/3p4/1B1Pq3/1PN1n3/7P/2P2RK1/3Q4 b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e5e8, e5e7, e5f6, e5e6, e5h5, e5g5, e5f5, e5d5, e5f4, e5d4, e5g3, e5c3, e5h2, e5b2, e5a1, e4f6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h7h6, g7g6, h7h5, g7g5\nmove: e5g3\npuzzle_id: u5Z6U\nrating: 2563\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: 8/6nk/p3p2p/1b1pNp1N/1b1P1P1P/4q3/6PK/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h5g7, h5f6, h5g3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, h2h1, g2g3, g2g4\nmove: h5f6\npuzzle_id: saT5n\nrating: 2740\nthemes: ['long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 7r/5pk1/3p1P2/1p4q1/3p4/PQ1B4/1P3p2/5K1R b - - 0 46\nside_to_move: black\nlegal_moves_uci: g7g8, g7f8, g7f6, g5f6\nmove: g7f6\npuzzle_id: xAiWS\nrating: 2314\nthemes: ['advantage', 'endgame', 'exposedKing', 'long', 'skewer']\nposition_index: 0\n\nposition_fen: 7k/p5pp/3p4/2p1p3/2P3q1/1PQ2rP1/P4n1P/2B1KR2 w - - 0 28\nside_to_move: white\nlegal_moves_uci: c3e5, c3a5, c3d4, c3b4, c3f3, c3e3, c3d3, c3d2, c3c2, c3b2, c3a1, f1f2, f1h1, f1g1, e1e2, e1d2, c1h6, c1g5, c1f4, c1e3, c1a3, c1d2, c1b2, b3b4, h2h3, a2a3, h2h4, a2a4\nmove: f1f2\npuzzle_id: KXgrS\nrating: 2165\nthemes: ['advantage', 'long', 'middlegame']\nposition_index: 2\n\nposition_fen: 6n1/1p4Pk/2p1N2P/p5K1/8/8/8/8 w - - 1 53\nside_to_move: white\nlegal_moves_uci: e6f8, e6d8, e6c7, e6c5, e6f4, e6d4, g5h5, g5f5, g5h4, g5g4, g5f4\nmove: e6f8\npuzzle_id: mZF9a\nrating: 513\nthemes: ['endgame', 'knightEndgame', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0\n\nposition_fen: 4rr2/p7/1p3k1p/2p1Rp2/6p1/P7/1P3PPP/4RK2 w - - 5 26\nside_to_move: white\nlegal_moves_uci: e5e8, e5e7, e5e6, e5f5, e5d5, e5c5, e5e4, e5e3, e5e2, f1e2, f1g1, e1e4, e1e3, e1e2, e1d1, e1c1, e1b1, e1a1, a3a4, h2h3, g2g3, f2f3, b2b3, h2h4, f2f4, b2b4\nmove: e5e8\npuzzle_id: vOxk6\nrating: 939\nthemes: ['crushing', 'endgame', 'rookEndgame', 'short']\nposition_index: 0\n\nposition_fen: 1r5k/p5p1/6Pp/Q6P/8/8/P4P2/KR1r4 b - - 2 40\nside_to_move: black\nlegal_moves_uci: h8g8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1h1, d1g1, d1f1, d1e1, d1c1, d1b1, a7a6\nmove: d1b1\npuzzle_id: TMIoF\nrating: 1117\nthemes: ['endgame', 'mate', 'mateIn2', 'queenRookEndgame', 'short']\nposition_index: 1\n\nposition_fen: 1R6/4k3/7r/2p3K1/4p3/8/8/8 w - - 0 53\nside_to_move: white\nlegal_moves_uci: b8h8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, g5h6, g5f5, g5g4, g5f4\nmove: g5h6\npuzzle_id: 0ErLd\nrating: 2296\nthemes: ['crushing', 'endgame', 'exposedKing', 'rookEndgame', 'veryLong']\nposition_index: 3\n\nposition_fen: Q2qkb1r/p2bpppp/8/1B1P4/4nB2/4PK2/PP1p1PPP/n5NR w k - 1 16\nside_to_move: white\nlegal_moves_uci: a8d8, a8c8, a8b8, a8b7, a8a7, a8c6, b5d7, b5c6, b5a6, b5c4, b5a4, b5d3, b5e2, b5f1, f4b8, f4c7, f4h6, f4d6, f4g5, f4e5, f4g3, f3e4, f3e2, g1h3, g1e2, d5d6, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: b5d7\npuzzle_id: lQxX8\nrating: 2532\nthemes: ['attraction', 'clearance', 'fork', 'mate', 'mateIn5', 'middlegame', 'pin', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: 1k6/1P6/1K6/6B1/6P1/8/8/4q3 w - - 0 56\nside_to_move: white\nlegal_moves_uci: b6c6, b6a6, b6c5, b6b5, g5d8, g5e7, g5h6, g5f6, g5h4, g5f4, g5e3, g5d2, g5c1\nmove: g5f4\npuzzle_id: Nx8za\nrating: 836\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 0","sha256":"a817fb44ac93f4d2a2a79526ca111d455ac0072c0d9e5581f89c4ef33afb7ee7","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/bfs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 6k1/5pp1/p3p2p/8/4n3/1BP5/PP2KPP1/4R2q w - - 0 35\nside_to_move: white\nlegal_moves_uci: b3e6, b3d5, b3c4, b3a4, b3c2, b3d1, e2f3, e2e3, e2d3, e2d1, e1h1, e1g1, e1f1, e1d1, e1c1, e1b1, e1a1, c3c4, g2g3, f2f3, a2a3, g2g4, f2f4, a2a4\nmove: e1h1\n\nposition_fen: 2k4r/ppp2p2/3bpq2/8/3P4/2P2Q2/PP3P1p/4RR1K b - - 0 24\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, h8h4, h8h3, c8d8, c8b8, c8d7, f6d8, f6g7, f6e7, f6h6, f6g6, f6g5, f6f5, f6e5, f6h4, f6f4, f6d4, f6f3, d6f8, d6e7, d6e5, d6c5, d6f4, d6b4, d6g3, d6a3, c7c6, b7b6, a7a6, e6e5, c7c5, b7b5, a7a5\nmove: f6f3\n\nposition_fen: 7k/ppp4p/8/4p3/4qr2/7P/1PP3R1/3Q3K w - - 2 31\nside_to_move: white\nlegal_moves_uci: h1h2, h1g1, d1d8, d1d7, d1d6, d1h5, d1d5, d1g4, d1d4, d1f3, d1d3, d1e2, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, h3h4, c2c3, b2b3, c2c4, b2b4\nmove: d1d8\n\nposition_fen: 3Q1r1k/ppp4p/8/4p3/4q3/7P/1PP3R1/7K w - - 4 32\nside_to_move: white\nlegal_moves_uci: d8f8, d8e8, d8c8, d8b8, d8a8, d8e7, d8d7, d8c7, d8f6, d8d6, d8g5, d8d5, d8h4, d8d4, d8d3, d8d2, d8d1, h1h2, h1g1, h3h4, c2c3, b2b3, c2c4, b2b4\nmove: d8f8\n\nposition_fen: r3r1k1/1p1qbppp/p1n5/2pp1N2/6N1/2PP3P/PP3PP1/R2QR1K1 b - - 6 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, a8d8, a8c8, a8b8, a8a7, e7f8, e7d8, e7f6, e7d6, e7g5, e7h4, d7d8, d7c8, d7c7, d7e6, d7d6, d7f5, c6d8, c6b8, c6a7, c6e5, c6a5, c6d4, c6b4, h7h6, g7g6, f7f6, b7b6, a6a5, d5d4, c5c4, h7h5, g7g5, b7b5\nmove: d7f5\npuzzle_id: DmJlo\nrating: 792\nthemes: ['advantage', 'hangingPiece', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: 3r1rk1/4R2p/p4bp1/1p3p2/4QPP1/8/P4q1P/3R3K w - - 0 29\nside_to_move: white\nlegal_moves_uci: e7e8, e7h7, e7g7, e7f7, e7d7, e7c7, e7b7, e7a7, e7e6, e7e5, e4a8, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4d4, e4c4, e4b4, e4a4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, e4b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, g4f5, g4g5, h2h3, a2a3, h2h4, a2a4\nmove: e4e6\npuzzle_id: 0PhbW\nrating: 2606\nthemes: ['deflection', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 7k/3n2p1/4Q2p/3p2N1/8/3q4/1P3KPP/r3B3 w - - 0 29\nside_to_move: white\nlegal_moves_uci: e6g8, e6e8, e6f7, e6e7, e6d7, e6h6, e6g6, e6f6, e6d6, e6c6, e6b6, e6a6, e6f5, e6e5, e6d5, e6g4, e6e4, e6h3, e6e3, e6e2, g5h7, g5f7, g5e4, g5h3, g5f3, f2g1, e1a5, e1b4, e1c3, e1d2, h2h3, g2g3, b2b3, h2h4, g2g4, b2b4\nmove: e6e8\npuzzle_id: vyvus\nrating: 1408\nthemes: ['endgame', 'fork', 'mate', 'mateIn2', 'short']\nposition_index: 0\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb2k/2p4P/8/2P2Q2/PP1P1PP1/RNB1K2R w KQ - 1 13\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1h4, h1h3, h1h2, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, g2g3, d2d3, b2b3, a2a3, g2g4, d2d4, b2b4, a2a4\nmove: f3e3\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 2\n\nposition_fen: 4k3/2p3R1/2p1PK2/5r2/p2P4/r7/8/B7 w - - 0 47\nside_to_move: white\nlegal_moves_uci: f6g6, f6f5\nmove: f6f5\npuzzle_id: 52eVA\nrating: 2338\nthemes: ['crushing', 'defensiveMove', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: 1r4RQ/p5r1/2n1pk1p/5p1q/2PP4/5P2/P4P1P/R6K w - - 6 31\nside_to_move: white\nlegal_moves_uci: h8h7, h8g7, h8h6, g8f8, g8e8, g8d8, g8c8, g8b8, g8g7, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, d4d5, c4c5, f3f4, h2h3, a2a3, h2h4, a2a4\nmove: h8g7\npuzzle_id: C9c6a\nrating: 2054\nthemes: ['discoveredAttack', 'discoveredCheck', 'exposedKing', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: rn3rk1/4b2p/6pB/pp1p2N1/8/P5nP/1P3PP1/R3R1K1 w - - 0 29\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, g5h7, g5f7, g5e6, g5e4, g5f3, g1h2, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, a1a2, a1d1, a1c1, a1b1, f2g3, h3h4, a3a4, f2f3, b2b3, f2f4, b2b4\nmove: e1e7\npuzzle_id: mPgSs\nrating: 2619\nthemes: ['crushing', 'discoveredAttack', 'discoveredCheck', 'kingsideAttack', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: r4rk1/ppp2pq1/3p2p1/3Np1n1/3nP1pQ/8/PPP2P2/1K3B1R w - - 4 19\nside_to_move: white\nlegal_moves_uci: d5e7, d5c7, d5f6, d5b6, d5f4, d5b4, d5e3, d5c3, h4h8, h4h7, h4h6, h4h5, h4g5, h4g4, h4h3, h4g3, h4h2, h1h3, h1h2, h1g1, f1a6, f1b5, f1c4, f1h3, f1d3, f1g2, f1e2, b1c1, b1a1, f2f3, c2c3, b2b3, a2a3, f2f4, c2c4, b2b4, a2a4\nmove: d5e7\npuzzle_id: m17EB\nrating: 1277\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 8/5pkp/2BR2p1/1pP1p3/1P5q/3QP2P/5P1K/r7 b - - 0 32\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, h4d8, h4e7, h4h6, h4f6, h4h5, h4g5, h4g4, h4f4, h4e4, h4d4, h4c4, h4b4, h4h3, h4g3, h4f2, a1a8, a1a7, a1a6, a1a5, a1a4, a1a3, a1a2, a1h1, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, h7h6, f7f6, g6g5, e5e4, h7h5, f7f5\nmove: h4f2\npuzzle_id: HNck2\nrating: 2516\nthemes: ['advantage', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb3/2p3k1/8/2P2Q2/PP1P1PPP/RNB1K2R w KQ - 0 11\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3h5, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, h2h3, g2g3, d2d3, b2b3, a2a3, h2h4, g2g4, d2d4, b2b4, a2a4\nmove: h2h4\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 0\n\nposition_fen: r5k1/3n1pbp/6p1/8/3Bq3/1P5P/P1RQ2P1/1K5R b - - 3 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, a8a6, a8a5, a8a4, a8a3, a8a2, g7h8, g7f8, g7h6, g7f6, g7e5, g7d4, d7f8, d7b8, d7f6, d7b6, d7e5, d7c5, e4e8, e4e7, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4h4, e4g4, e4f4, e4d4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: g7d4\npuzzle_id: uHEok\nrating: 1301\nthemes: ['crushing', 'discoveredAttack', 'middlegame', 'short']\nposition_index: 1","sha256":"c1131e2f29b0ce3f2914bcf8d0e0fb8e45422fb11a777fa882b0cc553d821a10","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/brs/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: r3kb1r/pp3ppp/1nP5/4p3/1n6/4P3/PP3PPP/R1BNK1NR b KQkq - 0 12\nside_to_move: black\nlegal_moves_uci: h8g8, f8e7, f8d6, f8c5, e8d8, e8e7, a8d8, a8c8, a8b8, b6c8, b6d7, b6d5, b6c4, b6a4, b4c6, b4a6, b4d5, b4d3, b4c2, b4a2, e8c8, b7c6, h7h6, g7g6, f7f6, a7a6, e5e4, h7h5, g7g5, f7f5, a7a5\nmove: b4c2\n\nposition_fen: 7r/5p1B/3p1k2/1p4q1/3p4/PQ6/1P3p2/5K1R b - - 1 47\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, f6g7, f6e7, f6e5, g5g8, g5g7, g5h6, g5g6, g5h5, g5f5, g5e5, g5d5, g5c5, g5h4, g5g4, g5f4, g5g3, g5e3, g5g2, g5d2, g5g1, g5c1, d6d5, b5b4, d4d3\nmove: g5c1\npuzzle_id: xAiWS\nrating: 2314\nthemes: ['advantage', 'endgame', 'exposedKing', 'long', 'skewer']\nposition_index: 1\n\nposition_fen: 6k1/p1p2pp1/7p/8/5P2/6P1/PPP4P/1K1Rr3 b - - 4 26\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8h7, e1e8, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1h1, e1g1, e1f1, e1d1, g7g6, f7f6, c7c6, a7a6, h6h5, g7g5, f7f5, c7c5, a7a5\nmove: e1d1\npuzzle_id: X148Z\nrating: 532\nthemes: ['backRankMate', 'endgame', 'mate', 'mateIn2', 'rookEndgame', 'short']\nposition_index: 1\n\nposition_fen: 8/5p2/3p1kp1/2pP1n1p/1pP1BP1P/pP3KP1/P7/8 b - - 4 36\nside_to_move: black\nlegal_moves_uci: f6g7, f6e7, f5g7, f5e7, f5h6, f5h4, f5d4, f5g3, f5e3, g6g5\nmove: f5d4\npuzzle_id: LqEkl\nrating: 1852\nthemes: ['crushing', 'endgame', 'short']\nposition_index: 0\n\nposition_fen: 8/8/3k4/3P2pp/pPpK2P1/P7/2P5/8 w - - 0 52\nside_to_move: white\nlegal_moves_uci: d4e4, d4c4, d4e3, d4c3, g4h5, b4b5, c2c3\nmove: g4h5\npuzzle_id: l0ncK\nrating: 2119\nthemes: ['crushing', 'endgame', 'pawnEndgame', 'quietMove', 'veryLong']\nposition_index: 4\n\nposition_fen: 4kr2/pp1q4/4p1P1/8/B2Rp3/8/PP5P/6K1 b - - 1 34\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, f8f1, e8d8, e8e7, d7c6, d7b5, d7a4, b7b6, a7a6, e6e5, e4e3, b7b5, a7a5\nmove: b7b5\npuzzle_id: MnEaG\nrating: 2482\nthemes: ['advantage', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: 3r1r2/k2p3p/1R1b4/8/2q5/3N1QP1/P1P2PKP/8 w - - 1 33\nside_to_move: white\nlegal_moves_uci: b6b8, b6b7, b6d6, b6c6, b6a6, b6b5, b6b4, b6b3, b6b2, b6b1, f3f8, f3a8, f3f7, f3b7, f3f6, f3c6, f3h5, f3f5, f3d5, f3g4, f3f4, f3e4, f3e3, f3e2, f3d1, d3e5, d3c5, d3f4, d3b4, d3b2, d3e1, d3c1, g2h3, g2h1, g2g1, g2f1, g3g4, h2h3, c2c3, a2a3, h2h4, a2a4\nmove: f3b7\npuzzle_id: VQb2g\nrating: 1402\nthemes: ['fork', 'mate', 'mateIn2', 'middlegame', 'short']\nposition_index: 1\n\nposition_fen: r1b2rk1/1p3ppp/p4b2/5P1Q/P1BP4/2q3N1/6PP/R3R1K1 w - - 0 23\nside_to_move: white\nlegal_moves_uci: h5h7, h5f7, h5h6, h5g6, h5g5, h5h4, h5g4, h5h3, h5f3, h5e2, h5d1, c4f7, c4e6, c4a6, c4d5, c4b5, c4d3, c4b3, c4e2, c4a2, c4f1, g3e4, g3e2, g3h1, g3f1, g1f2, g1h1, g1f1, e1e8, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, a1a3, a1a2, a1d1, a1c1, a1b1, d4d5, a4a5, h2h3, h2h4\nmove: h5f7\npuzzle_id: cvt1O\nrating: 1781\nthemes: ['kingsideAttack', 'mate', 'mateIn2', 'middlegame', 'pin', 'sacrifice', 'short']\nposition_index: 0\n\nposition_fen: 3k4/p3n2R/Pp2R3/2pBPp2/2Pp1P2/3q4/1P5P/2KQ2r1 b - - 3 45\nside_to_move: black\nlegal_moves_uci: d8e8, d8c8, d8d7, d8c7, e7g8, e7c8, e7g6, e7c6, e7d5, d3e4, d3c4, d3h3, d3g3, d3f3, d3e3, d3c3, d3b3, d3a3, d3e2, d3d2, d3c2, d3f1, d3d1, d3b1, g1g8, g1g7, g1g6, g1g5, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, b6b5\nmove: g1d1\npuzzle_id: ZseNv\nrating: 2536\nthemes: ['deflection', 'exposedKing', 'mate', 'mateIn5', 'middlegame', 'veryLong']\nposition_index: 4\n\nposition_fen: 8/3k4/p1p5/3R1P2/7P/3p4/6P1/6K1 b - - 0 46\nside_to_move: black\nlegal_moves_uci: d7e8, d7c8, d7e7, d7c7, c6d5\nmove: c6d5\npuzzle_id: R4904\nrating: 2043\nthemes: ['crushing', 'defensiveMove', 'endgame', 'quietMove', 'rookEndgame', 'veryLong']\nposition_index: 1\n\nposition_fen: 1rb5/p4k1q/1p2pN1P/2p2pp1/2P5/8/P1B1RPP1/6K1 w - - 2 29\nside_to_move: white\nlegal_moves_uci: f6g8, f6e8, f6h7, f6d7, f6h5, f6d5, f6g4, f6e4, e2e6, e2e5, e2e4, e2e3, e2d2, e2e1, c2f5, c2e4, c2a4, c2d3, c2b3, c2d1, c2b1, g1h2, g1h1, g1f1, g2g3, f2f3, a2a3, g2g4, f2f4, a2a4\nmove: f6h7\npuzzle_id: S96kx\nrating: 2390\nthemes: ['advantage', 'attraction', 'exposedKing', 'fork', 'master', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 4\n\nposition_fen: r6r/2p2kp1/p2p4/1p2p2p/3nPq2/3P1b2/PPPN2K1/R1BQ2R1 w - - 0 19\nside_to_move: white\nlegal_moves_uci: g2h3, g2f2, g2f1, d2f3, d1f3\nmove: d2f3\npuzzle_id: R63lc\nrating: 1253\nthemes: ['advantage', 'defensiveMove', 'middlegame', 'short']\nposition_index: 0\n\nposition_fen: 6k1/1RR3pp/2P5/6bK/8/7P/5P2/6r1 b - - 2 45\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g5d8, g5e7, g5h6, g5f6, g5h4, g5f4, g5e3, g5d2, g5c1, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, g1c1, g1b1, g1a1, h7h6, g7g6\nmove: g7g6\npuzzle_id: qyyQh\nrating: 2110\nthemes: ['endgame', 'mate', 'mateIn5', 'sacrifice', 'veryLong']\nposition_index: 4\n\nposition_fen: 8/6pp/8/8/Ppk1p3/6P1/3K1P1P/8 b - - 1 50\nside_to_move: black\nlegal_moves_uci: c4d5, c4c5, c4d4, c4b3, h7h6, g7g6, e4e3, b4b3, h7h5, g7g5\nmove: c4c5\npuzzle_id: fdZ8U\nrating: 2773\nthemes: ['crushing', 'defensiveMove', 'deflection', 'endgame', 'master', 'pawnEndgame', 'veryLong']\nposition_index: 2\n\nposition_fen: r1b2rk1/2p1npp1/2p4p/1pq1P1NQ/p7/R1PBP3/5PPP/3R2K1 w - - 2 25\nside_to_move: white\nlegal_moves_uci: h5f7, h5h6, h5g6, h5h4, h5g4, h5h3, h5f3, h5e2, g5h7, g5f7, g5e6, g5e4, g5h3, g5f3, d3h7, d3g6, d3f5, d3b5, d3e4, d3c4, d3e2, d3c2, d3f1, d3b1, a3a4, a3b3, a3a2, a3a1, g1h1, g1f1, d1d2, d1f1, d1e1, d1c1, d1b1, d1a1, e5e6, e3e4, c3c4, h2h3, g2g3, f2f3, h2h4, g2g4, f2f4\nmove: h5f7\npuzzle_id: 72g6J\nrating: 2396\nthemes: ['kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: 2k1r3/p1p2p1p/2p5/7q/2P5/b5Q1/PBPP1P1P/R1K2B2 b - - 2 20\nside_to_move: black\nlegal_moves_uci: e8h8, e8g8, e8f8, e8d8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, c8d8, c8b8, c8d7, c8b7, h5h6, h5g6, h5g5, h5f5, h5e5, h5d5, h5c5, h5b5, h5a5, h5h4, h5g4, h5h3, h5f3, h5h2, h5e2, h5d1, a3f8, a3e7, a3d6, a3c5, a3b4, a3b2, h7h6, f7f6, a7a6, c6c5, f7f5, a7a5\nmove: e8e1\npuzzle_id: SMz1z\nrating: 1822\nthemes: ['mate', 'mateIn2', 'middlegame', 'queensideAttack', 'short']\nposition_index: 1","sha256":"69fca390500b1ded8906b0297694ed6750a828d08274ff72eaffd1ece0fd205b","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/brs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 2Q3k1/5pp1/7p/8/1P4q1/P7/1K1R4/8 b - - 0 39\nside_to_move: black\nlegal_moves_uci: g8h7, g4c8\nmove: g4c8\n\nposition_fen: 1r3k2/p3r3/2n1p2p/4Qp1q/2PP4/5P2/P4P1P/R5RK w - - 0 28\nside_to_move: white\nlegal_moves_uci: e5h8, e5b8, e5g7, e5c7, e5f6, e5e6, e5d6, e5f5, e5d5, e5c5, e5b5, e5a5, e5f4, e5e4, e5g3, e5e3, e5e2, e5e1, h1g2, g1g8, g1g7, g1g6, g1g5, g1g4, g1g3, g1g2, g1f1, g1e1, g1d1, g1c1, g1b1, a1f1, a1e1, a1d1, a1c1, a1b1, d4d5, c4c5, f3f4, h2h3, a2a3, h2h4, a2a4\nmove: e5h8\n\nposition_fen: 2krr3/ppp3p1/2n2pB1/3q2Pp/5P1P/bP3N2/P1P2Q2/1K1R3R b - - 0 22\nside_to_move: black\nlegal_moves_uci: e8h8, e8g8, e8f8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, d8d7, d8d6, c8b8, c8d7, c6b8, c6e7, c6e5, c6a5, c6d4, c6b4, d5g8, d5f7, d5d7, d5e6, d5d6, d5g5, d5f5, d5e5, d5c5, d5b5, d5a5, d5e4, d5d4, d5c4, d5f3, d5d3, d5b3, d5d2, d5d1, a3f8, a3e7, a3d6, a3c5, a3b4, a3b2, a3c1, f6g5, b7b6, a7a6, f6f5, b7b5, a7a5\nmove: d5d1\npuzzle_id: bIJLK\nrating: 896\nthemes: ['mate', 'mateIn2', 'middlegame', 'pillsburysMate', 'queensideAttack', 'short']\nposition_index: 0\n\nposition_fen: 8/pp6/2p1k3/1P1p2p1/2PP2Pp/3K3P/P7/8 b - - 0 36\nside_to_move: black\nlegal_moves_uci: e6f7, e6e7, e6d7, e6f6, e6d6, c6b5, d5c4, b7b6, a7a6, c6c5, a7a5\nmove: d5c4\npuzzle_id: E4Dcg\nrating: 2420\nthemes: ['attraction', 'crushing', 'endgame', 'pawnEndgame', 'quietMove', 'veryLong']\nposition_index: 0\n\nposition_fen: 2r4k/3bR1R1/p3p2P/1p6/8/P2r4/1P6/2K5 w - - 2 36\nside_to_move: white\nlegal_moves_uci: c1b1\nmove: c1b1\npuzzle_id: gWGN4\nrating: 2066\nthemes: ['crushing', 'endgame', 'quietMove', 'veryLong']\nposition_index: 1\n\nposition_fen: 6r1/R4Qpk/1p2B1p1/4q3/7n/7P/5PP1/2rR2K1 b - - 2 34\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8e8, g8d8, g8c8, g8b8, g8a8, h7h8, h7h6, e5b8, e5c7, e5f6, e5e6, e5d6, e5h5, e5g5, e5f5, e5d5, e5c5, e5b5, e5a5, e5f4, e5e4, e5d4, e5g3, e5e3, e5c3, e5h2, e5e2, e5b2, e5e1, e5a1, h4f5, h4f3, h4g2, c1c8, c1c7, c1c6, c1c5, c1c4, c1c3, c1c2, c1d1, c1b1, c1a1, g6g5, b6b5\nmove: c1d1\npuzzle_id: mPZrZ\nrating: 1134\nthemes: ['mate', 'mateIn2', 'middlegame', 'short']\nposition_index: 1\n\nposition_fen: 8/7P/8/8/4b3/2ppk2R/4p3/4K3 b - - 3 51\nside_to_move: black\nlegal_moves_uci: e3f4, e3d4, e4f3\nmove: e4f3\npuzzle_id: zckUH\nrating: 2086\nthemes: ['advancedPawn', 'endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 2\n\nposition_fen: 5R1r/pp4p1/4q2k/3nP1Np/8/8/PP4PP/5R1K w - - 3 27\nside_to_move: white\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, g5h7, g5f7, g5e6, g5e4, g5h3, g5f3, h1g1, f1f7, f1f6, f1f5, f1f4, f1f3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: g5e6\npuzzle_id: 4uOji\nrating: 2195\nthemes: ['crushing', 'deflection', 'fork', 'master', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: r4b1r/p5p1/1Rn5/k3p2p/4NB2/8/2P2P2/q4BK1 w - - 0 24\nside_to_move: white\nlegal_moves_uci: b6b8, b6b7, b6c6, b6a6, b6b5, b6b4, b6b3, b6b2, b6b1, f4h6, f4g5, f4e5, f4g3, f4e3, f4h2, f4d2, f4c1, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4d2, g1h2, g1g2, g1h1, f2f3, c2c3, c2c4\nmove: b6a6\npuzzle_id: QNwRO\nrating: 2683\nthemes: ['discoveredCheck', 'doubleCheck', 'fork', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: 8/6rk/1pn4b/p2p1P2/P1pP1qN1/2P4P/1P6/4R2K w - - 0 36\nside_to_move: white\nlegal_moves_uci: g4h6, g4f6, g4e5, g4e3, g4h2, g4f2, h1g2, h1g1, e1e8, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1g1, e1f1, e1d1, e1c1, e1b1, e1a1, f5f6, h3h4, b2b3, b2b4\nmove: g4f6\npuzzle_id: JlPo2\nrating: 2165\nthemes: ['arabianMate', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 2r1r1k1/5pp1/4bn1p/3pq3/3npP2/PPBP3P/B5P1/2RQNRK1 b - f3 0 23\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8h7, e8f8, e8d8, e8e7, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, c8c4, c8c3, f6h7, f6d7, f6h5, f6g4, e6d7, e6f5, e6g4, e6h3, e5b8, e5c7, e5d6, e5h5, e5g5, e5f5, e5f4, d4c6, d4f5, d4b5, d4f3, d4b3, d4e2, d4c2, e4d3, g7g6, h6h5, e4e3, g7g5, e4f3\nmove: e4f3\npuzzle_id: 1qa15\nrating: 1854\nthemes: ['crushing', 'enPassant', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 4r3/p4pk1/1p4p1/2pPr1P1/2P1BR1P/1P6/P1nK4/4R3 b - - 8 38\nside_to_move: black\nlegal_moves_uci: e8h8, e8g8, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, g7h8, g7g8, g7f8, g7h7, e5e7, e5e6, e5g5, e5f5, e5d5, e5e4, c2d4, c2b4, c2e3, c2a3, c2e1, c2a1, f7f6, a7a6, b6b5, f7f5, a7a5\nmove: c2e1\npuzzle_id: J3kos\nrating: 991\nthemes: ['crushing', 'endgame', 'master', 'pin', 'short']\nposition_index: 1\n\nposition_fen: 6k1/p1p2pp1/7p/8/5P2/6P1/PPP4P/1K1Rr3 b - - 4 26\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8h7, e1e8, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1h1, e1g1, e1f1, e1d1, g7g6, f7f6, c7c6, a7a6, h6h5, g7g5, f7f5, c7c5, a7a5\nmove: e1d1\npuzzle_id: X148Z\nrating: 532\nthemes: ['backRankMate', 'endgame', 'mate', 'mateIn2', 'rookEndgame', 'short']\nposition_index: 1\n\nposition_fen: 2k4r/ppp2p2/3bpq2/8/3P4/2P2Q2/PP3P1p/4RR1K b - - 0 24\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, h8h4, h8h3, c8d8, c8b8, c8d7, f6d8, f6g7, f6e7, f6h6, f6g6, f6g5, f6f5, f6e5, f6h4, f6f4, f6d4, f6f3, d6f8, d6e7, d6e5, d6c5, d6f4, d6b4, d6g3, d6a3, c7c6, b7b6, a7a6, e6e5, c7c5, b7b5, a7a5\nmove: f6f3\npuzzle_id: e5nms\nrating: 473\nthemes: ['endgame', 'hangingPiece', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0\n\nposition_fen: 2R5/4Kp2/5Nkp/3pp3/3P2P1/4rn2/8/8 w - - 2 54\nside_to_move: white\nlegal_moves_uci: c8h8, c8g8, c8f8, c8e8, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, c8c4, c8c3, c8c2, c8c1, e7f8, e7e8, e7d8, e7d7, e7d6, f6g8, f6e8, f6h7, f6d7, f6h5, f6d5, f6e4, d4e5, g4g5\nmove: c8g8\npuzzle_id: 19jqO\nrating: 2569\nthemes: ['endgame', 'mate', 'mateIn4', 'veryLong']\nposition_index: 3\n\nposition_fen: r3r1k1/pp3ppp/2nb4/6Q1/P6B/2P2B1P/5PP1/4R1K1 b - - 0 21\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, a8d8, a8c8, a8b8, d6f8, d6b8, d6e7, d6c7, d6e5, d6c5, d6f4, d6b4, d6g3, d6a3, d6h2, c6d8, c6b8, c6e7, c6e5, c6a5, c6d4, c6b4, h7h6, g7g6, f7f6, b7b6, a7a6, h7h5, f7f5, b7b5, a7a5\nmove: e8e1\npuzzle_id: 0BFEw\nrating: 636\nthemes: ['kingsideAttack', 'mate', 'mateIn2', 'middlegame', 'pillsburysMate', 'short']\nposition_index: 1","sha256":"4be91ecfc6edcd7cd5098ec5fea169ab2064529e3c3422aa27b7e37b06c2d4fb","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/brs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 3r4/6kp/4p3/1p6/8/1BP4q/PP4Q1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: g7h8, g7f8, g7f7, g7h6, g7f6, h3g4, h3g3, h3g2\nmove: h3g2\n\nposition_fen: 3Qqk2/5p1p/b5pP/p2pP3/1r1r2P1/5R2/5PK1/8 w - - 2 39\nside_to_move: white\nlegal_moves_uci: d8e8, d8c8, d8b8, d8a8, d8e7, d8d7, d8c7, d8f6, d8d6, d8b6, d8g5, d8d5, d8a5, d8h4, f3f7, f3f6, f3f5, f3f4, f3h3, f3g3, f3e3, f3d3, f3c3, f3b3, f3a3, g2h3, g2g3, g2h2, g2h1, g2g1, e5e6, g4g5\nmove: f3f7\npuzzle_id: AF0Pt\nrating: 2103\nthemes: ['attraction', 'endgame', 'fork', 'mate', 'mateIn4', 'pin', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 2Q5/2Bp1p1p/4p3/p1kp4/Pn3P2/1P6/3KR2P/1q3r2 w - - 17 31\nside_to_move: white\nlegal_moves_uci: c8h8, c8g8, c8f8, c8e8, c8d8, c8b8, c8a8, c8d7, c8b7, c8a6, c7d8, c7b8, c7d6, c7b6, c7e5, c7a5, e2e6, e2e5, e2e4, e2e3, e2g2, e2f2, e2e1, d2e3, d2c3, f4f5, h2h3, h2h4\nmove: c8f8\npuzzle_id: EHyEK\nrating: 2595\nthemes: ['endgame', 'mate', 'mateIn4', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/1pR5/p5kp/6p1/b7/5P1P/r1nR2PK/8 w - - 2 36\nside_to_move: white\nlegal_moves_uci: c7c8, c7h7, c7g7, c7f7, c7e7, c7d7, c7b7, c7c6, c7c5, c7c4, c7c3, c7c2, h2g3, h2h1, h2g1, d2d8, d2d7, d2d6, d2d5, d2d4, d2d3, d2f2, d2e2, d2c2, d2d1, h3h4, f3f4, g2g3, g2g4\nmove: d2d6\npuzzle_id: tUyWO\nrating: 2735\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 0\n\nposition_fen: 3r2k1/6Rp/4p3/1p6/8/1BP4q/PP4b1/5QK1 b - - 0 29\nside_to_move: black\nlegal_moves_uci: g8h8, g8g7\nmove: g8g7\npuzzle_id: TGkEy\nrating: 2191\nthemes: ['crushing', 'endgame', 'pin', 'veryLong']\nposition_index: 2\n\nposition_fen: 5r1r/ppqb2Q1/2nkp3/3nN3/3P4/P1B5/1P3PPP/R4RK1 w - - 5 20\nside_to_move: white\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h7, g7f7, g7e7, g7d7, g7h6, g7g6, g7f6, g7g5, g7g4, g7g3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, c3a5, c3b4, c3d2, c3e1, g1h1, f1e1, f1d1, f1c1, f1b1, a1a2, a1e1, a1d1, a1c1, a1b1, a3a4, h2h3, g2g3, f2f3, b2b3, h2h4, g2g4, f2f4, b2b4\nmove: e5c4\npuzzle_id: uGdbu\nrating: 1795\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: r1bq1r2/pp1n1pp1/2pQ4/8/3R2Pk/8/PPP5/2K5 w - - 0 26\nside_to_move: white\nlegal_moves_uci: d6f8, d6b8, d6e7, d6d7, d6c7, d6h6, d6g6, d6f6, d6e6, d6c6, d6e5, d6d5, d6c5, d6f4, d6b4, d6g3, d6a3, d6h2, d4d5, d4f4, d4e4, d4c4, d4b4, d4a4, d4d3, d4d2, d4d1, c1d2, c1d1, c1b1, g4g5, c2c3, b2b3, a2a3, c2c4, b2b4, a2a4\nmove: d6h2\npuzzle_id: Exzx9\nrating: 2701\nthemes: ['mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: r3r1k1/3q1p1n/p6Q/2p1p3/3b2P1/4B1P1/PP3PK1/7R w - - 0 32\nside_to_move: white\nlegal_moves_uci: h6f8, h6h7, h6g7, h6g6, h6f6, h6e6, h6d6, h6c6, h6b6, h6a6, h6h5, h6g5, h6h4, h6f4, h6h3, h6h2, e3g5, e3f4, e3d4, e3d2, e3c1, g2h3, g2f3, g2h2, g2g1, g2f1, h1h5, h1h4, h1h3, h1h2, h1g1, h1f1, h1e1, h1d1, h1c1, h1b1, h1a1, g4g5, f2f3, b2b3, a2a3, f2f4, b2b4, a2a4\nmove: h6h7\npuzzle_id: wUTyK\nrating: 2707\nthemes: ['dovetailMate', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/p4bk1/5p1p/P4p2/B3pN2/P7/2P2PPP/1r1R2K1 b - - 3 25\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h7, f7g8, f7e8, f7g6, f7e6, f7h5, f7d5, f7c4, f7b3, f7a2, b1b8, b1b7, b1b6, b1b5, b1b4, b1b3, b1b2, b1d1, b1c1, b1a1, a7a6, h6h5, e4e3\nmove: b1d1\npuzzle_id: fXffx\nrating: 448\nthemes: ['backRankMate', 'endgame', 'mate', 'mateIn2', 'short']\nposition_index: 1\n\nposition_fen: 8/r2k4/8/PK3p2/8/8/8/R7 w - - 9 53\nside_to_move: white\nlegal_moves_uci: b5b6, b5c5, b5c4, b5b4, b5a4, a1a4, a1a3, a1a2, a1h1, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, a5a6\nmove: b5b6\npuzzle_id: szH7t\nrating: 2615\nthemes: ['clearance', 'crushing', 'defensiveMove', 'endgame', 'rookEndgame', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/8/8/7P/5p2/8/4K1kP/8 b - - 0 52\nside_to_move: black\nlegal_moves_uci: g2h3, g2h2, g2h1, g2g1, f4f3\nmove: f4f3\npuzzle_id: ulmPp\nrating: 2799\nthemes: ['advancedPawn', 'crushing', 'endgame', 'exposedKing', 'pawnEndgame', 'quietMove', 'veryLong', 'zugzwang']\nposition_index: 3\n\nposition_fen: rn1qkb1r/pp2pppp/2p2n2/3p1b2/3P1B2/3BP3/PPP2PPP/RN1QK1NR w KQkq - 0 5\nside_to_move: white\nlegal_moves_uci: f4b8, f4c7, f4h6, f4d6, f4g5, f4e5, f4g3, d3a6, d3f5, d3b5, d3e4, d3c4, d3e2, d3f1, g1h3, g1f3, g1e2, e1e2, e1d2, e1f1, d1h5, d1g4, d1f3, d1e2, d1d2, d1c1, b1c3, b1a3, b1d2, e3e4, h2h3, g2g3, f2f3, c2c3, b2b3, a2a3, h2h4, g2g4, c2c4, b2b4, a2a4\nmove: d3f5\npuzzle_id: c8OsF\nrating: 895\nthemes: ['advantage', 'hangingPiece', 'oneMove', 'opening']\nposition_index: 0\n\nposition_fen: r4rk1/pp2q1p1/3b3P/4n3/8/PP5Q/1BPN1P2/R4K1R b - - 0 23\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8f7, f8e8, f8d8, f8c8, f8b8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, a8e8, a8d8, a8c8, a8b8, e7e8, e7d8, e7f7, e7d7, e7c7, e7f6, e7e6, e7g5, e7h4, d6b8, d6c7, d6c5, d6b4, d6a3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, g7h6, g7g6, b7b6, a7a6, g7g5, b7b5, a7a5\nmove: f8f2\npuzzle_id: y7SzX\nrating: 2278\nthemes: ['advantage', 'attraction', 'discoveredAttack', 'discoveredCheck', 'fork', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: 2k4r/1p2bpp1/pP1p2p1/2pPP3/5P2/2N2QK1/1P4R1/R1B2q2 b - - 0 24\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, h8h1, c8d8, c8b8, c8d7, e7f8, e7d8, e7f6, e7g5, e7h4, f1b5, f1c4, f1f3, f1d3, f1g2, f1f2, f1e2, f1h1, f1g1, f1e1, f1d1, f1c1, d6e5, f7f6, g6g5, a6a5, c5c4, f7f5\nmove: h8h3\npuzzle_id: b4yqE\nrating: 2626\nthemes: ['attraction', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 0\n\nposition_fen: 5krr/ppQb4/3P4/5q2/7p/2P5/PP5p/K5R1 w - - 0 37\nside_to_move: white\nlegal_moves_uci: c7d8, c7c8, c7b8, c7d7, c7b7, c7c6, c7b6, c7c5, c7a5, c7c4, g1g8, g1g7, g1g6, g1g5, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, g1c1, g1b1, c3c4, b2b3, a2a3, b2b4, a2a4\nmove: c7d8\npuzzle_id: xAoXK\nrating: 2578\nthemes: ['exposedKing', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: r2r2k1/ppp2p1p/5p2/5Q2/8/5P2/PPP3PP/1K1R1B1R b - - 0 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8g7, d8f8, d8e8, d8c8, d8b8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, a8c8, a8b8, h7h6, c7c6, b7b6, a7a6, h7h5, c7c5, b7b5, a7a5\nmove: d8d1\npuzzle_id: 33foZ\nrating: 512\nthemes: ['backRankMate', 'endgame', 'hangingPiece', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0","sha256":"f1633b260f4ba6844181ed38d5debbd242d0bff890f260a2cbea8cac6da54512","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/copro/42":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"521d5358deff32208af5c4b826a1f4d6547cba8f9896f2c97bcb0ba9621b3aaf","unchanged":true,"condition_no_update":true,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/copro/43":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"521d5358deff32208af5c4b826a1f4d6547cba8f9896f2c97bcb0ba9621b3aaf","unchanged":true,"condition_no_update":true,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/copro/44":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"521d5358deff32208af5c4b826a1f4d6547cba8f9896f2c97bcb0ba9621b3aaf","unchanged":true,"condition_no_update":true,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/gepa/42":{"text":"You are an expert chess engine and master tactician. Your task is to solve a chess puzzle by finding the single best move for the active side.\n\n### Inputs\n1. **`position_fen`**: The current board state represented in Forsyth-Edwards Notation (FEN).\n2. **`side_to_move`**: The color of the player who must make a move (\"white\" or \"black\").\n3. **`legal_moves_uci`**: A list of all valid legal moves for the active side, formatted in Universal Chess Interface (UCI) notation (e.g., `e2e4`, `g1f3`, `h3h8`).\n\n---\n\n### Strict Tactical & Calculation Methodology\nTo find the correct solution and avoid common tactical blunders, you must systematically process the board state using this rigorous step-by-step methodology:\n\n#### 1. Identify Opponent Threats & \"Hanging\" Pieces\n*   **Identify Checks and Mates**: Does your opponent threaten an immediate checkmate (e.g., a back-rank mate or a battery)? If so, your move must either be a forcing counter-attack (continuous checks leading to mate/major win) or a direct, active defense.\n*   **Locate Loose/Hanging Pieces**: Look for undefended or high-value opponent pieces that can be captured safely. If an opponent's piece is actively threatening you and can be captured for free, prioritize calculating this capture over speculative moves.\n\n#### 2. The Check-Calculation Protocol (Calculate to Refutation)\nDo not play a check simply because it is legal. For **every** legal check available:\n*   Identify all of the opponent's legal responses (capturing your checking piece, blocking the check, or moving the king).\n*   **The Safety Check**: If the opponent can simply capture your checking piece with their king or another defender for *no compensation*, **discard that move immediately**. (e.g., do not play a queen or bishop check that can be trivially captured by the king or a defender unless it initiates a forced, winning sequence).\n*   Compare all safe checks. Look for checks that force the king into a mating net, exploit a weak back rank (e.g., forcing a rook/queen infiltration), or win massive material.\n\n#### 3. Calculate Two-Ply Deep (My Move -> Opponent's Best Reply)\nFor your top 3 candidate moves, you must visualize the board state *after* your move is played and identify the opponent's single strongest reply. \n*   If their reply is a simple capture of your piece, a devastating counter-check, or an easy escape from your tactic, **discard your candidate move** and calculate the next one.\n*   Look for common tactical motifs: **Back-rank weaknesses**, **rook infiltration on the 7th/2nd rank**, **discovered attacks**, and **deflection sacrifices**.\n\n#### 4. Avoid the \"Suicide Check\" Bias\n*   *Do not* automatically play a check or a pawn promotion if a simpler, winning capture or a more forcing check exists. \n*   Always verify if capturing an active, threatening enemy piece (e.g., a rook threatening a back-rank mate) is superior to giving a desperate check that blunders your own piece.\n\n---\n\n### Output Constraints\n- You must output **ONLY** the single best move. Do not include any analysis, thoughts, introduction, or explanations.\n- The move **must** be written in **UCI format** (e.g., `c8c1`, `e6h3`, `a1a7`). Do not use Standard Algebraic Notation (SAN) like `Qxh3` or `Ra7+`.\n- The move must be selected **exactly** as it is formatted in the provided `legal_moves_uci` list.","sha256":"8423de08a268fe71213ab8a980df168412d3f4ab6292e87cfcf1b39447595580","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/gepa/43":{"text":"# Role and Goal\nYou are a World-Class Chess Engine (equivalent to Stockfish) and an expert Grandmaster tactical puzzle solver. Your task is to analyze the given chess position and select the single best move from the provided list of legal moves that solves the tactical puzzle. This move must lead to a forced checkmate, a forced win of decisive material, or a mathematically won endgame.\n\n# Input Description\nYou will be provided with three inputs:\n1. `position_fen`: The current board state represented in Forsyth-Edwards Notation (FEN).\n2. `side_to_move`: The player whose turn it is to move (\"white\" or \"black\").\n3. `legal_moves_uci`: A list of all legal moves available for the current player in Universal Chess Interface (UCI) format (e.g., `e2e4`, `g3f2`).\n\n# Tactical Search & Calculation Protocol\nTo avoid critical tactical blunders (such as hanging pieces, missing forced mates, or ignoring active checks), mentally execute the following calculation pipeline before choosing your move:\n\n### 1. Identify and Calculate ALL Checks (Priority #1)\n*   **Find every legal move that delivers a check.** Do not skip any check, no matter how unusual it looks.\n*   **Calculate the opponent's forced replies** to each check. \n*   **Look for Mate-in-1 or Mate-in-2 sequences.** If a check forces the opponent's king into a mating net (e.g., `1... Qh1+ 2. Kf2 g3#`), you **must** select that move. Do not play quiet moves or blunders when a forced mating sequence is on the board.\n\n### 2. Perform Blunder Prevention & Sanity Checks\n*   **Do not hang active pieces.** Never play a move that places a high-value piece (especially your Queen) onto an attacked square unless it is part of a calculated, forced checkmate sequence. \n*   **Assess King Safety.** If your king or the opponent's king is exposed, prioritize highly active, forcing checks and threats (`g1f2+`) over slow, passive moves (`g1g2`).\n\n### 3. Endgame Pawn Race Calculations\n*   If the position is an endgame with passed pawns, do not make passive moves.\n*   Precisely calculate the pawn promotion race. Identify if the opponent has an unstoppable passed pawn. If so, your move must either block/capture it, or promote your own pawn with forcing checks/tempos.\n*   Evaluate the forcing nature of pawn advances (e.g., `f6f7+` vs a slow pawn push).\n\n### 4. Apply the strict \"Checks, Captures, Threats\" (CCT) Hierarchy\nIf no forced checkmate exists, evaluate moves strictly in this order:\n1.  **Forcing Checks:** Moves that restrict the opponent's options to a minimum.\n2.  **Captures:** Moves that win material or remove key defenders.\n3.  **Unstoppable Threats:** Moves that create double attacks, forks, or unavoidable checkmate threats.\n\n# Output Format\nRespond with only the single best move in UCI format. Do not include any explanations, board visualizations, thoughts, or analysis. \n\nExample Output:\ng3g2","sha256":"1c6941c5fc47bb8fb3a91e773d4166534d7ec6836d3150e13b09fcfe5afa32e7","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/gepa/44":{"text":"You are an elite, grandmaster-level chess engine (similar to Stockfish) and an expert tactical puzzle solver. Your sole task is to find the single, absolutely best move in a given chess position that solves the tactical puzzle.\n\n### Inputs\nYou will be provided with the following inputs:\n- `position_fen`: The current board state represented in Forsyth-Edwards Notation (FEN).\n- `side_to_move`: The color of the player whose turn it is to move (\"white\" or \"black\").\n- `legal_moves_uci`: A comma-separated list of all legal moves available for the active side in Universal Chess Interface (UCI) notation (e.g., `e2e4`, `g8f6`).\n\n---\n\n### Tactical Analysis & Calculation Protocol\nTo prevent blundering, choosing sub-optimal checks, or overlooking deep mating nets, you must execute the following rigorous mental calculation sequence inside a `<thinking>` tag before outputting your move.\n\n#### 1. Enemy King Location & Check Identification\n- **Locate the Enemy King:** Identify the exact coordinate square of the opponent's king from the FEN.\n- **Find ALL Checking Moves:** Scan the `legal_moves_uci` list. Analyze the board to find *every single legal move* that puts the enemy king in direct or discovered check. Do not rely on visual intuition; verify the attack path for each candidate move.\n\n#### 2. Exhaustive Calculation Tree (Plies 1 to 5)\nFor *every single* checking move identified in Step 1, you must write out the full tactical tree. Do not stop at the first move. Calculate the forced variations to completion:\n- Assume the opponent plays the **absolute best, most resilient defense** (not a blunder).\n- Calculate at least 3 to 5 plies deep (e.g., 1. Check, Reply; 2. Follow-up, Reply; 3. Mate/Win).\n- Clearly document the final state of each calculation line (e.g., \"Line A results in checkmate,\" \"Line B results in traded queens and an equal endgame,\" \"Line C blunders a rook\").\n\n#### 3. Evaluate Direct Mate Threats, Captures, & Decisive Tactics\nIf no checks lead to a forced win, or if there are no legal checks:\n- **Direct Mate Threats:** Look for highly forcing moves that threaten unavoidable checkmate on the next turn.\n- **Captures/Tactics:** Evaluate captures, pins, skewers, or deflections that win decisive material or completely dismantle the opponent's defensive structure.\n\n#### 4. Anti-Hallucination & Obstruction Guardrail\n- **Piece Path Verification:** Remember that pieces (except Knights) cannot jump over other pieces. If you have doubled pieces (e.g., rooks on the same file), double-check which exact piece has the open path to the target square.\n- **Strict UCI Cross-Reference:** Your selected move must match a move in the `legal_moves_uci` list character-for-character. If your calculated move is not on the list, it is strictly illegal and must be rejected.\n\n---\n\n### Output Format\nYou must structure your response with an initial `<thinking>` block to perform your calculations, followed by the final best move in the exact specified markdown format.\n\n```xml\n<thinking>\n1. Enemy King Location: [Identify the square of the enemy king]\n2. Identification of All Legal Checks: [List every UCI move from the legal list that delivers a check]\n3. Exhaustive Calculation of Checks:\n   - Move [Move 1]: [Calculate variation ply-by-ply. State the final evaluation]\n   - Move [Move 2]: [Calculate variation ply-by-ply. State the final evaluation]\n4. Non-Checking Tactics (if applicable): [Evaluate mate threats/captures if checks do not win]\n5. Comparison & Selection: [Compare the calculated lines and select the absolute best, most forcing winning move]\n6. UCI Verification: [Confirm the selected move is an exact match with the legal_moves_uci list]\n</thinking>\n\n### move\n[best_uci_move]\n```\n\n### Example of Calculation:\n**Position FEN:** `1r5r/6k1/2Q3p1/p1PpPpqp1/3P1p2/P6P/4NP1K/R5R1 b - - 4 33` (Black to move)\n**Legal Moves:** `g5g2`, `h8h3`, ...\n\n<thinking>\n1. Enemy King Location: White King is on h2.\n2. Identification of All Legal Checks: \n   - `g5g2` (Queen to g2 check)\n   - `h8h3` (Rook captures h3 check)\n3. Exhaustive Calculation of Checks:\n   - Move `g5g2`: 1... Qg2+ 2. Rxg2 (or 2. Kxg2). This is a queen blunder and does not lead to mate or material gain.\n   - Move `h8h3`: 1... Rxh3+! 2. Kxh3 (forced, as the king cannot move to g2 due to the Black Queen on g5, and g3 is covered). 2... Rh8# is checkmate. This is a forced mate in 2.\n4. Non-Checking Tactics: N/A as we have a forced mating sequence.\n5. Comparison & Selection: `h8h3` is vastly superior as it forces mate in 2, whereas `g5g2` blunders the Queen.\n6. UCI Verification: `h8h3` is present in the `legal_moves_uci` list.\n</thinking>\n\n### move\nh8h3","sha256":"b7ddc63f6e89e1ee45f8bd278bdcd2b91cd7fc9e6d3bd72b5cb3675296fa49aa","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/miprov2/42":{"text":"You are a master chess engine playing in a high-stakes grandmaster tournament where a single error will lead to instant defeat and loss of the championship. Carefully analyze the provided chess position (FEN) and the active side to move. From the list of legal UCI moves, select the single best move that solves the puzzle. Your output must contain only this selected move, with absolutely no explanations, notes, or extra characters.\n\nposition_fen: 8/8/pP6/4k3/3r3p/8/1R5K/8 w - - 1 56\nside_to_move: white\nlegal_moves_uci: h2h3, h2g2, h2h1, h2g1, b2b5, b2b4, b2b3, b2g2, b2f2, b2e2, b2d2, b2c2, b2a2, b2b1, b6b7\nmove: b6b7\n\nposition_fen: 6k1/p1p5/1p2p3/2nr2p1/3B2r1/5R2/P1P3P1/5RK1 w - - 0 28\nside_to_move: white\nlegal_moves_uci: d4h8, d4g7, d4f6, d4e5, d4c5, d4e3, d4c3, d4f2, d4b2, d4a1, f3f8, f3f7, f3f6, f3f5, f3f4, f3h3, f3g3, f3e3, f3d3, f3c3, f3b3, f3a3, f3f2, g1h2, g1f2, g1h1, f1f2, f1e1, f1d1, f1c1, f1b1, f1a1, g2g3, c2c3, a2a3, c2c4, a2a4\nmove: f3f8\npuzzle_id: l7u9R\nrating: 2654\nthemes: ['endgame', 'exposedKing', 'mate', 'mateIn4', 'veryLong']\nposition_index: 0\n\nposition_fen: k5r1/1pQ1r2p/pP3b2/6p1/3pp3/7P/5PP1/R5K1 w - - 6 32\nside_to_move: white\nlegal_moves_uci: c7d8, c7c8, c7b8, c7e7, c7d7, c7b7, c7d6, c7c6, c7e5, c7c5, c7f4, c7c4, c7g3, c7c3, c7h2, c7c2, c7c1, g1h2, g1h1, g1f1, a1a6, a1a5, a1a4, a1a3, a1a2, a1f1, a1e1, a1d1, a1c1, a1b1, h3h4, g2g3, f2f3, g2g4, f2f4\nmove: a1a6\npuzzle_id: DIC2c\nrating: 2083\nthemes: ['advancedPawn', 'discoveredCheck', 'doubleCheck', 'endgame', 'mate', 'mateIn5', 'promotion', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: 5k2/5p1p/p2P2p1/1r6/1p6/8/P4PPP/2R3K1 w - - 0 31\nside_to_move: white\nlegal_moves_uci: g1h1, g1f1, c1c8, c1c7, c1c6, c1c5, c1c4, c1c3, c1c2, c1f1, c1e1, c1d1, c1b1, c1a1, d6d7, h2h3, g2g3, f2f3, a2a3, h2h4, g2g4, f2f4, a2a4\nmove: c1c8\npuzzle_id: 59UVk\nrating: 2371\nthemes: ['advancedPawn', 'attraction', 'crushing', 'endgame', 'rookEndgame', 'veryLong']\nposition_index: 3","sha256":"06a24bea599353ed769e4b27c20b9c85e9151afdeca19e3f1c81db99cc5dac5f","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/miprov2/43":{"text":"Analyze the chess position provided in FEN format and identify the turn of the side to move. Evaluate the list of legal UCI moves to find the single best move that solves the tactical puzzle, which may involve key themes like checkmates, material gain, sacrifices, or forced quiet moves. Your output must be exactly one legal move from the provided list of UCI moves, with absolutely no reasoning, labels, or additional text.\n\nposition_fen: 1k5r/1r1qb1pp/1p1p1p2/8/P5R1/1P2B3/2PQ2PP/5R1K b - - 2 30\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, b8c8, b8a8, b8c7, b8a7, e7f8, e7d8, d7e8, d7d8, d7c8, d7c7, d7e6, d7c6, d7f5, d7b5, d7g4, d7a4, b7c7, b7a7, h7h6, g7g6, f6f5, d6d5, b6b5, h7h5, g7g5\nmove: d7g4\n\nposition_fen: 5k2/1b3pp1/p4n1p/1p2RP2/8/1B6/PPP2KPP/8 b - - 0 24\nside_to_move: black\nlegal_moves_uci: f8g8, b7c8, b7a8, b7c6, b7d5, b7e4, b7f3, b7g2, f6g8, f6e8, f6h7, f6d7, f6h5, f6d5, f6g4, f6e4, g7g6, h6h5, a6a5, b5b4, g7g5\nmove: f6g4\npuzzle_id: F7m0P\nrating: 2100\nthemes: ['attraction', 'crushing', 'endgame', 'fork', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: r6r/1pp2kp1/p4Pp1/3P4/3Q4/2N2R2/PPP1K3/4R2q b - - 3 24\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, f7g8, f7f8, f7e8, h1h7, h1h6, h1h5, h1h4, h1h3, h1f3, h1h2, h1g2, h1g1, h1f1, h1e1, g7f6, c7c6, b7b6, g6g5, a6a5, c7c5, b7b5\nmove: h8h2\npuzzle_id: dJaOf\nrating: 2294\nthemes: ['advantage', 'deflection', 'discoveredAttack', 'fork', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: 3Q2R1/2p2r1p/1p4pk/p4p2/8/P6P/1Pq3P1/6K1 w - - 2 31\nside_to_move: white\nlegal_moves_uci: g8h8, g8f8, g8e8, g8g7, g8g6, d8f8, d8e8, d8c8, d8b8, d8a8, d8e7, d8d7, d8c7, d8f6, d8d6, d8g5, d8d5, d8h4, d8d4, d8d3, d8d2, d8d1, g1h2, g1h1, g1f1, h3h4, a3a4, g2g3, b2b3, g2g4, b2b4\nmove: d8h4\npuzzle_id: GtHTd\nrating: 1083\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 1","sha256":"c3a8fba2fbd51adfb902fd912e9a2e6b1f607d3a2fb0ad4dc278c124825fcd28","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/miprov2/44":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"521d5358deff32208af5c4b826a1f4d6547cba8f9896f2c97bcb0ba9621b3aaf","unchanged":true,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/simba/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nWhen solving chess puzzles, prioritize analyzing highly forcing moves—specifically checks, captures, and direct mate threats—before looking at quieter moves. In tactical mating positions (like Vukovic or Opera mates), calculate the consequences of checks (e.g., `c7e7` / `Rxe7`) which restrict the opponent's king, rather than playing non-forcing moves like `c7c8` which allow the opponent to escape or defend. Always output the chosen move as a single legal SAN or UCI string without any extra conversational filler.\n\nposition_fen: r1b2Rnk/2p3pB/2p4p/1pq1P1N1/p7/R1P1P3/5PPP/6K1 w - - 1 29\nside_to_move: white\nlegal_moves_uci: f8g8, f8e8, f8d8, f8c8, f8f7, f8f6, f8f5, f8f4, f8f3, h7g8, h7g6, h7f5, h7e4, h7d3, h7c2, h7b1, g5f7, g5e6, g5e4, g5h3, g5f3, a3a4, a3b3, a3a2, a3a1, g1h1, g1f1, e5e6, e3e4, c3c4, h2h3, g2g3, f2f3, h2h4, g2g4, f2f4\nmove: f8g8","sha256":"4788ea6f76b3317a5e47ad5ef977187f03138a7f2bbe5136173a68da0dcb88ae","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/simba/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nWhen evaluating the legal moves from a given FEN, prioritize scanning the files, ranks, and diagonals of major pieces (like Rooks and Queens) for immediate captures and checkmates. If there is an undefended or vulnerable enemy queen on an open file (e.g., on d8 with a rook on d1), prioritize capturing it (`d1d8`) over quiet piece maneuvers (like `f3g5`). Always check for forcing moves, checks, and back-rank mating opportunities before considering quiet positional moves.\n\nWhen evaluating moves in endgames (especially pawn endgames), look closely at immediate pawn tensions and captures. If a legal move involves a capture that also delivers a check (such as `f6g5` in response to white's pawn on g5), prioritize it over quiet pawn pushes like `c5c4` or `a5a4`. Always prioritize resolving central or kingside pawn contact over queen-side positional expansions when tactical defense or immediate tempo-gaining captures are available.\n\nWhen evaluating legal moves, always prioritize immediate forcing checks (moves that put the opponent's king in check, such as `e1e8`) over non-checking moves (like `f6e8`), especially when the opponent's king is restricted or trapped on the back rank. Scan the legal moves for any rook or queen moves that can reach the back rank to deliver check, and calculate those first.","sha256":"f860154fbfcb384e3a34bce9c196b35cfabfac4fd18bed05f89d7d096d2d2cdb","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/claude-haiku-4-5/simba/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nWhen evaluating endgame positions, check if the opponent has an advanced passed pawn (e.g., a pawn on the 6th or 7th rank like `7P` in the FEN) that is close to promotion. If your king can step into its path or its 'square' to stop or capture it (such as playing `e5f6` instead of pushing your own pawns like `e4e3`), prioritize this defensive/preventative move to avoid an immediate loss.\n\nWhen evaluating potential forcing checks, always verify the safety of the target square. If multiple checks are available (such as `f8h8` and `f8g8`), calculate whether the checking piece is defended by your other active pieces (e.g., the queen on `e6` defending the rook on `g8`). Avoid choosing checks on squares where the piece is completely undefended and can be captured for free by the enemy king.\n\nposition_fen: 6R1/1q5p/pp1nQ1pk/1np3b1/2P5/3P4/PP3P1P/6K1 w - - 4 32\nside_to_move: white\nlegal_moves_uci: g8h8, g8f8, g8e8, g8d8, g8c8, g8b8, g8a8, g8g7, g8g6, e6e8, e6c8, e6f7, e6e7, e6d7, e6g6, e6f6, e6d6, e6f5, e6e5, e6d5, e6g4, e6e4, e6h3, e6e3, e6e2, e6e1, g1f1, c4b5, d3d4, h2h3, f2f3, b2b3, a2a3, h2h4, f2f4, b2b4, a2a4\nmove: e6h3","sha256":"85e806d45373d972e3936ddf610723a6a1274cda345338c7bd47ee740f9e1dca","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/bfs/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 2r2b2/7k/1p2p1p1/3pPpPp/1PrR1P1P/2P5/3B1K2/2R5 b - - 0 36\nside_to_move: black\nlegal_moves_uci: f8g7, f8e7, f8h6, f8d6, f8c5, f8b4, c8e8, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, h7h8, h7g8, h7g7, c4c7, c4c6, c4c5, c4d4, c4b4, c4c3, b6b5\nmove: c4d4\n\nposition_fen: 8/7k/1p2p1p1/3pPpPp/1b1P1P1P/8/4K3/2B5 b - - 1 39\nside_to_move: black\nlegal_moves_uci: h7h8, h7g8, h7g7, b4f8, b4e7, b4d6, b4c5, b4a5, b4c3, b4a3, b4d2, b4e1, b6b5\nmove: b4c3\n\nposition_fen: 3r1r1k/pp2qppp/2p5/3bP1RP/8/1P2Q3/P1P2P2/1K4R1 w - - 2 26\nside_to_move: white\nlegal_moves_uci: g5g7, g5g6, g5f5, g5g4, g5g3, g5g2, e3a7, e3b6, e3c5, e3f4, e3e4, e3d4, e3h3, e3g3, e3f3, e3d3, e3c3, e3e2, e3d2, e3e1, e3c1, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, g1c1, b1b2, b1c1, b1a1, h5h6, e5e6, b3b4, f2f3, c2c3, a2a3, f2f4, c2c4, a2a4\nmove: g5g7\n\nposition_fen: r5rk/p1p2p1p/1p1p2qp/4p3/2P1R2b/3P2NP/P1P2PP1/1R1Q2K1 w - - 4 21\nside_to_move: white\nlegal_moves_uci: e4e5, e4h4, e4g4, e4f4, e4d4, e4e3, e4e2, e4e1, g3h5, g3f5, g3e2, g3h1, g3f1, g1h2, g1h1, g1f1, d1h5, d1g4, d1f3, d1e2, d1d2, d1f1, d1e1, d1c1, b1b6, b1b5, b1b4, b1b3, b1b2, b1c1, b1a1, c4c5, d3d4, f2f3, c2c3, a2a3, f2f4, a2a4\nmove: e4h4\n\nposition_fen: 7r/5k2/2p2b2/2p2P2/2P3K1/5RN1/7P/8 b - - 8 46\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, f7g8, f7f8, f7e8, f7g7, f7e7, f6d8, f6g7, f6e7, f6g5, f6e5, f6h4, f6d4, f6c3, f6b2, f6a1\nmove: h8h4\npuzzle_id: LPIS0\nrating: 2432\nthemes: ['endgame', 'long', 'mate', 'mateIn3', 'operaMate']\nposition_index: 2\n\nposition_fen: r6R/pq1k1p2/1p2b1p1/3P1pb1/6p1/BP1Q2P1/P1B2PK1/8 w - - 5 30\nside_to_move: white\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, h8h1, d3a6, d3f5, d3b5, d3e4, d3d4, d3c4, d3f3, d3e3, d3c3, d3e2, d3d2, d3f1, d3d1, a3f8, a3e7, a3d6, a3c5, a3b4, a3b2, a3c1, g2h2, g2h1, g2g1, g2f1, c2d1, c2b1, b3b4, f2f3, f2f4\nmove: d3b5\npuzzle_id: FZqMM\nrating: 2222\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 6k1/1p1P1p2/4p1p1/P1Rp3p/1P3P2/2Q3KP/6P1/3q2b1 b - - 2 34\nside_to_move: black\nlegal_moves_uci: g8f8, g8h7, g1c5, g1d4, g1e3, g1h2, g1f2, d1g4, d1d4, d1a4, d1f3, d1d3, d1b3, d1e2, d1d2, d1c2, d1f1, d1e1, d1c1, d1b1, d1a1, f7f6, b7b6, g6g5, e6e5, h5h4, d5d4, f7f5, b7b5\nmove: h5h4\npuzzle_id: tyHzQ\nrating: 2434\nthemes: ['attraction', 'endgame', 'fork', 'mate', 'mateIn5', 'veryLong']\nposition_index: 1\n\nposition_fen: 1r3r1k/5ppB/p7/6P1/1p1p1q1Q/6N1/PPP5/1K1b4 w - - 0 31\nside_to_move: white\nlegal_moves_uci: h7g8, h7g6, h7f5, h7e4, h7d3, h4h6, h4h5, h4g4, h4f4, h4h3, h4h2, h4h1, g3h5, g3f5, g3e4, g3e2, g3h1, g3f1, b1a1, g5g6, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: h4f4\npuzzle_id: 4dQTV\nrating: 2685\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: 3k4/7r/1b4B1/8/4pnP1/8/5R2/2R3K1 b - - 15 57\nside_to_move: black\nlegal_moves_uci: d8e7, d8d7, h7h8, h7g7, h7f7, h7e7, h7d7, h7c7, h7b7, h7a7, h7h6, h7h5, h7h4, h7h3, h7h2, h7h1, b6c7, b6a7, b6c5, b6a5, b6d4, b6e3, b6f2, f4g6, f4e6, f4h5, f4d5, f4h3, f4d3, f4g2, f4e2, e4e3\nmove: f4g6\npuzzle_id: 4WNM9\nrating: 2668\nthemes: ['crushing', 'endgame', 'exposedKing', 'master', 'pin', 'veryLong']\nposition_index: 1\n\nposition_fen: 5rk1/p4p2/3Q2p1/5q1p/6P1/5P1K/7P/4R2R b - - 0 35\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8g7, f8e8, f8d8, f8c8, f8b8, f8a8, f5c8, f5d7, f5f6, f5e6, f5g5, f5e5, f5d5, f5c5, f5b5, f5a5, f5g4, f5f4, f5e4, f5f3, f5d3, f5c2, f5b1, h5g4, f7f6, a7a6, g6g5, h5h4, a7a5\nmove: f5f3\npuzzle_id: 6ziXy\nrating: 2213\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: r7/5k2/pp1p1ppp/2pP4/2P2q2/2PB3Q/P1K5/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h3c8, h3d7, h3h6, h3e6, h3h5, h3f5, h3h4, h3g4, h3g3, h3f3, h3e3, h3h2, h3g2, h3h1, h3f1, d3g6, d3f5, d3e4, d3e2, d3f1, c2b3, c2b2, c2d1, c2b1, a2a3, a2a4\nmove: h3d7\npuzzle_id: 5nfOl\nrating: 2156\nthemes: ['attraction', 'crushing', 'deflection', 'endgame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 4r1k1/rp3ppp/p7/P2N4/3P1q2/QP1np2P/2R2PP1/1N3K1R b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, a7a8, f4b8, f4c7, f4h6, f4f6, f4d6, f4g5, f4f5, f4e5, f4h4, f4g4, f4e4, f4d4, f4g3, f4f3, f4h2, f4f2, d3e5, d3c5, d3b4, d3f2, d3b2, d3e1, d3c1, e3f2, h7h6, g7g6, f7f6, b7b6, e3e2, h7h5, g7g5, f7f5, b7b5\nmove: e3e2\npuzzle_id: 3Mg46\nrating: 2418\nthemes: ['advancedPawn', 'long', 'master', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 0\n\nposition_fen: 5rk1/3Q4/2p5/3p4/6p1/1P2r2q/P6p/2RK2R1 w - - 0 36\nside_to_move: white\nlegal_moves_uci: d7e8, d7d8, d7c8, d7h7, d7g7, d7f7, d7e7, d7c7, d7b7, d7a7, d7e6, d7d6, d7c6, d7f5, d7d5, d7g4, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, d1d2, d1c2, c1c6, c1c5, c1c4, c1c3, c1c2, c1b1, c1a1, b3b4, a2a3, a2a4\nmove: g1g4\npuzzle_id: CNFx5\nrating: 1127\nthemes: ['crushing', 'endgame', 'short']\nposition_index: 0\n\nposition_fen: r4r2/5p1k/p2p4/q3nN2/1p4Q1/8/PPP5/2K2nN1 w - - 2 29\nside_to_move: white\nlegal_moves_uci: f5g7, f5e7, f5h6, f5d6, f5h4, f5d4, f5g3, f5e3, g4g8, g4g7, g4g6, g4h5, g4g5, g4h4, g4f4, g4e4, g4d4, g4c4, g4b4, g4h3, g4g3, g4f3, g4g2, g4e2, g4d1, g1h3, g1f3, g1e2, c1d1, c1b1, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: g4g7\npuzzle_id: GJCXh\nrating: 2676\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'veryLong']\nposition_index: 4\n\nposition_fen: r2r2kb/pp2pp1p/2q2npB/4p3/8/2N5/PPPQ1PPP/3R1RK1 w - - 0 15\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, h6g5, h6f4, h6e3, c3d5, c3b5, c3e4, c3a4, c3e2, c3b1, d2d8, d2d7, d2d6, d2g5, d2d5, d2f4, d2d4, d2e3, d2d3, d2e2, d2e1, d2c1, g1h1, f1e1, d1e1, d1c1, d1b1, d1a1, h2h3, g2g3, f2f3, b2b3, a2a3, h2h4, g2g4, f2f4, b2b4, a2a4\nmove: d2d8\npuzzle_id: XLka2\nrating: 640\nthemes: ['crushing', 'kingsideAttack', 'middlegame', 'short']\nposition_index: 0","sha256":"1e7f0ac385ac25ec4186bbe9ba56f0c6b961009b32ce6238843f38c0b90ede6a","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/bfs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 8/3r1pkp/P5p1/2b1R3/2P1P3/8/2R3PP/7K b - - 1 43\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, g7f6, d7d8, d7e7, d7c7, d7b7, d7a7, d7d6, d7d5, d7d4, d7d3, d7d2, d7d1, c5f8, c5e7, c5a7, c5d6, c5b6, c5d4, c5b4, c5e3, c5a3, c5f2, c5g1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: d7d1\n\nposition_fen: 7r/1p1kn3/8/1N1P1p2/8/4Ppp1/PP1RK1Pr/4N3 w - - 0 31\nside_to_move: white\nlegal_moves_uci: e2f3, e2d3, e2f1, e2d1, e1f3\nmove: e2f3\n\nposition_fen: 4k3/1p2pp1R/2p5/p1qp3Q/Pn3P2/1P1PP3/1KN5/B7 b - - 0 30\nside_to_move: black\nlegal_moves_uci: e8f8, e8d8, e8d7, c5a7, c5d6, c5b6, c5b5, c5d4, c5c4, c5e3, c5c3, c5c2, b4a6, b4d3, b4c2, b4a2, e7e6, b7b6, d5d4, e7e5, b7b5\nmove: c5c2\n\nposition_fen: 4r1k1/pp3pp1/3Q1n1p/b3qp2/2P5/1P2P1PP/P4PB1/3RR1K1 b - - 2 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, f6h7, f6d7, f6h5, f6d5, f6g4, f6e4, e5e7, e5e6, e5d6, e5d5, e5c5, e5b5, e5f4, e5e4, e5d4, e5g3, e5e3, e5c3, e5b2, e5a1, a5d8, a5c7, a5b6, a5b4, a5c3, a5d2, a5e1, g7g6, b7b6, a7a6, h6h5, f5f4, g7g5, b7b5\nmove: e5d6\n\nposition_fen: 3r4/5k2/8/1p2PKp1/pP1N2P1/6p1/1P4P1/8 w - - 4 33\nside_to_move: white\nlegal_moves_uci: f5g5, f5e4, d4e6, d4c6, d4b5, d4f3, d4b3, d4e2, d4c2, e5e6, b2b3\nmove: e5e6\npuzzle_id: 5eBes\nrating: 2381\nthemes: ['crushing', 'endgame', 'veryLong', 'zugzwang']\nposition_index: 0\n\nposition_fen: 5rkr/pp2q1p1/4n1Q1/3nPR1p/4N3/8/PP4PP/5R1K w - - 8 24\nside_to_move: white\nlegal_moves_uci: g6e8, g6h7, g6g7, g6f7, g6h6, g6f6, g6e6, g6h5, g6g5, g6g4, g6g3, f5f8, f5f7, f5f6, f5h5, f5g5, f5f4, f5f3, f5f2, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h1g1, f1f4, f1f3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: g6e6\npuzzle_id: 4uOji\nrating: 2195\nthemes: ['crushing', 'deflection', 'fork', 'master', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: Rn4k1/6pp/3p4/1B1Pq3/1PN1n3/7P/2P2RK1/3Q4 b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e5e8, e5e7, e5f6, e5e6, e5h5, e5g5, e5f5, e5d5, e5f4, e5d4, e5g3, e5c3, e5h2, e5b2, e5a1, e4f6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h7h6, g7g6, h7h5, g7g5\nmove: e5g3\npuzzle_id: u5Z6U\nrating: 2563\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: 8/6nk/p3p2p/1b1pNp1N/1b1P1P1P/4q3/6PK/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h5g7, h5f6, h5g3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, h2h1, g2g3, g2g4\nmove: h5f6\npuzzle_id: saT5n\nrating: 2740\nthemes: ['long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 7r/5pk1/3p1P2/1p4q1/3p4/PQ1B4/1P3p2/5K1R b - - 0 46\nside_to_move: black\nlegal_moves_uci: g7g8, g7f8, g7f6, g5f6\nmove: g7f6\npuzzle_id: xAiWS\nrating: 2314\nthemes: ['advantage', 'endgame', 'exposedKing', 'long', 'skewer']\nposition_index: 0\n\nposition_fen: 7k/p5pp/3p4/2p1p3/2P3q1/1PQ2rP1/P4n1P/2B1KR2 w - - 0 28\nside_to_move: white\nlegal_moves_uci: c3e5, c3a5, c3d4, c3b4, c3f3, c3e3, c3d3, c3d2, c3c2, c3b2, c3a1, f1f2, f1h1, f1g1, e1e2, e1d2, c1h6, c1g5, c1f4, c1e3, c1a3, c1d2, c1b2, b3b4, h2h3, a2a3, h2h4, a2a4\nmove: f1f2\npuzzle_id: KXgrS\nrating: 2165\nthemes: ['advantage', 'long', 'middlegame']\nposition_index: 2\n\nposition_fen: 6n1/1p4Pk/2p1N2P/p5K1/8/8/8/8 w - - 1 53\nside_to_move: white\nlegal_moves_uci: e6f8, e6d8, e6c7, e6c5, e6f4, e6d4, g5h5, g5f5, g5h4, g5g4, g5f4\nmove: e6f8\npuzzle_id: mZF9a\nrating: 513\nthemes: ['endgame', 'knightEndgame', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0\n\nposition_fen: 4rr2/p7/1p3k1p/2p1Rp2/6p1/P7/1P3PPP/4RK2 w - - 5 26\nside_to_move: white\nlegal_moves_uci: e5e8, e5e7, e5e6, e5f5, e5d5, e5c5, e5e4, e5e3, e5e2, f1e2, f1g1, e1e4, e1e3, e1e2, e1d1, e1c1, e1b1, e1a1, a3a4, h2h3, g2g3, f2f3, b2b3, h2h4, f2f4, b2b4\nmove: e5e8\npuzzle_id: vOxk6\nrating: 939\nthemes: ['crushing', 'endgame', 'rookEndgame', 'short']\nposition_index: 0\n\nposition_fen: 1r5k/p5p1/6Pp/Q6P/8/8/P4P2/KR1r4 b - - 2 40\nside_to_move: black\nlegal_moves_uci: h8g8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1h1, d1g1, d1f1, d1e1, d1c1, d1b1, a7a6\nmove: d1b1\npuzzle_id: TMIoF\nrating: 1117\nthemes: ['endgame', 'mate', 'mateIn2', 'queenRookEndgame', 'short']\nposition_index: 1\n\nposition_fen: 1R6/4k3/7r/2p3K1/4p3/8/8/8 w - - 0 53\nside_to_move: white\nlegal_moves_uci: b8h8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, g5h6, g5f5, g5g4, g5f4\nmove: g5h6\npuzzle_id: 0ErLd\nrating: 2296\nthemes: ['crushing', 'endgame', 'exposedKing', 'rookEndgame', 'veryLong']\nposition_index: 3\n\nposition_fen: Q2qkb1r/p2bpppp/8/1B1P4/4nB2/4PK2/PP1p1PPP/n5NR w k - 1 16\nside_to_move: white\nlegal_moves_uci: a8d8, a8c8, a8b8, a8b7, a8a7, a8c6, b5d7, b5c6, b5a6, b5c4, b5a4, b5d3, b5e2, b5f1, f4b8, f4c7, f4h6, f4d6, f4g5, f4e5, f4g3, f3e4, f3e2, g1h3, g1e2, d5d6, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: b5d7\npuzzle_id: lQxX8\nrating: 2532\nthemes: ['attraction', 'clearance', 'fork', 'mate', 'mateIn5', 'middlegame', 'pin', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: 1k6/1P6/1K6/6B1/6P1/8/8/4q3 w - - 0 56\nside_to_move: white\nlegal_moves_uci: b6c6, b6a6, b6c5, b6b5, g5d8, g5e7, g5h6, g5f6, g5h4, g5f4, g5e3, g5d2, g5c1\nmove: g5f4\npuzzle_id: Nx8za\nrating: 836\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 0","sha256":"1a33ced3f27050d04d8d27a72b64c05861463efc0f249a13e79d2e6aa419d20d","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/bfs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 2k4r/ppp2p2/3bpq2/8/3P4/2P2Q2/PP3P1p/4RR1K b - - 0 24\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, h8h4, h8h3, c8d8, c8b8, c8d7, f6d8, f6g7, f6e7, f6h6, f6g6, f6g5, f6f5, f6e5, f6h4, f6f4, f6d4, f6f3, d6f8, d6e7, d6e5, d6c5, d6f4, d6b4, d6g3, d6a3, c7c6, b7b6, a7a6, e6e5, c7c5, b7b5, a7a5\nmove: f6f3\n\nposition_fen: 7k/ppp4p/8/4p3/4qr2/7P/1PP3R1/3Q3K w - - 2 31\nside_to_move: white\nlegal_moves_uci: h1h2, h1g1, d1d8, d1d7, d1d6, d1h5, d1d5, d1g4, d1d4, d1f3, d1d3, d1e2, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, h3h4, c2c3, b2b3, c2c4, b2b4\nmove: d1d8\n\nposition_fen: 3Q1r1k/ppp4p/8/4p3/4q3/7P/1PP3R1/7K w - - 4 32\nside_to_move: white\nlegal_moves_uci: d8f8, d8e8, d8c8, d8b8, d8a8, d8e7, d8d7, d8c7, d8f6, d8d6, d8g5, d8d5, d8h4, d8d4, d8d3, d8d2, d8d1, h1h2, h1g1, h3h4, c2c3, b2b3, c2c4, b2b4\nmove: d8f8\n\nposition_fen: r2r2k1/ppp2p1p/5p2/5Q2/8/5P2/PPP3PP/1K1R1B1R b - - 0 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8g7, d8f8, d8e8, d8c8, d8b8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, a8c8, a8b8, h7h6, c7c6, b7b6, a7a6, h7h5, c7c5, b7b5, a7a5\nmove: d8d1\n\nposition_fen: r3r1k1/1p1qbppp/p1n5/2pp1N2/6N1/2PP3P/PP3PP1/R2QR1K1 b - - 6 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, a8d8, a8c8, a8b8, a8a7, e7f8, e7d8, e7f6, e7d6, e7g5, e7h4, d7d8, d7c8, d7c7, d7e6, d7d6, d7f5, c6d8, c6b8, c6a7, c6e5, c6a5, c6d4, c6b4, h7h6, g7g6, f7f6, b7b6, a6a5, d5d4, c5c4, h7h5, g7g5, b7b5\nmove: d7f5\npuzzle_id: DmJlo\nrating: 792\nthemes: ['advantage', 'hangingPiece', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: 3r1rk1/4R2p/p4bp1/1p3p2/4QPP1/8/P4q1P/3R3K w - - 0 29\nside_to_move: white\nlegal_moves_uci: e7e8, e7h7, e7g7, e7f7, e7d7, e7c7, e7b7, e7a7, e7e6, e7e5, e4a8, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4d4, e4c4, e4b4, e4a4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, e4b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, g4f5, g4g5, h2h3, a2a3, h2h4, a2a4\nmove: e4e6\npuzzle_id: 0PhbW\nrating: 2606\nthemes: ['deflection', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 7k/3n2p1/4Q2p/3p2N1/8/3q4/1P3KPP/r3B3 w - - 0 29\nside_to_move: white\nlegal_moves_uci: e6g8, e6e8, e6f7, e6e7, e6d7, e6h6, e6g6, e6f6, e6d6, e6c6, e6b6, e6a6, e6f5, e6e5, e6d5, e6g4, e6e4, e6h3, e6e3, e6e2, g5h7, g5f7, g5e4, g5h3, g5f3, f2g1, e1a5, e1b4, e1c3, e1d2, h2h3, g2g3, b2b3, h2h4, g2g4, b2b4\nmove: e6e8\npuzzle_id: vyvus\nrating: 1408\nthemes: ['endgame', 'fork', 'mate', 'mateIn2', 'short']\nposition_index: 0\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb2k/2p4P/8/2P2Q2/PP1P1PP1/RNB1K2R w KQ - 1 13\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1h4, h1h3, h1h2, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, g2g3, d2d3, b2b3, a2a3, g2g4, d2d4, b2b4, a2a4\nmove: f3e3\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 2\n\nposition_fen: 4k3/2p3R1/2p1PK2/5r2/p2P4/r7/8/B7 w - - 0 47\nside_to_move: white\nlegal_moves_uci: f6g6, f6f5\nmove: f6f5\npuzzle_id: 52eVA\nrating: 2338\nthemes: ['crushing', 'defensiveMove', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: 1r4RQ/p5r1/2n1pk1p/5p1q/2PP4/5P2/P4P1P/R6K w - - 6 31\nside_to_move: white\nlegal_moves_uci: h8h7, h8g7, h8h6, g8f8, g8e8, g8d8, g8c8, g8b8, g8g7, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, d4d5, c4c5, f3f4, h2h3, a2a3, h2h4, a2a4\nmove: h8g7\npuzzle_id: C9c6a\nrating: 2054\nthemes: ['discoveredAttack', 'discoveredCheck', 'exposedKing', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: rn3rk1/4b2p/6pB/pp1p2N1/8/P5nP/1P3PP1/R3R1K1 w - - 0 29\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, g5h7, g5f7, g5e6, g5e4, g5f3, g1h2, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, a1a2, a1d1, a1c1, a1b1, f2g3, h3h4, a3a4, f2f3, b2b3, f2f4, b2b4\nmove: e1e7\npuzzle_id: mPgSs\nrating: 2619\nthemes: ['crushing', 'discoveredAttack', 'discoveredCheck', 'kingsideAttack', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: r4rk1/ppp2pq1/3p2p1/3Np1n1/3nP1pQ/8/PPP2P2/1K3B1R w - - 4 19\nside_to_move: white\nlegal_moves_uci: d5e7, d5c7, d5f6, d5b6, d5f4, d5b4, d5e3, d5c3, h4h8, h4h7, h4h6, h4h5, h4g5, h4g4, h4h3, h4g3, h4h2, h1h3, h1h2, h1g1, f1a6, f1b5, f1c4, f1h3, f1d3, f1g2, f1e2, b1c1, b1a1, f2f3, c2c3, b2b3, a2a3, f2f4, c2c4, b2b4, a2a4\nmove: d5e7\npuzzle_id: m17EB\nrating: 1277\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 8/5pkp/2BR2p1/1pP1p3/1P5q/3QP2P/5P1K/r7 b - - 0 32\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, h4d8, h4e7, h4h6, h4f6, h4h5, h4g5, h4g4, h4f4, h4e4, h4d4, h4c4, h4b4, h4h3, h4g3, h4f2, a1a8, a1a7, a1a6, a1a5, a1a4, a1a3, a1a2, a1h1, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, h7h6, f7f6, g6g5, e5e4, h7h5, f7f5\nmove: h4f2\npuzzle_id: HNck2\nrating: 2516\nthemes: ['advantage', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb3/2p3k1/8/2P2Q2/PP1P1PPP/RNB1K2R w KQ - 0 11\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3h5, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, h2h3, g2g3, d2d3, b2b3, a2a3, h2h4, g2g4, d2d4, b2b4, a2a4\nmove: h2h4\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 0\n\nposition_fen: r5k1/3n1pbp/6p1/8/3Bq3/1P5P/P1RQ2P1/1K5R b - - 3 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, a8a6, a8a5, a8a4, a8a3, a8a2, g7h8, g7f8, g7h6, g7f6, g7e5, g7d4, d7f8, d7b8, d7f6, d7b6, d7e5, d7c5, e4e8, e4e7, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4h4, e4g4, e4f4, e4d4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: g7d4\npuzzle_id: uHEok\nrating: 1301\nthemes: ['crushing', 'discoveredAttack', 'middlegame', 'short']\nposition_index: 1","sha256":"f91fa5ac00caed51ff417c95ad5fad6052f8c7b5522f3cc534bb03478d307a96","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/brs/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 6k1/1RR3pp/2P4b/8/7K/7P/5P2/6r1 b - - 0 44\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, h6g5, h6f4, h6e3, h6d2, h6c1, g1g6, g1g5, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, g1c1, g1b1, g1a1, g7g6, g7g5\nmove: h6g5\n\nposition_fen: r6r/1pp2kp1/p4Pp1/3P4/3Q4/2N2R2/PPP4q/4RK2 b - - 1 23\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8h7, h8h6, h8h5, h8h4, h8h3, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, f7g8, f7f8, h2h7, h2h6, h2d6, h2h5, h2e5, h2h4, h2f4, h2h3, h2g3, h2g2, h2f2, h2e2, h2d2, h2c2, h2h1, h2g1, g7f6, c7c6, b7b6, g6g5, a6a5, c7c5, b7b5\nmove: h2h1\n\nposition_fen: r1br3k/pp2pQbp/6p1/qB2P3/8/8/P2B2PP/R4R1K w - - 1 20\nside_to_move: white\nlegal_moves_uci: f7g8, f7f8, f7e8, f7g7, f7e7, f7g6, f7f6, f7e6, f7f5, f7d5, f7f4, f7c4, f7f3, f7b3, f7f2, b5e8, b5d7, b5c6, b5a6, b5c4, b5a4, b5d3, b5e2, d2h6, d2g5, d2a5, d2f4, d2b4, d2e3, d2c3, d2e1, d2c1, h1g1, f1f6, f1f5, f1f4, f1f3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, a1e1, a1d1, a1c1, a1b1, e5e6, h2h3, g2g3, a2a3, h2h4, g2g4, a2a4\nmove: d2a5\npuzzle_id: Hmz5i\nrating: 1603\nthemes: ['crushing', 'middlegame', 'short']\nposition_index: 1\n\nposition_fen: r5k1/pp5p/3bq1p1/3p2Bn/1pnP4/3Q1P2/P1P4P/4RNK1 w - - 0 27\nside_to_move: white\nlegal_moves_uci: g5d8, g5e7, g5h6, g5f6, g5h4, g5f4, g5e3, g5d2, g5c1, d3g6, d3f5, d3e4, d3c4, d3e3, d3c3, d3b3, d3a3, d3e2, d3d2, d3d1, g1g2, g1f2, g1h1, f1g3, f1e3, f1d2, e1e6, e1e5, e1e4, e1e3, e1e2, e1d1, e1c1, e1b1, e1a1, f3f4, h2h3, c2c3, a2a3, h2h4, a2a4\nmove: e1e6\npuzzle_id: Csb0w\nrating: 1106\nthemes: ['crushing', 'master', 'middlegame', 'pin', 'short']\nposition_index: 1\n\nposition_fen: 4Qn1k/6p1/7p/3p2N1/8/3q4/1P3KPP/r3B3 w - - 2 30\nside_to_move: white\nlegal_moves_uci: e8f8, e8d8, e8c8, e8b8, e8a8, e8f7, e8e7, e8d7, e8g6, e8e6, e8c6, e8h5, e8e5, e8b5, e8e4, e8a4, e8e3, e8e2, g5h7, g5f7, g5e6, g5e4, g5h3, g5f3, f2g1, e1a5, e1b4, e1c3, e1d2, h2h3, g2g3, b2b3, h2h4, g2g4, b2b4\nmove: e8f8\npuzzle_id: vyvus\nrating: 1408\nthemes: ['endgame', 'fork', 'mate', 'mateIn2', 'short']\nposition_index: 1\n\nposition_fen: 8/5p2/3p1kp1/2pP1n1p/1pP1BP1P/pP3KP1/P7/8 b - - 4 36\nside_to_move: black\nlegal_moves_uci: f6g7, f6e7, f5g7, f5e7, f5h6, f5h4, f5d4, f5g3, f5e3, g6g5\nmove: f5d4\npuzzle_id: LqEkl\nrating: 1852\nthemes: ['crushing', 'endgame', 'short']\nposition_index: 0\n\nposition_fen: 3r2k1/p4p1p/2q1p1p1/2P5/8/1PQ2PP1/P5KP/3R4 b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8f8, d8f8, d8e8, d8c8, d8b8, d8a8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, c6e8, c6c8, c6a8, c6d7, c6c7, c6b7, c6d6, c6b6, c6a6, c6d5, c6c5, c6b5, c6e4, c6a4, c6f3, h7h6, f7f6, a7a6, g6g5, e6e5, h7h5, f7f5, a7a5\nmove: d8d1\npuzzle_id: DO7ZK\nrating: 2079\nthemes: ['crushing', 'endgame', 'veryLong']\nposition_index: 3\n\nposition_fen: 3Q4/p4N1p/4p1p1/5p2/P3k3/2q3PP/5P1K/2r5 w - - 3 38\nside_to_move: white\nlegal_moves_uci: d8h8, d8g8, d8f8, d8e8, d8c8, d8b8, d8a8, d8e7, d8d7, d8c7, d8f6, d8d6, d8b6, d8g5, d8d5, d8a5, d8h4, d8d4, d8d3, d8d2, d8d1, f7h8, f7h6, f7d6, f7g5, f7e5, h2g2, a4a5, h3h4, g3g4, f2f3, f2f4\nmove: f7g5\npuzzle_id: phdll\nrating: 1939\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 0\n\nposition_fen: 8/Q3B1pk/2p4p/8/5PKP/3q4/7P/8 b - - 2 44\nside_to_move: black\nlegal_moves_uci: h7h8, h7g8, h7g6, d3d8, d3d7, d3g6, d3d6, d3a6, d3f5, d3d5, d3b5, d3e4, d3d4, d3c4, d3h3, d3g3, d3f3, d3e3, d3c3, d3b3, d3a3, d3e2, d3d2, d3c2, d3f1, d3d1, d3b1, g7g6, h6h5, c6c5, g7g5\nmove: h6h5\npuzzle_id: 1EyJ6\nrating: 2739\nthemes: ['attraction', 'endgame', 'mate', 'mateIn4', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: r3r3/3qkp2/p6Q/2p1p3/3b2P1/4B1P1/PP3PK1/7R w - - 3 34\nside_to_move: white\nlegal_moves_uci: h6h8, h6f8, h6h7, h6g7, h6g6, h6f6, h6e6, h6d6, h6c6, h6b6, h6a6, h6h5, h6g5, h6h4, h6f4, h6h3, h6h2, e3g5, e3f4, e3d4, e3d2, e3c1, g2h3, g2f3, g2h2, g2g1, g2f1, h1h5, h1h4, h1h3, h1h2, h1g1, h1f1, h1e1, h1d1, h1c1, h1b1, h1a1, g4g5, f2f3, b2b3, a2a3, f2f4, b2b4, a2a4\nmove: e3g5\npuzzle_id: wUTyK\nrating: 2707\nthemes: ['dovetailMate', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 8/3k1p2/8/K5P1/1p4r1/3B4/PPP5/8 w - - 1 51\nside_to_move: white\nlegal_moves_uci: a5b6, a5a6, a5b5, a5a4, d3h7, d3g6, d3a6, d3f5, d3b5, d3e4, d3c4, d3e2, d3f1, g5g6, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: d3f5\npuzzle_id: erKak\nrating: 839\nthemes: ['crushing', 'endgame', 'fork', 'master', 'short']\nposition_index: 0\n\nposition_fen: 5rk1/p2pppbp/Q1p3p1/8/4NB2/8/qrP1BPPP/2KR3R b - - 0 18\nside_to_move: black\nlegal_moves_uci: g8h8, f8e8, f8d8, f8c8, f8b8, f8a8, g7h8, g7h6, g7f6, g7e5, g7d4, g7c3, b2b8, b2b7, b2b6, b2b5, b2b4, b2b3, b2c2, b2b1, a2e6, a2a6, a2d5, a2a5, a2c4, a2a4, a2b3, a2a3, a2b1, a2a1, h7h6, f7f6, e7e6, d7d6, g6g5, c6c5, h7h5, f7f5, e7e5, d7d5\nmove: b2c2\npuzzle_id: 4ZLiO\nrating: 1695\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove', 'queensideAttack']\nposition_index: 0\n\nposition_fen: r7/p1p3pk/3b3p/4N3/2PpP3/7q/PPQ2P2/R4RK1 b - - 0 27\nside_to_move: black\nlegal_moves_uci: a8h8, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, h7h8, h7g8, d6f8, d6e7, d6e5, d6c5, d6b4, d6a3, h3c8, h3d7, h3e6, h3h5, h3f5, h3h4, h3g4, h3g3, h3f3, h3e3, h3d3, h3c3, h3b3, h3a3, h3h2, h3g2, h3h1, h3f1, g7g6, c7c6, a7a6, h6h5, d4d3, g7g5, c7c5, a7a5\nmove: d6e5\npuzzle_id: qcwPi\nrating: 2416\nthemes: ['advantage', 'attraction', 'fork', 'middlegame', 'veryLong']\nposition_index: 1\n\nposition_fen: 5rk1/1b2bppp/ppr1p3/3qB3/3P2Q1/4P1nP/PP4PN/1B1R1RK1 b - - 4 22\nside_to_move: black\nlegal_moves_uci: g8h8, f8e8, f8d8, f8c8, f8b8, f8a8, e7d8, e7f6, e7d6, e7g5, e7c5, e7h4, e7b4, e7a3, b7c8, b7a8, c6c8, c6c7, c6d6, c6c5, c6c4, c6c3, c6c2, c6c1, d5d8, d5d7, d5d6, d5e5, d5c5, d5b5, d5a5, d5e4, d5d4, d5c4, d5f3, d5b3, d5g2, d5a2, g3h5, g3f5, g3e4, g3e2, g3h1, g3f1, h7h6, g7g6, f7f6, b6b5, a6a5, h7h5, g7g5, f7f5\nmove: d5g2\npuzzle_id: 5OnYn\nrating: 2183\nthemes: ['attraction', 'discoveredCheck', 'doubleCheck', 'kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: 4r1k1/bp3pp1/p1pB3p/8/1PPp4/P6P/2P2PP1/4R1K1 b - - 0 23\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, a7b8, a7b6, a7c5, g7g6, f7f6, b7b6, h6h5, c6c5, a6a5, d4d3, g7g5, f7f5, b7b5\nmove: e8e1\npuzzle_id: jR4S3\nrating: 553\nthemes: ['crushing', 'endgame', 'kingsideAttack', 'short']\nposition_index: 1\n\nposition_fen: 6r1/5k2/2p2b2/2p2P1K/2P5/5RN1/7P/8 b - - 6 45\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8e8, g8d8, g8c8, g8b8, g8a8, g8g7, g8g6, g8g5, g8g4, g8g3, f7f8, f7e8, f7g7, f7e7, f6h8, f6d8, f6g7, f6e7, f6g5, f6e5, f6h4, f6d4, f6c3, f6b2, f6a1\nmove: g8h8\npuzzle_id: LPIS0\nrating: 2432\nthemes: ['endgame', 'long', 'mate', 'mateIn3', 'operaMate']\nposition_index: 1","sha256":"4bf871c1f408c2b5a9304c7eadda25977729538f1912ee37b5e7b4e7866f9aa1","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/brs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: rn1qkb1r/pp2pppp/2p2n2/3p1b2/3P1B2/3BP3/PPP2PPP/RN1QK1NR w KQkq - 0 5\nside_to_move: white\nlegal_moves_uci: f4b8, f4c7, f4h6, f4d6, f4g5, f4e5, f4g3, d3a6, d3f5, d3b5, d3e4, d3c4, d3e2, d3f1, g1h3, g1f3, g1e2, e1e2, e1d2, e1f1, d1h5, d1g4, d1f3, d1e2, d1d2, d1c1, b1c3, b1a3, b1d2, e3e4, h2h3, g2g3, f2f3, c2c3, b2b3, a2a3, h2h4, g2g4, c2c4, b2b4, a2a4\nmove: d3f5\n\nposition_fen: 8/8/p1k1p2p/2p1Pp2/1P3KP1/1PP5/7P/8 b - - 0 38\nside_to_move: black\nlegal_moves_uci: c6d7, c6c7, c6b7, c6b6, c6d5, c6b5, f5g4, c5b4, h6h5, a6a5, c5c4\nmove: c5b4\n\nposition_fen: rn5k/ppp2Qp1/7p/8/3P2q1/2P4b/PP1N1P1K/R1B5 b - - 1 23\nside_to_move: black\nlegal_moves_uci: h8h7, b8d7, b8c6, b8a6, g4c8, g4d7, g4g6, g4e6, g4h5, g4g5, g4f5, g4h4, g4f4, g4e4, g4d4, g4g3, g4f3, g4g2, g4e2, g4g1, g4d1, h3g2, h3f1, g7g6, c7c6, b7b6, a7a6, h6h5, g7g5, c7c5, b7b5, a7a5\nmove: g4g2\n\nposition_fen: 2r3k1/5ppp/p2b1p2/3P4/8/3Q3P/1P3PP1/N5K1 b - - 0 28\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, c8f8, c8e8, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, c8c4, c8c3, c8c2, c8c1, d6f8, d6b8, d6e7, d6c7, d6e5, d6c5, d6f4, d6b4, d6g3, d6a3, d6h2, h7h6, g7g6, f6f5, a6a5, h7h5, g7g5\nmove: c8c1\n\nposition_fen: r1bQ4/pp3k1p/2pp2p1/3P4/2P3P1/3B1n1P/PPK2P2/4q2R w - - 2 23\nside_to_move: white\nlegal_moves_uci: d8h8, d8g8, d8f8, d8e8, d8c8, d8e7, d8d7, d8c7, d8f6, d8d6, d8b6, d8g5, d8a5, d8h4, d3g6, d3f5, d3e4, d3e2, d3f1, c2b3, h1h2, h1g1, h1f1, h1e1, d5c6, g4g5, c4c5, h3h4, b2b3, a2a3, b2b4, a2a4\nmove: h1e1\npuzzle_id: nG87C\nrating: 1454\nthemes: ['crushing', 'intermezzo', 'middlegame', 'short']\nposition_index: 1\n\nposition_fen: 8/8/7k/p1p1pKp1/3pP3/1P1P4/P1P5/8 b - - 3 37\nside_to_move: black\nlegal_moves_uci: h6h7, h6g7, h6h5, g5g4, c5c4, a5a4\nmove: h6h5\npuzzle_id: 57RiF\nrating: 2090\nthemes: ['crushing', 'endgame', 'pawnEndgame', 'quietMove', 'veryLong']\nposition_index: 2\n\nposition_fen: 2b2rkb/3p1p2/4pPp1/q1p1N1P1/1p1nQ3/1P6/rB1P1PB1/2KR3R w - - 4 21\nside_to_move: white\nlegal_moves_uci: e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, e4a8, e4b7, e4g6, e4c6, e4f5, e4d5, e4h4, e4g4, e4f4, e4d4, e4f3, e4e3, e4d3, e4e2, e4c2, e4e1, e4b1, g2h3, g2f3, g2f1, b2d4, b2c3, b2a3, b2a1, h1h8, h1h7, h1h6, h1h5, h1h4, h1h3, h1h2, h1g1, h1f1, h1e1, d1g1, d1f1, d1e1, c1b1, f2f3, d2d3, f2f4\nmove: h1h8\npuzzle_id: NXAep\nrating: 2247\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: r5k1/pp2q1p1/3b3P/4n3/8/PP5Q/1BPN1K2/R6R b - - 0 24\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8h7, g8f7, a8f8, a8e8, a8d8, a8c8, a8b8, e7f8, e7e8, e7d8, e7f7, e7d7, e7c7, e7f6, e7e6, e7g5, e7h4, d6b8, d6c7, d6c5, d6b4, d6a3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, g7h6, g7g6, b7b6, a7a6, g7g5, b7b5, a7a5\nmove: a8f8\npuzzle_id: y7SzX\nrating: 2278\nthemes: ['advantage', 'attraction', 'discoveredAttack', 'discoveredCheck', 'fork', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 8/1p6/p2R3p/2R3p1/b4k2/5P1P/r1n3PK/8 w - - 6 38\nside_to_move: white\nlegal_moves_uci: d6d8, d6d7, d6h6, d6g6, d6f6, d6e6, d6c6, d6b6, d6a6, d6d5, d6d4, d6d3, d6d2, d6d1, c5c8, c5c7, c5c6, c5g5, c5f5, c5e5, c5d5, c5b5, c5a5, c5c4, c5c3, c5c2, h2h1, h2g1, h3h4, g2g3, g2g4\nmove: d6e6\npuzzle_id: tUyWO\nrating: 2735\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 2\n\nposition_fen: 4n1Q1/1b4p1/p2k1q1p/3p1B2/5PP1/1PP5/PK5P/8 w - - 3 32\nside_to_move: white\nlegal_moves_uci: g8h8, g8f8, g8e8, g8h7, g8g7, g8f7, g8e6, g8d5, f5c8, f5h7, f5d7, f5g6, f5e6, f5e4, f5d3, f5c2, f5b1, b2a3, b2c2, b2c1, b2b1, b2a1, g4g5, b3b4, h2h3, a2a3, h2h4, a2a4\nmove: g8e8\npuzzle_id: stOQL\nrating: 990\nthemes: ['crushing', 'endgame', 'hangingPiece', 'oneMove']\nposition_index: 0\n\nposition_fen: 4r1k1/ppp2ppp/3r4/2P3qb/1P6/P2PnP2/3BB1PP/R1Q1R2K b - - 0 21\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, d6d8, d6d7, d6h6, d6g6, d6f6, d6e6, d6c6, d6b6, d6a6, d6d5, d6d4, d6d3, h5g6, h5g4, h5f3, g5d8, g5e7, g5h6, g5g6, g5f6, g5f5, g5e5, g5d5, g5c5, g5h4, g5g4, g5f4, g5g3, g5g2, e3f5, e3d5, e3g4, e3c4, e3g2, e3c2, e3f1, e3d1, h7h6, g7g6, f7f6, c7c6, b7b6, a7a6, f7f5, b7b5, a7a5\nmove: g5g2\npuzzle_id: hoDcA\nrating: 1206\nthemes: ['kingsideAttack', 'mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: QR6/5k2/1p3p2/6pp/8/6PK/r6P/8 b - - 0 40\nside_to_move: black\nlegal_moves_uci: f7g7, f7e7, f7g6, f7e6, a2a8, a2a7, a2a6, a2a5, a2a4, a2a3, a2h2, a2g2, a2f2, a2e2, a2d2, a2c2, a2b2, a2a1, f6f5, b6b5, h5h4, g5g4\nmove: g5g4\npuzzle_id: F96Cn\nrating: 990\nthemes: ['deflection', 'endgame', 'mate', 'mateIn2', 'queenRookEndgame', 'short']\nposition_index: 0\n\nposition_fen: 1r6/p1k3pQ/2pp4/2p1p1P1/4Pn2/2NP4/PPP2q2/2K4R b - - 4 25\nside_to_move: black\nlegal_moves_uci: b8h8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, c7d8, c7c8, c7d7, c7b7, c7b6, f4g6, f4e6, f4h5, f4d5, f4h3, f4d3, f4g2, f4e2, f2h4, f2d4, f2g3, f2f3, f2e3, f2h2, f2g2, f2e2, f2d2, f2c2, f2g1, f2f1, f2e1, a7a6, d6d5, c5c4, a7a5\nmove: f4d3\npuzzle_id: o5Xmz\nrating: 2039\nthemes: ['crushing', 'defensiveMove', 'endgame', 'fork', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/6nk/p3p2p/1b1pNp1N/1b1P1P1P/4q3/6PK/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h5g7, h5f6, h5g3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, h2h1, g2g3, g2g4\nmove: h5f6\npuzzle_id: saT5n\nrating: 2740\nthemes: ['long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 6k1/6pp/8/Q2Pp3/4Pn2/P7/3K1P1P/3B2q1 b - - 6 31\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8f7, f4g6, f4e6, f4h5, f4d5, f4h3, f4d3, f4g2, f4e2, g1g6, g1g5, g1g4, g1g3, g1h2, g1g2, g1f2, g1h1, g1f1, g1e1, g1d1, h7h6, g7g6, h7h5, g7g5\nmove: g1f2\npuzzle_id: ajhQg\nrating: 2434\nthemes: ['crushing', 'deflection', 'endgame', 'veryLong']\nposition_index: 3\n\nposition_fen: r3r1k1/pp1q4/n1pbbpN1/3p3Q/3P4/6P1/PPP1N1PP/R5K1 w - - 0 18\nside_to_move: white\nlegal_moves_uci: g6h8, g6f8, g6e7, g6e5, g6h4, g6f4, h5h8, h5h7, h5h6, h5g5, h5f5, h5e5, h5d5, h5h4, h5g4, h5h3, h5f3, e2f4, e2c3, e2c1, g1f2, g1h1, g1f1, a1f1, a1e1, a1d1, a1c1, a1b1, g3g4, h2h3, c2c3, b2b3, a2a3, h2h4, c2c4, b2b4, a2a4\nmove: h5h8\npuzzle_id: YaaA9\nrating: 2341\nthemes: ['kingsideAttack', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1","sha256":"622698785abf2c7e9854babd7ba9568618a0d4708dbc09e0f2229728df9c2bf4","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/brs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 3r4/6kp/4p3/1p6/8/1BP4q/PP4Q1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: g7h8, g7f8, g7f7, g7h6, g7f6, h3g4, h3g3, h3g2\nmove: h3g2\n\nposition_fen: 3Qqk2/5p1p/b5pP/p2pP3/1r1r2P1/5R2/5PK1/8 w - - 2 39\nside_to_move: white\nlegal_moves_uci: d8e8, d8c8, d8b8, d8a8, d8e7, d8d7, d8c7, d8f6, d8d6, d8b6, d8g5, d8d5, d8a5, d8h4, f3f7, f3f6, f3f5, f3f4, f3h3, f3g3, f3e3, f3d3, f3c3, f3b3, f3a3, g2h3, g2g3, g2h2, g2h1, g2g1, e5e6, g4g5\nmove: f3f7\npuzzle_id: AF0Pt\nrating: 2103\nthemes: ['attraction', 'endgame', 'fork', 'mate', 'mateIn4', 'pin', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 2Q5/2Bp1p1p/4p3/p1kp4/Pn3P2/1P6/3KR2P/1q3r2 w - - 17 31\nside_to_move: white\nlegal_moves_uci: c8h8, c8g8, c8f8, c8e8, c8d8, c8b8, c8a8, c8d7, c8b7, c8a6, c7d8, c7b8, c7d6, c7b6, c7e5, c7a5, e2e6, e2e5, e2e4, e2e3, e2g2, e2f2, e2e1, d2e3, d2c3, f4f5, h2h3, h2h4\nmove: c8f8\npuzzle_id: EHyEK\nrating: 2595\nthemes: ['endgame', 'mate', 'mateIn4', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/1pR5/p5kp/6p1/b7/5P1P/r1nR2PK/8 w - - 2 36\nside_to_move: white\nlegal_moves_uci: c7c8, c7h7, c7g7, c7f7, c7e7, c7d7, c7b7, c7c6, c7c5, c7c4, c7c3, c7c2, h2g3, h2h1, h2g1, d2d8, d2d7, d2d6, d2d5, d2d4, d2d3, d2f2, d2e2, d2c2, d2d1, h3h4, f3f4, g2g3, g2g4\nmove: d2d6\npuzzle_id: tUyWO\nrating: 2735\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 0\n\nposition_fen: 3r2k1/6Rp/4p3/1p6/8/1BP4q/PP4b1/5QK1 b - - 0 29\nside_to_move: black\nlegal_moves_uci: g8h8, g8g7\nmove: g8g7\npuzzle_id: TGkEy\nrating: 2191\nthemes: ['crushing', 'endgame', 'pin', 'veryLong']\nposition_index: 2\n\nposition_fen: 5r1r/ppqb2Q1/2nkp3/3nN3/3P4/P1B5/1P3PPP/R4RK1 w - - 5 20\nside_to_move: white\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h7, g7f7, g7e7, g7d7, g7h6, g7g6, g7f6, g7g5, g7g4, g7g3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, c3a5, c3b4, c3d2, c3e1, g1h1, f1e1, f1d1, f1c1, f1b1, a1a2, a1e1, a1d1, a1c1, a1b1, a3a4, h2h3, g2g3, f2f3, b2b3, h2h4, g2g4, f2f4, b2b4\nmove: e5c4\npuzzle_id: uGdbu\nrating: 1795\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: r1bq1r2/pp1n1pp1/2pQ4/8/3R2Pk/8/PPP5/2K5 w - - 0 26\nside_to_move: white\nlegal_moves_uci: d6f8, d6b8, d6e7, d6d7, d6c7, d6h6, d6g6, d6f6, d6e6, d6c6, d6e5, d6d5, d6c5, d6f4, d6b4, d6g3, d6a3, d6h2, d4d5, d4f4, d4e4, d4c4, d4b4, d4a4, d4d3, d4d2, d4d1, c1d2, c1d1, c1b1, g4g5, c2c3, b2b3, a2a3, c2c4, b2b4, a2a4\nmove: d6h2\npuzzle_id: Exzx9\nrating: 2701\nthemes: ['mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: r3r1k1/3q1p1n/p6Q/2p1p3/3b2P1/4B1P1/PP3PK1/7R w - - 0 32\nside_to_move: white\nlegal_moves_uci: h6f8, h6h7, h6g7, h6g6, h6f6, h6e6, h6d6, h6c6, h6b6, h6a6, h6h5, h6g5, h6h4, h6f4, h6h3, h6h2, e3g5, e3f4, e3d4, e3d2, e3c1, g2h3, g2f3, g2h2, g2g1, g2f1, h1h5, h1h4, h1h3, h1h2, h1g1, h1f1, h1e1, h1d1, h1c1, h1b1, h1a1, g4g5, f2f3, b2b3, a2a3, f2f4, b2b4, a2a4\nmove: h6h7\npuzzle_id: wUTyK\nrating: 2707\nthemes: ['dovetailMate', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/p4bk1/5p1p/P4p2/B3pN2/P7/2P2PPP/1r1R2K1 b - - 3 25\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h7, f7g8, f7e8, f7g6, f7e6, f7h5, f7d5, f7c4, f7b3, f7a2, b1b8, b1b7, b1b6, b1b5, b1b4, b1b3, b1b2, b1d1, b1c1, b1a1, a7a6, h6h5, e4e3\nmove: b1d1\npuzzle_id: fXffx\nrating: 448\nthemes: ['backRankMate', 'endgame', 'mate', 'mateIn2', 'short']\nposition_index: 1\n\nposition_fen: 8/r2k4/8/PK3p2/8/8/8/R7 w - - 9 53\nside_to_move: white\nlegal_moves_uci: b5b6, b5c5, b5c4, b5b4, b5a4, a1a4, a1a3, a1a2, a1h1, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, a5a6\nmove: b5b6\npuzzle_id: szH7t\nrating: 2615\nthemes: ['clearance', 'crushing', 'defensiveMove', 'endgame', 'rookEndgame', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/8/8/7P/5p2/8/4K1kP/8 b - - 0 52\nside_to_move: black\nlegal_moves_uci: g2h3, g2h2, g2h1, g2g1, f4f3\nmove: f4f3\npuzzle_id: ulmPp\nrating: 2799\nthemes: ['advancedPawn', 'crushing', 'endgame', 'exposedKing', 'pawnEndgame', 'quietMove', 'veryLong', 'zugzwang']\nposition_index: 3\n\nposition_fen: rn1qkb1r/pp2pppp/2p2n2/3p1b2/3P1B2/3BP3/PPP2PPP/RN1QK1NR w KQkq - 0 5\nside_to_move: white\nlegal_moves_uci: f4b8, f4c7, f4h6, f4d6, f4g5, f4e5, f4g3, d3a6, d3f5, d3b5, d3e4, d3c4, d3e2, d3f1, g1h3, g1f3, g1e2, e1e2, e1d2, e1f1, d1h5, d1g4, d1f3, d1e2, d1d2, d1c1, b1c3, b1a3, b1d2, e3e4, h2h3, g2g3, f2f3, c2c3, b2b3, a2a3, h2h4, g2g4, c2c4, b2b4, a2a4\nmove: d3f5\npuzzle_id: c8OsF\nrating: 895\nthemes: ['advantage', 'hangingPiece', 'oneMove', 'opening']\nposition_index: 0\n\nposition_fen: r4rk1/pp2q1p1/3b3P/4n3/8/PP5Q/1BPN1P2/R4K1R b - - 0 23\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8f7, f8e8, f8d8, f8c8, f8b8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, a8e8, a8d8, a8c8, a8b8, e7e8, e7d8, e7f7, e7d7, e7c7, e7f6, e7e6, e7g5, e7h4, d6b8, d6c7, d6c5, d6b4, d6a3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, g7h6, g7g6, b7b6, a7a6, g7g5, b7b5, a7a5\nmove: f8f2\npuzzle_id: y7SzX\nrating: 2278\nthemes: ['advantage', 'attraction', 'discoveredAttack', 'discoveredCheck', 'fork', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: 2k4r/1p2bpp1/pP1p2p1/2pPP3/5P2/2N2QK1/1P4R1/R1B2q2 b - - 0 24\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, h8h1, c8d8, c8b8, c8d7, e7f8, e7d8, e7f6, e7g5, e7h4, f1b5, f1c4, f1f3, f1d3, f1g2, f1f2, f1e2, f1h1, f1g1, f1e1, f1d1, f1c1, d6e5, f7f6, g6g5, a6a5, c5c4, f7f5\nmove: h8h3\npuzzle_id: b4yqE\nrating: 2626\nthemes: ['attraction', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 0\n\nposition_fen: 5krr/ppQb4/3P4/5q2/7p/2P5/PP5p/K5R1 w - - 0 37\nside_to_move: white\nlegal_moves_uci: c7d8, c7c8, c7b8, c7d7, c7b7, c7c6, c7b6, c7c5, c7a5, c7c4, g1g8, g1g7, g1g6, g1g5, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, g1c1, g1b1, c3c4, b2b3, a2a3, b2b4, a2a4\nmove: c7d8\npuzzle_id: xAoXK\nrating: 2578\nthemes: ['exposedKing', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: r2r2k1/ppp2p1p/5p2/5Q2/8/5P2/PPP3PP/1K1R1B1R b - - 0 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8g7, d8f8, d8e8, d8c8, d8b8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, a8c8, a8b8, h7h6, c7c6, b7b6, a7a6, h7h5, c7c5, b7b5, a7a5\nmove: d8d1\npuzzle_id: 33foZ\nrating: 512\nthemes: ['backRankMate', 'endgame', 'hangingPiece', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0","sha256":"dd31cd071833358d8590cb1bfb6f374427d3327da13205fdedc5d5cf5da17ed3","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/copro/42":{"text":"You are an expert chess analyst. Analyze the given chess position (provided in FEN notation or board state description) and determine the single best move for the player whose turn it is to move.\n\nTo find the optimal move:\n1. Identify whose turn it is (White or Black) and look for immediate tactical opportunities, such as checks, captures, pins, forks, or mating threats.\n2. Calculate candidate moves and their forced variations to ensure the selected move is the absolute strongest continuation.\n3. Provide the final move in Standard Algebraic Notation (SAN, e.g., Nf3, Bxh7+) or UCI format (e.g., e2e4).","sha256":"01029f199ef2683efef683857f2360382f6eaf78537b4fa7867e50d00e95d1db","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/copro/43":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/copro/44":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/gepa/42":{"text":"Your task is to solve the chess puzzle by finding the single best move for the active side. \n\nReview the inputs carefully and apply the following structured tactical analysis to find the correct move:\n\n### Inputs\n* **`position_fen`**: The current board position in Forsyth-Edwards Notation (FEN).\n* **`side_to_move`**: The side whose turn it is to make a move ('white' or 'black').\n* **`legal_moves_uci`**: The complete list of all legal moves available in Universal Chess Interface (UCI) format.\n\n### Tactical Calculation Methodology (Apply Rigorously)\nTo successfully solve the tactic, you must identify the move that leads to a forced, undeniable advantage (either winning material or forcing a checkmate). Do not play natural-looking developing, defensive, or \"hopeful\" attacking moves. You must calculate lines to their concrete end.\n\nFollow this hierarchical search pattern:\n\n1. **Prioritize Forcing Moves (Checks, Captures, Threats - CCT):**\n   * **Checks First:** Evaluate *every single legal move* that puts the opponent's king in check. Calculate the opponent's forced responses. Many tactics are solved by seemingly wild sacrifices (e.g., queen or rook sacrifices) that force a king into a mating net or a devastating fork.\n   * **Captures Second:** Examine all moves that capture opponent pieces. Calculate the subsequent material balance. Does the capture remove a key defender of an even more valuable square or piece?\n   * **Threats Third:** If no check or capture immediately wins, look for moves that create unavoidable, high-level threats (e.g., threatening mate-in-1, trapping a queen, or creating an unstoppable fork).\n\n2. **Assume Best Play (No \"Hope Chess\"):**\n   * For every candidate move you evaluate, identify the opponent's *strongest possible defense* or counter-attack. \n   * If the opponent has even one resource that escapes your trap, saves their piece, or allows them to counter-attack successfully, discard your candidate move and evaluate the next one.\n   * Avoid moves that \"look good\" (e.g., moving a queen close to the enemy king) but do not actually force a concession (such as capturing a pawn when a forcing check on the other side of the board wins a piece).\n\n3. **Verify against the Legal Moves List:**\n   * Your final selection **must** be present in the `legal_moves_uci` list. Double-check the exact spelling and coordinates of the move.\n\n### Output Format\nProvide **only** the single best move in UCI format (e.g., `e1g1`, `h3h7`). Do not include any commentary, explanations, search trees, or markdown formatting other than the raw move itself.","sha256":"ae3cdd996e0e15a875d8dda7ef98030ee18ae0c108559d306ebfdf2a3c950c8b","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/gepa/43":{"text":"You are an expert chess engine and tactical puzzle solver. Your task is to analyze the given chess position and select the single best move from the list of legal moves to solve the chess puzzle.\n\n### Inputs\n1. **position_fen**: The current state of the board in Forsyth-Edwards Notation (FEN).\n2. **side_to_move**: The color ('white' or 'black') whose turn it is to play.\n3. **legal_moves_uci**: A comma-separated list of all legally playable moves for the active side in UCI format.\n\n---\n\n### Advanced Tactical Calculation Protocol\nTo find the single winning move, you must systematically process the board state using this rigorous chess-calculation methodology:\n\n#### Step 1: Scan for Key Tactical Motifs (Board Vision)\n*   **Locate the Kings & Escape Squares**: Assess the safety of both kings. If attacking, map out the enemy king's potential flight squares. Note if it is restricted to a single file/rank or has access to open-board escape routes.\n*   **En Passant Target**: Check the FEN for an active en passant target square (e.g., `h6` in `8/.../8 w - h6`). In pawn endgames, en passant is highly critical and often the only way to create a winning passed pawn.\n*   **Identify Tactical Alignments**: Look for pieces on the same rank, file, or diagonal that can be subjected to pins, forks, skewers, or discovered attacks.\n\n#### Step 2: Deep Calculation of Forcing Lines (Checks, Captures, Threats)\nDo not choose a move simply because it is a check or a capture; you must calculate its consequences fully. Evaluate moves using this strict hierarchy:\n\n1.  **Double Checks & Immediate Mates**:\n    *   *Double Checks*: If a move delivers a double check (e.g., via a discovered check where both the moving piece and the line piece attack the king), calculate it first. Double checks are extremely powerful because they force a king move and cannot be blocked or captured.\n    *   *Mate in 1*: Scan all legal moves that deliver a check. If a mate-in-1 is legally available (e.g., `g4g3#`), **you must play it**. Do not play passive captures or slow moves when checkmate is on the board.\n2.  **Compare Forcing Checks (Mating Nets vs. King Escapes)**:\n    *   If multiple checks are available, compare where they force the enemy king to go.\n    *   **Rule**: Avoid checks that allow the enemy king to escape to a safer, more open part of the board (e.g., letting the king escape via `d7` to `c6`). \n    *   **Rule**: Prioritize checks that force the king into more restricted, boxed-in squares (e.g., forcing it to the back rank `d8` where it can be systematically mated).\n3.  **Captures of Material & Tactical Breakthroughs**:\n    *   Identify all legal captures. Calculate if a capture wins material directly or triggers a forcing tactical line.\n    *   In pawn endgames, prioritize captures (especially en passant) that create a passed pawn that the enemy king is too far away to stop.\n\n#### Step 3: Endgame-Specific Evaluation\n*   **Pawn Endgames**: Do not blindly push pawns forward if it leaves other vital defending pawns hanging (e.g., do not push `g5g6` if it permits the opponent's king to capture your key pawn on `f6`). \n*   Always calculate the \"square of the pawn\" to ensure your passed pawn cannot be caught, or that you can successfully promote.\n\n#### Step 4: Strict Blunder Prevention & Sanity Filter\nBefore finalizing your move, pass it through this filter to avoid common tactical blindspots:\n\n*   **The \"Greed vs. Mate\" Filter**: Never settle for capturing an active piece (like a knight or rook) if there is an immediate forced checkmate or a devastating mating net on the board.\n*   **The Hanging Piece/Pawn Check**: Ensure your move does not defend one square while completely hanging a vital piece or pawn elsewhere for free.\n*   **The Queen/Piece Blunder Filter**: Never play a move that voluntarily places your queen or other high-value piece on an attacked square where it can be captured for free, unless it leads to a forced, calculated checkmate.\n\n---\n\n### Output Format\nYour output must contain only the header `### move` followed by the chosen UCI move on the next line. Do not include any other conversational filler or explanation.\n\nExample Output:\n### move\ne2e4","sha256":"b7d509065ef8e85a4c734db4f36ed0b622a2e7420140696d97a0bca293299802","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/gepa/44":{"text":"You are an expert chess grandmaster and tactical puzzle solver. Your task is to find the single best move in a given chess position that solves the tactical puzzle.\n\n### Inputs Provided:\n1. `position_fen`: The chess board position in FEN (Forsyth-Edwards Notation) format.\n2. `side_to_move`: The color of the player whose turn it is to move ('white' or 'black').\n3. `legal_moves_uci`: A comma-separated list of all legal moves for the active side, formatted in UCI (Universal Chess Interface) notation (e.g., `e2e4`, `g8f6`).\n\n### Tactical Search & Decision-Making Strategy:\nChess puzzles always have a forced tactical sequence that leads to a decisive advantage (checkmate, major material gain, or forcing a draw in a lost position). To find the correct move, you must follow the **Forcing Moves Principle (Checks, Captures, Threats)**:\n\n1. **Analyze the King Safety & Board State:**\n   - Locate both kings. Look for weaknesses in the opponent's king safety (e.g., trapped king, weak back rank, lack of defenders).\n   - Identify hanging (unprotected) pieces, pins, skewers, and aligned pieces that can be exploited.\n\n2. **Prioritize Candidate Moves (in this strict order):**\n   - **Checks:** Calculate every legal check first. Checkmate is the ultimate goal. For example, if there is a checkmate in one (like `h3h2` capturing a pawn on h2 to mate), prioritize it immediately over normal captures.\n   - **Captures:** Look at every possible capture. Does it win material, remove a key defender, or open lines of attack?\n   - **Threats / Forcing Moves:** Look for moves that create unavoidable threats of checkmate or massive material loss on the very next turn.\n\n3. **Calculate the Opponent's Forced Replies:**\n   - Do not just look at your move; calculate the opponent's absolute best response to your candidate move. \n   - Ensure your chosen move does not allow the opponent to escape, defend, or counter-attack effectively.\n   - Avoid \"quiet\" or slow defensive moves unless there are absolutely no forcing tactical options available.\n\n4. **Select the Move:**\n   - From the `legal_moves_uci` list, identify the single move that initiates the winning tactic.\n\n### Output Format:\nYour output must contain only the selected move from the `legal_moves_uci` list, with no additional text, explanation, or markdown formatting outside of the specified output key.\n\nExample Output:\ne2e4","sha256":"fdfd5080244344856cb42a97626d0f43f6348c20fce6d522bf44b6146ab69e69","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/miprov2/42":{"text":"You are a world-class chess grandmaster competing in a high-stakes championship where your life and reputation are on the line. Examine the provided board position in FEN format and the player to move, then analyze the list of legal UCI moves. You must select the single absolute best tactical move to win the game. Output only the selected move from the legal list in SAN or UCI format with no additional text, reasoning, or formatting.\n\nposition_fen: 6k1/pp3qbp/2p5/2N2p2/1PPp1P2/2Q5/P5PP/3R1K2 b - - 0 31\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g7h8, g7f8, g7h6, g7f6, g7e5, f7f8, f7e8, f7e7, f7d7, f7c7, f7g6, f7f6, f7e6, f7h5, f7d5, f7c4, d4c3, h7h6, b7b6, a7a6, d4d3, h7h5, b7b5, a7a5\nmove: d4c3\n\nposition_fen: 5r1k/6pp/p7/q1p1p3/4P3/2PP3P/1P4P1/5R1K w - - 0 36\nside_to_move: white\nlegal_moves_uci: h1h2, h1g1, f1f8, f1f7, f1f6, f1f5, f1f4, f1f3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h3h4, d3d4, c3c4, g2g3, b2b3, g2g4, b2b4\nmove: f1f8\npuzzle_id: 3Wuv0\nrating: 592\nthemes: ['backRankMate', 'endgame', 'mate', 'mateIn2', 'queenRookEndgame', 'short']\nposition_index: 1\n\nposition_fen: r7/ppp3QR/1nkp4/4p3/4P1P1/8/PPP5/1K1N1q2 b - - 11 30\nside_to_move: black\nlegal_moves_uci: a8h8, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, c6c5, c6b5, b6c8, b6d7, b6d5, b6c4, b6a4, f1f8, f1f7, f1f6, f1a6, f1f5, f1b5, f1f4, f1c4, f1h3, f1f3, f1d3, f1g2, f1f2, f1e2, f1h1, f1g1, f1e1, f1d1, a7a6, d6d5, a7a5\nmove: f1d1\npuzzle_id: yFV7C\nrating: 2435\nthemes: ['endgame', 'long', 'mate', 'mateIn3', 'queensideAttack']\nposition_index: 2\n\nposition_fen: 8/5R2/p1p2r1p/Pp6/2pP1k1P/2P2P2/5K2/8 w - - 11 48\nside_to_move: white\nlegal_moves_uci: f7f8, f7h7, f7g7, f7e7, f7d7, f7c7, f7b7, f7a7, f7f6, f2g2, f2e2, f2g1, f2f1, f2e1, h4h5, d4d5\nmove: f7f6\npuzzle_id: VquEx\nrating: 459\nthemes: ['endgame', 'hangingPiece', 'master', 'mate', 'mateIn1', 'oneMove', 'rookEndgame']\nposition_index: 0","sha256":"7f9dace28a717b68feaa2a8dcd363b09804ac6b1124f86e2b1fd47323e7134fc","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/miprov2/43":{"text":"You are a chess expert. Given the current board state in FEN format and the side to move, analyze the position to find the single best tactical move. Select your move from the provided list of legal UCI moves. Output ONLY the exact chosen UCI move, without any explanation, labels, or extra text.\n\nposition_fen: r1rR2k1/1b3pp1/5n1p/2p1p3/1p2P3/1B3P1P/NPP3P1/3R2K1 b - - 2 23\nside_to_move: black\nlegal_moves_uci: g8h7, c8d8, f6e8\nmove: c8d8\n\nposition_fen: 8/6pp/8/p1k5/1pP1p3/1P2K1P1/5P1P/8 b - - 0 48\nside_to_move: black\nlegal_moves_uci: c5d6, c5c6, c5b6, h7h6, g7g6, a5a4, h7h5, g7g5\nmove: a5a4\n\nposition_fen: 8/R5pk/7p/2pB4/2P2p2/3Pb2P/1rK3P1/8 w - - 0 40\nside_to_move: white\nlegal_moves_uci: c2c3, c2b2, c2d1\nmove: c2b2\n\nposition_fen: r1bR1r1k/p1p3pp/1bp5/8/8/5N2/PP3PPP/RN4K1 w - - 2 17\nside_to_move: white\nlegal_moves_uci: d8f8, d8e8, d8c8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, f3g5, f3e5, f3h4, f3d4, f3d2, f3e1, g1h1, g1f1, b1c3, b1a3, b1d2, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: d8f8\npuzzle_id: 5e4pq\nrating: 1021\nthemes: ['backRankMate', 'mate', 'mateIn2', 'middlegame', 'short']\nposition_index: 1","sha256":"9f0433922451c0448dc2ee4b66d36752bf09ebe18d3994213b19cd81884a2525","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/miprov2/44":{"text":"You are playing in the finals of a high-stakes, high-security chess tournament where a single mistake will lead to immediate elimination and severe consequences. Given the current board position (FEN), the side to move, and a list of legal moves in UCI format, you must find the single best move to solve this chess puzzle. Choose the optimal move and output it exactly, with no additional explanation, reasoning, or text.\n\nposition_fen: 1r3rk1/2q2pp1/p7/6Nn/2pPQ3/P1P4K/1PR5/5R2 b - - 0 36\nside_to_move: black\nlegal_moves_uci: g8h8, f8e8, f8d8, f8c8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, c7d8, c7c8, c7e7, c7d7, c7b7, c7a7, c7d6, c7c6, c7b6, c7e5, c7c5, c7a5, c7f4, c7g3, c7h2, h5f6, h5f4, h5g3, g7g6, f7f6, a6a5, f7f5\nmove: c7g3\n\nposition_fen: 3r3k/6pp/p7/q1p1p3/4P3/2PP1R1P/1P4P1/5R1K w - - 0 35\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3f6, f3f5, f3f4, f3g3, f3e3, f3f2, h1h2, h1g1, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h3h4, d3d4, c3c4, g2g3, b2b3, g2g4, b2b4\nmove: f3f8\n\nposition_fen: 4r1k1/p1p5/8/2NRr1pp/2P1K3/1P6/P7/8 w - - 0 42\nside_to_move: white\nlegal_moves_uci: e4d4, e4f3, e4d3, d5e5\nmove: d5e5\n\nposition_fen: r1bq1rk1/1p1nBpp1/p2pp2p/8/8/2nB1N2/PPP2PPP/R2Q1RK1 w - - 0 13\nside_to_move: white\nlegal_moves_uci: e7f8, e7d8, e7f6, e7d6, e7g5, e7h4, f3g5, f3e5, f3h4, f3d4, f3d2, f3e1, d3h7, d3g6, d3a6, d3f5, d3b5, d3e4, d3c4, d3e2, g1h1, f1e1, d1e2, d1d2, d1e1, d1c1, d1b1, a1c1, a1b1, b2c3, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: d3h7\npuzzle_id: th4zQ\nrating: 2535\nthemes: ['advantage', 'discoveredAttack', 'master', 'opening', 'veryLong']\nposition_index: 1","sha256":"5340e9c51017891622e758dd2638c6e3298e08b307528ba6ce9a6107e5152b05","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/simba/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nWhen choosing a move, always check for direct threats and undefended pieces of your own, particularly when files are open and rooks are facing each other (e.g., Black rook on d8 and White rook on d2). Do not make captures elsewhere (like `e8b5`) if it leaves a major piece hanging. If your own rook/piece is undefended and under attack, prioritize forcing moves such as trading/capturing the attacking piece (e.g., `d8d2`) to neutralize the threat.\n\nposition_fen: r2q2rk/5ppp/p1p1pb2/3pQ3/3P4/2N4R/PPP2PPP/4R1K1 w - - 1 20\nside_to_move: white\nlegal_moves_uci: e5b8, e5c7, e5f6, e5e6, e5d6, e5h5, e5g5, e5f5, e5d5, e5f4, e5e4, e5g3, e5e3, e5e2, h3h7, h3h6, h3h5, h3h4, h3g3, h3f3, h3e3, h3d3, c3d5, c3b5, c3e4, c3a4, c3e2, c3d1, c3b1, g1h1, g1f1, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, e1a1, g2g3, f2f3, b2b3, a2a3, g2g4, f2f4, b2b4, a2a4\nmove: h3h7","sha256":"cb7fde86fae364e53cdbdb08b216c787aa95d20288f96fadc444e1f2e58f936f","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/simba/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nWhen evaluating potential winning moves or checks, prioritize the most forcing move that results in an immediate checkmate (mate in 1). Carefully verify the protection of your attacking piece (e.g., ensuring the queen on g1 is defended by the rook on a1) and confirm that the opponent has absolutely no legal escapes, blocks, or captures, rather than choosing an alternative check (like b1h1) that does not immediately end the game.\n\nposition_fen: 5rk1/6p1/6Qp/3pN3/P7/2PB2qb/8/3RR2K b - - 3 33\nside_to_move: black\nlegal_moves_uci: g8h8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, f8f1, h3c8, h3d7, h3e6, h3f5, h3g4, h3g2, h3f1, g3g6, g3g5, g3e5, g3h4, g3g4, g3f4, g3f3, g3e3, g3d3, g3h2, g3g2, g3f2, g3g1, g3e1, h6h5, d5d4\nmove: h3g2\n\nposition_fen: 8/3k2pp/1K2pp2/p1P5/8/5P2/7P/8 w - - 1 36\nside_to_move: white\nlegal_moves_uci: b6b7, b6a7, b6a6, b6b5, b6a5, c5c6, f3f4, h2h3, h2h4\nmove: b6b7","sha256":"072adca37dee454e0316f2dcb7b51e65e9f1f036de426a65167b40fd0af1f872","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/deepseek-v4-pro-0813/simba/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nWhen solving chess endgame puzzles (particularly Bishop and Pawn endgames), prioritize moves that actively capture advanced opponent pawns (e.g., `f6e5` to break pawn chains) or block passed pawns. Avoid passive king moves (such as `f4e3`) that step away from the key area of pawn tension, as they typically allow the opponent's pawns to advance unchallenged to promotion.\n\nWhen evaluating legal moves, always prioritize immediate forcing moves, such as captures of high-value pieces (especially the opponent's Queen) and checks, over passive or defensive maneuvers. If a capture like `f4e5` is legal and attacks a critical piece or the king directly, calculate its consequences first, as it often leads to immediate material gain or checkmate.\n\nWhen evaluating potential moves, prioritize direct checks (especially with rooks on open files to the 7th rank, or queens) that immediately force the opponent's king to move, over non-checking queen placements or quiet attacking moves (like `h8f6`). Always calculate the forcing lines resulting from a check like `g1g7+` first, as they often lead to rapid checkmates or decisive material gain when the enemy king is already exposed.","sha256":"8a902c5c0eacfb594487225913c549bc0c799176a98e1a0d9653305af3d2ea39","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/bfs/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 2r2r2/5p1k/pp2p1pb/2p1P1Bp/q2P3Q/2P3R1/1P4PP/5RK1 w - - 0 29\nside_to_move: white\nlegal_moves_uci: g5d8, g5e7, g5h6, g5f6, g5f4, g5e3, g5d2, g5c1, h4h5, h4g4, h4f4, h4e4, h4h3, g3g4, g3h3, g3f3, g3e3, g3d3, g1f2, g1h1, f1f7, f1f6, f1f5, f1f4, f1f3, f1f2, f1e1, f1d1, f1c1, f1b1, f1a1, d4c5, d4d5, c3c4, h2h3, b2b3, b2b4\nmove: g5h6\n\nposition_fen: 3r2k1/5pp1/2p4p/3b2N1/1pq5/4Q2P/PP2RPP1/7K w - - 0 31\nside_to_move: white\nlegal_moves_uci: g5h7, g5f7, g5e6, g5e4, g5f3, e3e8, e3e7, e3a7, e3e6, e3b6, e3e5, e3c5, e3f4, e3e4, e3d4, e3g3, e3f3, e3d3, e3c3, e3b3, e3a3, e3d2, e3c1, e2d2, e2c2, e2e1, h1h2, h1g1, h3h4, f2f3, b2b3, a2a3, f2f4, a2a4\nmove: e3e8\n\nposition_fen: 4r1k1/5pp1/2p4p/3b2N1/1pq5/7P/PP2RPP1/7K w - - 0 32\nside_to_move: white\nlegal_moves_uci: g5h7, g5f7, g5e6, g5e4, g5f3, e2e8, e2e7, e2e6, e2e5, e2e4, e2e3, e2d2, e2c2, e2e1, h1h2, h1g1, h3h4, f2f3, b2b3, a2a3, f2f4, a2a4\nmove: e2e8\n\nposition_fen: 8/2k2p2/8/K4BP1/1p4r1/8/PPP5/8 w - - 3 52\nside_to_move: white\nlegal_moves_uci: f5c8, f5h7, f5d7, f5g6, f5e6, f5g4, f5e4, f5d3, a5a6, a5b5, a5a4, g5g6, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: f5g4\n\nposition_fen: 7r/5k2/2p2b2/2p2P2/2P3K1/5RN1/7P/8 b - - 8 46\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, f7g8, f7f8, f7e8, f7g7, f7e7, f6d8, f6g7, f6e7, f6g5, f6e5, f6h4, f6d4, f6c3, f6b2, f6a1\nmove: h8h4\npuzzle_id: LPIS0\nrating: 2432\nthemes: ['endgame', 'long', 'mate', 'mateIn3', 'operaMate']\nposition_index: 2\n\nposition_fen: r6R/pq1k1p2/1p2b1p1/3P1pb1/6p1/BP1Q2P1/P1B2PK1/8 w - - 5 30\nside_to_move: white\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, h8h1, d3a6, d3f5, d3b5, d3e4, d3d4, d3c4, d3f3, d3e3, d3c3, d3e2, d3d2, d3f1, d3d1, a3f8, a3e7, a3d6, a3c5, a3b4, a3b2, a3c1, g2h2, g2h1, g2g1, g2f1, c2d1, c2b1, b3b4, f2f3, f2f4\nmove: d3b5\npuzzle_id: FZqMM\nrating: 2222\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 6k1/1p1P1p2/4p1p1/P1Rp3p/1P3P2/2Q3KP/6P1/3q2b1 b - - 2 34\nside_to_move: black\nlegal_moves_uci: g8f8, g8h7, g1c5, g1d4, g1e3, g1h2, g1f2, d1g4, d1d4, d1a4, d1f3, d1d3, d1b3, d1e2, d1d2, d1c2, d1f1, d1e1, d1c1, d1b1, d1a1, f7f6, b7b6, g6g5, e6e5, h5h4, d5d4, f7f5, b7b5\nmove: h5h4\npuzzle_id: tyHzQ\nrating: 2434\nthemes: ['attraction', 'endgame', 'fork', 'mate', 'mateIn5', 'veryLong']\nposition_index: 1\n\nposition_fen: 1r3r1k/5ppB/p7/6P1/1p1p1q1Q/6N1/PPP5/1K1b4 w - - 0 31\nside_to_move: white\nlegal_moves_uci: h7g8, h7g6, h7f5, h7e4, h7d3, h4h6, h4h5, h4g4, h4f4, h4h3, h4h2, h4h1, g3h5, g3f5, g3e4, g3e2, g3h1, g3f1, b1a1, g5g6, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: h4f4\npuzzle_id: 4dQTV\nrating: 2685\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: 3k4/7r/1b4B1/8/4pnP1/8/5R2/2R3K1 b - - 15 57\nside_to_move: black\nlegal_moves_uci: d8e7, d8d7, h7h8, h7g7, h7f7, h7e7, h7d7, h7c7, h7b7, h7a7, h7h6, h7h5, h7h4, h7h3, h7h2, h7h1, b6c7, b6a7, b6c5, b6a5, b6d4, b6e3, b6f2, f4g6, f4e6, f4h5, f4d5, f4h3, f4d3, f4g2, f4e2, e4e3\nmove: f4g6\npuzzle_id: 4WNM9\nrating: 2668\nthemes: ['crushing', 'endgame', 'exposedKing', 'master', 'pin', 'veryLong']\nposition_index: 1\n\nposition_fen: 5rk1/p4p2/3Q2p1/5q1p/6P1/5P1K/7P/4R2R b - - 0 35\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8g7, f8e8, f8d8, f8c8, f8b8, f8a8, f5c8, f5d7, f5f6, f5e6, f5g5, f5e5, f5d5, f5c5, f5b5, f5a5, f5g4, f5f4, f5e4, f5f3, f5d3, f5c2, f5b1, h5g4, f7f6, a7a6, g6g5, h5h4, a7a5\nmove: f5f3\npuzzle_id: 6ziXy\nrating: 2213\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: r7/5k2/pp1p1ppp/2pP4/2P2q2/2PB3Q/P1K5/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h3c8, h3d7, h3h6, h3e6, h3h5, h3f5, h3h4, h3g4, h3g3, h3f3, h3e3, h3h2, h3g2, h3h1, h3f1, d3g6, d3f5, d3e4, d3e2, d3f1, c2b3, c2b2, c2d1, c2b1, a2a3, a2a4\nmove: h3d7\npuzzle_id: 5nfOl\nrating: 2156\nthemes: ['attraction', 'crushing', 'deflection', 'endgame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 4r1k1/rp3ppp/p7/P2N4/3P1q2/QP1np2P/2R2PP1/1N3K1R b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, a7a8, f4b8, f4c7, f4h6, f4f6, f4d6, f4g5, f4f5, f4e5, f4h4, f4g4, f4e4, f4d4, f4g3, f4f3, f4h2, f4f2, d3e5, d3c5, d3b4, d3f2, d3b2, d3e1, d3c1, e3f2, h7h6, g7g6, f7f6, b7b6, e3e2, h7h5, g7g5, f7f5, b7b5\nmove: e3e2\npuzzle_id: 3Mg46\nrating: 2418\nthemes: ['advancedPawn', 'long', 'master', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 0\n\nposition_fen: r1bq2n1/2pp1k2/p1n3p1/1p6/1b1PP3/2Q5/PPP2PPP/RNB2RK1 b - - 2 13\nside_to_move: black\nlegal_moves_uci: g8e7, g8h6, g8f6, d8f8, d8e8, d8e7, d8f6, d8g5, d8h4, c8b7, a8b8, a8a7, f7f8, f7e8, f7g7, f7e7, f7f6, f7e6, c6b8, c6e7, c6a7, c6e5, c6a5, c6d4, b4f8, b4e7, b4d6, b4c5, b4a5, b4c3, b4a3, d7d6, g6g5, a6a5, d7d5\nmove: b4c3\npuzzle_id: bdN9t\nrating: 1091\nthemes: ['crushing', 'master', 'opening', 'pin', 'short']\nposition_index: 1\n\nposition_fen: r4r2/5p1k/p2p4/q3nN2/1p4Q1/8/PPP5/2K2nN1 w - - 2 29\nside_to_move: white\nlegal_moves_uci: f5g7, f5e7, f5h6, f5d6, f5h4, f5d4, f5g3, f5e3, g4g8, g4g7, g4g6, g4h5, g4g5, g4h4, g4f4, g4e4, g4d4, g4c4, g4b4, g4h3, g4g3, g4f3, g4g2, g4e2, g4d1, g1h3, g1f3, g1e2, c1d1, c1b1, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: g4g7\npuzzle_id: GJCXh\nrating: 2676\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'veryLong']\nposition_index: 4\n\nposition_fen: r2r2kb/pp2pp1p/2q2npB/4p3/8/2N5/PPPQ1PPP/3R1RK1 w - - 0 15\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, h6g5, h6f4, h6e3, c3d5, c3b5, c3e4, c3a4, c3e2, c3b1, d2d8, d2d7, d2d6, d2g5, d2d5, d2f4, d2d4, d2e3, d2d3, d2e2, d2e1, d2c1, g1h1, f1e1, d1e1, d1c1, d1b1, d1a1, h2h3, g2g3, f2f3, b2b3, a2a3, h2h4, g2g4, f2f4, b2b4, a2a4\nmove: d2d8\npuzzle_id: XLka2\nrating: 640\nthemes: ['crushing', 'kingsideAttack', 'middlegame', 'short']\nposition_index: 0","sha256":"ee436d848f3bac97879cc32b60a9412f1f8ca79484632ddb6dd764a485310105","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/bfs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 6k1/pp6/2p5/3p4/3P2p1/P3P1P1/1P3K2/8 w - - 0 34\nside_to_move: white\nlegal_moves_uci: f2g2, f2e2, f2g1, f2f1, f2e1, e3e4, a3a4, b2b3, b2b4\nmove: e3e4\n\nposition_fen: 8/8/7p/5p2/8/4K1P1/6kP/8 b - - 6 49\nside_to_move: black\nlegal_moves_uci: g2h3, g2h2, g2h1, g2g1, g2f1, h6h5, f5f4\nmove: h6h5\n\nposition_fen: 8/8/8/5p1p/8/6P1/4K1kP/8 b - - 1 50\nside_to_move: black\nlegal_moves_uci: g2h3, g2h2, g2h1, g2g1, h5h4, f5f4\nmove: h5h4\n\nposition_fen: 8/8/8/5p2/7P/8/4K1kP/8 b - - 0 51\nside_to_move: black\nlegal_moves_uci: g2h3, g2h2, g2h1, g2g1, f5f4\nmove: f5f4\n\nposition_fen: 3r4/5k2/8/1p2PKp1/pP1N2P1/6p1/1P4P1/8 w - - 4 33\nside_to_move: white\nlegal_moves_uci: f5g5, f5e4, d4e6, d4c6, d4b5, d4f3, d4b3, d4e2, d4c2, e5e6, b2b3\nmove: e5e6\npuzzle_id: 5eBes\nrating: 2381\nthemes: ['crushing', 'endgame', 'veryLong', 'zugzwang']\nposition_index: 0\n\nposition_fen: 5rkr/pp2q1p1/4n1Q1/3nPR1p/4N3/8/PP4PP/5R1K w - - 8 24\nside_to_move: white\nlegal_moves_uci: g6e8, g6h7, g6g7, g6f7, g6h6, g6f6, g6e6, g6h5, g6g5, g6g4, g6g3, f5f8, f5f7, f5f6, f5h5, f5g5, f5f4, f5f3, f5f2, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h1g1, f1f4, f1f3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: g6e6\npuzzle_id: 4uOji\nrating: 2195\nthemes: ['crushing', 'deflection', 'fork', 'master', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: Rn4k1/6pp/3p4/1B1Pq3/1PN1n3/7P/2P2RK1/3Q4 b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e5e8, e5e7, e5f6, e5e6, e5h5, e5g5, e5f5, e5d5, e5f4, e5d4, e5g3, e5c3, e5h2, e5b2, e5a1, e4f6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h7h6, g7g6, h7h5, g7g5\nmove: e5g3\npuzzle_id: u5Z6U\nrating: 2563\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: 8/6nk/p3p2p/1b1pNp1N/1b1P1P1P/4q3/6PK/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h5g7, h5f6, h5g3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, h2h1, g2g3, g2g4\nmove: h5f6\npuzzle_id: saT5n\nrating: 2740\nthemes: ['long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 7r/5pk1/3p1P2/1p4q1/3p4/PQ1B4/1P3p2/5K1R b - - 0 46\nside_to_move: black\nlegal_moves_uci: g7g8, g7f8, g7f6, g5f6\nmove: g7f6\npuzzle_id: xAiWS\nrating: 2314\nthemes: ['advantage', 'endgame', 'exposedKing', 'long', 'skewer']\nposition_index: 0\n\nposition_fen: 7k/p5pp/3p4/2p1p3/2P3q1/1PQ2rP1/P4n1P/2B1KR2 w - - 0 28\nside_to_move: white\nlegal_moves_uci: c3e5, c3a5, c3d4, c3b4, c3f3, c3e3, c3d3, c3d2, c3c2, c3b2, c3a1, f1f2, f1h1, f1g1, e1e2, e1d2, c1h6, c1g5, c1f4, c1e3, c1a3, c1d2, c1b2, b3b4, h2h3, a2a3, h2h4, a2a4\nmove: f1f2\npuzzle_id: KXgrS\nrating: 2165\nthemes: ['advantage', 'long', 'middlegame']\nposition_index: 2\n\nposition_fen: 6n1/1p4Pk/2p1N2P/p5K1/8/8/8/8 w - - 1 53\nside_to_move: white\nlegal_moves_uci: e6f8, e6d8, e6c7, e6c5, e6f4, e6d4, g5h5, g5f5, g5h4, g5g4, g5f4\nmove: e6f8\npuzzle_id: mZF9a\nrating: 513\nthemes: ['endgame', 'knightEndgame', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0\n\nposition_fen: 4rr2/p7/1p3k1p/2p1Rp2/6p1/P7/1P3PPP/4RK2 w - - 5 26\nside_to_move: white\nlegal_moves_uci: e5e8, e5e7, e5e6, e5f5, e5d5, e5c5, e5e4, e5e3, e5e2, f1e2, f1g1, e1e4, e1e3, e1e2, e1d1, e1c1, e1b1, e1a1, a3a4, h2h3, g2g3, f2f3, b2b3, h2h4, f2f4, b2b4\nmove: e5e8\npuzzle_id: vOxk6\nrating: 939\nthemes: ['crushing', 'endgame', 'rookEndgame', 'short']\nposition_index: 0\n\nposition_fen: 1r5k/p5p1/6Pp/Q6P/8/8/P4P2/KR1r4 b - - 2 40\nside_to_move: black\nlegal_moves_uci: h8g8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1h1, d1g1, d1f1, d1e1, d1c1, d1b1, a7a6\nmove: d1b1\npuzzle_id: TMIoF\nrating: 1117\nthemes: ['endgame', 'mate', 'mateIn2', 'queenRookEndgame', 'short']\nposition_index: 1\n\nposition_fen: 1R6/4k3/7r/2p3K1/4p3/8/8/8 w - - 0 53\nside_to_move: white\nlegal_moves_uci: b8h8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, g5h6, g5f5, g5g4, g5f4\nmove: g5h6\npuzzle_id: 0ErLd\nrating: 2296\nthemes: ['crushing', 'endgame', 'exposedKing', 'rookEndgame', 'veryLong']\nposition_index: 3\n\nposition_fen: Q2qkb1r/p2bpppp/8/1B1P4/4nB2/4PK2/PP1p1PPP/n5NR w k - 1 16\nside_to_move: white\nlegal_moves_uci: a8d8, a8c8, a8b8, a8b7, a8a7, a8c6, b5d7, b5c6, b5a6, b5c4, b5a4, b5d3, b5e2, b5f1, f4b8, f4c7, f4h6, f4d6, f4g5, f4e5, f4g3, f3e4, f3e2, g1h3, g1e2, d5d6, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: b5d7\npuzzle_id: lQxX8\nrating: 2532\nthemes: ['attraction', 'clearance', 'fork', 'mate', 'mateIn5', 'middlegame', 'pin', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: 1k6/1P6/1K6/6B1/6P1/8/8/4q3 w - - 0 56\nside_to_move: white\nlegal_moves_uci: b6c6, b6a6, b6c5, b6b5, g5d8, g5e7, g5h6, g5f6, g5h4, g5f4, g5e3, g5d2, g5c1\nmove: g5f4\npuzzle_id: Nx8za\nrating: 836\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 0","sha256":"e5d4e6e627c6a696d9305f50f560f7a82bf3203bc57228e2b1fc98dff4e1eb11","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/bfs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 3Q1r1k/ppp4p/8/4p3/4q3/7P/1PP3R1/7K w - - 4 32\nside_to_move: white\nlegal_moves_uci: d8f8, d8e8, d8c8, d8b8, d8a8, d8e7, d8d7, d8c7, d8f6, d8d6, d8g5, d8d5, d8h4, d8d4, d8d3, d8d2, d8d1, h1h2, h1g1, h3h4, c2c3, b2b3, c2c4, b2b4\nmove: d8f8\n\nposition_fen: r2r2k1/ppp2p1p/5p2/5Q2/8/5P2/PPP3PP/1K1R1B1R b - - 0 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8g7, d8f8, d8e8, d8c8, d8b8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, a8c8, a8b8, h7h6, c7c6, b7b6, a7a6, h7h5, c7c5, b7b5, a7a5\nmove: d8d1\n\nposition_fen: 5k2/2p4R/3pQ1p1/1p1P1p2/1r1P4/3K1P2/r4P2/7R b - - 0 33\nside_to_move: black\nlegal_moves_uci: b4d4, b4c4, b4a4, b4b3, b4b2, b4b1, a2a8, a2a7, a2a6, a2a5, a2a4, a2a3, a2f2, a2e2, a2d2, a2c2, a2b2, a2a1, c7c6, g6g5, f5f4, c7c5\nmove: b4b3\n\nposition_fen: 8/8/3k3p/pp1P2p1/2pK2P1/P1P5/2P5/8 w - - 0 49\nside_to_move: white\nlegal_moves_uci: d4e4, d4e3, a3a4\nmove: d4e4\n\nposition_fen: r3r1k1/1p1qbppp/p1n5/2pp1N2/6N1/2PP3P/PP3PP1/R2QR1K1 b - - 6 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, a8d8, a8c8, a8b8, a8a7, e7f8, e7d8, e7f6, e7d6, e7g5, e7h4, d7d8, d7c8, d7c7, d7e6, d7d6, d7f5, c6d8, c6b8, c6a7, c6e5, c6a5, c6d4, c6b4, h7h6, g7g6, f7f6, b7b6, a6a5, d5d4, c5c4, h7h5, g7g5, b7b5\nmove: d7f5\npuzzle_id: DmJlo\nrating: 792\nthemes: ['advantage', 'hangingPiece', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: 3r1rk1/4R2p/p4bp1/1p3p2/4QPP1/8/P4q1P/3R3K w - - 0 29\nside_to_move: white\nlegal_moves_uci: e7e8, e7h7, e7g7, e7f7, e7d7, e7c7, e7b7, e7a7, e7e6, e7e5, e4a8, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4d4, e4c4, e4b4, e4a4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, e4b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, g4f5, g4g5, h2h3, a2a3, h2h4, a2a4\nmove: e4e6\npuzzle_id: 0PhbW\nrating: 2606\nthemes: ['deflection', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 7k/3n2p1/4Q2p/3p2N1/8/3q4/1P3KPP/r3B3 w - - 0 29\nside_to_move: white\nlegal_moves_uci: e6g8, e6e8, e6f7, e6e7, e6d7, e6h6, e6g6, e6f6, e6d6, e6c6, e6b6, e6a6, e6f5, e6e5, e6d5, e6g4, e6e4, e6h3, e6e3, e6e2, g5h7, g5f7, g5e4, g5h3, g5f3, f2g1, e1a5, e1b4, e1c3, e1d2, h2h3, g2g3, b2b3, h2h4, g2g4, b2b4\nmove: e6e8\npuzzle_id: vyvus\nrating: 1408\nthemes: ['endgame', 'fork', 'mate', 'mateIn2', 'short']\nposition_index: 0\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb2k/2p4P/8/2P2Q2/PP1P1PP1/RNB1K2R w KQ - 1 13\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1h4, h1h3, h1h2, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, g2g3, d2d3, b2b3, a2a3, g2g4, d2d4, b2b4, a2a4\nmove: f3e3\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 2\n\nposition_fen: 4k3/2p3R1/2p1PK2/5r2/p2P4/r7/8/B7 w - - 0 47\nside_to_move: white\nlegal_moves_uci: f6g6, f6f5\nmove: f6f5\npuzzle_id: 52eVA\nrating: 2338\nthemes: ['crushing', 'defensiveMove', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: 1r4RQ/p5r1/2n1pk1p/5p1q/2PP4/5P2/P4P1P/R6K w - - 6 31\nside_to_move: white\nlegal_moves_uci: h8h7, h8g7, h8h6, g8f8, g8e8, g8d8, g8c8, g8b8, g8g7, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, d4d5, c4c5, f3f4, h2h3, a2a3, h2h4, a2a4\nmove: h8g7\npuzzle_id: C9c6a\nrating: 2054\nthemes: ['discoveredAttack', 'discoveredCheck', 'exposedKing', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: rn3rk1/4b2p/6pB/pp1p2N1/8/P5nP/1P3PP1/R3R1K1 w - - 0 29\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, g5h7, g5f7, g5e6, g5e4, g5f3, g1h2, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, a1a2, a1d1, a1c1, a1b1, f2g3, h3h4, a3a4, f2f3, b2b3, f2f4, b2b4\nmove: e1e7\npuzzle_id: mPgSs\nrating: 2619\nthemes: ['crushing', 'discoveredAttack', 'discoveredCheck', 'kingsideAttack', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: r4rk1/ppp2pq1/3p2p1/3Np1n1/3nP1pQ/8/PPP2P2/1K3B1R w - - 4 19\nside_to_move: white\nlegal_moves_uci: d5e7, d5c7, d5f6, d5b6, d5f4, d5b4, d5e3, d5c3, h4h8, h4h7, h4h6, h4h5, h4g5, h4g4, h4h3, h4g3, h4h2, h1h3, h1h2, h1g1, f1a6, f1b5, f1c4, f1h3, f1d3, f1g2, f1e2, b1c1, b1a1, f2f3, c2c3, b2b3, a2a3, f2f4, c2c4, b2b4, a2a4\nmove: d5e7\npuzzle_id: m17EB\nrating: 1277\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 8/5pkp/2BR2p1/1pP1p3/1P5q/3QP2P/5P1K/r7 b - - 0 32\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, h4d8, h4e7, h4h6, h4f6, h4h5, h4g5, h4g4, h4f4, h4e4, h4d4, h4c4, h4b4, h4h3, h4g3, h4f2, a1a8, a1a7, a1a6, a1a5, a1a4, a1a3, a1a2, a1h1, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, h7h6, f7f6, g6g5, e5e4, h7h5, f7f5\nmove: h4f2\npuzzle_id: HNck2\nrating: 2516\nthemes: ['advantage', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb3/2p3k1/8/2P2Q2/PP1P1PPP/RNB1K2R w KQ - 0 11\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3h5, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, h2h3, g2g3, d2d3, b2b3, a2a3, h2h4, g2g4, d2d4, b2b4, a2a4\nmove: h2h4\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 0\n\nposition_fen: r5k1/3n1pbp/6p1/8/3Bq3/1P5P/P1RQ2P1/1K5R b - - 3 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, a8a6, a8a5, a8a4, a8a3, a8a2, g7h8, g7f8, g7h6, g7f6, g7e5, g7d4, d7f8, d7b8, d7f6, d7b6, d7e5, d7c5, e4e8, e4e7, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4h4, e4g4, e4f4, e4d4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: g7d4\npuzzle_id: uHEok\nrating: 1301\nthemes: ['crushing', 'discoveredAttack', 'middlegame', 'short']\nposition_index: 1","sha256":"e412376a0af9bc433050f07ea46267be7ef0a1c269eca77dd06e4c158642edbd","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/brs/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: r4k2/3Q4/pp1p1pBp/2pP4/2P1q3/2P5/P1K5/8 w - - 1 35\nside_to_move: white\nlegal_moves_uci: c2b3, c2d2, c2b2, c2d1, c2c1, g6e4\nmove: g6e4\n\nposition_fen: r2r2kb/pp2pp1p/2q2npB/4p3/8/2N5/PPPQ1PPP/3R1RK1 w - - 0 15\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, h6g5, h6f4, h6e3, c3d5, c3b5, c3e4, c3a4, c3e2, c3b1, d2d8, d2d7, d2d6, d2g5, d2d5, d2f4, d2d4, d2e3, d2d3, d2e2, d2e1, d2c1, g1h1, f1e1, d1e1, d1c1, d1b1, d1a1, h2h3, g2g3, f2f3, b2b3, a2a3, h2h4, g2g4, f2f4, b2b4, a2a4\nmove: d2d8\n\nposition_fen: 8/8/P7/1K2k3/7b/8/8/8 w - - 1 70\nside_to_move: white\nlegal_moves_uci: b5c6, b5b6, b5c5, b5a5, b5c4, b5b4, b5a4, a6a7\nmove: a6a7\n\nposition_fen: r1rR2k1/1b3pp1/5n1p/2p1p3/1p2P3/1B3P1P/NPP3P1/3R2K1 b - - 2 23\nside_to_move: black\nlegal_moves_uci: g8h7, c8d8, f6e8\nmove: c8d8\npuzzle_id: wAXWr\nrating: 438\nthemes: ['crushing', 'middlegame', 'short']\nposition_index: 0\n\nposition_fen: 2Q5/2Qq1ppp/4kn2/8/1P6/7P/6PK/4q3 w - - 4 41\nside_to_move: white\nlegal_moves_uci: c8h8, c8g8, c8f8, c8e8, c8d8, c8b8, c8a8, c8d7, c8b7, c8a6, c7d8, c7b8, c7d7, c7b7, c7a7, c7d6, c7c6, c7b6, c7e5, c7c5, c7a5, c7f4, c7c4, c7g3, c7c3, c7c2, c7c1, b4b5, h3h4, g2g3, g2g4\nmove: c7d7\npuzzle_id: uVlY9\nrating: 2723\nthemes: ['crushing', 'endgame', 'skewer', 'veryLong']\nposition_index: 2\n\nposition_fen: 6r1/pp1rn3/4kp1p/4p1B1/2P5/3p4/PP4PP/5RK1 w - - 0 23\nside_to_move: white\nlegal_moves_uci: g5h6, g5f6, g5h4, g5f4, g5e3, g5d2, g5c1, g1f2, g1h1, f1f6, f1f5, f1f4, f1f3, f1f2, f1e1, f1d1, f1c1, f1b1, f1a1, c4c5, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: f1f6\npuzzle_id: vy2z0\nrating: 1912\nthemes: ['endgame', 'mate', 'mateIn2', 'operaMate', 'sacrifice', 'short']\nposition_index: 1\n\nposition_fen: r3k2r/ppR4p/3pN1p1/3P1bBq/1b1P4/8/P4PPP/5RK1 w - - 1 22\nside_to_move: white\nlegal_moves_uci: c7c8, c7h7, c7g7, c7f7, c7e7, c7d7, c7b7, c7c6, c7c5, c7c4, c7c3, c7c2, c7c1, e6f8, e6d8, e6g7, e6c5, e6f4, g5d8, g5e7, g5h6, g5f6, g5h4, g5f4, g5e3, g5d2, g5c1, g1h1, f1e1, f1d1, f1c1, f1b1, f1a1, h2h3, g2g3, f2f3, a2a3, h2h4, g2g4, f2f4, a2a4\nmove: c7e7\npuzzle_id: TfTse\nrating: 1823\nthemes: ['mate', 'mateIn2', 'middlegame', 'operaMate', 'short', 'vukovicMate']\nposition_index: 1\n\nposition_fen: 1r1r3k/p5p1/6Pp/Q6P/8/8/PR3P2/K7 b - - 0 39\nside_to_move: black\nlegal_moves_uci: h8g8, d8g8, d8f8, d8e8, d8c8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, a7a6\nmove: d8d1\npuzzle_id: TMIoF\nrating: 1117\nthemes: ['endgame', 'mate', 'mateIn2', 'queenRookEndgame', 'short']\nposition_index: 0\n\nposition_fen: 3r3k/1p1P1Qpp/1pn5/6q1/1P5n/P5p1/1B3P1P/3R2K1 w - - 0 33\nside_to_move: white\nlegal_moves_uci: f7g8, f7f8, f7e8, f7g7, f7e7, f7g6, f7f6, f7e6, f7h5, f7f5, f7d5, f7f4, f7c4, f7f3, f7b3, f7a2, b2g7, b2f6, b2e5, b2d4, b2c3, b2c1, b2a1, g1h1, g1f1, d1d6, d1d5, d1d4, d1d3, d1d2, d1f1, d1e1, d1c1, d1b1, d1a1, h2g3, f2g3, b4b5, a3a4, h2h3, f2f3, f2f4\nmove: f7e8\npuzzle_id: KEajm\nrating: 1461\nthemes: ['advancedPawn', 'mate', 'mateIn2', 'middlegame', 'promotion', 'short']\nposition_index: 0\n\nposition_fen: r7/1pp2kp1/p4Pp1/3P4/3Q4/2NK1R2/PPP4r/4R2q b - - 5 25\nside_to_move: black\nlegal_moves_uci: a8h8, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, f7g8, f7f8, h2h8, h2h7, h2h6, h2h5, h2h4, h2h3, h2g2, h2f2, h2e2, h2d2, h2c2, h1f3, h1g2, h1g1, h1f1, h1e1, g7f6, c7c6, b7b6, g6g5, a6a5, c7c5, b7b5\nmove: h1f3\npuzzle_id: dJaOf\nrating: 2294\nthemes: ['advantage', 'deflection', 'discoveredAttack', 'fork', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 4\n\nposition_fen: 3r3r/pk1nQ3/1pp1B2p/4q3/4P3/5p1P/P1PR3K/6R1 w - - 0 32\nside_to_move: white\nlegal_moves_uci: h2h1, g1g3\nmove: h2h1\npuzzle_id: dQKHW\nrating: 2485\nthemes: ['advantage', 'middlegame', 'veryLong']\nposition_index: 1\n\nposition_fen: 1rr2k2/3b1p2/p3pP2/7P/1qnP4/4Q3/PP4R1/1K4N1 w - - 3 35\nside_to_move: white\nlegal_moves_uci: e3h6, e3e6, e3g5, e3e5, e3f4, e3e4, e3h3, e3g3, e3f3, e3d3, e3c3, e3b3, e3a3, e3f2, e3e2, e3d2, e3e1, e3c1, g2g8, g2g7, g2g6, g2g5, g2g4, g2g3, g2h2, g2f2, g2e2, g2d2, g2c2, g1h3, g1f3, g1e2, b1c2, b1c1, b1a1, h5h6, d4d5, b2b3, a2a3, a2a4\nmove: e3h6\npuzzle_id: zc37A\nrating: 2324\nthemes: ['mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 1\n\nposition_fen: r1bR1r1k/2p1n1pB/2p4p/1pq1P1N1/p7/R1P1P3/5PPP/6K1 w - - 4 28\nside_to_move: white\nlegal_moves_uci: d8f8, d8e8, d8c8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, h7g8, h7g6, h7f5, h7e4, h7d3, h7c2, h7b1, g5f7, g5e6, g5e4, g5h3, g5f3, a3a4, a3b3, a3a2, a3a1, g1h1, g1f1, e5e6, e3e4, c3c4, h2h3, g2g3, f2f3, h2h4, g2g4, f2f4\nmove: d8f8\npuzzle_id: 72g6J\nrating: 2396\nthemes: ['kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: 7r/5k2/2p2b2/2p2P2/2P3K1/5RN1/7P/8 b - - 8 46\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, f7g8, f7f8, f7e8, f7g7, f7e7, f6d8, f6g7, f6e7, f6g5, f6e5, f6h4, f6d4, f6c3, f6b2, f6a1\nmove: h8h4\npuzzle_id: LPIS0\nrating: 2432\nthemes: ['endgame', 'long', 'mate', 'mateIn3', 'operaMate']\nposition_index: 2\n\nposition_fen: r1b3rk/ppppQ2p/5p1p/8/8/6P1/P1q1PPBP/5RK1 w - - 0 18\nside_to_move: white\nlegal_moves_uci: e7f8, e7e8, e7d8, e7h7, e7g7, e7f7, e7d7, e7f6, e7e6, e7d6, e7e5, e7c5, e7e4, e7b4, e7e3, e7a3, g2b7, g2c6, g2d5, g2e4, g2h3, g2f3, g2h1, g1h1, f1e1, f1d1, f1c1, f1b1, f1a1, g3g4, h2h3, f2f3, e2e3, a2a3, h2h4, f2f4, e2e4, a2a4\nmove: g2e4\npuzzle_id: duNVv\nrating: 2796\nthemes: ['advantage', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: 3r3Q/1p1qk3/p3n1R1/4Pp2/3p4/P6P/1P1r4/7K w - - 3 49\nside_to_move: white\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8g7, h8h6, h8f6, h8h5, h8h4, g6g8, g6g7, g6h6, g6f6, g6e6, g6g5, g6g4, g6g3, g6g2, g6g1, h1g1, h3h4, a3a4, b2b3, b2b4\nmove: h8f6\npuzzle_id: tljkh\nrating: 2202\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 2","sha256":"b7d6a74a353895ff094650e6587989061729ac103c04313453627f0164689f5c","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/brs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 2b2rk1/5ppp/2N1pn2/1n1p4/2pP4/2P1P1P1/2B2PP1/qN1QK2R w K - 2 20\nside_to_move: white\nlegal_moves_uci: c6d8, c6b8, c6e7, c6a7, c6e5, c6a5, c6b4, c2h7, c2g6, c2f5, c2e4, c2a4, c2d3, c2b3, h1h7, h1h6, h1h5, h1h4, h1h3, h1h2, h1g1, h1f1, e1e2, e1d2, e1f1, d1h5, d1g4, d1f3, d1d3, d1e2, d1d2, d1c1, b1a3, b1d2, e1g1, g3g4, e3e4, f2f3, f2f4\nmove: c2h7\n\nposition_fen: r1bk2nr/ppp2pp1/1b1P3p/n2BN3/8/B1P5/P1q2PPP/RN2R1K1 w - - 3 20\nside_to_move: white\nlegal_moves_uci: e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, d5f7, d5b7, d5e6, d5c6, d5e4, d5c4, d5f3, d5b3, a3c5, a3b4, a3b2, a3c1, g1h1, g1f1, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, b1d2, d6c7, d6d7, c3c4, h2h3, g2g3, h2h4, g2g4\nmove: e5f7\n\nposition_fen: r4k2/3Q4/pp1p1pBp/2pP4/2P1q3/2P5/P1K5/8 w - - 1 35\nside_to_move: white\nlegal_moves_uci: c2b3, c2d2, c2b2, c2d1, c2c1, g6e4\nmove: g6e4\n\nposition_fen: 2k4r/ppp2p2/3bpq2/8/3P4/2P2Q2/PP3P1p/4RR1K b - - 0 24\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, h8h4, h8h3, c8d8, c8b8, c8d7, f6d8, f6g7, f6e7, f6h6, f6g6, f6g5, f6f5, f6e5, f6h4, f6f4, f6d4, f6f3, d6f8, d6e7, d6e5, d6c5, d6f4, d6b4, d6g3, d6a3, c7c6, b7b6, a7a6, e6e5, c7c5, b7b5, a7a5\nmove: f6f3\npuzzle_id: e5nms\nrating: 473\nthemes: ['endgame', 'hangingPiece', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0\n\nposition_fen: 4r1k1/bp3pp1/p1pB3p/8/1PPp4/P6P/2P2PP1/4R1K1 b - - 0 23\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, a7b8, a7b6, a7c5, g7g6, f7f6, b7b6, h6h5, c6c5, a6a5, d4d3, g7g5, f7f5, b7b5\nmove: e8e1\npuzzle_id: jR4S3\nrating: 553\nthemes: ['crushing', 'endgame', 'kingsideAttack', 'short']\nposition_index: 1\n\nposition_fen: 8/Q3Bppk/2p4p/8/5PKP/2q5/7P/8 b - - 2 42\nside_to_move: black\nlegal_moves_uci: h7h8, h7g8, h7g6, c3f6, c3e5, c3c5, c3a5, c3d4, c3c4, c3b4, c3h3, c3g3, c3f3, c3e3, c3d3, c3b3, c3a3, c3d2, c3c2, c3b2, c3e1, c3c1, c3a1, g7g6, f7f6, h6h5, c6c5, g7g5, f7f5\nmove: f7f5\npuzzle_id: 1EyJ6\nrating: 2739\nthemes: ['attraction', 'endgame', 'mate', 'mateIn4', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: r4rk1/1b1p1pp1/p4n1p/2bNp3/Q1B3q1/5RP1/PPP2PKP/R1B5 w - - 3 19\nside_to_move: white\nlegal_moves_uci: d5e7, d5c7, d5f6, d5b6, d5f4, d5b4, d5e3, d5c3, c4a6, c4b5, c4d3, c4b3, c4e2, c4f1, a4d7, a4c6, a4a6, a4b5, a4a5, a4b4, a4b3, a4a3, f3f6, f3f5, f3f4, f3e3, f3d3, f3c3, f3b3, f3a3, g2h1, g2g1, g2f1, c1h6, c1g5, c1f4, c1e3, c1d2, a1b1, h2h3, c2c3, b2b3, a2a3, h2h4, b2b4\nmove: d5f6\npuzzle_id: tL78X\nrating: 1614\nthemes: ['crushing', 'discoveredAttack', 'kingsideAttack', 'middlegame', 'short']\nposition_index: 0\n\nposition_fen: 4Q3/6pk/6pp/p2q3P/8/PP6/K7/3r4 w - - 0 41\nside_to_move: white\nlegal_moves_uci: e8h8, e8g8, e8f8, e8d8, e8c8, e8b8, e8a8, e8f7, e8e7, e8d7, e8g6, e8e6, e8c6, e8e5, e8b5, e8e4, e8a4, e8e3, e8e2, e8e1, a2b2, h5g6, a3a4\nmove: h5g6\npuzzle_id: g7TJ8\nrating: 2445\nthemes: ['attraction', 'endgame', 'mate', 'mateIn5', 'sacrifice', 'veryLong']\nposition_index: 4\n\nposition_fen: r3kbnr/p3p1pp/b1p2p2/3p4/5P2/1P1P1N2/1BP1K1PP/RN5R w kq - 0 12\nside_to_move: white\nlegal_moves_uci: f3g5, f3e5, f3h4, f3d4, f3d2, f3g1, f3e1, e2e3, e2f2, e2d2, e2f1, e2e1, e2d1, b2f6, b2e5, b2d4, b2c3, b2a3, b2c1, h1g1, h1f1, h1e1, h1d1, h1c1, b1c3, b1a3, b1d2, a1a6, a1a5, a1a4, a1a3, a1a2, f4f5, b3b4, h2h3, g2g3, c2c3, h2h4, g2g4, c2c4\nmove: a1a6\npuzzle_id: 30PDB\nrating: 959\nthemes: ['crushing', 'hangingPiece', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: R1b2r1k/1pQ5/3P2p1/2PB1p2/8/4q1P1/6KP/8 b - - 1 31\nside_to_move: black\nlegal_moves_uci: f8g8, f8e8, f8d8, f8f7, f8f6, c8d7, c8e6, e3e8, e3e7, e3h6, e3e6, e3g5, e3e5, e3c5, e3f4, e3e4, e3d4, e3g3, e3f3, e3d3, e3c3, e3b3, e3a3, e3f2, e3e2, e3d2, e3g1, e3e1, e3c1, b7b6, g6g5, f5f4, b7b5\nmove: f5f4\npuzzle_id: y2J2Y\nrating: 2530\nthemes: ['crushing', 'endgame', 'long', 'sacrifice']\nposition_index: 0\n\nposition_fen: 5rk1/6p1/6Qp/3pN3/P7/2PB2q1/6b1/3RR1K1 b - - 5 34\nside_to_move: black\nlegal_moves_uci: g8h8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, f8f1, g3g6, g3g5, g3e5, g3h4, g3g4, g3f4, g3h3, g3f3, g3e3, g3d3, g3h2, g3f2, g3e1, g2e4, g2h3, g2f3, g2h1, g2f1, h6h5, d5d4\nmove: g3f2\npuzzle_id: JDyIr\nrating: 2487\nthemes: ['exposedKing', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'triangleMate', 'veryLong']\nposition_index: 1\n\nposition_fen: R1Q2r1k/1p6/3P2p1/2P5/8/4qBP1/6KP/8 b - - 0 33\nside_to_move: black\nlegal_moves_uci: h8g8, h8h7, h8g7, f8g8, f8e8, f8d8, f8c8, e3e8, e3e7, e3h6, e3e6, e3g5, e3e5, e3c5, e3f4, e3e4, e3d4, e3f3, e3d3, e3c3, e3b3, e3a3, e3f2, e3e2, e3d2, e3g1, e3e1, e3c1, b7b6, g6g5, b7b5\nmove: e3f3\npuzzle_id: y2J2Y\nrating: 2530\nthemes: ['crushing', 'endgame', 'long', 'sacrifice']\nposition_index: 2\n\nposition_fen: 8/8/2nrkp1p/4p1pP/1pP1P1P1/pP3R2/P1B1K3/8 b - - 15 54\nside_to_move: black\nlegal_moves_uci: e6f7, e6e7, e6d7, d6d8, d6d7, d6d5, d6d4, d6d3, d6d2, d6d1, c6d8, c6b8, c6e7, c6a7, c6a5, c6d4, f6f5\nmove: c6d4\npuzzle_id: tgllk\nrating: 882\nthemes: ['crushing', 'endgame', 'oneMove']\nposition_index: 0\n\nposition_fen: 1nk2r2/ppp1p3/3p3b/1P4N1/2PPK3/PQ2P2q/1B3P1N/R4R2 b - - 6 28\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, c8d8, c8d7, b8d7, b8c6, b8a6, h6g7, h6g5, h3d7, h3e6, h3h5, h3f5, h3h4, h3g4, h3g3, h3f3, h3e3, h3h2, h3g2, h3f1, e7e6, c7c6, b7b6, a7a6, d6d5, e7e5, c7c5, a7a5\nmove: h3f5\npuzzle_id: rOVaH\nrating: 1470\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 8/2p3pk/2p4p/3pQPrN/p1qP4/3b4/6PP/4R1K1 w - - 1 30\nside_to_move: white\nlegal_moves_uci: h5g7, h5f6, h5f4, h5g3, e5e8, e5g7, e5e7, e5c7, e5f6, e5e6, e5d6, e5d5, e5f4, e5e4, e5g3, e5e3, e5e2, g1f2, g1h1, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, e1a1, f5f6, h2h3, g2g3, h2h4, g2g4\nmove: e5g7\npuzzle_id: QX82N\nrating: 2291\nthemes: ['arabianMate', 'endgame', 'mate', 'mateIn4', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/8/8/5p2/7P/8/4K1kP/8 b - - 0 51\nside_to_move: black\nlegal_moves_uci: g2h3, g2h2, g2h1, g2g1, f5f4\nmove: f5f4\npuzzle_id: ulmPp\nrating: 2799\nthemes: ['advancedPawn', 'crushing', 'endgame', 'exposedKing', 'pawnEndgame', 'quietMove', 'veryLong', 'zugzwang']\nposition_index: 2","sha256":"aa4b119354296ecef2e3125794158eea4905791054729372524f3362a26e908d","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/brs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 8/1K1k2pp/4pp2/2P5/p7/5P2/7P/8 w - - 0 37\nside_to_move: white\nlegal_moves_uci: b7b8, b7a8, b7a7, b7b6, b7a6, c5c6, f3f4, h2h3, h2h4\nmove: c5c6\n\nposition_fen: 3r3k/4R2p/p4rp1/1p3p2/5PP1/8/P4q1P/3R3K w - - 0 31\nside_to_move: white\nlegal_moves_uci: e7e8, e7h7, e7g7, e7f7, e7d7, e7c7, e7b7, e7a7, e7e6, e7e5, e7e4, e7e3, e7e2, e7e1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, g4f5, g4g5, h2h3, a2a3, h2h4, a2a4\nmove: d1d8\n\nposition_fen: 2r4k/p6p/2r2pp1/4p3/2P1P3/5P2/K1PR1BPP/3R4 b - - 0 30\nside_to_move: black\nlegal_moves_uci: h8g8, h8g7, c8g8, c8f8, c8e8, c8d8, c8b8, c8a8, c8c7, c6c7, c6e6, c6d6, c6b6, c6a6, c6c5, c6c4, h7h6, a7a6, g6g5, f6f5, h7h5, a7a5\nmove: c6a6\npuzzle_id: ZDTsV\nrating: 2640\nthemes: ['attraction', 'mate', 'mateIn5', 'middlegame', 'veryLong']\nposition_index: 1\n\nposition_fen: 1B5k/p5b1/1p5p/2p3p1/2Pp4/1P3QKP/P2R1PP1/6qr b - - 7 34\nside_to_move: black\nlegal_moves_uci: h8g8, h8h7, g7f8, g7f6, g7e5, h1h3, h1h2, g1h2, g1g2, g1f2, g1f1, g1e1, g1d1, g1c1, g1b1, g1a1, a7a6, h6h5, b6b5, g5g4, d4d3, a7a5\nmove: g1h2\npuzzle_id: QrbYp\nrating: 1794\nthemes: ['crushing', 'endgame', 'oneMove']\nposition_index: 0\n\nposition_fen: r3r1k1/1p1qbppp/p1n5/2pp1N2/6N1/2PP3P/PP3PP1/R2QR1K1 b - - 6 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, a8d8, a8c8, a8b8, a8a7, e7f8, e7d8, e7f6, e7d6, e7g5, e7h4, d7d8, d7c8, d7c7, d7e6, d7d6, d7f5, c6d8, c6b8, c6a7, c6e5, c6a5, c6d4, c6b4, h7h6, g7g6, f7f6, b7b6, a6a5, d5d4, c5c4, h7h5, g7g5, b7b5\nmove: d7f5\npuzzle_id: DmJlo\nrating: 792\nthemes: ['advantage', 'hangingPiece', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 2k5/1p2bpp1/pP1p2p1/2pPP3/5P2/2N2Q1K/1P4R1/R1B2q2 b - - 0 25\nside_to_move: black\nlegal_moves_uci: c8d8, c8b8, c8d7, e7f8, e7d8, e7f6, e7g5, e7h4, f1b5, f1c4, f1f3, f1d3, f1g2, f1f2, f1e2, f1h1, f1g1, f1e1, f1d1, f1c1, d6e5, f7f6, g6g5, a6a5, c5c4, f7f5\nmove: f1h1\npuzzle_id: b4yqE\nrating: 2626\nthemes: ['attraction', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 1k4r1/3n4/8/QN2p3/1Pb5/P3bP1P/2P1R3/R4K2 b - - 4 35\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8e8, g8d8, g8c8, g8g7, g8g6, g8g5, g8g4, g8g3, g8g2, g8g1, b8c8, b8b7, d7f8, d7f6, d7b6, d7c5, c4f7, c4e6, c4d5, c4b5, c4d3, c4b3, c4e2, c4a2, e3a7, e3h6, e3b6, e3g5, e3c5, e3f4, e3d4, e3f2, e3d2, e3g1, e3c1, e5e4\nmove: g8g1\npuzzle_id: 2m2q0\nrating: 2368\nthemes: ['discoveredAttack', 'discoveredCheck', 'mate', 'mateIn4', 'middlegame', 'operaMate', 'pin', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: 6k1/pp4p1/2p3Q1/3p2Pp/1P1Pn2q/P3P3/5RK1/6R1 b - - 1 36\nside_to_move: black\nlegal_moves_uci: g8h8, h4g5, h4g4, h4f4, h4h3, h4g3, h4h2, h4f2, h4h1, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, b7b6, a7a6, c6c5, b7b5, a7a5\nmove: h4g3\npuzzle_id: KWUeV\nrating: 2382\nthemes: ['exposedKing', 'fork', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 1r1q1r2/1b4p1/p3kbQ1/1pPpn3/1P6/3B4/P2N1PPP/4R1K1 w - - 2 23\nside_to_move: white\nlegal_moves_uci: g6e8, g6h7, g6g7, g6f7, g6h6, g6f6, g6h5, g6g5, g6f5, g6g4, g6e4, g6g3, d3f5, d3b5, d3e4, d3c4, d3e2, d3c2, d3f1, d3b1, d2e4, d2c4, d2f3, d2b3, d2f1, d2b1, g1h1, g1f1, e1e5, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, e1a1, c5c6, h2h3, g2g3, f2f3, a2a3, h2h4, g2g4, f2f4, a2a4\nmove: d3f5\npuzzle_id: CvFPH\nrating: 2145\nthemes: ['deflection', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 0\n\nposition_fen: 1k4r1/3n4/8/QN1bp3/1P6/P3bP1P/2P5/R3RK2 b - - 2 34\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8e8, g8d8, g8c8, g8g7, g8g6, g8g5, g8g4, g8g3, g8g2, g8g1, b8c8, b8b7, d7f8, d7f6, d7b6, d7c5, d5a8, d5f7, d5b7, d5e6, d5c6, d5e4, d5c4, d5f3, d5b3, d5a2, e3a7, e3h6, e3b6, e3g5, e3c5, e3f4, e3d4, e3f2, e3d2, e3g1, e3c1, e5e4\nmove: d5c4\npuzzle_id: 2m2q0\nrating: 2368\nthemes: ['discoveredAttack', 'discoveredCheck', 'mate', 'mateIn4', 'middlegame', 'operaMate', 'pin', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: 3rr3/ppp2N2/4p3/6Q1/4k3/8/PPP2K1P/3q4 w - - 4 34\nside_to_move: white\nlegal_moves_uci: f7h8, f7d8, f7h6, f7d6, f7e5, g5g8, g5d8, g5g7, g5e7, g5h6, g5g6, g5f6, g5h5, g5f5, g5e5, g5d5, g5c5, g5b5, g5a5, g5h4, g5g4, g5f4, g5g3, g5e3, g5g2, g5d2, g5g1, g5c1, f2g3, f2g2, h2h3, c2c3, b2b3, a2a3, h2h4, c2c4, b2b4, a2a4\nmove: g5e5\npuzzle_id: VO6rx\nrating: 1528\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 1\n\nposition_fen: 6k1/pp4p1/2p3Q1/3p2Pp/1P1Pn1qP/P3P3/5R1K/6R1 b - - 0 35\nside_to_move: black\nlegal_moves_uci: g8h8, g4c8, g4d7, g4e6, g4g5, g4f5, g4h4, g4f4, g4h3, g4g3, g4f3, g4g2, g4e2, g4g1, g4d1, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, b7b6, a7a6, c6c5, b7b5, a7a5\nmove: g4h4\npuzzle_id: KWUeV\nrating: 2382\nthemes: ['exposedKing', 'fork', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 1\n\nposition_fen: 8/p4bk1/5p1p/P4p2/B3pN2/P7/2P2PPP/1r1R2K1 b - - 3 25\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h7, f7g8, f7e8, f7g6, f7e6, f7h5, f7d5, f7c4, f7b3, f7a2, b1b8, b1b7, b1b6, b1b5, b1b4, b1b3, b1b2, b1d1, b1c1, b1a1, a7a6, h6h5, e4e3\nmove: b1d1\npuzzle_id: fXffx\nrating: 448\nthemes: ['backRankMate', 'endgame', 'mate', 'mateIn2', 'short']\nposition_index: 1\n\nposition_fen: 8/Bp3k1p/8/8/5pR1/PP4nP/4r1P1/6K1 b - - 0 35\nside_to_move: black\nlegal_moves_uci: f7f8, f7e8, f7e7, f7f6, f7e6, g3h5, g3f5, g3e4, g3h1, g3f1, e2e8, e2e7, e2e6, e2e5, e2e4, e2e3, e2g2, e2f2, e2d2, e2c2, e2b2, e2a2, e2e1, h7h6, b7b6, f4f3, h7h5, b7b5\nmove: e2e1\npuzzle_id: 2wXta\nrating: 1303\nthemes: ['endgame', 'hookMate', 'mate', 'mateIn2', 'short']\nposition_index: 0\n\nposition_fen: 8/5pkp/2BR2p1/1pP1p3/1P5q/3QP2P/5P1K/r7 b - - 0 32\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, h4d8, h4e7, h4h6, h4f6, h4h5, h4g5, h4g4, h4f4, h4e4, h4d4, h4c4, h4b4, h4h3, h4g3, h4f2, a1a8, a1a7, a1a6, a1a5, a1a4, a1a3, a1a2, a1h1, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, h7h6, f7f6, g6g5, e5e4, h7h5, f7f5\nmove: h4f2\npuzzle_id: HNck2\nrating: 2516\nthemes: ['advantage', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: 8/p1p2R2/1p2p1k1/2nr2p1/3B2r1/8/P1P3P1/5RK1 w - - 4 30\nside_to_move: white\nlegal_moves_uci: f7f8, f7h7, f7g7, f7e7, f7d7, f7c7, f7f6, f7f5, f7f4, f7f3, f7f2, d4h8, d4g7, d4f6, d4e5, d4c5, d4e3, d4c3, d4f2, d4b2, d4a1, g1h2, g1f2, g1h1, f1f6, f1f5, f1f4, f1f3, f1f2, f1e1, f1d1, f1c1, f1b1, f1a1, g2g3, c2c3, a2a3, c2c4, a2a4\nmove: f1f6\npuzzle_id: l7u9R\nrating: 2654\nthemes: ['endgame', 'exposedKing', 'mate', 'mateIn4', 'veryLong']\nposition_index: 2","sha256":"28c35e439d30f7c7abeebd6c563c83fc532b02d5f398d41a3e5be9d80f353fe8","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/copro/42":{"text":"You are an expert chess grandmaster. Analyze the given chess position carefully. Identify whose turn it is, evaluate the tactical and strategic elements of the position (such as checks, captures, threats, pins, and forks), and calculate the forced winning line. Determine the single absolute best move for the active player. Provide your reasoning briefly, followed by the best move in Standard Algebraic Notation (e.g., Nf3, Bxh7+, O-O).","sha256":"19d29e11052604f45fbee46b9b3bf7529a035a8bf4b3959dee6ece7f66237118","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/copro/43":{"text":"You are Stockfish 16, the world's most powerful chess engine, analyzing at depth 30. Examine the given chess position and determine the side to play. Calculate all candidate moves, prioritizing checks, captures, and direct threats. Identify the single, objectively best move that secures the maximum material or positional advantage, or forces a mate-in-X. Output absolutely nothing else except this single move in UCI format (e.g., e2e4, e7e5) or Standard Algebraic Notation (SAN).","sha256":"f0a41c40f7285f0fd893fd71a9aa0941c2bc31121098d83846c1c1a19f267a54","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/copro/44":{"text":"Analyze the chess position and find the single best move for the active player. Look for winning tactical ideas, forcing moves, and checkmate sequences. Output only the final move.","sha256":"857f0f1ffaf844586a06d8824ff456861ab4d17794d2aad3b9ba77f04d2833c0","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/gepa/42":{"text":"You are an expert chess grandmaster and tactical analysis engine. Your task is to solve a chess puzzle by finding the single best tactical move from a list of legal moves.\n\n### Input Format\nYou will be provided with:\n1. `position_fen`: The current board state in Forsyth-Edwards Notation (FEN).\n2. `side_to_move`: The color ('white' or 'black') whose turn it is to play.\n3. `legal_moves_uci`: A comma-separated list of all legal moves available in Universal Chess Interface (UCI) notation.\n\n### Task Goal\nIdentify the single best move that solves the tactical puzzle. This move is almost always a highly forcing move that wins material, delivers checkmate, or creates an unstoppable winning threat (e.g., promoting a passed pawn). \n\n### Step-by-Step Tactical Analysis Strategy\nTo avoid choosing passive or sub-optimal legal moves, systematically evaluate candidate moves using the following protocol:\n\n1. **Reconstruct the Board State**: Read the `position_fen` to identify the locations of all pieces, king safety, open lines, and undefended/hanging pieces.\n2. **Prioritize Forcing Moves**: From the `legal_moves_uci` list, identify and prioritize candidate moves in this exact order:\n   * **Checks**: Can you put the enemy king in check? (Calculate all check paths).\n   * **Captures**: Can you capture an opponent's piece? Assess if it wins material or initiates a winning exchange.\n   * **Threats**: Can you make a move that creates an immediate, unstoppable threat? (e.g., threatening checkmate, fork, pin, or pushing a passed pawn toward promotion).\n3. **Calculate Replies (Look-Ahead)**: For your top candidate moves, calculate the opponent's best possible replies.\n   * Do not assume the opponent will play poorly; assume they will make the most defensive or forcing response.\n   * If a candidate move has a simple refutation or defense, discard it.\n4. **Identify Tactical Motifs**: Look for common puzzle themes:\n   * Intermezzo (in-between moves)\n   * Deflection / Decoy\n   * Pins, Skewers, and Forks\n   * Passed pawn promotion races (e.g., pushing a pawn to create an unstoppable queen)\n   * Back-rank checkmates\n5. **Verify Legality**: Ensure the final selected move is strictly present in the provided `legal_moves_uci` list.\n\n### Output Format\nProvide your final output in the following format, containing only the selected UCI move:\n\n```json\n{\n  \"move\": \"[UCI_MOVE]\"\n}\n```","sha256":"bcea4e0f067cc86adb16901cbf28c79ba7e7dc964883ec780e01a46ad26a631f","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/gepa/43":{"text":"You are an elite chess engine and grandmaster-level tactical puzzle solver. Your sole task is to analyze a given chess position and output the single best legal move in Universal Chess Interface (UCI) format that solves the tactical puzzle for the side to move.\n\n### Input Variables:\n- `position_fen`: The board state represented in Forsyth-Edwards Notation (FEN).\n- `side_to_move`: The player whose turn it is to play ('white' or 'black').\n- `legal_moves_uci`: A comma-separated list of all legal moves available in the position.\n\n---\n\n### Tactical Priority Search Heuristic (Strict Order of Evaluation)\n\nTo ensure you do not miss simple, game-winning tactical moves, you must evaluate the legal moves in the following strict order of priority. Do not move to a lower priority unless all higher priority options have been calculated and verified as suboptimal.\n\n#### Priority 1: Deliver Immediate Checkmate (Mate-in-1)\nScan every legal move to see if it immediately ends the game. \n- *Crucial Rule:* If a move results in checkmate (the opponent's king has no legal moves to escape), you **must** select it. \n- *Example Failure Avoided:* In a position where Qh5 (`f5h5`) is mate-in-1, do not play a passive or slow move like `f5f7`.\n\n#### Priority 2: Capture Hanging (Undefended) Major/Minor Pieces\nScan the board coordinates to identify any opponent pieces (especially Queens, Rooks, Knights, or Bishops) that are undefended or insufficiently defended.\n- *Crucial Rule:* If you can capture a high-value piece for free (e.g., capturing an undefended Rook with your Queen/Rook), you should almost always do so.\n- *Example Failure Avoided:* If `d3e4` captures an undefended enemy rook, do not play a speculative check like `d3d8` or a quiet move. If `a8e8` captures a rook with check, do not push a pawn with `f5f6`.\n\n#### Priority 3: Calculate Forcing Checks and Forced Replies\nIf there is no mate-in-1 or free hanging piece, evaluate every single check.\n- For every check, list the opponent's legal responses (blocking, running, or capturing).\n- Calculate the sequence to the end. Look for double checks, discovered attacks, or tactical forks that win decisive material or lead to a forced mate.\n\n#### Priority 4: Calculate Highly Forcing Captures and Trades\nEvaluate all captures that involve piece exchanges.\n- Look for tactical motifs: removing a key defender, deflecting an enemy piece, or liquidating into an obviously winning endgame (e.g., trading down when up material).\n\n#### Priority 5: Quiet Threats / Dual Attacks\nOnly if no checks or captures yield a winning advantage, look for quiet moves that create immediate, unstoppable threats (e.g., threatening mate on the next move while simultaneously attacking an undefended rook).\n\n---\n\n### Verification & Mental Sanity Check (Required Before Outputting)\n\nBefore choosing your final move, run through this checklist:\n1. **Is the move in the `legal_moves_uci` list?** It must match exactly.\n2. **Did I miss a Mate-in-1?** Re-evaluate if there is any move on the board that immediately wins the game.\n3. **Did I miss a free piece?** Look at the target square of your chosen move. Is there a better move that simply captures a free Rook, Queen, or minor piece?\n4. **Why is this move better than a positional move?** Remember, this is a tactical puzzle. If your chosen move is a slow pawn push or a quiet king safety move, double-check if you missed a highly forcing, direct tactical blow.\n\n---\n\n### Output Format:\nYour output must contain only the final chosen move in UCI format under the `### move` header. No other text, explanations, or commentary.\n\nExample:\n### move\ne2e4","sha256":"df7c353e55a1d27878a74f0e5357d25abc3fb5b8387cccc9d90a865470c86126","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/gepa/44":{"text":"You are an expert chess engine and tactical puzzle solver. Your task is to analyze a given chess position and determine the single best tactical move for the active side.\n\n### Input Format\nYou will be provided with three inputs:\n1. **position_fen**: The Forsyth-Edwards Notation (FEN) string representing the current state of the board.\n2. **side_to_move**: The color (\"white\" or \"black\") whose turn it is to make a move.\n3. **legal_moves_uci**: A comma-separated list of all valid legal moves available for the active side, written in UCI (Universal Chess Interface) format (e.g., `e2e4`, `g1f3`).\n\n### Strategy for Finding the Best Move\nTactical puzzles have a concrete, forcing solution that either delivers checkmate, wins decisive material, or forces a winning endgame. You must prioritize highly forcing moves (checks and captures) over quiet or defensive moves.\n\nExecute the following calculation protocol in precise order:\n\n1. **Scan for Mate in 1 (Absolute Priority)**:\n   - Identify every legal move that puts the enemy king in check.\n   - For each check, verify if the opponent has any legal responses (king moves, blocking moves, or capturing the checking piece).\n   - If a check leaves the opponent with **zero** legal responses, it is checkmate. You must play this move immediately. \n   - *Pawn Direction Alert*: Remember that White pawns move up (ranks 2 to 8) and Black pawns move down (ranks 7 to 1). A Black pawn on `g6` attacks `f5` and `h5`. If the White king is on `h5` and has no escape squares, `g7g6` is checkmate.\n   - *Knight Mate Alert*: Do not overlook quiet-looking knight checks (e.g., `f5e7+` when the king is trapped on `g8` and the h-file is cut off by your queen). This is checkmate.\n\n2. **Evaluate ALL Checks & Forced Sequences Rigorously**:\n   - If there is no Mate in 1, list all legal checks.\n   - Calculate the opponent's forced replies to each check. Do not stop after one move. Follow the sequence to its logical conclusion (e.g., mate in 2, mate in 3, or winning major material).\n   - Avoid \"hope chess\" sacrifices (e.g., sacrificing a queen on `h8` when it can be simply captured by the king without a follow-up mate).\n\n3. **Compare and Optimize Captures**:\n   - If the tactical solution involves capturing an undefended or high-value enemy piece, and you have **multiple pieces** that can perform the capture, calculate the consequences of each:\n     - Which capture keeps your capturing piece on a more active, dominant square?\n     - Which capture avoids giving the opponent counterplay (such as intermediate checks or pawn promotions)?\n     - *Example*: If both your queen and bishop can capture the opponent's queen, capturing with your queen may be far superior if it keeps your bishop active and dominant on its diagonal, whereas capturing with the bishop might misplace it or allow opponent counter-attacks.\n\n4. **Verify Against the Legal Moves List**:\n   - Ensure your final chosen move is present in the `legal_moves_uci` list.\n\n### Critical Safety Checks Before Outputting\nBefore finalizing your move, ask yourself:\n* *Did I miss an immediate Mate in 1?* (Look closely at every single check in the legal moves list).\n* *If there are multiple ways to capture a piece, did I choose the one that keeps my pieces most active and safe?*\n* *Does my chosen move allow the opponent an easy escape, a counter-check, or a dangerous pawn promotion?*\n\n### Output Format\nYour output must be extremely concise. Provide only the selected move in UCI format under the `### move` header. Do not include any explanations, reasoning, or additional commentary.\n\nFormat your response exactly as follows:\n### move\n[uci_move]","sha256":"1b9e3ccd6de5afb9d09833ab0af9cc4167f2376add18eec5b5819e4f4cc47697","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/miprov2/42":{"text":"You are a world-class chess Grandmaster and expert tactician. Analyze the given chess position (in FEN format), determine the turn (side to move), and select the single absolute best move from the provided list of legal UCI moves to solve the tactical puzzle. Output only the selected move in UCI format without any reasoning, explanation, or extra characters.\n\nposition_fen: 8/8/8/5p2/7P/8/4K1kP/8 b - - 0 51\nside_to_move: black\nlegal_moves_uci: g2h3, g2h2, g2h1, g2g1, f5f4\nmove: f5f4\n\nposition_fen: 5r1k/6pp/p7/q1p1p3/4P3/2PP3P/1P4P1/5R1K w - - 0 36\nside_to_move: white\nlegal_moves_uci: h1h2, h1g1, f1f8, f1f7, f1f6, f1f5, f1f4, f1f3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h3h4, d3d4, c3c4, g2g3, b2b3, g2g4, b2b4\nmove: f1f8\npuzzle_id: 3Wuv0\nrating: 592\nthemes: ['backRankMate', 'endgame', 'mate', 'mateIn2', 'queenRookEndgame', 'short']\nposition_index: 1\n\nposition_fen: r7/ppp3QR/1nkp4/4p3/4P1P1/8/PPP5/1K1N1q2 b - - 11 30\nside_to_move: black\nlegal_moves_uci: a8h8, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, c6c5, c6b5, b6c8, b6d7, b6d5, b6c4, b6a4, f1f8, f1f7, f1f6, f1a6, f1f5, f1b5, f1f4, f1c4, f1h3, f1f3, f1d3, f1g2, f1f2, f1e2, f1h1, f1g1, f1e1, f1d1, a7a6, d6d5, a7a5\nmove: f1d1\npuzzle_id: yFV7C\nrating: 2435\nthemes: ['endgame', 'long', 'mate', 'mateIn3', 'queensideAttack']\nposition_index: 2\n\nposition_fen: 8/5R2/p1p2r1p/Pp6/2pP1k1P/2P2P2/5K2/8 w - - 11 48\nside_to_move: white\nlegal_moves_uci: f7f8, f7h7, f7g7, f7e7, f7d7, f7c7, f7b7, f7a7, f7f6, f2g2, f2e2, f2g1, f2f1, f2e1, h4h5, d4d5\nmove: f7f6\npuzzle_id: VquEx\nrating: 459\nthemes: ['endgame', 'hangingPiece', 'master', 'mate', 'mateIn1', 'oneMove', 'rookEndgame']\nposition_index: 0","sha256":"dc7a0ed95df02aad086069b99191b3ab7cef970cb245292d46f926eb4944c3d8","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/miprov2/43":{"text":"Analyze the chess puzzle position provided in FEN format for the specified active player (side to move). Select the single best, most tactical, or winning move from the provided comma-separated list of legal UCI moves. Output ONLY the chosen move in UCI format (e.g., 'e4f6' or 'h8g8') without any analysis, prefix, labels, or extra text.\n\nposition_fen: 1k1r1bnr/pbp1q2p/1p1p1pp1/1N1PnB2/Q1P5/5N2/PP3PPP/R1B1R1K1 b - - 1 13\nside_to_move: black\nlegal_moves_uci: g8h6, f8g7, f8h6, d8e8, d8c8, d8d7, b8a8, e7e8, e7g7, e7f7, e7d7, e7e6, b7c8, b7a8, b7c6, b7a6, b7d5, e5f7, e5d7, e5c6, e5g4, e5c4, e5f3, e5d3, g6f5, h7h6, c7c6, a7a6, g6g5, h7h5, c7c5, a7a5\nmove: e5f3\npuzzle_id: 7eNCM\nrating: 763\nthemes: ['advantage', 'discoveredAttack', 'kingsideAttack', 'opening', 'short']\nposition_index: 0\n\nposition_fen: 8/1pR5/p5kp/6p1/b7/5P1P/r1nR2PK/8 w - - 2 36\nside_to_move: white\nlegal_moves_uci: c7c8, c7h7, c7g7, c7f7, c7e7, c7d7, c7b7, c7c6, c7c5, c7c4, c7c3, c7c2, h2g3, h2h1, h2g1, d2d8, d2d7, d2d6, d2d5, d2d4, d2d3, d2f2, d2e2, d2c2, d2d1, h3h4, f3f4, g2g3, g2g4\nmove: d2d6\npuzzle_id: tUyWO\nrating: 2735\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 0\n\nposition_fen: r3r1k1/1p2npB1/p1nR2p1/2R1P1Q1/4q1P1/8/5P2/6K1 w - - 0 32\nside_to_move: white\nlegal_moves_uci: g7h8, g7f8, g7h6, g7f6, d6d8, d6d7, d6g6, d6f6, d6e6, d6c6, d6d5, d6d4, d6d3, d6d2, d6d1, g5e7, g5h6, g5g6, g5f6, g5h5, g5f5, g5h4, g5f4, g5e3, g5d2, g5c1, c5c6, c5d5, c5b5, c5a5, c5c4, c5c3, c5c2, c5c1, g1h2, g1f1, e5e6, f2f3, f2f4\nmove: g7f6\npuzzle_id: LtP4r\nrating: 2707\nthemes: ['advantage', 'long', 'master', 'middlegame']\nposition_index: 1\n\nposition_fen: 3Q4/8/4Nrpk/2p4p/3p4/3P2PK/P7/3q4 w - - 10 50\nside_to_move: white\nlegal_moves_uci: d8h8, d8g8, d8f8, d8e8, d8c8, d8b8, d8a8, d8e7, d8d7, d8c7, d8f6, d8d6, d8b6, d8d5, d8a5, d8d4, e6f8, e6g7, e6c7, e6g5, e6c5, e6f4, e6d4, h3h4, h3h2, h3g2, g3g4, a2a3, a2a4\nmove: d8h8\npuzzle_id: yaCn7\nrating: 1871\nthemes: ['anastasiaMate', 'endgame', 'mate', 'mateIn2', 'pin', 'short']\nposition_index: 1","sha256":"e5c0675c0c257666c72c67b8ef62e4f80050aafe509311df50627d042a70861f","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/miprov2/44":{"text":"You are playing a high-stakes chess match where the survival of humanity rests entirely on your shoulders. Analyze the current board position (FEN) and the active side, then carefully select the absolute best winning move from the list of legal UCI moves. Output ONLY the single chosen move in SAN or UCI format. Any error, hesitation, or extra text will result in catastrophic failure.\n\nposition_fen: 6k1/5pb1/4p1pp/2Q1P3/p1P4P/5bB1/PP2qR2/6K1 b - - 1 34\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g7h8, g7f8, g7f6, g7e5, f3a8, f3b7, f3c6, f3h5, f3d5, f3g4, f3e4, f3g2, f3h1, e2e5, e2e4, e2c4, e2e3, e2d3, e2f2, e2d2, e2c2, e2b2, e2f1, e2e1, e2d1, f7f6, h6h5, g6g5, a4a3, f7f5\nmove: e2e1\n\nposition_fen: r4r1k/1p4p1/2n4p/pN1B2n1/2P1p1Q1/P5P1/1PR2q2/3R2K1 w - - 0 25\nside_to_move: white\nlegal_moves_uci: g1h1, c2f2\nmove: c2f2\n\nposition_fen: 7k/ppp4p/8/4p3/4qr2/7P/1PP3R1/3Q3K w - - 2 31\nside_to_move: white\nlegal_moves_uci: h1h2, h1g1, d1d8, d1d7, d1d6, d1h5, d1d5, d1g4, d1d4, d1f3, d1d3, d1e2, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, h3h4, c2c3, b2b3, c2c4, b2b4\nmove: d1d8\n\nposition_fen: r7/p1p3pk/7p/4b3/2PpPP2/7q/PPQ5/R4RK1 b - - 0 28\nside_to_move: black\nlegal_moves_uci: a8h8, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, h7h8, h7g8, h7g6, e5f6, e5d6, e5f4, h3c8, h3d7, h3e6, h3h5, h3f5, h3h4, h3g4, h3g3, h3f3, h3e3, h3d3, h3c3, h3b3, h3a3, h3h2, h3g2, h3h1, h3f1, g7g6, c7c6, a7a6, h6h5, d4d3, g7g5, c7c5, a7a5\nmove: e5f4\npuzzle_id: qcwPi\nrating: 2416\nthemes: ['advantage', 'attraction', 'fork', 'middlegame', 'veryLong']\nposition_index: 2","sha256":"e2f0251551d1b1f6ceba3c6d49d54f45207199c98183c5dbc25e3795e6337638","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/simba/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nWhen presented with a chess position, prioritize looking for immediate mate-in-one or forcing mating sequences. Look at the coordinates of your active pieces (like Queens and Bishops) and identify squares near the opponent's king where they coordinate (such as f7). Always choose the move that delivers checkmate (e.g., `f3f7` placing the Queen on the mating square) over moves that merely attack or capture without mating (e.g., `h5f7`). Double-check that your selected move is legal and maximizes tactical gain.","sha256":"106903fc50f0ad1b5c1df3abd061566af05a2aa7f88e536ae3ee86e97fe80943","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/simba/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nWhen analyzing the FEN and legal moves, always prioritize scanning for immediate checkmate opportunities (mate-in-1) and highly forcing checks. Visualize the position of the opponent's king (e.g., on h6) and check if any of the legal moves (like `d8h4`) put the king in check with no legal escapes. Avoid choosing passive or non-forcing moves (such as `d8f8`) when a direct forcing tactic or checkmate sequence is available.\n\nposition_fen: rn1q1b1r/pp2p2p/1n1pb2k/2p3pP/8/2P1Q3/PP1P1PP1/RNB1K2R w KQ g6 0 14\nside_to_move: white\nlegal_moves_uci: e3e6, e3g5, e3e5, e3c5, e3f4, e3e4, e3d4, e3h3, e3g3, e3f3, e3d3, e3e2, h1h4, h1h3, h1h2, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, g2g3, f2f3, d2d3, b2b3, a2a3, g2g4, f2f4, d2d4, b2b4, a2a4, h5g6\nmove: e3e6","sha256":"15523eded5a3d7853dbc4de41f325daf3ea8a7f78cefeae685a70f850d794356","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-4o-mini/simba/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 6r1/kPQ1r2p/p4b2/6p1/3pp3/7P/5PP1/6K1 w - - 1 34\nside_to_move: white\nlegal_moves_uci: c7d8, c7c8, c7b8, c7e7, c7d7, c7d6, c7c6, c7b6, c7e5, c7c5, c7a5, c7f4, c7c4, c7g3, c7c3, c7h2, c7c2, c7c1, g1h2, g1h1, g1f1, b7b8q, b7b8r, b7b8b, b7b8n, h3h4, g2g3, f2f3, g2g4, f2f4\nmove: b7b8q","sha256":"95a28f4dd78e5dd49addb327e9ce1d1e6b75b5bdf1d6b5aa4048c3f0524c355c","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/bfs/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 2r2b2/7k/1p2p1p1/3pPpPp/1PrR1P1P/2P5/3B1K2/2R5 b - - 0 36\nside_to_move: black\nlegal_moves_uci: f8g7, f8e7, f8h6, f8d6, f8c5, f8b4, c8e8, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, h7h8, h7g8, h7g7, c4c7, c4c6, c4c5, c4d4, c4b4, c4c3, b6b5\nmove: c4d4\n\nposition_fen: 3r1r1k/pp2qppp/2p5/3bP1RP/8/1P2Q3/P1P2P2/1K4R1 w - - 2 26\nside_to_move: white\nlegal_moves_uci: g5g7, g5g6, g5f5, g5g4, g5g3, g5g2, e3a7, e3b6, e3c5, e3f4, e3e4, e3d4, e3h3, e3g3, e3f3, e3d3, e3c3, e3e2, e3d2, e3e1, e3c1, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, g1c1, b1b2, b1c1, b1a1, h5h6, e5e6, b3b4, f2f3, c2c3, a2a3, f2f4, c2c4, a2a4\nmove: g5g7\n\nposition_fen: r5rk/p1p2p1p/1p1p2qp/4p3/2P1R2b/3P2NP/P1P2PP1/1R1Q2K1 w - - 4 21\nside_to_move: white\nlegal_moves_uci: e4e5, e4h4, e4g4, e4f4, e4d4, e4e3, e4e2, e4e1, g3h5, g3f5, g3e2, g3h1, g3f1, g1h2, g1h1, g1f1, d1h5, d1g4, d1f3, d1e2, d1d2, d1f1, d1e1, d1c1, b1b6, b1b5, b1b4, b1b3, b1b2, b1c1, b1a1, c4c5, d3d4, f2f3, c2c3, a2a3, f2f4, a2a4\nmove: e4h4\n\nposition_fen: 8/4q1kp/p2p2p1/2b4n/P7/1Q5P/B1P3KB/1R6 b - - 0 27\nside_to_move: black\nlegal_moves_uci: g7h8, g7f8, g7h6, g7f6, e7f8, e7e8, e7d8, e7f7, e7d7, e7c7, e7b7, e7a7, e7f6, e7e6, e7g5, e7e5, e7h4, e7e4, e7e3, e7e2, e7e1, h5f6, h5f4, h5g3, c5a7, c5b6, c5d4, c5b4, c5e3, c5a3, c5f2, c5g1, h7h6, g6g5, d6d5, a6a5\nmove: e7e2\n\nposition_fen: 7r/5k2/2p2b2/2p2P2/2P3K1/5RN1/7P/8 b - - 8 46\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, f7g8, f7f8, f7e8, f7g7, f7e7, f6d8, f6g7, f6e7, f6g5, f6e5, f6h4, f6d4, f6c3, f6b2, f6a1\nmove: h8h4\npuzzle_id: LPIS0\nrating: 2432\nthemes: ['endgame', 'long', 'mate', 'mateIn3', 'operaMate']\nposition_index: 2\n\nposition_fen: r6R/pq1k1p2/1p2b1p1/3P1pb1/6p1/BP1Q2P1/P1B2PK1/8 w - - 5 30\nside_to_move: white\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, h8h1, d3a6, d3f5, d3b5, d3e4, d3d4, d3c4, d3f3, d3e3, d3c3, d3e2, d3d2, d3f1, d3d1, a3f8, a3e7, a3d6, a3c5, a3b4, a3b2, a3c1, g2h2, g2h1, g2g1, g2f1, c2d1, c2b1, b3b4, f2f3, f2f4\nmove: d3b5\npuzzle_id: FZqMM\nrating: 2222\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 6k1/1p1P1p2/4p1p1/P1Rp3p/1P3P2/2Q3KP/6P1/3q2b1 b - - 2 34\nside_to_move: black\nlegal_moves_uci: g8f8, g8h7, g1c5, g1d4, g1e3, g1h2, g1f2, d1g4, d1d4, d1a4, d1f3, d1d3, d1b3, d1e2, d1d2, d1c2, d1f1, d1e1, d1c1, d1b1, d1a1, f7f6, b7b6, g6g5, e6e5, h5h4, d5d4, f7f5, b7b5\nmove: h5h4\npuzzle_id: tyHzQ\nrating: 2434\nthemes: ['attraction', 'endgame', 'fork', 'mate', 'mateIn5', 'veryLong']\nposition_index: 1\n\nposition_fen: 1r3r1k/5ppB/p7/6P1/1p1p1q1Q/6N1/PPP5/1K1b4 w - - 0 31\nside_to_move: white\nlegal_moves_uci: h7g8, h7g6, h7f5, h7e4, h7d3, h4h6, h4h5, h4g4, h4f4, h4h3, h4h2, h4h1, g3h5, g3f5, g3e4, g3e2, g3h1, g3f1, b1a1, g5g6, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: h4f4\npuzzle_id: 4dQTV\nrating: 2685\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: 3k4/7r/1b4B1/8/4pnP1/8/5R2/2R3K1 b - - 15 57\nside_to_move: black\nlegal_moves_uci: d8e7, d8d7, h7h8, h7g7, h7f7, h7e7, h7d7, h7c7, h7b7, h7a7, h7h6, h7h5, h7h4, h7h3, h7h2, h7h1, b6c7, b6a7, b6c5, b6a5, b6d4, b6e3, b6f2, f4g6, f4e6, f4h5, f4d5, f4h3, f4d3, f4g2, f4e2, e4e3\nmove: f4g6\npuzzle_id: 4WNM9\nrating: 2668\nthemes: ['crushing', 'endgame', 'exposedKing', 'master', 'pin', 'veryLong']\nposition_index: 1\n\nposition_fen: 5rk1/p4p2/3Q2p1/5q1p/6P1/5P1K/7P/4R2R b - - 0 35\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8g7, f8e8, f8d8, f8c8, f8b8, f8a8, f5c8, f5d7, f5f6, f5e6, f5g5, f5e5, f5d5, f5c5, f5b5, f5a5, f5g4, f5f4, f5e4, f5f3, f5d3, f5c2, f5b1, h5g4, f7f6, a7a6, g6g5, h5h4, a7a5\nmove: f5f3\npuzzle_id: 6ziXy\nrating: 2213\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: r7/5k2/pp1p1ppp/2pP4/2P2q2/2PB3Q/P1K5/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h3c8, h3d7, h3h6, h3e6, h3h5, h3f5, h3h4, h3g4, h3g3, h3f3, h3e3, h3h2, h3g2, h3h1, h3f1, d3g6, d3f5, d3e4, d3e2, d3f1, c2b3, c2b2, c2d1, c2b1, a2a3, a2a4\nmove: h3d7\npuzzle_id: 5nfOl\nrating: 2156\nthemes: ['attraction', 'crushing', 'deflection', 'endgame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 4r1k1/rp3ppp/p7/P2N4/3P1q2/QP1np2P/2R2PP1/1N3K1R b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, a7a8, f4b8, f4c7, f4h6, f4f6, f4d6, f4g5, f4f5, f4e5, f4h4, f4g4, f4e4, f4d4, f4g3, f4f3, f4h2, f4f2, d3e5, d3c5, d3b4, d3f2, d3b2, d3e1, d3c1, e3f2, h7h6, g7g6, f7f6, b7b6, e3e2, h7h5, g7g5, f7f5, b7b5\nmove: e3e2\npuzzle_id: 3Mg46\nrating: 2418\nthemes: ['advancedPawn', 'long', 'master', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 0\n\nposition_fen: 5rk1/3Q4/2p5/3p4/6p1/1P2r2q/P6p/2RK2R1 w - - 0 36\nside_to_move: white\nlegal_moves_uci: d7e8, d7d8, d7c8, d7h7, d7g7, d7f7, d7e7, d7c7, d7b7, d7a7, d7e6, d7d6, d7c6, d7f5, d7d5, d7g4, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, d1d2, d1c2, c1c6, c1c5, c1c4, c1c3, c1c2, c1b1, c1a1, b3b4, a2a3, a2a4\nmove: g1g4\npuzzle_id: CNFx5\nrating: 1127\nthemes: ['crushing', 'endgame', 'short']\nposition_index: 0\n\nposition_fen: r4r2/5p1k/p2p4/q3nN2/1p4Q1/8/PPP5/2K2nN1 w - - 2 29\nside_to_move: white\nlegal_moves_uci: f5g7, f5e7, f5h6, f5d6, f5h4, f5d4, f5g3, f5e3, g4g8, g4g7, g4g6, g4h5, g4g5, g4h4, g4f4, g4e4, g4d4, g4c4, g4b4, g4h3, g4g3, g4f3, g4g2, g4e2, g4d1, g1h3, g1f3, g1e2, c1d1, c1b1, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: g4g7\npuzzle_id: GJCXh\nrating: 2676\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'veryLong']\nposition_index: 4\n\nposition_fen: r2r2kb/pp2pp1p/2q2npB/4p3/8/2N5/PPPQ1PPP/3R1RK1 w - - 0 15\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, h6g5, h6f4, h6e3, c3d5, c3b5, c3e4, c3a4, c3e2, c3b1, d2d8, d2d7, d2d6, d2g5, d2d5, d2f4, d2d4, d2e3, d2d3, d2e2, d2e1, d2c1, g1h1, f1e1, d1e1, d1c1, d1b1, d1a1, h2h3, g2g3, f2f3, b2b3, a2a3, h2h4, g2g4, f2f4, b2b4, a2a4\nmove: d2d8\npuzzle_id: XLka2\nrating: 640\nthemes: ['crushing', 'kingsideAttack', 'middlegame', 'short']\nposition_index: 0","sha256":"b84c1f8ccedae49e31a5fc6fd0bc5b18292bffc50e40ca3f3131cc5669197c7f","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/bfs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 8/3r1pkp/P5p1/2b1R3/2P1P3/8/2R3PP/7K b - - 1 43\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, g7f6, d7d8, d7e7, d7c7, d7b7, d7a7, d7d6, d7d5, d7d4, d7d3, d7d2, d7d1, c5f8, c5e7, c5a7, c5d6, c5b6, c5d4, c5b4, c5e3, c5a3, c5f2, c5g1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: d7d1\n\nposition_fen: 7r/1p1kn3/8/1N1P1p2/8/4Ppp1/PP1RK1Pr/4N3 w - - 0 31\nside_to_move: white\nlegal_moves_uci: e2f3, e2d3, e2f1, e2d1, e1f3\nmove: e2f3\n\nposition_fen: 8/8/8/7P/5p2/8/4K1kP/8 b - - 0 52\nside_to_move: black\nlegal_moves_uci: g2h3, g2h2, g2h1, g2g1, f4f3\nmove: f4f3\n\nposition_fen: 8/5Q2/6p1/6k1/8/6PK/5P1P/1q6 b - - 0 46\nside_to_move: black\nlegal_moves_uci: g5h6, g5h5, b1b8, b1b7, b1b6, b1f5, b1b5, b1e4, b1b4, b1d3, b1b3, b1c2, b1b2, b1a2, b1h1, b1g1, b1f1, b1e1, b1d1, b1c1, b1a1\nmove: b1f1\n\nposition_fen: 3r4/5k2/8/1p2PKp1/pP1N2P1/6p1/1P4P1/8 w - - 4 33\nside_to_move: white\nlegal_moves_uci: f5g5, f5e4, d4e6, d4c6, d4b5, d4f3, d4b3, d4e2, d4c2, e5e6, b2b3\nmove: e5e6\npuzzle_id: 5eBes\nrating: 2381\nthemes: ['crushing', 'endgame', 'veryLong', 'zugzwang']\nposition_index: 0\n\nposition_fen: 5rkr/pp2q1p1/4n1Q1/3nPR1p/4N3/8/PP4PP/5R1K w - - 8 24\nside_to_move: white\nlegal_moves_uci: g6e8, g6h7, g6g7, g6f7, g6h6, g6f6, g6e6, g6h5, g6g5, g6g4, g6g3, f5f8, f5f7, f5f6, f5h5, f5g5, f5f4, f5f3, f5f2, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h1g1, f1f4, f1f3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: g6e6\npuzzle_id: 4uOji\nrating: 2195\nthemes: ['crushing', 'deflection', 'fork', 'master', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: Rn4k1/6pp/3p4/1B1Pq3/1PN1n3/7P/2P2RK1/3Q4 b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e5e8, e5e7, e5f6, e5e6, e5h5, e5g5, e5f5, e5d5, e5f4, e5d4, e5g3, e5c3, e5h2, e5b2, e5a1, e4f6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h7h6, g7g6, h7h5, g7g5\nmove: e5g3\npuzzle_id: u5Z6U\nrating: 2563\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: 8/6nk/p3p2p/1b1pNp1N/1b1P1P1P/4q3/6PK/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h5g7, h5f6, h5g3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, h2h1, g2g3, g2g4\nmove: h5f6\npuzzle_id: saT5n\nrating: 2740\nthemes: ['long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 7r/5pk1/3p1P2/1p4q1/3p4/PQ1B4/1P3p2/5K1R b - - 0 46\nside_to_move: black\nlegal_moves_uci: g7g8, g7f8, g7f6, g5f6\nmove: g7f6\npuzzle_id: xAiWS\nrating: 2314\nthemes: ['advantage', 'endgame', 'exposedKing', 'long', 'skewer']\nposition_index: 0\n\nposition_fen: 7k/p5pp/3p4/2p1p3/2P3q1/1PQ2rP1/P4n1P/2B1KR2 w - - 0 28\nside_to_move: white\nlegal_moves_uci: c3e5, c3a5, c3d4, c3b4, c3f3, c3e3, c3d3, c3d2, c3c2, c3b2, c3a1, f1f2, f1h1, f1g1, e1e2, e1d2, c1h6, c1g5, c1f4, c1e3, c1a3, c1d2, c1b2, b3b4, h2h3, a2a3, h2h4, a2a4\nmove: f1f2\npuzzle_id: KXgrS\nrating: 2165\nthemes: ['advantage', 'long', 'middlegame']\nposition_index: 2\n\nposition_fen: 6n1/1p4Pk/2p1N2P/p5K1/8/8/8/8 w - - 1 53\nside_to_move: white\nlegal_moves_uci: e6f8, e6d8, e6c7, e6c5, e6f4, e6d4, g5h5, g5f5, g5h4, g5g4, g5f4\nmove: e6f8\npuzzle_id: mZF9a\nrating: 513\nthemes: ['endgame', 'knightEndgame', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0\n\nposition_fen: 4rr2/p7/1p3k1p/2p1Rp2/6p1/P7/1P3PPP/4RK2 w - - 5 26\nside_to_move: white\nlegal_moves_uci: e5e8, e5e7, e5e6, e5f5, e5d5, e5c5, e5e4, e5e3, e5e2, f1e2, f1g1, e1e4, e1e3, e1e2, e1d1, e1c1, e1b1, e1a1, a3a4, h2h3, g2g3, f2f3, b2b3, h2h4, f2f4, b2b4\nmove: e5e8\npuzzle_id: vOxk6\nrating: 939\nthemes: ['crushing', 'endgame', 'rookEndgame', 'short']\nposition_index: 0\n\nposition_fen: 1r5k/p5p1/6Pp/Q6P/8/8/P4P2/KR1r4 b - - 2 40\nside_to_move: black\nlegal_moves_uci: h8g8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1h1, d1g1, d1f1, d1e1, d1c1, d1b1, a7a6\nmove: d1b1\npuzzle_id: TMIoF\nrating: 1117\nthemes: ['endgame', 'mate', 'mateIn2', 'queenRookEndgame', 'short']\nposition_index: 1\n\nposition_fen: 1R6/4k3/7r/2p3K1/4p3/8/8/8 w - - 0 53\nside_to_move: white\nlegal_moves_uci: b8h8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, g5h6, g5f5, g5g4, g5f4\nmove: g5h6\npuzzle_id: 0ErLd\nrating: 2296\nthemes: ['crushing', 'endgame', 'exposedKing', 'rookEndgame', 'veryLong']\nposition_index: 3\n\nposition_fen: Q2qkb1r/p2bpppp/8/1B1P4/4nB2/4PK2/PP1p1PPP/n5NR w k - 1 16\nside_to_move: white\nlegal_moves_uci: a8d8, a8c8, a8b8, a8b7, a8a7, a8c6, b5d7, b5c6, b5a6, b5c4, b5a4, b5d3, b5e2, b5f1, f4b8, f4c7, f4h6, f4d6, f4g5, f4e5, f4g3, f3e4, f3e2, g1h3, g1e2, d5d6, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: b5d7\npuzzle_id: lQxX8\nrating: 2532\nthemes: ['attraction', 'clearance', 'fork', 'mate', 'mateIn5', 'middlegame', 'pin', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: 1k6/1P6/1K6/6B1/6P1/8/8/4q3 w - - 0 56\nside_to_move: white\nlegal_moves_uci: b6c6, b6a6, b6c5, b6b5, g5d8, g5e7, g5h6, g5f6, g5h4, g5f4, g5e3, g5d2, g5c1\nmove: g5f4\npuzzle_id: Nx8za\nrating: 836\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 0","sha256":"dd58d45945189596c4d74ce302e988ddf1a7da9c9f6786a4249233a73e693478","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/bfs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 6k1/5pp1/p3p2p/8/4n3/1BP5/PP2KPP1/4R2q w - - 0 35\nside_to_move: white\nlegal_moves_uci: b3e6, b3d5, b3c4, b3a4, b3c2, b3d1, e2f3, e2e3, e2d3, e2d1, e1h1, e1g1, e1f1, e1d1, e1c1, e1b1, e1a1, c3c4, g2g3, f2f3, a2a3, g2g4, f2f4, a2a4\nmove: e1h1\n\nposition_fen: 3r4/1p1q2k1/p3n1p1/4Pp1Q/3p4/P6P/1P1r4/6RK w - - 0 47\nside_to_move: white\nlegal_moves_uci: h5h8, h5h7, h5h6, h5g6, h5g5, h5f5, h5h4, h5g4, h5f3, h5e2, h5d1, g1g6, g1g5, g1g4, g1g3, g1g2, g1f1, g1e1, g1d1, g1c1, g1b1, g1a1, h3h4, a3a4, b2b3, b2b4\nmove: g1g6\n\nposition_fen: 3r1k2/1p1q4/p3n1R1/4Pp1Q/3p4/P6P/1P1r4/7K w - - 1 48\nside_to_move: white\nlegal_moves_uci: g6g8, g6g7, g6h6, g6f6, g6e6, g6g5, g6g4, g6g3, g6g2, g6g1, h5h8, h5h7, h5h6, h5g5, h5f5, h5h4, h5g4, h5f3, h5e2, h5d1, h1g1, h3h4, a3a4, b2b3, b2b4\nmove: h5h8\n\nposition_fen: 3rk3/1p1q4/p3nQR1/4Pp2/3p4/P6P/1P1r4/7K w - - 5 50\nside_to_move: white\nlegal_moves_uci: g6g8, g6g7, g6h6, g6g5, g6g4, g6g3, g6g2, g6g1, f6h8, f6f8, f6d8, f6g7, f6f7, f6e7, f6e6, f6g5, f6f5, f6h4, h1g1, h3h4, a3a4, b2b3, b2b4\nmove: g6g8\n\nposition_fen: r3r1k1/1p1qbppp/p1n5/2pp1N2/6N1/2PP3P/PP3PP1/R2QR1K1 b - - 6 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, a8d8, a8c8, a8b8, a8a7, e7f8, e7d8, e7f6, e7d6, e7g5, e7h4, d7d8, d7c8, d7c7, d7e6, d7d6, d7f5, c6d8, c6b8, c6a7, c6e5, c6a5, c6d4, c6b4, h7h6, g7g6, f7f6, b7b6, a6a5, d5d4, c5c4, h7h5, g7g5, b7b5\nmove: d7f5\npuzzle_id: DmJlo\nrating: 792\nthemes: ['advantage', 'hangingPiece', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: 3r1rk1/4R2p/p4bp1/1p3p2/4QPP1/8/P4q1P/3R3K w - - 0 29\nside_to_move: white\nlegal_moves_uci: e7e8, e7h7, e7g7, e7f7, e7d7, e7c7, e7b7, e7a7, e7e6, e7e5, e4a8, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4d4, e4c4, e4b4, e4a4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, e4b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, g4f5, g4g5, h2h3, a2a3, h2h4, a2a4\nmove: e4e6\npuzzle_id: 0PhbW\nrating: 2606\nthemes: ['deflection', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 7k/3n2p1/4Q2p/3p2N1/8/3q4/1P3KPP/r3B3 w - - 0 29\nside_to_move: white\nlegal_moves_uci: e6g8, e6e8, e6f7, e6e7, e6d7, e6h6, e6g6, e6f6, e6d6, e6c6, e6b6, e6a6, e6f5, e6e5, e6d5, e6g4, e6e4, e6h3, e6e3, e6e2, g5h7, g5f7, g5e4, g5h3, g5f3, f2g1, e1a5, e1b4, e1c3, e1d2, h2h3, g2g3, b2b3, h2h4, g2g4, b2b4\nmove: e6e8\npuzzle_id: vyvus\nrating: 1408\nthemes: ['endgame', 'fork', 'mate', 'mateIn2', 'short']\nposition_index: 0\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb2k/2p4P/8/2P2Q2/PP1P1PP1/RNB1K2R w KQ - 1 13\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1h4, h1h3, h1h2, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, g2g3, d2d3, b2b3, a2a3, g2g4, d2d4, b2b4, a2a4\nmove: f3e3\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 2\n\nposition_fen: 4k3/2p3R1/2p1PK2/5r2/p2P4/r7/8/B7 w - - 0 47\nside_to_move: white\nlegal_moves_uci: f6g6, f6f5\nmove: f6f5\npuzzle_id: 52eVA\nrating: 2338\nthemes: ['crushing', 'defensiveMove', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: 1r4RQ/p5r1/2n1pk1p/5p1q/2PP4/5P2/P4P1P/R6K w - - 6 31\nside_to_move: white\nlegal_moves_uci: h8h7, h8g7, h8h6, g8f8, g8e8, g8d8, g8c8, g8b8, g8g7, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, d4d5, c4c5, f3f4, h2h3, a2a3, h2h4, a2a4\nmove: h8g7\npuzzle_id: C9c6a\nrating: 2054\nthemes: ['discoveredAttack', 'discoveredCheck', 'exposedKing', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: rn3rk1/4b2p/6pB/pp1p2N1/8/P5nP/1P3PP1/R3R1K1 w - - 0 29\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, g5h7, g5f7, g5e6, g5e4, g5f3, g1h2, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, a1a2, a1d1, a1c1, a1b1, f2g3, h3h4, a3a4, f2f3, b2b3, f2f4, b2b4\nmove: e1e7\npuzzle_id: mPgSs\nrating: 2619\nthemes: ['crushing', 'discoveredAttack', 'discoveredCheck', 'kingsideAttack', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: r4rk1/ppp2pq1/3p2p1/3Np1n1/3nP1pQ/8/PPP2P2/1K3B1R w - - 4 19\nside_to_move: white\nlegal_moves_uci: d5e7, d5c7, d5f6, d5b6, d5f4, d5b4, d5e3, d5c3, h4h8, h4h7, h4h6, h4h5, h4g5, h4g4, h4h3, h4g3, h4h2, h1h3, h1h2, h1g1, f1a6, f1b5, f1c4, f1h3, f1d3, f1g2, f1e2, b1c1, b1a1, f2f3, c2c3, b2b3, a2a3, f2f4, c2c4, b2b4, a2a4\nmove: d5e7\npuzzle_id: m17EB\nrating: 1277\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 8/5pkp/2BR2p1/1pP1p3/1P5q/3QP2P/5P1K/r7 b - - 0 32\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, h4d8, h4e7, h4h6, h4f6, h4h5, h4g5, h4g4, h4f4, h4e4, h4d4, h4c4, h4b4, h4h3, h4g3, h4f2, a1a8, a1a7, a1a6, a1a5, a1a4, a1a3, a1a2, a1h1, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, h7h6, f7f6, g6g5, e5e4, h7h5, f7f5\nmove: h4f2\npuzzle_id: HNck2\nrating: 2516\nthemes: ['advantage', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb3/2p3k1/8/2P2Q2/PP1P1PPP/RNB1K2R w KQ - 0 11\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3h5, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, h2h3, g2g3, d2d3, b2b3, a2a3, h2h4, g2g4, d2d4, b2b4, a2a4\nmove: h2h4\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 0\n\nposition_fen: r5k1/3n1pbp/6p1/8/3Bq3/1P5P/P1RQ2P1/1K5R b - - 3 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, a8a6, a8a5, a8a4, a8a3, a8a2, g7h8, g7f8, g7h6, g7f6, g7e5, g7d4, d7f8, d7b8, d7f6, d7b6, d7e5, d7c5, e4e8, e4e7, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4h4, e4g4, e4f4, e4d4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: g7d4\npuzzle_id: uHEok\nrating: 1301\nthemes: ['crushing', 'discoveredAttack', 'middlegame', 'short']\nposition_index: 1","sha256":"8ac2d83eb2954896af8e449945f4ee0228e17107c2b99d2168452c41bcf223e7","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/brs/42":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":true,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/brs/43":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":true,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/brs/44":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":true,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/copro/42":{"text":"Act as an expert chess solver. Solve the chess puzzle by finding the single objectively best move for the active player. Express your answer in Standard Algebraic Notation (SAN).","sha256":"df2d31015443351dc8d979818472d4c7dae06227dcdcba0a575eabbdc7d467ae","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/copro/43":{"text":"Analyze the chess position and identify the single best move for the side to play. Your output must be exactly one move in Standard Algebraic Notation (SAN) without any explanation or conversational text.","sha256":"0c7471ee639700d05983f60b1573ffac3146bd5363ad470169fbd7524250072c","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/copro/44":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/gepa/42":{"text":"# Chess Puzzle Solver Instructions\n\nYour task is to solve a chess puzzle by finding the single best tactical move for the active side. \n\n## Inputs Provided\n1. **`position_fen`**: The board state represented in Forsyth-Edwards Notation (FEN).\n2. **`side_to_move`**: The player whose turn it is to move (`white` or `black`).\n3. **`legal_moves_uci`**: A comma-separated list of all legal moves available in Universal Chess Interface (UCI) notation (e.g., `e2e4`, `g8f6`).\n\n## Tactical Evaluation Strategy\n\nTo find the absolute best move, you must perform a disciplined mental calculation of the board state. Avoid making intuitive or \"hope chess\" moves (such as giving random, non-forcing checks). Instead, systematically analyze the position using this step-by-step tactical protocol:\n\n### Step 1: Identify Tactical Targets & Vulnerabilities\n*   **King Safety**: Is either king exposed? Are there back-rank weaknesses, weak f2/f7 squares, or open files/diagonals leading to the king?\n*   **Hanging/Undefended Pieces**: Identify which pieces of both sides are completely undefended or insufficiently defended (overloaded defenders).\n*   **Pins and Alignments**: Look for pieces aligned on the same file, rank, or diagonal (e.g., Queen and King alignment, Rook and Rook alignment).\n\n### Step 2: Generate Candidate Moves (C-C-T)\nFocus strictly on forcing moves in order of priority:\n1.  **Checks**: Every legal check must be calculated to its conclusion.\n2.  **Captures**: Look at all possible captures, especially those that win material or disrupt the opponent's pawn structure.\n3.  **Threats**: Moves that create immediate, unavoidable threats (e.g., threatening mate, attacking a higher-value piece, or creating a fork).\n\n### Step 3: Deep Calculation and the \"Best Reply\" Rule\nNever assume your opponent will make a mistake. For every candidate move you evaluate:\n*   Calculate the opponent's **absolute best reply** (their most forcing defense, counter-check, or counter-capture).\n*   If your candidate move allows the opponent to escape, capture your attacking piece safely, or launch a devastating counter-attack, discard it immediately.\n*   Compare the final material and positional balance at the end of each calculated line. The winning line will leave you with a clear material advantage (e.g., winning a piece, an exchange, or a queen) or forced checkmate.\n\n### Step 4: Watch Out for Critical Tactical Motifs\n*   **Zwischenzug (Intermediate Move)**: Before executing a recapture or an exchange, check if you have an intermediate move (like a forcing check) that saves your threatened piece or improves your position with tempo first (e.g., checking the king to move your queen out of danger before capturing an enemy piece).\n*   **Liquidation & Simplification**: Look for forcing trades (such as trading rooks) that remove defenders and leave other enemy pieces hanging or undefended.\n*   **Avoid \"Useless Checks\"**: Do not give a check just because it is available. If a check allows the opponent's king to simply step aside to safety while you lose your attacking piece or lose tempo, it is a blunder.\n\n### Step 5: Select and Verify\n*   Cross-reference your chosen tactical move with the `legal_moves_uci` list. \n*   Verify that your move is spelled exactly as it appears in the list.\n\n## Output Format\n- Output **only** the single best move in UCI format (exactly as it appears in the `legal_moves_uci` list).\n- Do not include any conversational text, explanations, analysis, or punctuation. Your response must be strictly a single word/string representing the move (e.g., `f3f7` or `c2g2`).","sha256":"7f13e2184e9641e6c82b51775b9c023003820477b23ae594fc93634d82117117","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/gepa/43":{"text":"You are a grandmaster-level chess engine. Your task is to solve the chess puzzle by finding the single best legal move for the active side.\n\n### Inputs\nYou will be provided with the following three inputs:\n1. **position_fen**: The Forsyth-Edwards Notation (FEN) string representing the current state of the chessboard.\n2. **side_to_move**: The side whose turn it is to play (\"white\" or \"black\").\n3. **legal_moves_uci**: A comma-separated list of all legal moves available to the active side in Universal Chess Interface (UCI) format (e.g., e2e4, g4g3).\n\n### Strategy and Tactical Guidelines\nTo find the correct winning or saving move, apply a rigorous chess engine-like search algorithm. You must mentally execute the following analytical steps before selecting your move:\n\n1. **Verify Legality**: Your selected move must be chosen strictly from the provided `legal_moves_uci` list.\n\n2. **Differentiate Similar-Looking Moves**:\n   - Pay extreme attention to the starting squares of your pieces. \n   - If multiple pieces can move to or capture on the same destination square (e.g., a Rook moving to f2 via `f8f2` vs. a Queen moving to f2 via `h4f2`), **do not treat them as equivalent**. Evaluate each move as an entirely independent branch. One may lead to a forced mate, while the other might be a blunder.\n\n3. **Exhaustive Calculation of All Checks**:\n   - Identify every legal checking move in the `legal_moves_uci` list.\n   - For **every single check**, calculate the full variation tree to its absolute end-state (either checkmate, a draw, or a quiet position with static material evaluation).\n   - Assume the opponent plays the most resilient, optimal defense at every step of your calculation.\n   - Compare the final evaluations of each check branch. Prioritize the branch that leads to the fastest forced checkmate.\n\n4. **Prioritize Mating Attacks over Material**:\n   - If a forcing sequence (mating net, back-rank mate, or king hunt) exists, prioritize it absolutely. \n   - Do not make a slow material capture if a forcing checkmate sequence is available.\n\n5. **Evaluate Decisive Captures and Threats**:\n   - If no forcing checkmate sequence exists, calculate captures that win decisive material or eliminate key defensive pieces.\n   - Ensure your chosen move does not allow the opponent an immediate, devastating counter-attack.\n\n### Output Format\nYour output must be extremely concise and contain only the selected best move under the `### move` header. Do not include any explanations, thoughts, chess notation analysis, or conversational filler.\n\nFormat your response exactly as follows:\n### move\n[uci_move]","sha256":"b956fe7d939b18e875ccc3fa6126620bb530e53fe6bd4c36a272eafac2e07262","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/gepa/44":{"text":"You are an expert chess engine and grandmaster. Your task is to solve chess puzzles by finding the single best move from a given position.\n\n### Inputs\nYou will be provided with the following inputs:\n- `position_fen`: The current board state represented in Forsyth-Edwards Notation (FEN).\n- `side_to_move`: The color of the player whose turn it is ('white' or 'black').\n- `legal_moves_uci`: A comma-separated list of all legal moves available in the current position, formatted in Universal Chess Interface (UCI) notation (e.g., `e2e4`, `g8f6`).\n\n### Tactical Analysis Guidelines\nTo find the correct tactical solution, you must perform a rigorous and deep calculation. Do not rely on shallow heuristics or immediate visual appeal. Follow this systematic process:\n\n1. **Visualize and Assess the Board**: \n   Analyze the FEN to understand the material balance, king safety, pawn structures, and any immediate tactical threats (e.g., passed pawns close to promotion, weak back ranks, unprotected pieces).\n\n2. **Generate and Prioritize Candidate Moves**:\n   Focus heavily on forcing moves from the `legal_moves_uci` list:\n   - **Checks**: Direct checks, double checks, and discovered checks.\n   - **Captures**: Winning material or initiating tactical exchanges.\n   - **Threats**: Creating unstoppable mating nets or attacking high-value pieces.\n\n3. **Perform Deep Calculation & Search Tree Verification**:\n   For *each* promising candidate move, calculate the tree of variations at least 3-5 plies deep (move-reply-move-reply). \n   - **Do not assume the first forcing move you see is correct.** (e.g., Pushing a pawn to the 7th rank may look strong but can fail to simple blockades; a flashy double-check might allow the king to escape, whereas a different discovered check might force a perpetual draw or mate).\n   - **Actively search for the opponent's best defensive resources.** Assume your opponent will play the absolute best defensive move, block, or counter-attack. If the opponent has even a single resource that neutralizes your line, discard your candidate move.\n   - **Compare forcing options.** If you have multiple checks or captures, calculate all of them. Prioritize the one that forces a decisive, irreversible advantage (like mate or winning a major piece) over one that merely wins minor material or allows the opponent to escape.\n\n4. **Select the Decisive Move**:\n   The single \"best move\" is the unique move that:\n   - Forces a checkmate.\n   - Wins decisive material.\n   - Successfully saves an otherwise lost position by forcing a draw (e.g., via perpetual check) when you are down in material.\n\n### Output Format\nIdentify the single best move from the `legal_moves_uci` list and output it.\nYour output must be concise and contain **only** the UCI string of the single best move under the appropriate header. Do not include any explanations, commentary, or analysis.\n\nExample Output:\n### move\ne2e4","sha256":"6fb2bf8bc5821a1b8c15dc5847b918e74b96c603948ef02e28df52700f0063f7","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/miprov2/42":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/miprov2/43":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/miprov2/44":{"text":"Analyze the given chess position (FEN) and the active player to identify the optimal tactical or strategic move. Evaluate threats, captures, and opportunities, then select the single best move directly from the provided list of legal UCI moves. Your response must contain only this selected move, with absolutely no commentary, analysis, or explanation.","sha256":"20445b2751aa2bd8fc610c68ce49d866621414187bb46f76c841951f227191b2","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/simba/42":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":true,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/simba/43":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":true,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gpt-5-6-luna/simba/44":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":true,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/bfs/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 2r2b2/7k/1p2p1p1/3pPpPp/1P1P1P1P/8/3B1K2/2R5 b - - 0 37\nside_to_move: black\nlegal_moves_uci: f8g7, f8e7, f8h6, f8d6, f8c5, f8b4, c8e8, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, c8c4, c8c3, c8c2, c8c1, h7h8, h7g8, h7g7, b6b5\nmove: c8c1\n\nposition_fen: 5b2/7k/1p2p1p1/3pPpPp/1P1P1P1P/8/5K2/2B5 b - - 0 38\nside_to_move: black\nlegal_moves_uci: f8g7, f8e7, f8h6, f8d6, f8c5, f8b4, h7h8, h7g8, h7g7, b6b5\nmove: f8b4\n\nposition_fen: 8/7k/1p2p1p1/3pPpPp/3P1P1P/2bK4/8/2B5 b - - 3 40\nside_to_move: black\nlegal_moves_uci: h7h8, h7g8, h7g7, c3a5, c3d4, c3b4, c3d2, c3b2, c3e1, c3a1, b6b5\nmove: c3e1\n\nposition_fen: 3r1r1k/pp2qppp/2p5/3bP1RP/8/1P2Q3/P1P2P2/1K4R1 w - - 2 26\nside_to_move: white\nlegal_moves_uci: g5g7, g5g6, g5f5, g5g4, g5g3, g5g2, e3a7, e3b6, e3c5, e3f4, e3e4, e3d4, e3h3, e3g3, e3f3, e3d3, e3c3, e3e2, e3d2, e3e1, e3c1, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, g1c1, b1b2, b1c1, b1a1, h5h6, e5e6, b3b4, f2f3, c2c3, a2a3, f2f4, c2c4, a2a4\nmove: g5g7\n\nposition_fen: 7r/5k2/2p2b2/2p2P2/2P3K1/5RN1/7P/8 b - - 8 46\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, f7g8, f7f8, f7e8, f7g7, f7e7, f6d8, f6g7, f6e7, f6g5, f6e5, f6h4, f6d4, f6c3, f6b2, f6a1\nmove: h8h4\npuzzle_id: LPIS0\nrating: 2432\nthemes: ['endgame', 'long', 'mate', 'mateIn3', 'operaMate']\nposition_index: 2\n\nposition_fen: r6R/pq1k1p2/1p2b1p1/3P1pb1/6p1/BP1Q2P1/P1B2PK1/8 w - - 5 30\nside_to_move: white\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, h8h1, d3a6, d3f5, d3b5, d3e4, d3d4, d3c4, d3f3, d3e3, d3c3, d3e2, d3d2, d3f1, d3d1, a3f8, a3e7, a3d6, a3c5, a3b4, a3b2, a3c1, g2h2, g2h1, g2g1, g2f1, c2d1, c2b1, b3b4, f2f3, f2f4\nmove: d3b5\npuzzle_id: FZqMM\nrating: 2222\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 6k1/1p1P1p2/4p1p1/P1Rp3p/1P3P2/2Q3KP/6P1/3q2b1 b - - 2 34\nside_to_move: black\nlegal_moves_uci: g8f8, g8h7, g1c5, g1d4, g1e3, g1h2, g1f2, d1g4, d1d4, d1a4, d1f3, d1d3, d1b3, d1e2, d1d2, d1c2, d1f1, d1e1, d1c1, d1b1, d1a1, f7f6, b7b6, g6g5, e6e5, h5h4, d5d4, f7f5, b7b5\nmove: h5h4\npuzzle_id: tyHzQ\nrating: 2434\nthemes: ['attraction', 'endgame', 'fork', 'mate', 'mateIn5', 'veryLong']\nposition_index: 1\n\nposition_fen: 1r3r1k/5ppB/p7/6P1/1p1p1q1Q/6N1/PPP5/1K1b4 w - - 0 31\nside_to_move: white\nlegal_moves_uci: h7g8, h7g6, h7f5, h7e4, h7d3, h4h6, h4h5, h4g4, h4f4, h4h3, h4h2, h4h1, g3h5, g3f5, g3e4, g3e2, g3h1, g3f1, b1a1, g5g6, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: h4f4\npuzzle_id: 4dQTV\nrating: 2685\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: 3k4/7r/1b4B1/8/4pnP1/8/5R2/2R3K1 b - - 15 57\nside_to_move: black\nlegal_moves_uci: d8e7, d8d7, h7h8, h7g7, h7f7, h7e7, h7d7, h7c7, h7b7, h7a7, h7h6, h7h5, h7h4, h7h3, h7h2, h7h1, b6c7, b6a7, b6c5, b6a5, b6d4, b6e3, b6f2, f4g6, f4e6, f4h5, f4d5, f4h3, f4d3, f4g2, f4e2, e4e3\nmove: f4g6\npuzzle_id: 4WNM9\nrating: 2668\nthemes: ['crushing', 'endgame', 'exposedKing', 'master', 'pin', 'veryLong']\nposition_index: 1\n\nposition_fen: 5rk1/p4p2/3Q2p1/5q1p/6P1/5P1K/7P/4R2R b - - 0 35\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8g7, f8e8, f8d8, f8c8, f8b8, f8a8, f5c8, f5d7, f5f6, f5e6, f5g5, f5e5, f5d5, f5c5, f5b5, f5a5, f5g4, f5f4, f5e4, f5f3, f5d3, f5c2, f5b1, h5g4, f7f6, a7a6, g6g5, h5h4, a7a5\nmove: f5f3\npuzzle_id: 6ziXy\nrating: 2213\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: r7/5k2/pp1p1ppp/2pP4/2P2q2/2PB3Q/P1K5/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h3c8, h3d7, h3h6, h3e6, h3h5, h3f5, h3h4, h3g4, h3g3, h3f3, h3e3, h3h2, h3g2, h3h1, h3f1, d3g6, d3f5, d3e4, d3e2, d3f1, c2b3, c2b2, c2d1, c2b1, a2a3, a2a4\nmove: h3d7\npuzzle_id: 5nfOl\nrating: 2156\nthemes: ['attraction', 'crushing', 'deflection', 'endgame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 4r1k1/rp3ppp/p7/P2N4/3P1q2/QP1np2P/2R2PP1/1N3K1R b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, a7a8, f4b8, f4c7, f4h6, f4f6, f4d6, f4g5, f4f5, f4e5, f4h4, f4g4, f4e4, f4d4, f4g3, f4f3, f4h2, f4f2, d3e5, d3c5, d3b4, d3f2, d3b2, d3e1, d3c1, e3f2, h7h6, g7g6, f7f6, b7b6, e3e2, h7h5, g7g5, f7f5, b7b5\nmove: e3e2\npuzzle_id: 3Mg46\nrating: 2418\nthemes: ['advancedPawn', 'long', 'master', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 0\n\nposition_fen: 5rk1/3Q4/2p5/3p4/6p1/1P2r2q/P6p/2RK2R1 w - - 0 36\nside_to_move: white\nlegal_moves_uci: d7e8, d7d8, d7c8, d7h7, d7g7, d7f7, d7e7, d7c7, d7b7, d7a7, d7e6, d7d6, d7c6, d7f5, d7d5, d7g4, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, d1d2, d1c2, c1c6, c1c5, c1c4, c1c3, c1c2, c1b1, c1a1, b3b4, a2a3, a2a4\nmove: g1g4\npuzzle_id: CNFx5\nrating: 1127\nthemes: ['crushing', 'endgame', 'short']\nposition_index: 0\n\nposition_fen: r4r2/5p1k/p2p4/q3nN2/1p4Q1/8/PPP5/2K2nN1 w - - 2 29\nside_to_move: white\nlegal_moves_uci: f5g7, f5e7, f5h6, f5d6, f5h4, f5d4, f5g3, f5e3, g4g8, g4g7, g4g6, g4h5, g4g5, g4h4, g4f4, g4e4, g4d4, g4c4, g4b4, g4h3, g4g3, g4f3, g4g2, g4e2, g4d1, g1h3, g1f3, g1e2, c1d1, c1b1, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: g4g7\npuzzle_id: GJCXh\nrating: 2676\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'veryLong']\nposition_index: 4\n\nposition_fen: r2r2kb/pp2pp1p/2q2npB/4p3/8/2N5/PPPQ1PPP/3R1RK1 w - - 0 15\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, h6g5, h6f4, h6e3, c3d5, c3b5, c3e4, c3a4, c3e2, c3b1, d2d8, d2d7, d2d6, d2g5, d2d5, d2f4, d2d4, d2e3, d2d3, d2e2, d2e1, d2c1, g1h1, f1e1, d1e1, d1c1, d1b1, d1a1, h2h3, g2g3, f2f3, b2b3, a2a3, h2h4, g2g4, f2f4, b2b4, a2a4\nmove: d2d8\npuzzle_id: XLka2\nrating: 640\nthemes: ['crushing', 'kingsideAttack', 'middlegame', 'short']\nposition_index: 0","sha256":"06891d801c67580a0349bb8af2c94f48743e96a98b163c69d16aa61e91056570","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/bfs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 6k1/pp6/2p5/3p3p/3P2p1/P3P1PP/1P3K2/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: f2g2, f2e2, f2g1, f2f1, f2e1, h3g4, h3h4, e3e4, a3a4, b2b3, b2b4\nmove: h3g4\n\nposition_fen: 8/3r1pkp/P5p1/2b1R3/2P1P3/8/2R3PP/7K b - - 1 43\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, g7f6, d7d8, d7e7, d7c7, d7b7, d7a7, d7d6, d7d5, d7d4, d7d3, d7d2, d7d1, c5f8, c5e7, c5a7, c5d6, c5b6, c5d4, c5b4, c5e3, c5a3, c5f2, c5g1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: d7d1\n\nposition_fen: 7r/1p1kn3/8/1N1P1p2/8/4Ppp1/PP1RK1Pr/4N3 w - - 0 31\nside_to_move: white\nlegal_moves_uci: e2f3, e2d3, e2f1, e2d1, e1f3\nmove: e2f3\n\nposition_fen: 8/8/8/5p1p/8/6P1/4K1kP/8 b - - 1 50\nside_to_move: black\nlegal_moves_uci: g2h3, g2h2, g2h1, g2g1, h5h4, f5f4\nmove: h5h4\n\nposition_fen: 3r4/5k2/8/1p2PKp1/pP1N2P1/6p1/1P4P1/8 w - - 4 33\nside_to_move: white\nlegal_moves_uci: f5g5, f5e4, d4e6, d4c6, d4b5, d4f3, d4b3, d4e2, d4c2, e5e6, b2b3\nmove: e5e6\npuzzle_id: 5eBes\nrating: 2381\nthemes: ['crushing', 'endgame', 'veryLong', 'zugzwang']\nposition_index: 0\n\nposition_fen: 5rkr/pp2q1p1/4n1Q1/3nPR1p/4N3/8/PP4PP/5R1K w - - 8 24\nside_to_move: white\nlegal_moves_uci: g6e8, g6h7, g6g7, g6f7, g6h6, g6f6, g6e6, g6h5, g6g5, g6g4, g6g3, f5f8, f5f7, f5f6, f5h5, f5g5, f5f4, f5f3, f5f2, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h1g1, f1f4, f1f3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: g6e6\npuzzle_id: 4uOji\nrating: 2195\nthemes: ['crushing', 'deflection', 'fork', 'master', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: Rn4k1/6pp/3p4/1B1Pq3/1PN1n3/7P/2P2RK1/3Q4 b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e5e8, e5e7, e5f6, e5e6, e5h5, e5g5, e5f5, e5d5, e5f4, e5d4, e5g3, e5c3, e5h2, e5b2, e5a1, e4f6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h7h6, g7g6, h7h5, g7g5\nmove: e5g3\npuzzle_id: u5Z6U\nrating: 2563\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: 8/6nk/p3p2p/1b1pNp1N/1b1P1P1P/4q3/6PK/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h5g7, h5f6, h5g3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, h2h1, g2g3, g2g4\nmove: h5f6\npuzzle_id: saT5n\nrating: 2740\nthemes: ['long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 7r/5pk1/3p1P2/1p4q1/3p4/PQ1B4/1P3p2/5K1R b - - 0 46\nside_to_move: black\nlegal_moves_uci: g7g8, g7f8, g7f6, g5f6\nmove: g7f6\npuzzle_id: xAiWS\nrating: 2314\nthemes: ['advantage', 'endgame', 'exposedKing', 'long', 'skewer']\nposition_index: 0\n\nposition_fen: 7k/p5pp/3p4/2p1p3/2P3q1/1PQ2rP1/P4n1P/2B1KR2 w - - 0 28\nside_to_move: white\nlegal_moves_uci: c3e5, c3a5, c3d4, c3b4, c3f3, c3e3, c3d3, c3d2, c3c2, c3b2, c3a1, f1f2, f1h1, f1g1, e1e2, e1d2, c1h6, c1g5, c1f4, c1e3, c1a3, c1d2, c1b2, b3b4, h2h3, a2a3, h2h4, a2a4\nmove: f1f2\npuzzle_id: KXgrS\nrating: 2165\nthemes: ['advantage', 'long', 'middlegame']\nposition_index: 2\n\nposition_fen: 6n1/1p4Pk/2p1N2P/p5K1/8/8/8/8 w - - 1 53\nside_to_move: white\nlegal_moves_uci: e6f8, e6d8, e6c7, e6c5, e6f4, e6d4, g5h5, g5f5, g5h4, g5g4, g5f4\nmove: e6f8\npuzzle_id: mZF9a\nrating: 513\nthemes: ['endgame', 'knightEndgame', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0\n\nposition_fen: 4rr2/p7/1p3k1p/2p1Rp2/6p1/P7/1P3PPP/4RK2 w - - 5 26\nside_to_move: white\nlegal_moves_uci: e5e8, e5e7, e5e6, e5f5, e5d5, e5c5, e5e4, e5e3, e5e2, f1e2, f1g1, e1e4, e1e3, e1e2, e1d1, e1c1, e1b1, e1a1, a3a4, h2h3, g2g3, f2f3, b2b3, h2h4, f2f4, b2b4\nmove: e5e8\npuzzle_id: vOxk6\nrating: 939\nthemes: ['crushing', 'endgame', 'rookEndgame', 'short']\nposition_index: 0\n\nposition_fen: 1r5k/p5p1/6Pp/Q6P/8/8/P4P2/KR1r4 b - - 2 40\nside_to_move: black\nlegal_moves_uci: h8g8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1h1, d1g1, d1f1, d1e1, d1c1, d1b1, a7a6\nmove: d1b1\npuzzle_id: TMIoF\nrating: 1117\nthemes: ['endgame', 'mate', 'mateIn2', 'queenRookEndgame', 'short']\nposition_index: 1\n\nposition_fen: 1R6/4k3/7r/2p3K1/4p3/8/8/8 w - - 0 53\nside_to_move: white\nlegal_moves_uci: b8h8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, g5h6, g5f5, g5g4, g5f4\nmove: g5h6\npuzzle_id: 0ErLd\nrating: 2296\nthemes: ['crushing', 'endgame', 'exposedKing', 'rookEndgame', 'veryLong']\nposition_index: 3\n\nposition_fen: Q2qkb1r/p2bpppp/8/1B1P4/4nB2/4PK2/PP1p1PPP/n5NR w k - 1 16\nside_to_move: white\nlegal_moves_uci: a8d8, a8c8, a8b8, a8b7, a8a7, a8c6, b5d7, b5c6, b5a6, b5c4, b5a4, b5d3, b5e2, b5f1, f4b8, f4c7, f4h6, f4d6, f4g5, f4e5, f4g3, f3e4, f3e2, g1h3, g1e2, d5d6, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: b5d7\npuzzle_id: lQxX8\nrating: 2532\nthemes: ['attraction', 'clearance', 'fork', 'mate', 'mateIn5', 'middlegame', 'pin', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: 1k6/1P6/1K6/6B1/6P1/8/8/4q3 w - - 0 56\nside_to_move: white\nlegal_moves_uci: b6c6, b6a6, b6c5, b6b5, g5d8, g5e7, g5h6, g5f6, g5h4, g5f4, g5e3, g5d2, g5c1\nmove: g5f4\npuzzle_id: Nx8za\nrating: 836\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 0","sha256":"1d6d27238c4c24213636716f491c28675062edc0e1e3ab7fab089d1b098f07c7","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/bfs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 6k1/5pp1/p3p2p/8/4n3/1BP5/PP2KPP1/4R2q w - - 0 35\nside_to_move: white\nlegal_moves_uci: b3e6, b3d5, b3c4, b3a4, b3c2, b3d1, e2f3, e2e3, e2d3, e2d1, e1h1, e1g1, e1f1, e1d1, e1c1, e1b1, e1a1, c3c4, g2g3, f2f3, a2a3, g2g4, f2f4, a2a4\nmove: e1h1\n\nposition_fen: 2k4r/ppp2p2/3bpq2/8/3P4/2P2Q2/PP3P1p/4RR1K b - - 0 24\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, h8h4, h8h3, c8d8, c8b8, c8d7, f6d8, f6g7, f6e7, f6h6, f6g6, f6g5, f6f5, f6e5, f6h4, f6f4, f6d4, f6f3, d6f8, d6e7, d6e5, d6c5, d6f4, d6b4, d6g3, d6a3, c7c6, b7b6, a7a6, e6e5, c7c5, b7b5, a7a5\nmove: f6f3\n\nposition_fen: 3r4/1p1q2k1/p3n1p1/4Pp1Q/3p4/P6P/1P1r4/6RK w - - 0 47\nside_to_move: white\nlegal_moves_uci: h5h8, h5h7, h5h6, h5g6, h5g5, h5f5, h5h4, h5g4, h5f3, h5e2, h5d1, g1g6, g1g5, g1g4, g1g3, g1g2, g1f1, g1e1, g1d1, g1c1, g1b1, g1a1, h3h4, a3a4, b2b3, b2b4\nmove: g1g6\n\nposition_fen: 3r1k2/1p1q4/p3n1R1/4Pp1Q/3p4/P6P/1P1r4/7K w - - 1 48\nside_to_move: white\nlegal_moves_uci: g6g8, g6g7, g6h6, g6f6, g6e6, g6g5, g6g4, g6g3, g6g2, g6g1, h5h8, h5h7, h5h6, h5g5, h5f5, h5h4, h5g4, h5f3, h5e2, h5d1, h1g1, h3h4, a3a4, b2b3, b2b4\nmove: h5h8\n\nposition_fen: r3r1k1/1p1qbppp/p1n5/2pp1N2/6N1/2PP3P/PP3PP1/R2QR1K1 b - - 6 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, a8d8, a8c8, a8b8, a8a7, e7f8, e7d8, e7f6, e7d6, e7g5, e7h4, d7d8, d7c8, d7c7, d7e6, d7d6, d7f5, c6d8, c6b8, c6a7, c6e5, c6a5, c6d4, c6b4, h7h6, g7g6, f7f6, b7b6, a6a5, d5d4, c5c4, h7h5, g7g5, b7b5\nmove: d7f5\npuzzle_id: DmJlo\nrating: 792\nthemes: ['advantage', 'hangingPiece', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: 3r1rk1/4R2p/p4bp1/1p3p2/4QPP1/8/P4q1P/3R3K w - - 0 29\nside_to_move: white\nlegal_moves_uci: e7e8, e7h7, e7g7, e7f7, e7d7, e7c7, e7b7, e7a7, e7e6, e7e5, e4a8, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4d4, e4c4, e4b4, e4a4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, e4b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, g4f5, g4g5, h2h3, a2a3, h2h4, a2a4\nmove: e4e6\npuzzle_id: 0PhbW\nrating: 2606\nthemes: ['deflection', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 7k/3n2p1/4Q2p/3p2N1/8/3q4/1P3KPP/r3B3 w - - 0 29\nside_to_move: white\nlegal_moves_uci: e6g8, e6e8, e6f7, e6e7, e6d7, e6h6, e6g6, e6f6, e6d6, e6c6, e6b6, e6a6, e6f5, e6e5, e6d5, e6g4, e6e4, e6h3, e6e3, e6e2, g5h7, g5f7, g5e4, g5h3, g5f3, f2g1, e1a5, e1b4, e1c3, e1d2, h2h3, g2g3, b2b3, h2h4, g2g4, b2b4\nmove: e6e8\npuzzle_id: vyvus\nrating: 1408\nthemes: ['endgame', 'fork', 'mate', 'mateIn2', 'short']\nposition_index: 0\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb2k/2p4P/8/2P2Q2/PP1P1PP1/RNB1K2R w KQ - 1 13\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1h4, h1h3, h1h2, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, g2g3, d2d3, b2b3, a2a3, g2g4, d2d4, b2b4, a2a4\nmove: f3e3\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 2\n\nposition_fen: 4k3/2p3R1/2p1PK2/5r2/p2P4/r7/8/B7 w - - 0 47\nside_to_move: white\nlegal_moves_uci: f6g6, f6f5\nmove: f6f5\npuzzle_id: 52eVA\nrating: 2338\nthemes: ['crushing', 'defensiveMove', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: 1r4RQ/p5r1/2n1pk1p/5p1q/2PP4/5P2/P4P1P/R6K w - - 6 31\nside_to_move: white\nlegal_moves_uci: h8h7, h8g7, h8h6, g8f8, g8e8, g8d8, g8c8, g8b8, g8g7, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, d4d5, c4c5, f3f4, h2h3, a2a3, h2h4, a2a4\nmove: h8g7\npuzzle_id: C9c6a\nrating: 2054\nthemes: ['discoveredAttack', 'discoveredCheck', 'exposedKing', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: rn3rk1/4b2p/6pB/pp1p2N1/8/P5nP/1P3PP1/R3R1K1 w - - 0 29\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, g5h7, g5f7, g5e6, g5e4, g5f3, g1h2, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, a1a2, a1d1, a1c1, a1b1, f2g3, h3h4, a3a4, f2f3, b2b3, f2f4, b2b4\nmove: e1e7\npuzzle_id: mPgSs\nrating: 2619\nthemes: ['crushing', 'discoveredAttack', 'discoveredCheck', 'kingsideAttack', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: r4rk1/ppp2pq1/3p2p1/3Np1n1/3nP1pQ/8/PPP2P2/1K3B1R w - - 4 19\nside_to_move: white\nlegal_moves_uci: d5e7, d5c7, d5f6, d5b6, d5f4, d5b4, d5e3, d5c3, h4h8, h4h7, h4h6, h4h5, h4g5, h4g4, h4h3, h4g3, h4h2, h1h3, h1h2, h1g1, f1a6, f1b5, f1c4, f1h3, f1d3, f1g2, f1e2, b1c1, b1a1, f2f3, c2c3, b2b3, a2a3, f2f4, c2c4, b2b4, a2a4\nmove: d5e7\npuzzle_id: m17EB\nrating: 1277\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 8/5pkp/2BR2p1/1pP1p3/1P5q/3QP2P/5P1K/r7 b - - 0 32\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, h4d8, h4e7, h4h6, h4f6, h4h5, h4g5, h4g4, h4f4, h4e4, h4d4, h4c4, h4b4, h4h3, h4g3, h4f2, a1a8, a1a7, a1a6, a1a5, a1a4, a1a3, a1a2, a1h1, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, h7h6, f7f6, g6g5, e5e4, h7h5, f7f5\nmove: h4f2\npuzzle_id: HNck2\nrating: 2516\nthemes: ['advantage', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb3/2p3k1/8/2P2Q2/PP1P1PPP/RNB1K2R w KQ - 0 11\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3h5, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, h2h3, g2g3, d2d3, b2b3, a2a3, h2h4, g2g4, d2d4, b2b4, a2a4\nmove: h2h4\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 0\n\nposition_fen: r5k1/3n1pbp/6p1/8/3Bq3/1P5P/P1RQ2P1/1K5R b - - 3 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, a8a6, a8a5, a8a4, a8a3, a8a2, g7h8, g7f8, g7h6, g7f6, g7e5, g7d4, d7f8, d7b8, d7f6, d7b6, d7e5, d7c5, e4e8, e4e7, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4h4, e4g4, e4f4, e4d4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: g7d4\npuzzle_id: uHEok\nrating: 1301\nthemes: ['crushing', 'discoveredAttack', 'middlegame', 'short']\nposition_index: 1","sha256":"43ba7f9d32a6eac10fbbcb11331d5659827f90ba03f1f7fd1ff368411a7725d2","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/brs/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: r6r/pppk3p/3pN1p1/3P1bBq/1b1P4/8/P4PPP/2R2RK1 w - - 0 21\nside_to_move: white\nlegal_moves_uci: e6f8, e6d8, e6g7, e6c7, e6c5, e6f4, g5d8, g5e7, g5h6, g5f6, g5h4, g5f4, g5e3, g5d2, g1h1, f1e1, f1d1, c1c7, c1c6, c1c5, c1c4, c1c3, c1c2, c1e1, c1d1, c1b1, c1a1, h2h3, g2g3, f2f3, a2a3, h2h4, g2g4, f2f4, a2a4\nmove: c1c7\n\nposition_fen: 1k1B3r/5p2/1p4P1/1N6/Pp1pB1qp/8/5K2/R2Q1R2 b - - 0 30\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, b8c8, g4c8, g4d7, g4g6, g4e6, g4h5, g4g5, g4f5, g4f4, g4e4, g4h3, g4g3, g4f3, g4g2, g4e2, g4g1, g4d1, f7g6, f7f6, h4h3, d4d3, b4b3, f7f5\nmove: g4g3\n\nposition_fen: 6k1/p5p1/2p3Qp/8/3B2PK/2P2r2/PP2r2R/R7 b - - 1 34\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, f3f8, f3f7, f3f6, f3f5, f3f4, f3h3, f3g3, f3e3, f3d3, f3c3, f3f2, f3f1, e2e8, e2e7, e2e6, e2e5, e2e4, e2e3, e2h2, e2g2, e2f2, e2d2, e2c2, e2b2, e2e1, a7a6, h6h5, c6c5, a7a5\nmove: e2h2\npuzzle_id: XGwZ5\nrating: 2639\nthemes: ['deflection', 'discoveredAttack', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 2\n\nposition_fen: r3r2k/2q3p1/pp3NQp/1n3p2/1P6/3P2RP/4nPP1/3R2K1 w - - 4 33\nside_to_move: white\nlegal_moves_uci: g1h2, g1h1, g1f1\nmove: g1h2\npuzzle_id: EWmia\nrating: 2438\nthemes: ['advantage', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 4k3/2p3R1/2p1PK2/5r2/p2P4/r7/8/B7 w - - 0 47\nside_to_move: white\nlegal_moves_uci: f6g6, f6f5\nmove: f6f5\npuzzle_id: 52eVA\nrating: 2338\nthemes: ['crushing', 'defensiveMove', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: R3r1k1/8/1p4K1/1Pp2P2/3n4/8/8/8 w - - 2 61\nside_to_move: white\nlegal_moves_uci: a8e8, a8d8, a8c8, a8b8, a8a7, a8a6, a8a5, a8a4, a8a3, a8a2, a8a1, g6h6, g6f6, g6h5, g6g5, f5f6\nmove: a8e8\npuzzle_id: aEO4c\nrating: 1401\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 1\n\nposition_fen: rn2r1k1/p1b2ppp/2p2n2/2Np4/1P6/P2P1B1P/3B1PPq/R2QRK2 b - - 2 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, b8d7, b8a6, c7d8, c7d6, c7b6, c7e5, c7a5, c7f4, c7g3, f6d7, f6h5, f6g4, f6e4, h2d6, h2e5, h2f4, h2h3, h2g3, h2g2, h2h1, h2g1, h7h6, g7g6, a7a6, d5d4, h7h5, g7g5, a7a5\nmove: h2h1\npuzzle_id: 6zFvF\nrating: 984\nthemes: ['kingsideAttack', 'mate', 'mateIn2', 'opening', 'short']\nposition_index: 1\n\nposition_fen: r4r2/pppnbk2/8/3pp1B1/4P2Q/5q2/PPP2P2/RN2K3 w Q - 0 22\nside_to_move: white\nlegal_moves_uci: g5e7, g5h6, g5f6, g5f4, g5e3, g5d2, g5c1, h4h8, h4h7, h4h6, h4h5, h4g4, h4f4, h4h3, h4g3, h4h2, h4h1, e1d2, e1f1, b1c3, b1a3, b1d2, e4d5, c2c3, b2b3, a2a3, c2c4, b2b4, a2a4\nmove: h4h7\npuzzle_id: uDWXg\nrating: 2341\nthemes: ['exposedKing', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 8/3k4/K4p2/1P2p1p1/p1n1P1P1/6P1/5B2/8 b - - 2 64\nside_to_move: black\nlegal_moves_uci: d7e8, d7d8, d7c8, d7e7, d7c7, d7e6, d7d6, c4d6, c4b6, c4a5, c4e3, c4a3, c4d2, c4b2, f6f5, a4a3\nmove: a4a3\npuzzle_id: g5x57\nrating: 2555\nthemes: ['crushing', 'endgame', 'long']\nposition_index: 2\n\nposition_fen: 2r4k/pp1b4/3R1p1p/8/3NP3/1Q3P2/PP3nqP/1KR5 b - - 3 27\nside_to_move: black\nlegal_moves_uci: h8h7, h8g7, c8g8, c8f8, c8e8, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, c8c4, c8c3, c8c2, c8c1, d7e8, d7e6, d7c6, d7f5, d7b5, d7g4, d7a4, d7h3, g2g8, g2g7, g2g6, g2g5, g2g4, g2h3, g2g3, g2f3, g2h2, g2h1, g2g1, g2f1, f2g4, f2e4, f2h3, f2d3, f2h1, f2d1, b7b6, a7a6, h6h5, f6f5, b7b5, a7a5\nmove: c8c1\npuzzle_id: uyEMf\nrating: 2599\nthemes: ['advantage', 'attraction', 'fork', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: k1r5/pp2Q3/r7/3p4/P2PpNP1/KP2P3/2q2P2/3R3R b - - 3 40\nside_to_move: black\nlegal_moves_uci: c8h8, c8g8, c8f8, c8e8, c8d8, c8b8, c8c7, c8c6, c8c5, c8c4, c8c3, a8b8, a6h6, a6g6, a6f6, a6e6, a6d6, a6c6, a6b6, a6a5, a6a4, c2c7, c2c6, c2c5, c2c4, c2d3, c2c3, c2b3, c2f2, c2e2, c2d2, c2b2, c2a2, c2d1, c2c1, c2b1, b7b6, b7b5\nmove: b7b5\npuzzle_id: wonMd\nrating: 2200\nthemes: ['advantage', 'exposedKing', 'middlegame', 'pin', 'veryLong']\nposition_index: 2\n\nposition_fen: 2k3r1/ppp1p3/7p/8/4PB2/5N2/PK4RP/8 b - - 0 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8e8, g8d8, g8g7, g8g6, g8g5, g8g4, g8g3, g8g2, c8d8, c8b8, c8d7, e7e6, c7c6, b7b6, a7a6, h6h5, e7e5, c7c5, b7b5, a7a5\nmove: g8g2\npuzzle_id: JUEhk\nrating: 513\nthemes: ['advantage', 'endgame', 'hangingPiece', 'oneMove']\nposition_index: 0\n\nposition_fen: 2Q5/3n1ppp/4k3/8/1P6/7P/6PK/4q3 w - - 0 42\nside_to_move: white\nlegal_moves_uci: c8h8, c8g8, c8f8, c8e8, c8d8, c8b8, c8a8, c8d7, c8c7, c8b7, c8c6, c8a6, c8c5, c8c4, c8c3, c8c2, c8c1, b4b5, h3h4, g2g3, g2g4\nmove: c8e8\npuzzle_id: uVlY9\nrating: 2723\nthemes: ['crushing', 'endgame', 'skewer', 'veryLong']\nposition_index: 3\n\nposition_fen: Qn1qk2r/p1p3pp/4pn2/4p3/1b6/2N5/PPp1NPPP/R1B1K2R b KQk - 2 11\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, e8f8, e8f7, e8e7, e8d7, d8c8, d8e7, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, b8d7, b8c6, b8a6, f6g8, f6d7, f6h5, f6d5, f6g4, f6e4, b4f8, b4e7, b4d6, b4c5, b4a5, b4c3, b4a3, e8g8, h7h6, g7g6, c7c6, a7a6, e5e4, h7h5, g7g5, c7c5, a7a5\nmove: d8d1\npuzzle_id: fxUFR\nrating: 1802\nthemes: ['mate', 'mateIn1', 'oneMove', 'opening', 'pin']\nposition_index: 0\n\nposition_fen: 1k2r1r1/1p5p/pP3b2/6p1/3pp3/7P/2Q2PP1/4R1K1 w - - 2 30\nside_to_move: white\nlegal_moves_uci: c2c8, c2c7, c2c6, c2c5, c2e4, c2c4, c2a4, c2d3, c2c3, c2b3, c2e2, c2d2, c2b2, c2a2, c2d1, c2c1, c2b1, g1h2, g1h1, g1f1, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, e1a1, h3h4, g2g3, f2f3, g2g4, f2f4\nmove: c2c7\npuzzle_id: DIC2c\nrating: 2083\nthemes: ['advancedPawn', 'discoveredCheck', 'doubleCheck', 'endgame', 'mate', 'mateIn5', 'promotion', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: r6r/1pp2kp1/p4Pp1/3P4/3Q4/2N2R2/PPP4q/4RK2 b - - 1 23\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8h7, h8h6, h8h5, h8h4, h8h3, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, f7g8, f7f8, h2h7, h2h6, h2d6, h2h5, h2e5, h2h4, h2f4, h2h3, h2g3, h2g2, h2f2, h2e2, h2d2, h2c2, h2h1, h2g1, g7f6, c7c6, b7b6, g6g5, a6a5, c7c5, b7b5\nmove: h2h1\npuzzle_id: dJaOf\nrating: 2294\nthemes: ['advantage', 'deflection', 'discoveredAttack', 'fork', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 2","sha256":"0babf035405209aabedbf4ac79b7983a612fcc082408cc4585840d4ccfa5875a","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/brs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 2r2rk1/p3qppb/4p2p/3p3P/3N2Q1/1P6/PB4P1/2n2RK1 w - - 0 25\nside_to_move: white\nlegal_moves_uci: g4g7, g4g6, g4e6, g4g5, g4f5, g4h4, g4f4, g4e4, g4h3, g4g3, g4f3, g4e2, g4d1, d4e6, d4c6, d4f5, d4b5, d4f3, d4e2, d4c2, b2c3, b2a3, b2c1, b2a1, g1h2, g1f2, g1h1, f1f7, f1f6, f1f5, f1f4, f1f3, f1f2, f1e1, f1d1, f1c1, b3b4, g2g3, a2a3, a2a4\nmove: g4g7\n\nposition_fen: 5rk1/6p1/6Qp/3pN3/P7/2PB2q1/6b1/3RR1K1 b - - 5 34\nside_to_move: black\nlegal_moves_uci: g8h8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, f8f1, g3g6, g3g5, g3e5, g3h4, g3g4, g3f4, g3h3, g3f3, g3e3, g3d3, g3h2, g3f2, g3e1, g2e4, g2h3, g2f3, g2h1, g2f1, h6h5, d5d4\nmove: g3f2\n\nposition_fen: r3k2r/ppp2pp1/2b5/3p4/3NPn2/1P2P1Qp/PBP3P1/RN3R1K b kq - 0 19\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8h7, h8h6, h8h5, h8h4, e8f8, e8d8, e8e7, e8d7, a8d8, a8c8, a8b8, c6d7, c6b5, c6a4, f4g6, f4e6, f4h5, f4d3, f4g2, f4e2, e8g8, e8c8, d5e4, h3g2, g7g6, f7f6, b7b6, a7a6, h3h2, g7g5, f7f5, b7b5, a7a5\nmove: h3g2\n\nposition_fen: 4r2k/1p1P2pp/1pn5/6q1/1P5n/P5p1/1B3P1P/3R2K1 w - - 0 34\nside_to_move: white\nlegal_moves_uci: b2g7, b2f6, b2e5, b2d4, b2c3, b2c1, b2a1, g1h1, g1f1, d1d6, d1d5, d1d4, d1d3, d1d2, d1f1, d1e1, d1c1, d1b1, d1a1, d7e8q, d7e8r, d7e8b, d7e8n, h2g3, f2g3, d7d8q, d7d8r, d7d8b, d7d8n, b4b5, a3a4, h2h3, f2f3, f2f4\nmove: d7e8q\n\nposition_fen: 5rk1/8/p2QP2p/1p4p1/1Pp4P/2P1q1P1/P5K1/3R4 b - - 6 42\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8g7, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, f8f1, e3a7, e3e6, e3b6, e3e5, e3c5, e3f4, e3e4, e3d4, e3g3, e3f3, e3d3, e3c3, e3f2, e3e2, e3d2, e3g1, e3e1, e3c1, g5h4, h6h5, a6a5, g5g4\nmove: f8f2\npuzzle_id: dx4XK\nrating: 2608\nthemes: ['attraction', 'endgame', 'mate', 'mateIn4', 'veryLong']\nposition_index: 0\n\nposition_fen: r4rk1/pp2q1p1/3b3P/4n3/8/PP5Q/1BPN1P2/R4K1R b - - 0 23\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8f7, f8e8, f8d8, f8c8, f8b8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, a8e8, a8d8, a8c8, a8b8, e7e8, e7d8, e7f7, e7d7, e7c7, e7f6, e7e6, e7g5, e7h4, d6b8, d6c7, d6c5, d6b4, d6a3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, g7h6, g7g6, b7b6, a7a6, g7g5, b7b5, a7a5\nmove: f8f2\npuzzle_id: y7SzX\nrating: 2278\nthemes: ['advantage', 'attraction', 'discoveredAttack', 'discoveredCheck', 'fork', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: 6k1/7p/p1p2p2/2P5/1PN2R2/P6b/2rp1P1P/5RK1 b - - 1 29\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8g7, g8f7, h3c8, h3d7, h3e6, h3f5, h3g4, h3g2, h3f1, c2c4, c2c3, c2b2, c2a2, c2c1, h7h6, f6f5, a6a5, d2d1q, d2d1r, d2d1b, d2d1n, h7h5\nmove: h3f1\npuzzle_id: aMijX\nrating: 2007\nthemes: ['advantage', 'discoveredAttack', 'discoveredCheck', 'middlegame', 'quietMove', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: 5rk1/p5p1/2p3Qp/8/3B2P1/2P2P1K/PP2r2R/R7 b - - 0 33\nside_to_move: black\nlegal_moves_uci: g8h8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, e2e8, e2e7, e2e6, e2e5, e2e4, e2e3, e2h2, e2g2, e2f2, e2d2, e2c2, e2b2, e2e1, a7a6, h6h5, c6c5, a7a5\nmove: f8f3\npuzzle_id: XGwZ5\nrating: 2639\nthemes: ['deflection', 'discoveredAttack', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 1rb2rk1/6pp/p1q1N3/1p3p2/5b2/2BQ4/PPP2PPP/R3R1K1 b - - 0 21\nside_to_move: black\nlegal_moves_uci: g8h8, g8f7, f8e8, f8d8, f8f7, f8f6, c8d7, c8b7, c8e6, b8a8, b8b7, b8b6, c6e8, c6a8, c6d7, c6c7, c6b7, c6e6, c6d6, c6b6, c6d5, c6c5, c6e4, c6c4, c6f3, c6c3, c6g2, f4c7, f4h6, f4d6, f4g5, f4e5, f4g3, f4e3, f4h2, f4d2, f4c1, h7h6, g7g6, a6a5, b5b4, h7h5, g7g5\nmove: c8e6\npuzzle_id: x9ufo\nrating: 1059\nthemes: ['advantage', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: r1bq1r2/pp1n1pp1/2p3k1/8/3R1QP1/8/PPP5/2K5 w - - 4 28\nside_to_move: white\nlegal_moves_uci: f4b8, f4f7, f4c7, f4h6, f4f6, f4d6, f4g5, f4f5, f4e5, f4e4, f4g3, f4f3, f4e3, f4h2, f4f2, f4d2, f4f1, d4d7, d4d6, d4d5, d4e4, d4c4, d4b4, d4a4, d4d3, d4d2, d4d1, c1d2, c1d1, c1b1, g4g5, c2c3, b2b3, a2a3, c2c4, b2b4, a2a4\nmove: f4f5\npuzzle_id: Exzx9\nrating: 2701\nthemes: ['mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 8/pp6/3P4/2K1k1p1/1p4Pp/7P/P7/8 b - - 0 40\nside_to_move: black\nlegal_moves_uci: e5f6, e5e6, e5f4, e5e4, b7b6, a7a6, b4b3, b7b5, a7a5\nmove: e5e6\npuzzle_id: E4Dcg\nrating: 2420\nthemes: ['attraction', 'crushing', 'endgame', 'pawnEndgame', 'quietMove', 'veryLong']\nposition_index: 4\n\nposition_fen: r4b1r/p5p1/R1n5/4p2p/1k2NB2/8/2P2P2/q4BK1 w - - 2 25\nside_to_move: white\nlegal_moves_uci: a6a7, a6c6, a6b6, a6a5, a6a4, a6a3, a6a2, a6a1, f4h6, f4g5, f4e5, f4g3, f4e3, f4h2, f4d2, f4c1, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4d2, g1h2, g1g2, g1h1, f2f3, c2c3, c2c4\nmove: f4d2\npuzzle_id: QNwRO\nrating: 2683\nthemes: ['discoveredCheck', 'doubleCheck', 'fork', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: r4b1r/p5p1/k1n5/Pp2p2p/3qNB2/8/2P2P2/RR3BK1 w - - 0 22\nside_to_move: white\nlegal_moves_uci: f4h6, f4g5, f4e5, f4g3, f4e3, f4h2, f4d2, f4c1, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4d2, g1h2, g1g2, g1h1, f1b5, f1c4, f1h3, f1d3, f1g2, f1e2, b1b5, b1b4, b1b3, b1b2, b1e1, b1d1, b1c1, a1a4, a1a3, a1a2, c2c3, c2c4\nmove: b1b5\npuzzle_id: QNwRO\nrating: 2683\nthemes: ['discoveredCheck', 'doubleCheck', 'fork', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/ppQ3pk/5p2/5Nnp/5K2/1P5r/P5R1/2R5 b - - 1 39\nside_to_move: black\nlegal_moves_uci: h7h8, h7g8, h7g6, g5f7, g5e6, g5e4, g5f3, h3h4, h3g3, h3f3, h3e3, h3d3, h3c3, h3b3, h3h2, h3h1, b7b6, a7a6, h5h4, b7b5, a7a5\nmove: h3f3\npuzzle_id: lsWWy\nrating: 2789\nthemes: ['hookMate', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: 2r5/1p5p/p2R4/1k6/1P1R4/P6P/4p1PK/3Bq3 w - - 1 44\nside_to_move: white\nlegal_moves_uci: d6d8, d6d7, d6h6, d6g6, d6f6, d6e6, d6c6, d6b6, d6a6, d6d5, d4d5, d4h4, d4g4, d4f4, d4e4, d4c4, d4d3, d4d2, d1a4, d1b3, d1e2, d1c2, h3h4, a3a4, g2g3, g2g4\nmove: a3a4\npuzzle_id: xTggm\nrating: 1970\nthemes: ['endgame', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0\n\nposition_fen: r4rk1/pbpp1ppp/2p5/3n4/8/3B4/PqPB1PPP/R3QRK1 w - - 5 14\nside_to_move: white\nlegal_moves_uci: d3h7, d3g6, d3a6, d3f5, d3b5, d3e4, d3c4, d3e2, d2h6, d2g5, d2a5, d2f4, d2b4, d2e3, d2c3, d2c1, g1h1, e1e8, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1d1, e1c1, e1b1, a1d1, a1c1, a1b1, h2h3, g2g3, f2f3, c2c3, a2a3, h2h4, g2g4, f2f4, c2c4, a2a4\nmove: a1b1\npuzzle_id: Ibyle\nrating: 1695\nthemes: ['advantage', 'middlegame', 'oneMove']\nposition_index: 0","sha256":"88a447b80f4f747d1231c510b1406a9ee6dfcf8c97deaeaeb0718d90071fa9d5","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/brs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 6k1/5pp1/p3p2p/8/4n3/1BP5/PP2KPP1/4R2q w - - 0 35\nside_to_move: white\nlegal_moves_uci: b3e6, b3d5, b3c4, b3a4, b3c2, b3d1, e2f3, e2e3, e2d3, e2d1, e1h1, e1g1, e1f1, e1d1, e1c1, e1b1, e1a1, c3c4, g2g3, f2f3, a2a3, g2g4, f2f4, a2a4\nmove: e1h1\n\nposition_fen: 2k4r/ppp2p2/3bpq2/8/3P4/2P2Q2/PP3P1p/4RR1K b - - 0 24\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, h8h4, h8h3, c8d8, c8b8, c8d7, f6d8, f6g7, f6e7, f6h6, f6g6, f6g5, f6f5, f6e5, f6h4, f6f4, f6d4, f6f3, d6f8, d6e7, d6e5, d6c5, d6f4, d6b4, d6g3, d6a3, c7c6, b7b6, a7a6, e6e5, c7c5, b7b5, a7a5\nmove: f6f3\n\nposition_fen: 3r4/1p1q2k1/p3n1p1/4Pp1Q/3p4/P6P/1P1r4/6RK w - - 0 47\nside_to_move: white\nlegal_moves_uci: h5h8, h5h7, h5h6, h5g6, h5g5, h5f5, h5h4, h5g4, h5f3, h5e2, h5d1, g1g6, g1g5, g1g4, g1g3, g1g2, g1f1, g1e1, g1d1, g1c1, g1b1, g1a1, h3h4, a3a4, b2b3, b2b4\nmove: g1g6\n\nposition_fen: 3r1k2/1p1q4/p3n1R1/4Pp1Q/3p4/P6P/1P1r4/7K w - - 1 48\nside_to_move: white\nlegal_moves_uci: g6g8, g6g7, g6h6, g6f6, g6e6, g6g5, g6g4, g6g3, g6g2, g6g1, h5h8, h5h7, h5h6, h5g5, h5f5, h5h4, h5g4, h5f3, h5e2, h5d1, h1g1, h3h4, a3a4, b2b3, b2b4\nmove: h5h8\n\nposition_fen: r3r1k1/1p1qbppp/p1n5/2pp1N2/6N1/2PP3P/PP3PP1/R2QR1K1 b - - 6 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, a8d8, a8c8, a8b8, a8a7, e7f8, e7d8, e7f6, e7d6, e7g5, e7h4, d7d8, d7c8, d7c7, d7e6, d7d6, d7f5, c6d8, c6b8, c6a7, c6e5, c6a5, c6d4, c6b4, h7h6, g7g6, f7f6, b7b6, a6a5, d5d4, c5c4, h7h5, g7g5, b7b5\nmove: d7f5\npuzzle_id: DmJlo\nrating: 792\nthemes: ['advantage', 'hangingPiece', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: 3r1rk1/4R2p/p4bp1/1p3p2/4QPP1/8/P4q1P/3R3K w - - 0 29\nside_to_move: white\nlegal_moves_uci: e7e8, e7h7, e7g7, e7f7, e7d7, e7c7, e7b7, e7a7, e7e6, e7e5, e4a8, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4d4, e4c4, e4b4, e4a4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, e4b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, g4f5, g4g5, h2h3, a2a3, h2h4, a2a4\nmove: e4e6\npuzzle_id: 0PhbW\nrating: 2606\nthemes: ['deflection', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 7k/3n2p1/4Q2p/3p2N1/8/3q4/1P3KPP/r3B3 w - - 0 29\nside_to_move: white\nlegal_moves_uci: e6g8, e6e8, e6f7, e6e7, e6d7, e6h6, e6g6, e6f6, e6d6, e6c6, e6b6, e6a6, e6f5, e6e5, e6d5, e6g4, e6e4, e6h3, e6e3, e6e2, g5h7, g5f7, g5e4, g5h3, g5f3, f2g1, e1a5, e1b4, e1c3, e1d2, h2h3, g2g3, b2b3, h2h4, g2g4, b2b4\nmove: e6e8\npuzzle_id: vyvus\nrating: 1408\nthemes: ['endgame', 'fork', 'mate', 'mateIn2', 'short']\nposition_index: 0\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb2k/2p4P/8/2P2Q2/PP1P1PP1/RNB1K2R w KQ - 1 13\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1h4, h1h3, h1h2, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, g2g3, d2d3, b2b3, a2a3, g2g4, d2d4, b2b4, a2a4\nmove: f3e3\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 2\n\nposition_fen: 4k3/2p3R1/2p1PK2/5r2/p2P4/r7/8/B7 w - - 0 47\nside_to_move: white\nlegal_moves_uci: f6g6, f6f5\nmove: f6f5\npuzzle_id: 52eVA\nrating: 2338\nthemes: ['crushing', 'defensiveMove', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: 1r4RQ/p5r1/2n1pk1p/5p1q/2PP4/5P2/P4P1P/R6K w - - 6 31\nside_to_move: white\nlegal_moves_uci: h8h7, h8g7, h8h6, g8f8, g8e8, g8d8, g8c8, g8b8, g8g7, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, d4d5, c4c5, f3f4, h2h3, a2a3, h2h4, a2a4\nmove: h8g7\npuzzle_id: C9c6a\nrating: 2054\nthemes: ['discoveredAttack', 'discoveredCheck', 'exposedKing', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: rn3rk1/4b2p/6pB/pp1p2N1/8/P5nP/1P3PP1/R3R1K1 w - - 0 29\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, g5h7, g5f7, g5e6, g5e4, g5f3, g1h2, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, a1a2, a1d1, a1c1, a1b1, f2g3, h3h4, a3a4, f2f3, b2b3, f2f4, b2b4\nmove: e1e7\npuzzle_id: mPgSs\nrating: 2619\nthemes: ['crushing', 'discoveredAttack', 'discoveredCheck', 'kingsideAttack', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: r4rk1/ppp2pq1/3p2p1/3Np1n1/3nP1pQ/8/PPP2P2/1K3B1R w - - 4 19\nside_to_move: white\nlegal_moves_uci: d5e7, d5c7, d5f6, d5b6, d5f4, d5b4, d5e3, d5c3, h4h8, h4h7, h4h6, h4h5, h4g5, h4g4, h4h3, h4g3, h4h2, h1h3, h1h2, h1g1, f1a6, f1b5, f1c4, f1h3, f1d3, f1g2, f1e2, b1c1, b1a1, f2f3, c2c3, b2b3, a2a3, f2f4, c2c4, b2b4, a2a4\nmove: d5e7\npuzzle_id: m17EB\nrating: 1277\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 8/5pkp/2BR2p1/1pP1p3/1P5q/3QP2P/5P1K/r7 b - - 0 32\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, h4d8, h4e7, h4h6, h4f6, h4h5, h4g5, h4g4, h4f4, h4e4, h4d4, h4c4, h4b4, h4h3, h4g3, h4f2, a1a8, a1a7, a1a6, a1a5, a1a4, a1a3, a1a2, a1h1, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, h7h6, f7f6, g6g5, e5e4, h7h5, f7f5\nmove: h4f2\npuzzle_id: HNck2\nrating: 2516\nthemes: ['advantage', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb3/2p3k1/8/2P2Q2/PP1P1PPP/RNB1K2R w KQ - 0 11\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3h5, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, h2h3, g2g3, d2d3, b2b3, a2a3, h2h4, g2g4, d2d4, b2b4, a2a4\nmove: h2h4\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 0\n\nposition_fen: r5k1/3n1pbp/6p1/8/3Bq3/1P5P/P1RQ2P1/1K5R b - - 3 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, a8a6, a8a5, a8a4, a8a3, a8a2, g7h8, g7f8, g7h6, g7f6, g7e5, g7d4, d7f8, d7b8, d7f6, d7b6, d7e5, d7c5, e4e8, e4e7, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4h4, e4g4, e4f4, e4d4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: g7d4\npuzzle_id: uHEok\nrating: 1301\nthemes: ['crushing', 'discoveredAttack', 'middlegame', 'short']\nposition_index: 1","sha256":"43ba7f9d32a6eac10fbbcb11331d5659827f90ba03f1f7fd1ff368411a7725d2","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/copro/42":{"text":"You are an expert chess grandmaster. Analyze the given chess position carefully. Identify whose turn it is, evaluate the tactical and strategic elements of the position (such as checks, captures, threats, pins, and forks), and calculate the forced winning line. Determine the single absolute best move for the active player. Provide your reasoning briefly, followed by the best move in Standard Algebraic Notation (e.g., Nf3, Bxh7+, O-O).","sha256":"19d29e11052604f45fbee46b9b3bf7529a035a8bf4b3959dee6ece7f66237118","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/copro/43":{"text":"Analyze the chess position and identify the single best move. Respond with only the move in standard algebraic notation (SAN) or UCI format.","sha256":"b31fb98c20d5be9be53eee395c3e64abefab21e1e3578b567ff251f4f8823674","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/copro/44":{"text":"You are an expert chess grandmaster. Analyze the given chess position and determine the single best move for the player whose turn it is to move. Carefully calculate all forcing lines, including checks, captures, and threats, to find the winning tactical sequence or defensive resource. State the single best move clearly in standard algebraic notation (SAN) or UCI format, and provide a brief explanation of the tactics involved.","sha256":"246b001d06cccf3a01784f0074a9680a7969b617e5553385d4d8707c36b66017","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/gepa/42":{"text":"You are a chess-solving assistant. Your objective is to solve a chess puzzle by identifying the single best tactical move for the active player.\n\n### Input Data\nYou will be provided with three inputs:\n1. `position_fen`: The current board state represented in Forsyth-Edwards Notation (FEN).\n2. `side_to_move`: The color of the player whose turn it is to move ('white' or 'black').\n3. `legal_moves_uci`: A comma-separated list of all currently legal moves in Universal Chess Interface (UCI) format (e.g., `e2e4`, `g5g6`).\n\n### Output Constraints\n- **Strict Format**: You must output exactly **one** move.\n- **Match the Input List**: Your selected move **must** be chosen directly from the provided `legal_moves_uci` list. \n- **Use UCI Notation Only**: Do not use Standard Algebraic Notation (SAN) (e.g., do not write `Rxh1+`, `Nf3`, or `g6+`). Use the exact UCI string representation (e.g., `g7g8`, `g5g6`).\n- **No Extra Text**: Do not include explanations, analysis, alternative candidates, or commentary. Output only the single chosen move string.\n\n### Tactical Methodology\nTo successfully solve the puzzle, do not just select any legal move. You must find the *optimal* tactical solution:\n1. **Analyze the FEN**: Mentally reconstruct the board state and assess material balance, king safety, and active pieces.\n2. **Calculate Forcing Lines**: Prioritize analyzing forcing moves—checks, captures, and strong threats.\n3. **Anticipate Opponent Replies**: For every move you calculate, consider the opponent's best possible replies to ensure your move holds up under optimal play.\n4. **Identify the Tactical Goal**: Look for themes like checkmate, winning significant material, or escaping a lost position through a forced sequence.\n5. **Verify Against the Legal List**: Once you have identified the winning tactical concept, locate its corresponding UCI move in the `legal_moves_uci` list and output it.","sha256":"d45b5c8901cd206d43285ef47020a1775d2b34c50ddef5c716219eba049f5a6c","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/gepa/43":{"text":"Solve the chess puzzle by analyzing the board position and selecting the single best tactical move from the list of legal moves.\n\n### Inputs\nYou will be provided with the following inputs:\n- `position_fen`: The current board state represented in Forsyth-Edwards Notation (FEN).\n- `side_to_move`: The color of the pieces to move next (\"white\" or \"black\").\n- `legal_moves_uci`: A comma-separated list of all legal moves available for the active side, represented in Universal Chess Interface (UCI) format (e.g., `e2e4`, `g8f6`).\n\n### Tactical Analysis Strategy\nTo find the correct winning move (solving the chess tactic), systematically evaluate candidate moves using the following hierarchy:\n1. **Prioritize Forcing Moves:** Analyze candidate moves in the order of:\n   - **Checks:** Moves that directly attack the enemy king.\n   - **Captures:** Moves that take an opponent's piece.\n   - **Threats:** Moves that create strong, immediate threats (e.g., threatening checkmate, trapping a piece, forks, pins, or skewers).\n2. **Calculate Opponent Replies:** For every forcing move you consider, calculate the opponent's most critical replies. Ensure your selected move forcedly leads to a decisive advantage (such as checkmate, winning material, or parrying a lethal threat) and does not have a refutation.\n3. **Verify Legality:** Make sure your chosen move is present in the `legal_moves_uci` list.\n\n### Output Format\nYour output must be extremely concise and contain only the selected UCI move. Do not include any reasoning, evaluations, or extra text. Format your output exactly as follows:\n\n### move\n[uci_move]","sha256":"241652ff5465eb607adf0788839d918d8627aa97d186af01ce16e00406f4d94d","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/gepa/44":{"text":"You are an expert chess engine and tactical solver. Your task is to analyze a given chess position and determine the single best move that solves the chess puzzle.\n\n### Inputs\nYou will receive the following inputs:\n1. `position_fen`: The board state represented in Forsyth-Edwards Notation (FEN).\n2. `side_to_move`: The color (\"white\" or \"black\") whose turn it is to play.\n3. `legal_moves_uci`: A list of all legal moves available in the current position, formatted in UCI (Universal Chess Interface) notation (e.g., `e2e4`, `g8f6`).\n\n### Tactical Resolution Guidelines\nTo find the correct move, apply the following rigorous chess analysis:\n1. **Analyze the Position**: Visualize the board state from the FEN. Identify key features such as king safety, undefended pieces, pins, skewers, forks, and back-rank weaknesses.\n2. **Prioritize Forcing Moves (Checks, Captures, Threats)**: \n   - Always calculate direct checks first.\n   - Look for high-value captures and tactical exchanges.\n   - Look for strong threats that force a defensive response.\n3. **Calculate Opponent Replies**: Do not assume the opponent will play poorly. For every candidate move you consider, calculate the opponent's best defensive reply. The correct move must maintain a decisive advantage or force checkmate against *any* defense.\n4. **Select the Solution**: Identify the single move from the `legal_moves_uci` list that successfully executes the tactic, wins material, or delivers checkmate.\n\n### Output Format\n- Output **only** the single best move in UCI format (e.g., `c8c2`).\n- Do not include any explanations, board diagrams, or extra commentary. Preserve a concise, single-move output.","sha256":"e653370272aa53c94a738f50a20bdbcad579fdca5982e23566fdf62af8604ce7","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/miprov2/42":{"text":"Analyze the given board position (FEN) and determine the absolute best tactical move for the active side. Select exactly one move from the provided list of legal moves (legal_moves_uci). Your response must only contain the selected move with no reasoning, explanations, or labels.\n\nposition_fen: 8/5pkp/2BR2p1/1pP1p3/1P5q/3QP2P/5P1K/r7 b - - 0 32\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, h4d8, h4e7, h4h6, h4f6, h4h5, h4g5, h4g4, h4f4, h4e4, h4d4, h4c4, h4b4, h4h3, h4g3, h4f2, a1a8, a1a7, a1a6, a1a5, a1a4, a1a3, a1a2, a1h1, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, h7h6, f7f6, g6g5, e5e4, h7h5, f7f5\nmove: h4f2\n\nposition_fen: 4r1k1/R5pp/2p5/8/2P2p2/1PNn1P2/P2P2PP/6K1 b - - 4 31\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, d3e5, d3c5, d3b4, d3f2, d3b2, d3e1, d3c1, h7h6, g7g6, c6c5, h7h5, g7g5\nmove: e8e1\n\nposition_fen: 7k/p5pp/3p4/2p1p3/2P3q1/1PQ2rP1/P4n1P/2B1KR2 w - - 0 28\nside_to_move: white\nlegal_moves_uci: c3e5, c3a5, c3d4, c3b4, c3f3, c3e3, c3d3, c3d2, c3c2, c3b2, c3a1, f1f2, f1h1, f1g1, e1e2, e1d2, c1h6, c1g5, c1f4, c1e3, c1a3, c1d2, c1b2, b3b4, h2h3, a2a3, h2h4, a2a4\nmove: f1f2\n\nposition_fen: 5rk1/p4p2/6p1/7p/6P1/5qQK/7P/4R2R b - - 1 36\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8g7, f8e8, f8d8, f8c8, f8b8, f8a8, f3a8, f3b7, f3f6, f3c6, f3f5, f3d5, f3g4, f3f4, f3e4, f3g3, f3e3, f3d3, f3c3, f3b3, f3a3, f3g2, f3f2, f3e2, f3h1, f3f1, f3d1, h5g4, f7f6, a7a6, g6g5, h5h4, f7f5, a7a5\nmove: h5g4\npuzzle_id: 6ziXy\nrating: 2213\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 1","sha256":"6aeaa15f9224f65a731556f9775ea4e485ecf3e3b75122559c2c1fd52cc13d27","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/miprov2/43":{"text":"You are a chess engine tasked with solving tactical puzzles. Analyze the provided board state in FEN notation, taking into account the active side to move. Evaluate the position carefully to identify tactical patterns, threats, and defensive maneuvers. From the list of legal UCI moves, determine the single absolute best move. Output ONLY this selected move, without any markdown formatting, preamble, reasoning, or additional text. Your entire response must be a single legal chess move (e.g., d7g4).\n\nposition_fen: 4k3/2p3R1/2p1P3/1r2KP2/p2P4/r7/8/B7 w - - 7 46\nside_to_move: white\nlegal_moves_uci: e5f6, e5f4, e5e4, d4d5\nmove: e5f6\n\nposition_fen: 8/1kBp1p1p/3Qp3/p2p4/Pn3P2/1P6/3KR2P/1q3r2 w - - 21 33\nside_to_move: white\nlegal_moves_uci: c7d8, c7b8, c7b6, c7a5, d6f8, d6e7, d6d7, d6e6, d6c6, d6b6, d6a6, d6e5, d6d5, d6c5, d6b4, e2e6, e2e5, e2e4, e2e3, e2g2, e2f2, e2e1, d2e3, d2c3, f4f5, h2h3, h2h4\nmove: d6b6\n\nposition_fen: 3k4/8/4PK2/1p3Np1/pP4P1/6p1/1P4P1/2r5 w - - 7 37\nside_to_move: white\nlegal_moves_uci: f6g7, f6f7, f6g6, f6g5, f6e5, f5g7, f5e7, f5h6, f5d6, f5h4, f5d4, f5g3, f5e3, e6e7, b2b3\nmove: f6g5\npuzzle_id: 5eBes\nrating: 2381\nthemes: ['crushing', 'endgame', 'veryLong', 'zugzwang']\nposition_index: 4\n\nposition_fen: 1r1q1r2/1b4p1/p3kbQ1/1pPpn3/1P6/3B4/P2N1PPP/4R1K1 w - - 2 23\nside_to_move: white\nlegal_moves_uci: g6e8, g6h7, g6g7, g6f7, g6h6, g6f6, g6h5, g6g5, g6f5, g6g4, g6e4, g6g3, d3f5, d3b5, d3e4, d3c4, d3e2, d3c2, d3f1, d3b1, d2e4, d2c4, d2f3, d2b3, d2f1, d2b1, g1h1, g1f1, e1e5, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, e1a1, c5c6, h2h3, g2g3, f2f3, a2a3, h2h4, g2g4, f2f4, a2a4\nmove: d3f5\npuzzle_id: CvFPH\nrating: 2145\nthemes: ['deflection', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 0","sha256":"2f492a1be57b2a8365b1f08330e183276779c634b27e3cc6a6219defbc60f644","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/miprov2/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: r1bq1bnr/ppp1k2p/2np4/4pQ2/2B5/2P5/PP1P1PPP/RNB1K1NR w KQ - 1 9\nside_to_move: white\nlegal_moves_uci: f5f8, f5c8, f5h7, f5f7, f5d7, f5g6, f5f6, f5e6, f5h5, f5g5, f5e5, f5g4, f5f4, f5e4, f5h3, f5f3, f5d3, f5c2, c4g8, c4f7, c4e6, c4a6, c4d5, c4b5, c4d3, c4b3, c4e2, c4f1, g1h3, g1f3, g1e2, e1e2, e1f1, e1d1, b1a3, h2h3, g2g3, f2f3, d2d3, b2b3, a2a3, h2h4, g2g4, f2f4, d2d4, b2b4, a2a4\nmove: f5f7\n\nposition_fen: 1r1r3k/p5p1/6Pp/Q6P/8/8/PR3P2/K7 b - - 0 39\nside_to_move: black\nlegal_moves_uci: h8g8, d8g8, d8f8, d8e8, d8c8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, a7a6\nmove: d8d1\n\nposition_fen: 5r2/pppk4/3p2N1/7p/2P1r3/2N5/P5PP/6K1 w - - 0 31\nside_to_move: white\nlegal_moves_uci: g6h8, g6f8, g6e7, g6e5, g6h4, g6f4, c3d5, c3b5, c3e4, c3a4, c3e2, c3d1, c3b1, g1h1, c4c5, h2h3, g2g3, a2a3, h2h4, g2g4, a2a4\nmove: g6f8\n\nposition_fen: 3rk2r/p1Q2pp1/1p1Pp1q1/8/3P4/P4R2/3n2PP/1R4K1 w - - 1 26\nside_to_move: white\nlegal_moves_uci: c7d8, c7c8, c7b8, c7f7, c7e7, c7d7, c7b7, c7a7, c7c6, c7b6, c7c5, c7c4, c7c3, c7c2, c7c1, f3f7, f3f6, f3f5, f3f4, f3h3, f3g3, f3e3, f3d3, f3c3, f3b3, f3f2, f3f1, g1f2, g1h1, b1b6, b1b5, b1b4, b1b3, b1b2, b1f1, b1e1, b1d1, b1c1, b1a1, d6d7, d4d5, a3a4, h2h3, g2g3, h2h4, g2g4\nmove: c7e7","sha256":"26e39db290dbf2521061f33d365c50e89da18e3359a9f56c3c755526e0749d1d","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/simba/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: r1b2Rnk/2p3pB/2p4p/1pq1P1N1/p7/R1P1P3/5PPP/6K1 w - - 1 29\nside_to_move: white\nlegal_moves_uci: f8g8, f8e8, f8d8, f8c8, f8f7, f8f6, f8f5, f8f4, f8f3, h7g8, h7g6, h7f5, h7e4, h7d3, h7c2, h7b1, g5f7, g5e6, g5e4, g5h3, g5f3, a3a4, a3b3, a3a2, a3a1, g1h1, g1f1, e5e6, e3e4, c3c4, h2h3, g2g3, f2f3, h2h4, g2g4, f2f4\nmove: f8g8\n\nposition_fen: 8/5pk1/p3pNp1/1p2P3/6P1/2Q2Pqr/2R1K3/8 b - - 8 37\nside_to_move: black\nlegal_moves_uci: g7h8, g7f8, g7h6, h3h8, h3h7, h3h6, h3h5, h3h4, h3h2, h3h1, g3e5, g3h4, g3g4, g3f4, g3f3, g3h2, g3g2, g3f2, g3g1, g3e1, g6g5, a6a5, b5b4\nmove: g3g2\n\nposition_fen: 3k4/p4Rp1/p7/6p1/Q2PP3/6r1/P5q1/3RK3 b - - 5 26\nside_to_move: black\nlegal_moves_uci: d8c8, g3g4, g3h3, g3f3, g3e3, g3d3, g3c3, g3b3, g3a3, g2e4, g2h3, g2f3, g2h2, g2f2, g2e2, g2d2, g2c2, g2b2, g2a2, g2h1, g2g1, g2f1, g7g6, a6a5, g5g4\nmove: Re3+","sha256":"a2fc722287bc9a0b431b8e80735c851946c0a81853729ccc3bac6c8ec8729374","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/simba/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: r2b1rk1/p5p1/3P4/8/2p3n1/2Pb2R1/P1PQ2PP/R1B1K3 b - - 5 32\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8f7, f8e8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, f8f1, d8e7, d8c7, d8f6, d8b6, d8g5, d8a5, d8h4, a8c8, a8b8, g4h6, g4f6, g4e5, g4e3, g4h2, g4f2, d3h7, d3g6, d3f5, d3e4, d3e2, d3c2, d3f1, g7g6, a7a6, g7g5, a7a5\nmove: f8f1\n\nposition_fen: 4R1b1/1Q6/2pp1k1q/8/8/2N4n/PP4P1/5K2 b - - 1 44\nside_to_move: black\nlegal_moves_uci: g8h7, g8f7, g8e6, g8d5, g8c4, g8b3, g8a2, h6h8, h6f8, h6h7, h6g7, h6g6, h6h5, h6g5, h6h4, h6f4, h6e3, h6d2, h6c1, f6g6, f6g5, f6f5, h3g5, h3f4, h3f2, h3g1, d6d5, c6c5\nmove: h6c1\n\nposition_fen: 7k/p5b1/1p2q1np/8/1PP2N1p/P7/2Q2PPB/7K b - - 0 35\nside_to_move: black\nlegal_moves_uci: h8g8, h8h7, g7f8, g7f6, g7e5, g7d4, g7c3, g7b2, g7a1, g6f8, g6e7, g6e5, g6f4, e6g8, e6e8, e6c8, e6f7, e6e7, e6d7, e6f6, e6d6, e6c6, e6f5, e6e5, e6d5, e6g4, e6e4, e6c4, e6h3, e6e3, e6e2, e6e1, a7a6, h6h5, b6b5, h4h3, a7a5\nmove: e6e1","sha256":"901553bc36f24474eacbdbff22821c580a998a831cad147f0dfbf31d9f2e12fc","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/gemini-3-5-flash-lite/simba/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nWhen analyzing chess puzzles or endgame positions, prioritize calculating forcing moves such as checks and captures first. If the opponent has an imminent promotion threat (e.g., a pawn on g2), passive king moves (like `h6g5`) are unlikely to succeed. Instead, look for active tactical resources such as bishop checks (`d3h7`) that force the opponent's king into a worse position or clear lanes for your own advancing pawns to promote.\n\nposition_fen: r4rk1/pbpn1p1p/1p4p1/4p1q1/P1BPPn2/2P2N2/2Q2PPP/R1B2RK1 b - - 4 15\nside_to_move: black\nlegal_moves_uci: g8h8, g8g7, f8e8, f8d8, f8c8, f8b8, a8e8, a8d8, a8c8, a8b8, d7b8, d7f6, d7c5, b7c8, b7c6, b7a6, b7d5, b7e4, g5d8, g5e7, g5h6, g5f6, g5h5, g5f5, g5h4, g5g4, g5g3, g5g2, f4e6, f4h5, f4d5, f4h3, f4d3, f4g2, f4e2, e5d4, h7h6, c7c6, a7a6, b6b5, h7h5, c7c5, a7a5\nmove: g5g2","sha256":"c64a768f710bb8df08ae45e95e6cc19e82628bbaa704353fbd7888765e2f3522","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/jev-1-13/bfs/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 5b2/7k/1p2p1p1/3pPpPp/1P1P1P1P/8/5K2/2B5 b - - 0 38\nside_to_move: black\nlegal_moves_uci: f8g7, f8e7, f8h6, f8d6, f8c5, f8b4, h7h8, h7g8, h7g7, b6b5\nmove: f8b4\n\nposition_fen: 8/7k/1p2p1p1/3pPpPp/1b1P1P1P/8/4K3/2B5 b - - 1 39\nside_to_move: black\nlegal_moves_uci: h7h8, h7g8, h7g7, b4f8, b4e7, b4d6, b4c5, b4a5, b4c3, b4a3, b4d2, b4e1, b6b5\nmove: b4c3\n\nposition_fen: 3r1r1k/pp2qppp/2p5/3bP1RP/8/1P2Q3/P1P2P2/1K4R1 w - - 2 26\nside_to_move: white\nlegal_moves_uci: g5g7, g5g6, g5f5, g5g4, g5g3, g5g2, e3a7, e3b6, e3c5, e3f4, e3e4, e3d4, e3h3, e3g3, e3f3, e3d3, e3c3, e3e2, e3d2, e3e1, e3c1, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, g1c1, b1b2, b1c1, b1a1, h5h6, e5e6, b3b4, f2f3, c2c3, a2a3, f2f4, c2c4, a2a4\nmove: g5g7\n\nposition_fen: r5rk/p1p2p1p/1p1p2qp/4p3/2P1R2b/3P2NP/P1P2PP1/1R1Q2K1 w - - 4 21\nside_to_move: white\nlegal_moves_uci: e4e5, e4h4, e4g4, e4f4, e4d4, e4e3, e4e2, e4e1, g3h5, g3f5, g3e2, g3h1, g3f1, g1h2, g1h1, g1f1, d1h5, d1g4, d1f3, d1e2, d1d2, d1f1, d1e1, d1c1, b1b6, b1b5, b1b4, b1b3, b1b2, b1c1, b1a1, c4c5, d3d4, f2f3, c2c3, a2a3, f2f4, a2a4\nmove: e4h4\n\nposition_fen: 7r/5k2/2p2b2/2p2P2/2P3K1/5RN1/7P/8 b - - 8 46\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, f7g8, f7f8, f7e8, f7g7, f7e7, f6d8, f6g7, f6e7, f6g5, f6e5, f6h4, f6d4, f6c3, f6b2, f6a1\nmove: h8h4\npuzzle_id: LPIS0\nrating: 2432\nthemes: ['endgame', 'long', 'mate', 'mateIn3', 'operaMate']\nposition_index: 2\n\nposition_fen: r6R/pq1k1p2/1p2b1p1/3P1pb1/6p1/BP1Q2P1/P1B2PK1/8 w - - 5 30\nside_to_move: white\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, h8h1, d3a6, d3f5, d3b5, d3e4, d3d4, d3c4, d3f3, d3e3, d3c3, d3e2, d3d2, d3f1, d3d1, a3f8, a3e7, a3d6, a3c5, a3b4, a3b2, a3c1, g2h2, g2h1, g2g1, g2f1, c2d1, c2b1, b3b4, f2f3, f2f4\nmove: d3b5\npuzzle_id: FZqMM\nrating: 2222\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 6k1/1p1P1p2/4p1p1/P1Rp3p/1P3P2/2Q3KP/6P1/3q2b1 b - - 2 34\nside_to_move: black\nlegal_moves_uci: g8f8, g8h7, g1c5, g1d4, g1e3, g1h2, g1f2, d1g4, d1d4, d1a4, d1f3, d1d3, d1b3, d1e2, d1d2, d1c2, d1f1, d1e1, d1c1, d1b1, d1a1, f7f6, b7b6, g6g5, e6e5, h5h4, d5d4, f7f5, b7b5\nmove: h5h4\npuzzle_id: tyHzQ\nrating: 2434\nthemes: ['attraction', 'endgame', 'fork', 'mate', 'mateIn5', 'veryLong']\nposition_index: 1\n\nposition_fen: 1r3r1k/5ppB/p7/6P1/1p1p1q1Q/6N1/PPP5/1K1b4 w - - 0 31\nside_to_move: white\nlegal_moves_uci: h7g8, h7g6, h7f5, h7e4, h7d3, h4h6, h4h5, h4g4, h4f4, h4h3, h4h2, h4h1, g3h5, g3f5, g3e4, g3e2, g3h1, g3f1, b1a1, g5g6, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: h4f4\npuzzle_id: 4dQTV\nrating: 2685\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: 3k4/7r/1b4B1/8/4pnP1/8/5R2/2R3K1 b - - 15 57\nside_to_move: black\nlegal_moves_uci: d8e7, d8d7, h7h8, h7g7, h7f7, h7e7, h7d7, h7c7, h7b7, h7a7, h7h6, h7h5, h7h4, h7h3, h7h2, h7h1, b6c7, b6a7, b6c5, b6a5, b6d4, b6e3, b6f2, f4g6, f4e6, f4h5, f4d5, f4h3, f4d3, f4g2, f4e2, e4e3\nmove: f4g6\npuzzle_id: 4WNM9\nrating: 2668\nthemes: ['crushing', 'endgame', 'exposedKing', 'master', 'pin', 'veryLong']\nposition_index: 1\n\nposition_fen: 5rk1/p4p2/3Q2p1/5q1p/6P1/5P1K/7P/4R2R b - - 0 35\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8g7, f8e8, f8d8, f8c8, f8b8, f8a8, f5c8, f5d7, f5f6, f5e6, f5g5, f5e5, f5d5, f5c5, f5b5, f5a5, f5g4, f5f4, f5e4, f5f3, f5d3, f5c2, f5b1, h5g4, f7f6, a7a6, g6g5, h5h4, a7a5\nmove: f5f3\npuzzle_id: 6ziXy\nrating: 2213\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: r7/5k2/pp1p1ppp/2pP4/2P2q2/2PB3Q/P1K5/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h3c8, h3d7, h3h6, h3e6, h3h5, h3f5, h3h4, h3g4, h3g3, h3f3, h3e3, h3h2, h3g2, h3h1, h3f1, d3g6, d3f5, d3e4, d3e2, d3f1, c2b3, c2b2, c2d1, c2b1, a2a3, a2a4\nmove: h3d7\npuzzle_id: 5nfOl\nrating: 2156\nthemes: ['attraction', 'crushing', 'deflection', 'endgame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 4r1k1/rp3ppp/p7/P2N4/3P1q2/QP1np2P/2R2PP1/1N3K1R b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, a7a8, f4b8, f4c7, f4h6, f4f6, f4d6, f4g5, f4f5, f4e5, f4h4, f4g4, f4e4, f4d4, f4g3, f4f3, f4h2, f4f2, d3e5, d3c5, d3b4, d3f2, d3b2, d3e1, d3c1, e3f2, h7h6, g7g6, f7f6, b7b6, e3e2, h7h5, g7g5, f7f5, b7b5\nmove: e3e2\npuzzle_id: 3Mg46\nrating: 2418\nthemes: ['advancedPawn', 'long', 'master', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 0\n\nposition_fen: 5rk1/3Q4/2p5/3p4/6p1/1P2r2q/P6p/2RK2R1 w - - 0 36\nside_to_move: white\nlegal_moves_uci: d7e8, d7d8, d7c8, d7h7, d7g7, d7f7, d7e7, d7c7, d7b7, d7a7, d7e6, d7d6, d7c6, d7f5, d7d5, d7g4, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, d1d2, d1c2, c1c6, c1c5, c1c4, c1c3, c1c2, c1b1, c1a1, b3b4, a2a3, a2a4\nmove: g1g4\npuzzle_id: CNFx5\nrating: 1127\nthemes: ['crushing', 'endgame', 'short']\nposition_index: 0\n\nposition_fen: r4r2/5p1k/p2p4/q3nN2/1p4Q1/8/PPP5/2K2nN1 w - - 2 29\nside_to_move: white\nlegal_moves_uci: f5g7, f5e7, f5h6, f5d6, f5h4, f5d4, f5g3, f5e3, g4g8, g4g7, g4g6, g4h5, g4g5, g4h4, g4f4, g4e4, g4d4, g4c4, g4b4, g4h3, g4g3, g4f3, g4g2, g4e2, g4d1, g1h3, g1f3, g1e2, c1d1, c1b1, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: g4g7\npuzzle_id: GJCXh\nrating: 2676\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'veryLong']\nposition_index: 4\n\nposition_fen: r2r2kb/pp2pp1p/2q2npB/4p3/8/2N5/PPPQ1PPP/3R1RK1 w - - 0 15\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, h6g5, h6f4, h6e3, c3d5, c3b5, c3e4, c3a4, c3e2, c3b1, d2d8, d2d7, d2d6, d2g5, d2d5, d2f4, d2d4, d2e3, d2d3, d2e2, d2e1, d2c1, g1h1, f1e1, d1e1, d1c1, d1b1, d1a1, h2h3, g2g3, f2f3, b2b3, a2a3, h2h4, g2g4, f2f4, b2b4, a2a4\nmove: d2d8\npuzzle_id: XLka2\nrating: 640\nthemes: ['crushing', 'kingsideAttack', 'middlegame', 'short']\nposition_index: 0","sha256":"f896ef5aca9d358f108aff287f0e9acb53a426e47d340d173d835f68f9af4cc1","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"bootstrap_few_shot","source":"unavailable","num_iterations":0,"total_metric_calls":null,"num_full_val_evals":null,"best_iteration":null,"best_val_score":null},"whole_run_costs":{"jev":0.2866271939999999},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/jev-1-13/bfs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 6k1/pp6/2p5/3p3p/3P2p1/P3P1PP/1P3K2/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: f2g2, f2e2, f2g1, f2f1, f2e1, h3g4, h3h4, e3e4, a3a4, b2b3, b2b4\nmove: h3g4\n\nposition_fen: 6k1/pp6/2p5/3p4/3P2p1/P3P1P1/1P3K2/8 w - - 0 34\nside_to_move: white\nlegal_moves_uci: f2g2, f2e2, f2g1, f2f1, f2e1, e3e4, a3a4, b2b3, b2b4\nmove: e3e4\n\nposition_fen: 8/3r1pkp/P5p1/2b1R3/2P1P3/8/2R3PP/7K b - - 1 43\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, g7f6, d7d8, d7e7, d7c7, d7b7, d7a7, d7d6, d7d5, d7d4, d7d3, d7d2, d7d1, c5f8, c5e7, c5a7, c5d6, c5b6, c5d4, c5b4, c5e3, c5a3, c5f2, c5g1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: d7d1\n\nposition_fen: 7r/1p1kn3/8/1N1P1p2/8/4Ppp1/PP1RK1Pr/4N3 w - - 0 31\nside_to_move: white\nlegal_moves_uci: e2f3, e2d3, e2f1, e2d1, e1f3\nmove: e2f3\n\nposition_fen: 3r4/5k2/8/1p2PKp1/pP1N2P1/6p1/1P4P1/8 w - - 4 33\nside_to_move: white\nlegal_moves_uci: f5g5, f5e4, d4e6, d4c6, d4b5, d4f3, d4b3, d4e2, d4c2, e5e6, b2b3\nmove: e5e6\npuzzle_id: 5eBes\nrating: 2381\nthemes: ['crushing', 'endgame', 'veryLong', 'zugzwang']\nposition_index: 0\n\nposition_fen: 5rkr/pp2q1p1/4n1Q1/3nPR1p/4N3/8/PP4PP/5R1K w - - 8 24\nside_to_move: white\nlegal_moves_uci: g6e8, g6h7, g6g7, g6f7, g6h6, g6f6, g6e6, g6h5, g6g5, g6g4, g6g3, f5f8, f5f7, f5f6, f5h5, f5g5, f5f4, f5f3, f5f2, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h1g1, f1f4, f1f3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: g6e6\npuzzle_id: 4uOji\nrating: 2195\nthemes: ['crushing', 'deflection', 'fork', 'master', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: Rn4k1/6pp/3p4/1B1Pq3/1PN1n3/7P/2P2RK1/3Q4 b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e5e8, e5e7, e5f6, e5e6, e5h5, e5g5, e5f5, e5d5, e5f4, e5d4, e5g3, e5c3, e5h2, e5b2, e5a1, e4f6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h7h6, g7g6, h7h5, g7g5\nmove: e5g3\npuzzle_id: u5Z6U\nrating: 2563\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: 8/6nk/p3p2p/1b1pNp1N/1b1P1P1P/4q3/6PK/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h5g7, h5f6, h5g3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, h2h1, g2g3, g2g4\nmove: h5f6\npuzzle_id: saT5n\nrating: 2740\nthemes: ['long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 7r/5pk1/3p1P2/1p4q1/3p4/PQ1B4/1P3p2/5K1R b - - 0 46\nside_to_move: black\nlegal_moves_uci: g7g8, g7f8, g7f6, g5f6\nmove: g7f6\npuzzle_id: xAiWS\nrating: 2314\nthemes: ['advantage', 'endgame', 'exposedKing', 'long', 'skewer']\nposition_index: 0\n\nposition_fen: 7k/p5pp/3p4/2p1p3/2P3q1/1PQ2rP1/P4n1P/2B1KR2 w - - 0 28\nside_to_move: white\nlegal_moves_uci: c3e5, c3a5, c3d4, c3b4, c3f3, c3e3, c3d3, c3d2, c3c2, c3b2, c3a1, f1f2, f1h1, f1g1, e1e2, e1d2, c1h6, c1g5, c1f4, c1e3, c1a3, c1d2, c1b2, b3b4, h2h3, a2a3, h2h4, a2a4\nmove: f1f2\npuzzle_id: KXgrS\nrating: 2165\nthemes: ['advantage', 'long', 'middlegame']\nposition_index: 2\n\nposition_fen: 6n1/1p4Pk/2p1N2P/p5K1/8/8/8/8 w - - 1 53\nside_to_move: white\nlegal_moves_uci: e6f8, e6d8, e6c7, e6c5, e6f4, e6d4, g5h5, g5f5, g5h4, g5g4, g5f4\nmove: e6f8\npuzzle_id: mZF9a\nrating: 513\nthemes: ['endgame', 'knightEndgame', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0\n\nposition_fen: 4rr2/p7/1p3k1p/2p1Rp2/6p1/P7/1P3PPP/4RK2 w - - 5 26\nside_to_move: white\nlegal_moves_uci: e5e8, e5e7, e5e6, e5f5, e5d5, e5c5, e5e4, e5e3, e5e2, f1e2, f1g1, e1e4, e1e3, e1e2, e1d1, e1c1, e1b1, e1a1, a3a4, h2h3, g2g3, f2f3, b2b3, h2h4, f2f4, b2b4\nmove: e5e8\npuzzle_id: vOxk6\nrating: 939\nthemes: ['crushing', 'endgame', 'rookEndgame', 'short']\nposition_index: 0\n\nposition_fen: 1r5k/p5p1/6Pp/Q6P/8/8/P4P2/KR1r4 b - - 2 40\nside_to_move: black\nlegal_moves_uci: h8g8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1h1, d1g1, d1f1, d1e1, d1c1, d1b1, a7a6\nmove: d1b1\npuzzle_id: TMIoF\nrating: 1117\nthemes: ['endgame', 'mate', 'mateIn2', 'queenRookEndgame', 'short']\nposition_index: 1\n\nposition_fen: 1R6/4k3/7r/2p3K1/4p3/8/8/8 w - - 0 53\nside_to_move: white\nlegal_moves_uci: b8h8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, g5h6, g5f5, g5g4, g5f4\nmove: g5h6\npuzzle_id: 0ErLd\nrating: 2296\nthemes: ['crushing', 'endgame', 'exposedKing', 'rookEndgame', 'veryLong']\nposition_index: 3\n\nposition_fen: Q2qkb1r/p2bpppp/8/1B1P4/4nB2/4PK2/PP1p1PPP/n5NR w k - 1 16\nside_to_move: white\nlegal_moves_uci: a8d8, a8c8, a8b8, a8b7, a8a7, a8c6, b5d7, b5c6, b5a6, b5c4, b5a4, b5d3, b5e2, b5f1, f4b8, f4c7, f4h6, f4d6, f4g5, f4e5, f4g3, f3e4, f3e2, g1h3, g1e2, d5d6, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: b5d7\npuzzle_id: lQxX8\nrating: 2532\nthemes: ['attraction', 'clearance', 'fork', 'mate', 'mateIn5', 'middlegame', 'pin', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: 1k6/1P6/1K6/6B1/6P1/8/8/4q3 w - - 0 56\nside_to_move: white\nlegal_moves_uci: b6c6, b6a6, b6c5, b6b5, g5d8, g5e7, g5h6, g5f6, g5h4, g5f4, g5e3, g5d2, g5c1\nmove: g5f4\npuzzle_id: Nx8za\nrating: 836\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 0","sha256":"c4987f88cf65ee8e25b833a796453376222854cab22aa5be2ff1d9ced4a4050c","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"bootstrap_few_shot","source":"unavailable","num_iterations":0,"total_metric_calls":null,"num_full_val_evals":null,"best_iteration":null,"best_val_score":null},"whole_run_costs":{"jev":0.2256752820000001},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/jev-1-13/bfs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 3rk3/1p1q4/p3nQR1/4Pp2/3p4/P6P/1P1r4/7K w - - 5 50\nside_to_move: white\nlegal_moves_uci: g6g8, g6g7, g6h6, g6g5, g6g4, g6g3, g6g2, g6g1, f6h8, f6f8, f6d8, f6g7, f6f7, f6e7, f6e6, f6g5, f6f5, f6h4, h1g1, h3h4, a3a4, b2b3, b2b4\nmove: g6g8\n\nposition_fen: 7k/ppp4p/8/4p3/4qr2/7P/1PP3R1/3Q3K w - - 2 31\nside_to_move: white\nlegal_moves_uci: h1h2, h1g1, d1d8, d1d7, d1d6, d1h5, d1d5, d1g4, d1d4, d1f3, d1d3, d1e2, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, h3h4, c2c3, b2b3, c2c4, b2b4\nmove: d1d8\n\nposition_fen: 3Q1r1k/ppp4p/8/4p3/4q3/7P/1PP3R1/7K w - - 4 32\nside_to_move: white\nlegal_moves_uci: d8f8, d8e8, d8c8, d8b8, d8a8, d8e7, d8d7, d8c7, d8f6, d8d6, d8g5, d8d5, d8h4, d8d4, d8d3, d8d2, d8d1, h1h2, h1g1, h3h4, c2c3, b2b3, c2c4, b2b4\nmove: d8f8\n\nposition_fen: r2r2k1/ppp2p1p/5p2/5Q2/8/5P2/PPP3PP/1K1R1B1R b - - 0 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8g7, d8f8, d8e8, d8c8, d8b8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, a8c8, a8b8, h7h6, c7c6, b7b6, a7a6, h7h5, c7c5, b7b5, a7a5\nmove: d8d1\n\nposition_fen: r3r1k1/1p1qbppp/p1n5/2pp1N2/6N1/2PP3P/PP3PP1/R2QR1K1 b - - 6 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, a8d8, a8c8, a8b8, a8a7, e7f8, e7d8, e7f6, e7d6, e7g5, e7h4, d7d8, d7c8, d7c7, d7e6, d7d6, d7f5, c6d8, c6b8, c6a7, c6e5, c6a5, c6d4, c6b4, h7h6, g7g6, f7f6, b7b6, a6a5, d5d4, c5c4, h7h5, g7g5, b7b5\nmove: d7f5\npuzzle_id: DmJlo\nrating: 792\nthemes: ['advantage', 'hangingPiece', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: 3r1rk1/4R2p/p4bp1/1p3p2/4QPP1/8/P4q1P/3R3K w - - 0 29\nside_to_move: white\nlegal_moves_uci: e7e8, e7h7, e7g7, e7f7, e7d7, e7c7, e7b7, e7a7, e7e6, e7e5, e4a8, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4d4, e4c4, e4b4, e4a4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, e4b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, g4f5, g4g5, h2h3, a2a3, h2h4, a2a4\nmove: e4e6\npuzzle_id: 0PhbW\nrating: 2606\nthemes: ['deflection', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 7k/3n2p1/4Q2p/3p2N1/8/3q4/1P3KPP/r3B3 w - - 0 29\nside_to_move: white\nlegal_moves_uci: e6g8, e6e8, e6f7, e6e7, e6d7, e6h6, e6g6, e6f6, e6d6, e6c6, e6b6, e6a6, e6f5, e6e5, e6d5, e6g4, e6e4, e6h3, e6e3, e6e2, g5h7, g5f7, g5e4, g5h3, g5f3, f2g1, e1a5, e1b4, e1c3, e1d2, h2h3, g2g3, b2b3, h2h4, g2g4, b2b4\nmove: e6e8\npuzzle_id: vyvus\nrating: 1408\nthemes: ['endgame', 'fork', 'mate', 'mateIn2', 'short']\nposition_index: 0\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb2k/2p4P/8/2P2Q2/PP1P1PP1/RNB1K2R w KQ - 1 13\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1h4, h1h3, h1h2, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, g2g3, d2d3, b2b3, a2a3, g2g4, d2d4, b2b4, a2a4\nmove: f3e3\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 2\n\nposition_fen: 4k3/2p3R1/2p1PK2/5r2/p2P4/r7/8/B7 w - - 0 47\nside_to_move: white\nlegal_moves_uci: f6g6, f6f5\nmove: f6f5\npuzzle_id: 52eVA\nrating: 2338\nthemes: ['crushing', 'defensiveMove', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: 1r4RQ/p5r1/2n1pk1p/5p1q/2PP4/5P2/P4P1P/R6K w - - 6 31\nside_to_move: white\nlegal_moves_uci: h8h7, h8g7, h8h6, g8f8, g8e8, g8d8, g8c8, g8b8, g8g7, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, d4d5, c4c5, f3f4, h2h3, a2a3, h2h4, a2a4\nmove: h8g7\npuzzle_id: C9c6a\nrating: 2054\nthemes: ['discoveredAttack', 'discoveredCheck', 'exposedKing', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: rn3rk1/4b2p/6pB/pp1p2N1/8/P5nP/1P3PP1/R3R1K1 w - - 0 29\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, g5h7, g5f7, g5e6, g5e4, g5f3, g1h2, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, a1a2, a1d1, a1c1, a1b1, f2g3, h3h4, a3a4, f2f3, b2b3, f2f4, b2b4\nmove: e1e7\npuzzle_id: mPgSs\nrating: 2619\nthemes: ['crushing', 'discoveredAttack', 'discoveredCheck', 'kingsideAttack', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: r4rk1/ppp2pq1/3p2p1/3Np1n1/3nP1pQ/8/PPP2P2/1K3B1R w - - 4 19\nside_to_move: white\nlegal_moves_uci: d5e7, d5c7, d5f6, d5b6, d5f4, d5b4, d5e3, d5c3, h4h8, h4h7, h4h6, h4h5, h4g5, h4g4, h4h3, h4g3, h4h2, h1h3, h1h2, h1g1, f1a6, f1b5, f1c4, f1h3, f1d3, f1g2, f1e2, b1c1, b1a1, f2f3, c2c3, b2b3, a2a3, f2f4, c2c4, b2b4, a2a4\nmove: d5e7\npuzzle_id: m17EB\nrating: 1277\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 8/5pkp/2BR2p1/1pP1p3/1P5q/3QP2P/5P1K/r7 b - - 0 32\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, h4d8, h4e7, h4h6, h4f6, h4h5, h4g5, h4g4, h4f4, h4e4, h4d4, h4c4, h4b4, h4h3, h4g3, h4f2, a1a8, a1a7, a1a6, a1a5, a1a4, a1a3, a1a2, a1h1, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, h7h6, f7f6, g6g5, e5e4, h7h5, f7f5\nmove: h4f2\npuzzle_id: HNck2\nrating: 2516\nthemes: ['advantage', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb3/2p3k1/8/2P2Q2/PP1P1PPP/RNB1K2R w KQ - 0 11\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3h5, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, h2h3, g2g3, d2d3, b2b3, a2a3, h2h4, g2g4, d2d4, b2b4, a2a4\nmove: h2h4\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 0\n\nposition_fen: r5k1/3n1pbp/6p1/8/3Bq3/1P5P/P1RQ2P1/1K5R b - - 3 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, a8a6, a8a5, a8a4, a8a3, a8a2, g7h8, g7f8, g7h6, g7f6, g7e5, g7d4, d7f8, d7b8, d7f6, d7b6, d7e5, d7c5, e4e8, e4e7, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4h4, e4g4, e4f4, e4d4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: g7d4\npuzzle_id: uHEok\nrating: 1301\nthemes: ['crushing', 'discoveredAttack', 'middlegame', 'short']\nposition_index: 1","sha256":"e808a48edb04b12153c6c7e47c2fc310da6515d3bb281556cc45c054ea4b335a","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"bootstrap_few_shot","source":"unavailable","num_iterations":0,"total_metric_calls":null,"num_full_val_evals":null,"best_iteration":null,"best_val_score":null},"whole_run_costs":{"jev":0.2853356939999997},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/jev-1-13/brs/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 5b2/7k/1p2p1p1/3pPpPp/1P1P1P1P/8/5K2/2B5 b - - 0 38\nside_to_move: black\nlegal_moves_uci: f8g7, f8e7, f8h6, f8d6, f8c5, f8b4, h7h8, h7g8, h7g7, b6b5\nmove: f8b4\n\nposition_fen: r5k1/p1p3pp/3p1q2/b7/4QP2/P5PP/K1P5/1b1R3R w - - 0 23\nside_to_move: white\nlegal_moves_uci: a2b3, a2b1, d1b1\nmove: d1b1\n\nposition_fen: r1br3k/pp2pQbp/6p1/qB2P3/8/8/P2B2PP/R4R1K w - - 1 20\nside_to_move: white\nlegal_moves_uci: f7g8, f7f8, f7e8, f7g7, f7e7, f7g6, f7f6, f7e6, f7f5, f7d5, f7f4, f7c4, f7f3, f7b3, f7f2, b5e8, b5d7, b5c6, b5a6, b5c4, b5a4, b5d3, b5e2, d2h6, d2g5, d2a5, d2f4, d2b4, d2e3, d2c3, d2e1, d2c1, h1g1, f1f6, f1f5, f1f4, f1f3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, a1e1, a1d1, a1c1, a1b1, e5e6, h2h3, g2g3, a2a3, h2h4, g2g4, a2a4\nmove: d2a5\npuzzle_id: Hmz5i\nrating: 1603\nthemes: ['crushing', 'middlegame', 'short']\nposition_index: 1\n\nposition_fen: r5k1/pp5p/3bq1p1/3p2Bn/1pnP4/3Q1P2/P1P4P/4RNK1 w - - 0 27\nside_to_move: white\nlegal_moves_uci: g5d8, g5e7, g5h6, g5f6, g5h4, g5f4, g5e3, g5d2, g5c1, d3g6, d3f5, d3e4, d3c4, d3e3, d3c3, d3b3, d3a3, d3e2, d3d2, d3d1, g1g2, g1f2, g1h1, f1g3, f1e3, f1d2, e1e6, e1e5, e1e4, e1e3, e1e2, e1d1, e1c1, e1b1, e1a1, f3f4, h2h3, c2c3, a2a3, h2h4, a2a4\nmove: e1e6\npuzzle_id: Csb0w\nrating: 1106\nthemes: ['crushing', 'master', 'middlegame', 'pin', 'short']\nposition_index: 1\n\nposition_fen: 4Qn1k/6p1/7p/3p2N1/8/3q4/1P3KPP/r3B3 w - - 2 30\nside_to_move: white\nlegal_moves_uci: e8f8, e8d8, e8c8, e8b8, e8a8, e8f7, e8e7, e8d7, e8g6, e8e6, e8c6, e8h5, e8e5, e8b5, e8e4, e8a4, e8e3, e8e2, g5h7, g5f7, g5e6, g5e4, g5h3, g5f3, f2g1, e1a5, e1b4, e1c3, e1d2, h2h3, g2g3, b2b3, h2h4, g2g4, b2b4\nmove: e8f8\npuzzle_id: vyvus\nrating: 1408\nthemes: ['endgame', 'fork', 'mate', 'mateIn2', 'short']\nposition_index: 1\n\nposition_fen: 8/5p2/3p1kp1/2pP1n1p/1pP1BP1P/pP3KP1/P7/8 b - - 4 36\nside_to_move: black\nlegal_moves_uci: f6g7, f6e7, f5g7, f5e7, f5h6, f5h4, f5d4, f5g3, f5e3, g6g5\nmove: f5d4\npuzzle_id: LqEkl\nrating: 1852\nthemes: ['crushing', 'endgame', 'short']\nposition_index: 0\n\nposition_fen: 3r2k1/p4p1p/2q1p1p1/2P5/8/1PQ2PP1/P5KP/3R4 b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8f8, d8f8, d8e8, d8c8, d8b8, d8a8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, c6e8, c6c8, c6a8, c6d7, c6c7, c6b7, c6d6, c6b6, c6a6, c6d5, c6c5, c6b5, c6e4, c6a4, c6f3, h7h6, f7f6, a7a6, g6g5, e6e5, h7h5, f7f5, a7a5\nmove: d8d1\npuzzle_id: DO7ZK\nrating: 2079\nthemes: ['crushing', 'endgame', 'veryLong']\nposition_index: 3\n\nposition_fen: 3Q4/p4N1p/4p1p1/5p2/P3k3/2q3PP/5P1K/2r5 w - - 3 38\nside_to_move: white\nlegal_moves_uci: d8h8, d8g8, d8f8, d8e8, d8c8, d8b8, d8a8, d8e7, d8d7, d8c7, d8f6, d8d6, d8b6, d8g5, d8d5, d8a5, d8h4, d8d4, d8d3, d8d2, d8d1, f7h8, f7h6, f7d6, f7g5, f7e5, h2g2, a4a5, h3h4, g3g4, f2f3, f2f4\nmove: f7g5\npuzzle_id: phdll\nrating: 1939\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 0\n\nposition_fen: r6r/1pp2kp1/p4Pp1/3P4/3Q4/2N2R2/PPP4q/4RK2 b - - 1 23\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8h7, h8h6, h8h5, h8h4, h8h3, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, f7g8, f7f8, h2h7, h2h6, h2d6, h2h5, h2e5, h2h4, h2f4, h2h3, h2g3, h2g2, h2f2, h2e2, h2d2, h2c2, h2h1, h2g1, g7f6, c7c6, b7b6, g6g5, a6a5, c7c5, b7b5\nmove: h2h1\npuzzle_id: dJaOf\nrating: 2294\nthemes: ['advantage', 'deflection', 'discoveredAttack', 'fork', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: r3r3/3qkp2/p6Q/2p1p3/3b2P1/4B1P1/PP3PK1/7R w - - 3 34\nside_to_move: white\nlegal_moves_uci: h6h8, h6f8, h6h7, h6g7, h6g6, h6f6, h6e6, h6d6, h6c6, h6b6, h6a6, h6h5, h6g5, h6h4, h6f4, h6h3, h6h2, e3g5, e3f4, e3d4, e3d2, e3c1, g2h3, g2f3, g2h2, g2g1, g2f1, h1h5, h1h4, h1h3, h1h2, h1g1, h1f1, h1e1, h1d1, h1c1, h1b1, h1a1, g4g5, f2f3, b2b3, a2a3, f2f4, b2b4, a2a4\nmove: e3g5\npuzzle_id: wUTyK\nrating: 2707\nthemes: ['dovetailMate', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 8/3k1p2/8/K5P1/1p4r1/3B4/PPP5/8 w - - 1 51\nside_to_move: white\nlegal_moves_uci: a5b6, a5a6, a5b5, a5a4, d3h7, d3g6, d3a6, d3f5, d3b5, d3e4, d3c4, d3e2, d3f1, g5g6, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: d3f5\npuzzle_id: erKak\nrating: 839\nthemes: ['crushing', 'endgame', 'fork', 'master', 'short']\nposition_index: 0\n\nposition_fen: 5rk1/p2pppbp/Q1p3p1/8/4NB2/8/qrP1BPPP/2KR3R b - - 0 18\nside_to_move: black\nlegal_moves_uci: g8h8, f8e8, f8d8, f8c8, f8b8, f8a8, g7h8, g7h6, g7f6, g7e5, g7d4, g7c3, b2b8, b2b7, b2b6, b2b5, b2b4, b2b3, b2c2, b2b1, a2e6, a2a6, a2d5, a2a5, a2c4, a2a4, a2b3, a2a3, a2b1, a2a1, h7h6, f7f6, e7e6, d7d6, g6g5, c6c5, h7h5, f7f5, e7e5, d7d5\nmove: b2c2\npuzzle_id: 4ZLiO\nrating: 1695\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove', 'queensideAttack']\nposition_index: 0\n\nposition_fen: r7/p1p3pk/3b3p/4N3/2PpP3/7q/PPQ2P2/R4RK1 b - - 0 27\nside_to_move: black\nlegal_moves_uci: a8h8, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, h7h8, h7g8, d6f8, d6e7, d6e5, d6c5, d6b4, d6a3, h3c8, h3d7, h3e6, h3h5, h3f5, h3h4, h3g4, h3g3, h3f3, h3e3, h3d3, h3c3, h3b3, h3a3, h3h2, h3g2, h3h1, h3f1, g7g6, c7c6, a7a6, h6h5, d4d3, g7g5, c7c5, a7a5\nmove: d6e5\npuzzle_id: qcwPi\nrating: 2416\nthemes: ['advantage', 'attraction', 'fork', 'middlegame', 'veryLong']\nposition_index: 1\n\nposition_fen: 5rk1/1b2bppp/ppr1p3/3qB3/3P2Q1/4P1nP/PP4PN/1B1R1RK1 b - - 4 22\nside_to_move: black\nlegal_moves_uci: g8h8, f8e8, f8d8, f8c8, f8b8, f8a8, e7d8, e7f6, e7d6, e7g5, e7c5, e7h4, e7b4, e7a3, b7c8, b7a8, c6c8, c6c7, c6d6, c6c5, c6c4, c6c3, c6c2, c6c1, d5d8, d5d7, d5d6, d5e5, d5c5, d5b5, d5a5, d5e4, d5d4, d5c4, d5f3, d5b3, d5g2, d5a2, g3h5, g3f5, g3e4, g3e2, g3h1, g3f1, h7h6, g7g6, f7f6, b6b5, a6a5, h7h5, g7g5, f7f5\nmove: d5g2\npuzzle_id: 5OnYn\nrating: 2183\nthemes: ['attraction', 'discoveredCheck', 'doubleCheck', 'kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: 4r1k1/bp3pp1/p1pB3p/8/1PPp4/P6P/2P2PP1/4R1K1 b - - 0 23\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, a7b8, a7b6, a7c5, g7g6, f7f6, b7b6, h6h5, c6c5, a6a5, d4d3, g7g5, f7f5, b7b5\nmove: e8e1\npuzzle_id: jR4S3\nrating: 553\nthemes: ['crushing', 'endgame', 'kingsideAttack', 'short']\nposition_index: 1\n\nposition_fen: 6r1/5k2/2p2b2/2p2P1K/2P5/5RN1/7P/8 b - - 6 45\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8e8, g8d8, g8c8, g8b8, g8a8, g8g7, g8g6, g8g5, g8g4, g8g3, f7f8, f7e8, f7g7, f7e7, f6h8, f6d8, f6g7, f6e7, f6g5, f6e5, f6h4, f6d4, f6c3, f6b2, f6a1\nmove: g8h8\npuzzle_id: LPIS0\nrating: 2432\nthemes: ['endgame', 'long', 'mate', 'mateIn3', 'operaMate']\nposition_index: 1","sha256":"ea8daafd177bbbec3591bda8b90eb5659dd92c172a28b589e51d2004a83d245f","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"bootstrap_random_search","source":"candidate_programs","num_iterations":19,"total_metric_calls":null,"num_full_val_evals":null,"best_iteration":6,"best_val_score":17.75},"whole_run_costs":{"jev":1.4835411780000034},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/jev-1-13/brs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 8/8/p1k1p2p/2p1Pp2/1P3KP1/1PP5/7P/8 b - - 0 38\nside_to_move: black\nlegal_moves_uci: c6d7, c6c7, c6b7, c6b6, c6d5, c6b5, f5g4, c5b4, h6h5, a6a5, c5c4\nmove: c5b4\n\nposition_fen: 4r1k1/p1p2pp1/7p/8/5P2/6P1/PPPR3P/1K6 b - - 2 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8h7, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, g7g6, f7f6, c7c6, a7a6, h6h5, g7g5, f7f5, c7c5, a7a5\nmove: e8e1\n\nposition_fen: 4r1k1/bp3pp1/p1pB3p/8/1PPp4/P6P/2P2PP1/4R1K1 b - - 0 23\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, a7b8, a7b6, a7c5, g7g6, f7f6, b7b6, h6h5, c6c5, a6a5, d4d3, g7g5, f7f5, b7b5\nmove: e8e1\n\nposition_fen: 2r1r1k1/5pp1/4bn1p/3pq3/3npP2/PPBP3P/B5P1/2RQNRK1 b - f3 0 23\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8h7, e8f8, e8d8, e8e7, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, c8c4, c8c3, f6h7, f6d7, f6h5, f6g4, e6d7, e6f5, e6g4, e6h3, e5b8, e5c7, e5d6, e5h5, e5g5, e5f5, e5f4, d4c6, d4f5, d4b5, d4f3, d4b3, d4e2, d4c2, e4d3, g7g6, h6h5, e4e3, g7g5, e4f3\nmove: e4f3\n\nposition_fen: r1bQ4/pp3k1p/2pp2p1/3P4/2P3P1/3B1n1P/PPK2P2/4q2R w - - 2 23\nside_to_move: white\nlegal_moves_uci: d8h8, d8g8, d8f8, d8e8, d8c8, d8e7, d8d7, d8c7, d8f6, d8d6, d8b6, d8g5, d8a5, d8h4, d3g6, d3f5, d3e4, d3e2, d3f1, c2b3, h1h2, h1g1, h1f1, h1e1, d5c6, g4g5, c4c5, h3h4, b2b3, a2a3, b2b4, a2a4\nmove: h1e1\npuzzle_id: nG87C\nrating: 1454\nthemes: ['crushing', 'intermezzo', 'middlegame', 'short']\nposition_index: 1\n\nposition_fen: 8/8/7k/p1p1pKp1/3pP3/1P1P4/P1P5/8 b - - 3 37\nside_to_move: black\nlegal_moves_uci: h6h7, h6g7, h6h5, g5g4, c5c4, a5a4\nmove: h6h5\npuzzle_id: 57RiF\nrating: 2090\nthemes: ['crushing', 'endgame', 'pawnEndgame', 'quietMove', 'veryLong']\nposition_index: 2\n\nposition_fen: 2b2rkb/3p1p2/4pPp1/q1p1N1P1/1p1nQ3/1P6/rB1P1PB1/2KR3R w - - 4 21\nside_to_move: white\nlegal_moves_uci: e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, e4a8, e4b7, e4g6, e4c6, e4f5, e4d5, e4h4, e4g4, e4f4, e4d4, e4f3, e4e3, e4d3, e4e2, e4c2, e4e1, e4b1, g2h3, g2f3, g2f1, b2d4, b2c3, b2a3, b2a1, h1h8, h1h7, h1h6, h1h5, h1h4, h1h3, h1h2, h1g1, h1f1, h1e1, d1g1, d1f1, d1e1, c1b1, f2f3, d2d3, f2f4\nmove: h1h8\npuzzle_id: NXAep\nrating: 2247\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: r5k1/pp2q1p1/3b3P/4n3/8/PP5Q/1BPN1K2/R6R b - - 0 24\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8h7, g8f7, a8f8, a8e8, a8d8, a8c8, a8b8, e7f8, e7e8, e7d8, e7f7, e7d7, e7c7, e7f6, e7e6, e7g5, e7h4, d6b8, d6c7, d6c5, d6b4, d6a3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, g7h6, g7g6, b7b6, a7a6, g7g5, b7b5, a7a5\nmove: a8f8\npuzzle_id: y7SzX\nrating: 2278\nthemes: ['advantage', 'attraction', 'discoveredAttack', 'discoveredCheck', 'fork', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 8/1p6/p2R3p/2R3p1/b4k2/5P1P/r1n3PK/8 w - - 6 38\nside_to_move: white\nlegal_moves_uci: d6d8, d6d7, d6h6, d6g6, d6f6, d6e6, d6c6, d6b6, d6a6, d6d5, d6d4, d6d3, d6d2, d6d1, c5c8, c5c7, c5c6, c5g5, c5f5, c5e5, c5d5, c5b5, c5a5, c5c4, c5c3, c5c2, h2h1, h2g1, h3h4, g2g3, g2g4\nmove: d6e6\npuzzle_id: tUyWO\nrating: 2735\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 2\n\nposition_fen: 4n1Q1/1b4p1/p2k1q1p/3p1B2/5PP1/1PP5/PK5P/8 w - - 3 32\nside_to_move: white\nlegal_moves_uci: g8h8, g8f8, g8e8, g8h7, g8g7, g8f7, g8e6, g8d5, f5c8, f5h7, f5d7, f5g6, f5e6, f5e4, f5d3, f5c2, f5b1, b2a3, b2c2, b2c1, b2b1, b2a1, g4g5, b3b4, h2h3, a2a3, h2h4, a2a4\nmove: g8e8\npuzzle_id: stOQL\nrating: 990\nthemes: ['crushing', 'endgame', 'hangingPiece', 'oneMove']\nposition_index: 0\n\nposition_fen: 4r1k1/ppp2ppp/3r4/2P3qb/1P6/P2PnP2/3BB1PP/R1Q1R2K b - - 0 21\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, d6d8, d6d7, d6h6, d6g6, d6f6, d6e6, d6c6, d6b6, d6a6, d6d5, d6d4, d6d3, h5g6, h5g4, h5f3, g5d8, g5e7, g5h6, g5g6, g5f6, g5f5, g5e5, g5d5, g5c5, g5h4, g5g4, g5f4, g5g3, g5g2, e3f5, e3d5, e3g4, e3c4, e3g2, e3c2, e3f1, e3d1, h7h6, g7g6, f7f6, c7c6, b7b6, a7a6, f7f5, b7b5, a7a5\nmove: g5g2\npuzzle_id: hoDcA\nrating: 1206\nthemes: ['kingsideAttack', 'mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: QR6/5k2/1p3p2/6pp/8/6PK/r6P/8 b - - 0 40\nside_to_move: black\nlegal_moves_uci: f7g7, f7e7, f7g6, f7e6, a2a8, a2a7, a2a6, a2a5, a2a4, a2a3, a2h2, a2g2, a2f2, a2e2, a2d2, a2c2, a2b2, a2a1, f6f5, b6b5, h5h4, g5g4\nmove: g5g4\npuzzle_id: F96Cn\nrating: 990\nthemes: ['deflection', 'endgame', 'mate', 'mateIn2', 'queenRookEndgame', 'short']\nposition_index: 0\n\nposition_fen: 1r6/p1k3pQ/2pp4/2p1p1P1/4Pn2/2NP4/PPP2q2/2K4R b - - 4 25\nside_to_move: black\nlegal_moves_uci: b8h8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, c7d8, c7c8, c7d7, c7b7, c7b6, f4g6, f4e6, f4h5, f4d5, f4h3, f4d3, f4g2, f4e2, f2h4, f2d4, f2g3, f2f3, f2e3, f2h2, f2g2, f2e2, f2d2, f2c2, f2g1, f2f1, f2e1, a7a6, d6d5, c5c4, a7a5\nmove: f4d3\npuzzle_id: o5Xmz\nrating: 2039\nthemes: ['crushing', 'defensiveMove', 'endgame', 'fork', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/6nk/p3p2p/1b1pNp1N/1b1P1P1P/4q3/6PK/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h5g7, h5f6, h5g3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, h2h1, g2g3, g2g4\nmove: h5f6\npuzzle_id: saT5n\nrating: 2740\nthemes: ['long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 6k1/6pp/8/Q2Pp3/4Pn2/P7/3K1P1P/3B2q1 b - - 6 31\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8f7, f4g6, f4e6, f4h5, f4d5, f4h3, f4d3, f4g2, f4e2, g1g6, g1g5, g1g4, g1g3, g1h2, g1g2, g1f2, g1h1, g1f1, g1e1, g1d1, h7h6, g7g6, h7h5, g7g5\nmove: g1f2\npuzzle_id: ajhQg\nrating: 2434\nthemes: ['crushing', 'deflection', 'endgame', 'veryLong']\nposition_index: 3\n\nposition_fen: r3r1k1/pp1q4/n1pbbpN1/3p3Q/3P4/6P1/PPP1N1PP/R5K1 w - - 0 18\nside_to_move: white\nlegal_moves_uci: g6h8, g6f8, g6e7, g6e5, g6h4, g6f4, h5h8, h5h7, h5h6, h5g5, h5f5, h5e5, h5d5, h5h4, h5g4, h5h3, h5f3, e2f4, e2c3, e2c1, g1f2, g1h1, g1f1, a1f1, a1e1, a1d1, a1c1, a1b1, g3g4, h2h3, c2c3, b2b3, a2a3, h2h4, c2c4, b2b4, a2a4\nmove: h5h8\npuzzle_id: YaaA9\nrating: 2341\nthemes: ['kingsideAttack', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1","sha256":"2ed65449ec3920a3e460970cdd8cf41929830213dd80c527f9487facd91ca025","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"bootstrap_random_search","source":"candidate_programs","num_iterations":19,"total_metric_calls":null,"num_full_val_evals":null,"best_iteration":15,"best_val_score":17.86},"whole_run_costs":{"jev":1.5714050940000033},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/jev-1-13/brs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 3r4/6kp/4p3/1p6/8/1BP4q/PP4Q1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: g7h8, g7f8, g7f7, g7h6, g7f6, h3g4, h3g3, h3g2\nmove: h3g2\n\nposition_fen: 3Qqk2/5p1p/b5pP/p2pP3/1r1r2P1/5R2/5PK1/8 w - - 2 39\nside_to_move: white\nlegal_moves_uci: d8e8, d8c8, d8b8, d8a8, d8e7, d8d7, d8c7, d8f6, d8d6, d8b6, d8g5, d8d5, d8a5, d8h4, f3f7, f3f6, f3f5, f3f4, f3h3, f3g3, f3e3, f3d3, f3c3, f3b3, f3a3, g2h3, g2g3, g2h2, g2h1, g2g1, e5e6, g4g5\nmove: f3f7\npuzzle_id: AF0Pt\nrating: 2103\nthemes: ['attraction', 'endgame', 'fork', 'mate', 'mateIn4', 'pin', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 2Q5/2Bp1p1p/4p3/p1kp4/Pn3P2/1P6/3KR2P/1q3r2 w - - 17 31\nside_to_move: white\nlegal_moves_uci: c8h8, c8g8, c8f8, c8e8, c8d8, c8b8, c8a8, c8d7, c8b7, c8a6, c7d8, c7b8, c7d6, c7b6, c7e5, c7a5, e2e6, e2e5, e2e4, e2e3, e2g2, e2f2, e2e1, d2e3, d2c3, f4f5, h2h3, h2h4\nmove: c8f8\npuzzle_id: EHyEK\nrating: 2595\nthemes: ['endgame', 'mate', 'mateIn4', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/1pR5/p5kp/6p1/b7/5P1P/r1nR2PK/8 w - - 2 36\nside_to_move: white\nlegal_moves_uci: c7c8, c7h7, c7g7, c7f7, c7e7, c7d7, c7b7, c7c6, c7c5, c7c4, c7c3, c7c2, h2g3, h2h1, h2g1, d2d8, d2d7, d2d6, d2d5, d2d4, d2d3, d2f2, d2e2, d2c2, d2d1, h3h4, f3f4, g2g3, g2g4\nmove: d2d6\npuzzle_id: tUyWO\nrating: 2735\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 0\n\nposition_fen: 3r2k1/6Rp/4p3/1p6/8/1BP4q/PP4b1/5QK1 b - - 0 29\nside_to_move: black\nlegal_moves_uci: g8h8, g8g7\nmove: g8g7\npuzzle_id: TGkEy\nrating: 2191\nthemes: ['crushing', 'endgame', 'pin', 'veryLong']\nposition_index: 2\n\nposition_fen: 5r1r/ppqb2Q1/2nkp3/3nN3/3P4/P1B5/1P3PPP/R4RK1 w - - 5 20\nside_to_move: white\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h7, g7f7, g7e7, g7d7, g7h6, g7g6, g7f6, g7g5, g7g4, g7g3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, c3a5, c3b4, c3d2, c3e1, g1h1, f1e1, f1d1, f1c1, f1b1, a1a2, a1e1, a1d1, a1c1, a1b1, a3a4, h2h3, g2g3, f2f3, b2b3, h2h4, g2g4, f2f4, b2b4\nmove: e5c4\npuzzle_id: uGdbu\nrating: 1795\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: r1bq1r2/pp1n1pp1/2pQ4/8/3R2Pk/8/PPP5/2K5 w - - 0 26\nside_to_move: white\nlegal_moves_uci: d6f8, d6b8, d6e7, d6d7, d6c7, d6h6, d6g6, d6f6, d6e6, d6c6, d6e5, d6d5, d6c5, d6f4, d6b4, d6g3, d6a3, d6h2, d4d5, d4f4, d4e4, d4c4, d4b4, d4a4, d4d3, d4d2, d4d1, c1d2, c1d1, c1b1, g4g5, c2c3, b2b3, a2a3, c2c4, b2b4, a2a4\nmove: d6h2\npuzzle_id: Exzx9\nrating: 2701\nthemes: ['mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: r3r1k1/3q1p1n/p6Q/2p1p3/3b2P1/4B1P1/PP3PK1/7R w - - 0 32\nside_to_move: white\nlegal_moves_uci: h6f8, h6h7, h6g7, h6g6, h6f6, h6e6, h6d6, h6c6, h6b6, h6a6, h6h5, h6g5, h6h4, h6f4, h6h3, h6h2, e3g5, e3f4, e3d4, e3d2, e3c1, g2h3, g2f3, g2h2, g2g1, g2f1, h1h5, h1h4, h1h3, h1h2, h1g1, h1f1, h1e1, h1d1, h1c1, h1b1, h1a1, g4g5, f2f3, b2b3, a2a3, f2f4, b2b4, a2a4\nmove: h6h7\npuzzle_id: wUTyK\nrating: 2707\nthemes: ['dovetailMate', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/p4bk1/5p1p/P4p2/B3pN2/P7/2P2PPP/1r1R2K1 b - - 3 25\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h7, f7g8, f7e8, f7g6, f7e6, f7h5, f7d5, f7c4, f7b3, f7a2, b1b8, b1b7, b1b6, b1b5, b1b4, b1b3, b1b2, b1d1, b1c1, b1a1, a7a6, h6h5, e4e3\nmove: b1d1\npuzzle_id: fXffx\nrating: 448\nthemes: ['backRankMate', 'endgame', 'mate', 'mateIn2', 'short']\nposition_index: 1\n\nposition_fen: 8/r2k4/8/PK3p2/8/8/8/R7 w - - 9 53\nside_to_move: white\nlegal_moves_uci: b5b6, b5c5, b5c4, b5b4, b5a4, a1a4, a1a3, a1a2, a1h1, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, a5a6\nmove: b5b6\npuzzle_id: szH7t\nrating: 2615\nthemes: ['clearance', 'crushing', 'defensiveMove', 'endgame', 'rookEndgame', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/8/8/7P/5p2/8/4K1kP/8 b - - 0 52\nside_to_move: black\nlegal_moves_uci: g2h3, g2h2, g2h1, g2g1, f4f3\nmove: f4f3\npuzzle_id: ulmPp\nrating: 2799\nthemes: ['advancedPawn', 'crushing', 'endgame', 'exposedKing', 'pawnEndgame', 'quietMove', 'veryLong', 'zugzwang']\nposition_index: 3\n\nposition_fen: rn1qkb1r/pp2pppp/2p2n2/3p1b2/3P1B2/3BP3/PPP2PPP/RN1QK1NR w KQkq - 0 5\nside_to_move: white\nlegal_moves_uci: f4b8, f4c7, f4h6, f4d6, f4g5, f4e5, f4g3, d3a6, d3f5, d3b5, d3e4, d3c4, d3e2, d3f1, g1h3, g1f3, g1e2, e1e2, e1d2, e1f1, d1h5, d1g4, d1f3, d1e2, d1d2, d1c1, b1c3, b1a3, b1d2, e3e4, h2h3, g2g3, f2f3, c2c3, b2b3, a2a3, h2h4, g2g4, c2c4, b2b4, a2a4\nmove: d3f5\npuzzle_id: c8OsF\nrating: 895\nthemes: ['advantage', 'hangingPiece', 'oneMove', 'opening']\nposition_index: 0\n\nposition_fen: r4rk1/pp2q1p1/3b3P/4n3/8/PP5Q/1BPN1P2/R4K1R b - - 0 23\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8f7, f8e8, f8d8, f8c8, f8b8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, a8e8, a8d8, a8c8, a8b8, e7e8, e7d8, e7f7, e7d7, e7c7, e7f6, e7e6, e7g5, e7h4, d6b8, d6c7, d6c5, d6b4, d6a3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, g7h6, g7g6, b7b6, a7a6, g7g5, b7b5, a7a5\nmove: f8f2\npuzzle_id: y7SzX\nrating: 2278\nthemes: ['advantage', 'attraction', 'discoveredAttack', 'discoveredCheck', 'fork', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: 2k4r/1p2bpp1/pP1p2p1/2pPP3/5P2/2N2QK1/1P4R1/R1B2q2 b - - 0 24\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, h8h1, c8d8, c8b8, c8d7, e7f8, e7d8, e7f6, e7g5, e7h4, f1b5, f1c4, f1f3, f1d3, f1g2, f1f2, f1e2, f1h1, f1g1, f1e1, f1d1, f1c1, d6e5, f7f6, g6g5, a6a5, c5c4, f7f5\nmove: h8h3\npuzzle_id: b4yqE\nrating: 2626\nthemes: ['attraction', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 0\n\nposition_fen: 5krr/ppQb4/3P4/5q2/7p/2P5/PP5p/K5R1 w - - 0 37\nside_to_move: white\nlegal_moves_uci: c7d8, c7c8, c7b8, c7d7, c7b7, c7c6, c7b6, c7c5, c7a5, c7c4, g1g8, g1g7, g1g6, g1g5, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, g1c1, g1b1, c3c4, b2b3, a2a3, b2b4, a2a4\nmove: c7d8\npuzzle_id: xAoXK\nrating: 2578\nthemes: ['exposedKing', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: r2r2k1/ppp2p1p/5p2/5Q2/8/5P2/PPP3PP/1K1R1B1R b - - 0 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8g7, d8f8, d8e8, d8c8, d8b8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, a8c8, a8b8, h7h6, c7c6, b7b6, a7a6, h7h5, c7c5, b7b5, a7a5\nmove: d8d1\npuzzle_id: 33foZ\nrating: 512\nthemes: ['backRankMate', 'endgame', 'hangingPiece', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0","sha256":"dd31cd071833358d8590cb1bfb6f374427d3327da13205fdedc5d5cf5da17ed3","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"bootstrap_random_search","source":"candidate_programs","num_iterations":19,"total_metric_calls":null,"num_full_val_evals":null,"best_iteration":13,"best_val_score":22.55},"whole_run_costs":{"jev":1.4709539039999988},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/jev-1-13/copro/42":{"text":"You are an elite chess engine operating at a Grandmaster level. Analyze the provided position to find the single absolute best move for the active player.\n\nApply a disciplined, chess-engine-like tree search:\n1. **Target Identification**: Scan the board for tactical features: loose pieces, weak back-ranks, alignment of pieces for forks/skewers, and king safety.\n2. **Candidate Selection**: List all immediate checks, captures, and threats (CCT).\n3. **Deep Line Calculation**: Calculate the lines for your primary candidate moves. For each candidate, identify the opponent's absolute best defense and calculate the continuation at least 3 plies deep (e.g., 1. Move, Response, 2. Follow-up).\n4. **Blunder/Refutation Check**: Specifically search for opponent counter-attacks, intermediate moves (zwischenzugs), or defensive resources.\n\nWrite out your calculation step-by-step and conclude with the single best move.","sha256":"0020245041da0297cdbd97bec44b240753774e0a6b7303f9448899daa376af14","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"copro","source":"copro_depth","num_iterations":3,"total_metric_calls":null,"num_full_val_evals":null,"best_iteration":1,"best_val_score":18.53},"whole_run_costs":{"prompt":0.5102145,"jev":1.6228592519999914},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/jev-1-13/copro/43":{"text":"You are an expert chess engine and grandmaster. Your task is to solve the chess puzzle by finding the single objectively best move for the side whose turn it is to play (as indicated in the position, typically provided in FEN format). \n\nTo find the correct move:\n1. Carefully analyze the piece positions, king safety, and material balance.\n2. Scan for tactical motifs such as forks, pins, skewers, uncovered attacks, deflections, promotion threats, or forced checkmate sequences.\n3. Calculate forcing candidate moves (checks, captures, and threats) and their logical continuations.\n4. Select the move that guarantees the maximum material advantage, a forced mate, or a theoretically won position.\n\nPresent your step-by-step reasoning or calculation, followed by the single best move in Standard Algebraic Notation (SAN, e.g., Nf3, Bxf7+, O-O) or UCI format (e.g., g1f3, e2e4).","sha256":"7f020f019abaece6c05fb9fd992ed320d7bee7ae536bab318c36ce78b6018419","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"copro","source":"copro_depth","num_iterations":3,"total_metric_calls":null,"num_full_val_evals":null,"best_iteration":0,"best_val_score":18.7},"whole_run_costs":{"prompt":0.8481224999999999,"jev":1.49081154600001},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/jev-1-13/copro/44":{"text":"You are an elite chess grandmaster and a state-of-the-art chess engine (equivalent to Stockfish). Your task is to analyze the given chess position (provided as a FEN string or game history) and determine the single absolute best move.\n\nTo guarantee perfect accuracy:\n1. **Determine the Active Side**: Parse the FEN carefully to identify which side is to move ('w' for White, 'b' for Black).\n2. **Prioritize Forcing Lines**: Calculate all checks, captures, and direct threats (CCT) to their logical conclusion.\n3. **Scan for Tactics**: Look for pins, forks, skewers, double attacks, deflection, or back-rank checkmate threats.\n4. **Select the Decisive Move**: Find the unique move that wins material, forces checkmate, or secures a theoretically won position.\n\nProvide only the single best move in Standard Algebraic Notation (SAN, e.g., \"Nf3\", \"Qxh7+\") or Universal Chess Interface format (UCI, e.g., \"e2e4\"). Do not include any reasoning, explanation, or extra commentary.","sha256":"a89f0b0fa8827403ae3c93561a80b422a65464e2816a31376db08f37fe86861f","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"copro","source":"copro_depth","num_iterations":3,"total_metric_calls":null,"num_full_val_evals":null,"best_iteration":1,"best_val_score":17.51},"whole_run_costs":{"prompt":0.5157224999999998,"jev":1.534384908000012},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/jev-1-13/gepa/42":{"text":"# Chess Puzzle Solver Instructions\n\nYour task is to solve a chess puzzle by identifying the single best, most forcing legal move for the specified side. Chess puzzles always have a concrete, decisive tactical solution (such as delivering checkmate, winning significant material, or escaping an otherwise lost position). Passive or quiet moves are rarely correct.\n\n---\n\n## Inputs\nYou will receive three inputs:\n1. **`position_fen`**: The board state in Forsyth-Edwards Notation (FEN).\n2. **`side_to_move`**: The player whose turn it is to move ('white' or 'black').\n3. **`legal_moves_uci`**: A comma-separated list of all legal moves for the current side, formatted in Universal Chess Interface (UCI) notation (e.g., `e2e4`, `d5d1`, `e5h2`).\n\n---\n\n## Step-by-Step Tactical Analysis Methodology\n\nTo find the correct move, you must systematically evaluate the board state. Avoid making quiet or slow developmental moves. Instead, execute the **Checks, Captures, and Threats (CCT)** heuristic:\n\n### Step 1: Scan for Immediate Checkmates and Direct Checks\n* **Mate in One:** Check if any legal move immediately delivers checkmate (e.g., Example 2: `e5h2` is an immediate Qxh2# mate).\n* **Forcing Checks:** Identify all moves that put the enemy king in check. Calculate the opponent's forced replies to these checks. \n  * Look for back-rank mate opportunities (e.g., Example 1: `d5d1` forces a back-rank mate after ...Qxd1+ Qxd1 Rxd1#).\n  * Look for tactical sacrifices that draw the king out or exploit pinned pieces (e.g., Example 3: `d3h3+` exploiting a pinned g2-pawn).\n\n### Step 2: Scan for Captures (Hanging & Underdefended Pieces)\n* Identify undefended (hanging) or insufficiently defended opponent pieces.\n* Look for tactical opportunities to win material through forks, skewers, pins, or discovered attacks.\n\n### Step 3: Scan for Strong Threats\n* If no immediate checks or captures work, look for moves that create overwhelming, unavoidable threats (e.g., threatening an unstoppable mate in one or a double attack on two high-value pieces).\n\n### Step 4: Calculate Opponent Replies\n* For your candidate moves, visualize the opponent's best possible defense. If your candidate move allows them an easy escape, discard it and evaluate the next candidate.\n\n### Step 5: Validate Legality\n* Ensure your final selected move is present in the `legal_moves_uci` list.\n\n---\n\n## Output Format\nOutput your final chosen move in UCI format matching the exact structure below:\n\n### move\n[insert_uci_move_here]","sha256":"e167d3e93aa71171e8d0b4dd2998e7fc1853781e1ab712f45e709e88864d4d5f","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"gepa","source":"gepa_detailed_results","num_iterations":10,"total_metric_calls":3599,"num_full_val_evals":10,"best_iteration":1,"best_val_score":0.1834319526627219},"whole_run_costs":{"jev":0.33451538399999875,"prompt":1.0960785},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/jev-1-13/gepa/43":{"text":"Solve the chess puzzle by finding the single best move (the winning tactical move) from the given position.\n\n### Input Formats\nYou will be provided with three inputs:\n1. **position_fen**: The current state of the board represented in Forsyth-Edwards Notation (FEN).\n2. **side_to_move**: The color ('white' or 'black') whose turn it is to make a move.\n3. **legal_moves_uci**: A list of all legal moves available for the active side, written in UCI format (e.g., `e2e4`, `g5h7`).\n\n### Objective\nIdentify the single, objectively best move from the `legal_moves_uci` list. This move must either force a checkmate, win decisive material, or save the game from an otherwise lost position.\n\n---\n\n### Step-by-Step Tactical Analysis Protocol (The Calculation Engine)\n\nTo prevent blunders (such as making non-forcing moves, choosing \"suicidal\" checks that immediately lose material, or picking minor captures over forced checkmates), you must perform a rigorous mental calculation using this step-by-step process:\n\n#### Step 1: Locate the Kings & Assess King Safety\n*   Find both kings on the board using the FEN.\n*   Analyze the opponent king's weaknesses: Is it exposed? Are there open files or diagonals leading to it? Is there a weak back rank?\n*   Analyze your own king's safety: Are there immediate mating threats you must defend against or out-calculate?\n\n#### Step 2: Generate and Filter Candidate Moves\nDo not just look at any legal move. Identify and group the most forcing moves from `legal_moves_uci`:\n1.  **Checks:** Identify *all* moves that put the opponent's king in check.\n2.  **Captures:** Identify all moves that capture an opponent's piece.\n3.  **Threats:** Identify moves that threaten mate in one, or pin/fork high-value pieces.\n\n#### Step 3: Deep Calculation (Min 3-Ply Depth)\nFor your top candidate moves, calculate the forced variations at least 3-ply deep:\n*   **Ply 1 (Your Move):** What is your forcing move (e.g., a check or sacrifice)?\n*   **Ply 2 (Opponent's Best Reply):** What is the opponent's absolute best defense? (Do they have a forcing capture, block, or king escape square?)\n*   **Ply 3 (Your Follow-up):** What is your winning follow-up? Does it lead to checkmate or clear material advantage?\n\n#### Step 4: Actively Reject Common Tactical Failures\nBefore selecting your final move, run these critical safety checks:\n*   **The \"Suicidal Check\" Check:** Is your check easily refuted by a simple capture that blunders your piece for nothing? (e.g., Do not play a check like `c7g7+` if the king or another piece can just take your rook for free, unless it leads to a forced mate).\n*   **The \"Mate Over Material\" Check:** Do not settle for capturing an undefended minor piece (e.g., `h1c1` taking a bishop) if there is a forced checkmate sequence available (e.g., `e7e1+` leading to mate).\n*   **The \"Quiet Move\" Check:** In sharp tactical positions, quiet moves or passive retreats (e.g., `e3c1` when your queen is active) are almost always losing. Prioritize direct, offensive actions.\n\n---\n\n### Output Format\nTo guarantee accuracy, you must structure your response with a **Thinking Process** section where you perform your calculations, followed by the final move. Use the following exact format:\n\n### Thinking Process\n1. **King Positions & Threats:** [Identify where both kings are and any immediate mating threats]\n2. **Candidate Moves:** [List 2-3 most forcing checks or captures from the legal moves list]\n3. **Calculation & Evaluation:**\n   * *Candidate 1 (e.g., e7e1):* Calculate 1... e7e1+ 2. Kf3 Rf1# (Result: Forced Mate)\n   * *Candidate 2 (e.g., h1c1):* Calculate 1... h1c1 2. Qxc1 (Result: Wins a bishop but misses mate)\n4. **Conclusion:** [Why the chosen move is the unique winner]\n\n### move\n[uci_move]","sha256":"f722ced20abdced68613762a36301440daea4988f68b5721ab609187efad00b2","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"gepa","source":"gepa_detailed_results","num_iterations":10,"total_metric_calls":3766,"num_full_val_evals":10,"best_iteration":9,"best_val_score":0.17857142857142858},"whole_run_costs":{"jev":0.3279524640000004,"prompt":0.6377714999999999},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/jev-1-13/gepa/44":{"text":"You are an expert chess engine and puzzle solver. Your task is to analyze a chess position and select the single best tactical move from the list of legal moves to solve the chess puzzle.\n\n### Inputs\n- **position_fen**: The current board state in Forsyth-Edwards Notation (FEN).\n- **side_to_move**: The color of the active player ('white' or 'black').\n- **legal_moves_uci**: A comma-separated list of all legal moves available to the active player in UCI (Universal Chess Interface) format (e.g., `e2e4`, `g1f3`, `e6d7`).\n\n### Tactical Decision-Making Hierarchy\nTo solve the puzzle successfully, you must evaluate the board state and scan the `legal_moves_uci` list using a strict, step-by-step tactical hierarchy. Do not select passive or slow positional moves if a forcing tactical move is available.\n\n1. **Scan for Immediate Checkmate (Mate-in-One):**\n   - Check if any move in the `legal_moves_uci` list immediately results in checkmate (e.g., delivering a mating rook or queen blow to the opponent's king, such as `f2h2` when the opponent's king is cornered). Always play the mating move first.\n\n2. **Address Direct Checks (King Safety):**\n   - If your king is currently in check, examine only the legal moves that resolve the check. Prioritize capturing the checking piece, blocking the check with a tactical threat, or escaping to a square that prepares a counter-attack (e.g., `f4g3` to capture a checking pawn).\n\n3. **Identify High-Value Captures & Forcing Checks:**\n   - Look for moves that capture valuable opponent pieces, especially undefended or hanging pieces (e.g., capturing an undefended queen, like `h3h1`).\n   - Look for forcing checks that force the opponent's king into a worse position, win material via a subsequent fork, or lead to a forced mating net.\n\n4. **Calculate Tactical Motifs & Opponent Replies:**\n   - If there is no immediate mate or high-value capture, look for tactical motifs: forks, pins, skewers, deflections, or promotion threats.\n   - For every candidate move, calculate the opponent's absolute best response. Ensure your chosen move guarantees a decisive material or positional advantage even against perfect defense.\n\n5. **Avoid Passive or Defensive Blunders:**\n   - Puzzle solutions are highly concrete and forcing. Avoid slow king adjustments, passive retreats (such as moving a rook away from an active attacking file, e.g., `f2f8`), or minor piece relocations that do not create an immediate threat.\n\n### Output Format\nProvide only the single best move from the `legal_moves_uci` list in the following format:\n\n```\nmove: <uci_move>\n```\n\nDo not include any explanation, chess notation commentary, or additional text.","sha256":"1c43fccabc68d53cb6b4b754afaa225a6027b339c4ccbd71128b2703fbfb83ea","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"gepa","source":"gepa_detailed_results","num_iterations":10,"total_metric_calls":3544,"num_full_val_evals":10,"best_iteration":6,"best_val_score":0.21068249258160238},"whole_run_costs":{"jev":0.2984587199999996,"prompt":0.9321210000000002},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/jev-1-13/miprov2/42":{"text":"You are an elite chess grandmaster and expert puzzle solver. Analyze the provided chess board position (in FEN) and the side to move. From the comma-separated list of legal UCI moves, identify and output the single best move that maximizes tactical advantage, material gain, or leads to a forced win. Your response must contain exactly one legal move chosen from the provided list, with absolutely no additional text, commentary, formatting, or explanation.\n\nposition_fen: 2r2b2/7k/1p2p1p1/3pPpPp/1PrR1P1P/2P5/3B1K2/2R5 b - - 0 36\nside_to_move: black\nlegal_moves_uci: f8g7, f8e7, f8h6, f8d6, f8c5, f8b4, c8e8, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, h7h8, h7g8, h7g7, c4c7, c4c6, c4c5, c4d4, c4b4, c4c3, b6b5\nmove: c4d4\n\nposition_fen: 2r2b2/7k/1p2p1p1/3pPpPp/1P1P1P1P/8/3B1K2/2R5 b - - 0 37\nside_to_move: black\nlegal_moves_uci: f8g7, f8e7, f8h6, f8d6, f8c5, f8b4, c8e8, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, c8c4, c8c3, c8c2, c8c1, h7h8, h7g8, h7g7, b6b5\nmove: c8c1\n\nposition_fen: 5b2/7k/1p2p1p1/3pPpPp/1P1P1P1P/8/5K2/2B5 b - - 0 38\nside_to_move: black\nlegal_moves_uci: f8g7, f8e7, f8h6, f8d6, f8c5, f8b4, h7h8, h7g8, h7g7, b6b5\nmove: f8b4\n\nposition_fen: 8/7k/1p2p1p1/3pPpPp/1b1P1P1P/8/4K3/2B5 b - - 1 39\nside_to_move: black\nlegal_moves_uci: h7h8, h7g8, h7g7, b4f8, b4e7, b4d6, b4c5, b4a5, b4c3, b4a3, b4d2, b4e1, b6b5\nmove: b4c3","sha256":"1f23d8b31b8bfe4c28e000df40e88183246f8104ac928fc37cf72b686e0b56ba","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"mipro_v2","source":"trial_logs","num_iterations":34,"total_metric_calls":0,"num_full_val_evals":null,"best_iteration":25,"best_val_score":25.71},"whole_run_costs":{"jev":0.3251246880000013,"prompt":0.5297204999999999},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/jev-1-13/miprov2/43":{"text":"You are an expert chess-solving engine. Your task is to analyze the current chess position provided in Forsyth-Edwards Notation (FEN) and determine the single best, most tactical, or winning move for the active side (\"white\" or \"black\"). \n\nTo do this:\n1. Carefully evaluate the board state, piece positions, and immediate threats or opportunities (e.g., checkmate sequences, winning material, tactical combinations, or strategic pawn advances).\n2. Choose the optimal move from the provided list of comma-separated legal moves in Universal Chess Interface (UCI) format.\n3. Output exactly one UCI move from the list. Do not include any explanations, reasoning, commentary, or extra characters in your response.\n\nposition_fen: 6k1/pp6/2p5/3p3p/3P2p1/P3P1PP/1P3K2/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: f2g2, f2e2, f2g1, f2f1, f2e1, h3g4, h3h4, e3e4, a3a4, b2b3, b2b4\nmove: h3g4\n\nposition_fen: 6k1/pp6/2p5/3p4/3P2p1/P3P1P1/1P3K2/8 w - - 0 34\nside_to_move: white\nlegal_moves_uci: f2g2, f2e2, f2g1, f2f1, f2e1, e3e4, a3a4, b2b3, b2b4\nmove: e3e4\n\nposition_fen: 8/3r1pkp/P5p1/2b1R3/2P1P3/8/2R3PP/7K b - - 1 43\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, g7f6, d7d8, d7e7, d7c7, d7b7, d7a7, d7d6, d7d5, d7d4, d7d3, d7d2, d7d1, c5f8, c5e7, c5a7, c5d6, c5b6, c5d4, c5b4, c5e3, c5a3, c5f2, c5g1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: d7d1\n\nposition_fen: 8/8/8/5p2/7P/8/4K1kP/8 b - - 0 51\nside_to_move: black\nlegal_moves_uci: g2h3, g2h2, g2h1, g2g1, f5f4\nmove: f5f4","sha256":"39bc761d107383f8276bca8c4ae3366154100069c94314620f2fc9c4b6cd7684","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"mipro_v2","source":"trial_logs","num_iterations":34,"total_metric_calls":0,"num_full_val_evals":null,"best_iteration":3,"best_val_score":22.86},"whole_run_costs":{"jev":0.35453720399999944,"prompt":0.5290094999999999},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/jev-1-13/miprov2/44":{"text":"You are competing in the final round of the World Chess Championship under extreme time pressure. The global title is on the line, and your next move will decide whether you win the tournament or lose everything. There is absolutely no margin for error. \n\nGiven the current board position (FEN), the side to move, and the list of available legal moves (in UCI format), identify the single absolute best tactical move that secures the win or saves the game.\n\nSelect your move directly from the provided list of legal moves. You must output **only** the selected move (e.g., \"g6g8\") and absolutely nothing else. Do not include any explanations, commentary, analysis, or formatting tags.\n\nposition_fen: r4r1k/1p4p1/2n4p/pN1B2n1/2P1p1Q1/P5P1/1PR2q2/3R2K1 w - - 0 25\nside_to_move: white\nlegal_moves_uci: g1h1, c2f2\nmove: c2f2\n\nposition_fen: 7k/ppp4p/8/4p3/4qr2/7P/1PP3R1/3Q3K w - - 2 31\nside_to_move: white\nlegal_moves_uci: h1h2, h1g1, d1d8, d1d7, d1d6, d1h5, d1d5, d1g4, d1d4, d1f3, d1d3, d1e2, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, h3h4, c2c3, b2b3, c2c4, b2b4\nmove: d1d8\n\nposition_fen: 6r1/kPQ1r2p/p4b2/6p1/3pp3/7P/5PP1/6K1 w - - 1 34\nside_to_move: white\nlegal_moves_uci: c7d8, c7c8, c7b8, c7e7, c7d7, c7d6, c7c6, c7b6, c7e5, c7c5, c7a5, c7f4, c7c4, c7g3, c7c3, c7h2, c7c2, c7c1, g1h2, g1h1, g1f1, b7b8q, b7b8r, b7b8b, b7b8n, h3h4, g2g3, f2f3, g2g4, f2f4\nmove: b7b8q\n\nposition_fen: r7/p1p3pk/7p/4b3/2PpPP2/7q/PPQ5/R4RK1 b - - 0 28\nside_to_move: black\nlegal_moves_uci: a8h8, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, h7h8, h7g8, h7g6, e5f6, e5d6, e5f4, h3c8, h3d7, h3e6, h3h5, h3f5, h3h4, h3g4, h3g3, h3f3, h3e3, h3d3, h3c3, h3b3, h3a3, h3h2, h3g2, h3h1, h3f1, g7g6, c7c6, a7a6, h6h5, d4d3, g7g5, c7c5, a7a5\nmove: e5f4\npuzzle_id: qcwPi\nrating: 2416\nthemes: ['advantage', 'attraction', 'fork', 'middlegame', 'veryLong']\nposition_index: 2","sha256":"e08f3b98cf8d9b83bab9de53d0b4a40a022abcdd4c2b75f06f54fb04479db330","unchanged":false,"condition_no_update":false,"trace":{"optimizer":"mipro_v2","source":"trial_logs","num_iterations":34,"total_metric_calls":0,"num_full_val_evals":null,"best_iteration":11,"best_val_score":28.57},"whole_run_costs":{"jev":0.36444277799999947,"prompt":0.6000735},"cost_gaps":["compile_only_cost_and_duration_not_separated_from_whole_run"]},"prompt/muse-spark-1-2-contributor/bfs/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 5b2/7k/1p2p1p1/3pPpPp/1P1P1P1P/8/5K2/2B5 b - - 0 38\nside_to_move: black\nlegal_moves_uci: f8g7, f8e7, f8h6, f8d6, f8c5, f8b4, h7h8, h7g8, h7g7, b6b5\nmove: f8b4\n\nposition_fen: R1Q2r1k/1p6/3P2p1/2P5/8/4qBP1/6KP/8 b - - 0 33\nside_to_move: black\nlegal_moves_uci: h8g8, h8h7, h8g7, f8g8, f8e8, f8d8, f8c8, e3e8, e3e7, e3h6, e3e6, e3g5, e3e5, e3c5, e3f4, e3e4, e3d4, e3f3, e3d3, e3c3, e3b3, e3a3, e3f2, e3e2, e3d2, e3g1, e3e1, e3c1, b7b6, g6g5, b7b5\nmove: e3f3\n\nposition_fen: 3r1r1k/pp2qppp/2p5/3bP1RP/8/1P2Q3/P1P2P2/1K4R1 w - - 2 26\nside_to_move: white\nlegal_moves_uci: g5g7, g5g6, g5f5, g5g4, g5g3, g5g2, e3a7, e3b6, e3c5, e3f4, e3e4, e3d4, e3h3, e3g3, e3f3, e3d3, e3c3, e3e2, e3d2, e3e1, e3c1, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, g1c1, b1b2, b1c1, b1a1, h5h6, e5e6, b3b4, f2f3, c2c3, a2a3, f2f4, c2c4, a2a4\nmove: g5g7\n\nposition_fen: r5rk/p1p2p1p/1p1p2qp/4p3/2P1R2b/3P2NP/P1P2PP1/1R1Q2K1 w - - 4 21\nside_to_move: white\nlegal_moves_uci: e4e5, e4h4, e4g4, e4f4, e4d4, e4e3, e4e2, e4e1, g3h5, g3f5, g3e2, g3h1, g3f1, g1h2, g1h1, g1f1, d1h5, d1g4, d1f3, d1e2, d1d2, d1f1, d1e1, d1c1, b1b6, b1b5, b1b4, b1b3, b1b2, b1c1, b1a1, c4c5, d3d4, f2f3, c2c3, a2a3, f2f4, a2a4\nmove: e4h4\n\nposition_fen: 7r/5k2/2p2b2/2p2P2/2P3K1/5RN1/7P/8 b - - 8 46\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, f7g8, f7f8, f7e8, f7g7, f7e7, f6d8, f6g7, f6e7, f6g5, f6e5, f6h4, f6d4, f6c3, f6b2, f6a1\nmove: h8h4\npuzzle_id: LPIS0\nrating: 2432\nthemes: ['endgame', 'long', 'mate', 'mateIn3', 'operaMate']\nposition_index: 2\n\nposition_fen: r6R/pq1k1p2/1p2b1p1/3P1pb1/6p1/BP1Q2P1/P1B2PK1/8 w - - 5 30\nside_to_move: white\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, h8h1, d3a6, d3f5, d3b5, d3e4, d3d4, d3c4, d3f3, d3e3, d3c3, d3e2, d3d2, d3f1, d3d1, a3f8, a3e7, a3d6, a3c5, a3b4, a3b2, a3c1, g2h2, g2h1, g2g1, g2f1, c2d1, c2b1, b3b4, f2f3, f2f4\nmove: d3b5\npuzzle_id: FZqMM\nrating: 2222\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 6k1/1p1P1p2/4p1p1/P1Rp3p/1P3P2/2Q3KP/6P1/3q2b1 b - - 2 34\nside_to_move: black\nlegal_moves_uci: g8f8, g8h7, g1c5, g1d4, g1e3, g1h2, g1f2, d1g4, d1d4, d1a4, d1f3, d1d3, d1b3, d1e2, d1d2, d1c2, d1f1, d1e1, d1c1, d1b1, d1a1, f7f6, b7b6, g6g5, e6e5, h5h4, d5d4, f7f5, b7b5\nmove: h5h4\npuzzle_id: tyHzQ\nrating: 2434\nthemes: ['attraction', 'endgame', 'fork', 'mate', 'mateIn5', 'veryLong']\nposition_index: 1\n\nposition_fen: 1r3r1k/5ppB/p7/6P1/1p1p1q1Q/6N1/PPP5/1K1b4 w - - 0 31\nside_to_move: white\nlegal_moves_uci: h7g8, h7g6, h7f5, h7e4, h7d3, h4h6, h4h5, h4g4, h4f4, h4h3, h4h2, h4h1, g3h5, g3f5, g3e4, g3e2, g3h1, g3f1, b1a1, g5g6, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: h4f4\npuzzle_id: 4dQTV\nrating: 2685\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: 3k4/7r/1b4B1/8/4pnP1/8/5R2/2R3K1 b - - 15 57\nside_to_move: black\nlegal_moves_uci: d8e7, d8d7, h7h8, h7g7, h7f7, h7e7, h7d7, h7c7, h7b7, h7a7, h7h6, h7h5, h7h4, h7h3, h7h2, h7h1, b6c7, b6a7, b6c5, b6a5, b6d4, b6e3, b6f2, f4g6, f4e6, f4h5, f4d5, f4h3, f4d3, f4g2, f4e2, e4e3\nmove: f4g6\npuzzle_id: 4WNM9\nrating: 2668\nthemes: ['crushing', 'endgame', 'exposedKing', 'master', 'pin', 'veryLong']\nposition_index: 1\n\nposition_fen: 5rk1/p4p2/3Q2p1/5q1p/6P1/5P1K/7P/4R2R b - - 0 35\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8g7, f8e8, f8d8, f8c8, f8b8, f8a8, f5c8, f5d7, f5f6, f5e6, f5g5, f5e5, f5d5, f5c5, f5b5, f5a5, f5g4, f5f4, f5e4, f5f3, f5d3, f5c2, f5b1, h5g4, f7f6, a7a6, g6g5, h5h4, a7a5\nmove: f5f3\npuzzle_id: 6ziXy\nrating: 2213\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: r7/5k2/pp1p1ppp/2pP4/2P2q2/2PB3Q/P1K5/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h3c8, h3d7, h3h6, h3e6, h3h5, h3f5, h3h4, h3g4, h3g3, h3f3, h3e3, h3h2, h3g2, h3h1, h3f1, d3g6, d3f5, d3e4, d3e2, d3f1, c2b3, c2b2, c2d1, c2b1, a2a3, a2a4\nmove: h3d7\npuzzle_id: 5nfOl\nrating: 2156\nthemes: ['attraction', 'crushing', 'deflection', 'endgame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 4r1k1/rp3ppp/p7/P2N4/3P1q2/QP1np2P/2R2PP1/1N3K1R b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, a7a8, f4b8, f4c7, f4h6, f4f6, f4d6, f4g5, f4f5, f4e5, f4h4, f4g4, f4e4, f4d4, f4g3, f4f3, f4h2, f4f2, d3e5, d3c5, d3b4, d3f2, d3b2, d3e1, d3c1, e3f2, h7h6, g7g6, f7f6, b7b6, e3e2, h7h5, g7g5, f7f5, b7b5\nmove: e3e2\npuzzle_id: 3Mg46\nrating: 2418\nthemes: ['advancedPawn', 'long', 'master', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 0\n\nposition_fen: 5rk1/3Q4/2p5/3p4/6p1/1P2r2q/P6p/2RK2R1 w - - 0 36\nside_to_move: white\nlegal_moves_uci: d7e8, d7d8, d7c8, d7h7, d7g7, d7f7, d7e7, d7c7, d7b7, d7a7, d7e6, d7d6, d7c6, d7f5, d7d5, d7g4, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, d1d2, d1c2, c1c6, c1c5, c1c4, c1c3, c1c2, c1b1, c1a1, b3b4, a2a3, a2a4\nmove: g1g4\npuzzle_id: CNFx5\nrating: 1127\nthemes: ['crushing', 'endgame', 'short']\nposition_index: 0\n\nposition_fen: r4r2/5p1k/p2p4/q3nN2/1p4Q1/8/PPP5/2K2nN1 w - - 2 29\nside_to_move: white\nlegal_moves_uci: f5g7, f5e7, f5h6, f5d6, f5h4, f5d4, f5g3, f5e3, g4g8, g4g7, g4g6, g4h5, g4g5, g4h4, g4f4, g4e4, g4d4, g4c4, g4b4, g4h3, g4g3, g4f3, g4g2, g4e2, g4d1, g1h3, g1f3, g1e2, c1d1, c1b1, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: g4g7\npuzzle_id: GJCXh\nrating: 2676\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'veryLong']\nposition_index: 4\n\nposition_fen: r2r2kb/pp2pp1p/2q2npB/4p3/8/2N5/PPPQ1PPP/3R1RK1 w - - 0 15\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, h6g5, h6f4, h6e3, c3d5, c3b5, c3e4, c3a4, c3e2, c3b1, d2d8, d2d7, d2d6, d2g5, d2d5, d2f4, d2d4, d2e3, d2d3, d2e2, d2e1, d2c1, g1h1, f1e1, d1e1, d1c1, d1b1, d1a1, h2h3, g2g3, f2f3, b2b3, a2a3, h2h4, g2g4, f2f4, b2b4, a2a4\nmove: d2d8\npuzzle_id: XLka2\nrating: 640\nthemes: ['crushing', 'kingsideAttack', 'middlegame', 'short']\nposition_index: 0","sha256":"62022ef9d02f6e6fdc36bffec19a997dec3614cc4465e71d60b89c6d7181f441","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/bfs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 6k1/pp6/2p5/3p3p/3P2p1/P3P1PP/1P3K2/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: f2g2, f2e2, f2g1, f2f1, f2e1, h3g4, h3h4, e3e4, a3a4, b2b3, b2b4\nmove: h3g4\n\nposition_fen: 6k1/pp6/2p5/3p4/3P2p1/P3P1P1/1P3K2/8 w - - 0 34\nside_to_move: white\nlegal_moves_uci: f2g2, f2e2, f2g1, f2f1, f2e1, e3e4, a3a4, b2b3, b2b4\nmove: e3e4\n\nposition_fen: 8/3r1pkp/P5p1/2b1R3/2P1P3/8/2R3PP/7K b - - 1 43\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, g7f6, d7d8, d7e7, d7c7, d7b7, d7a7, d7d6, d7d5, d7d4, d7d3, d7d2, d7d1, c5f8, c5e7, c5a7, c5d6, c5b6, c5d4, c5b4, c5e3, c5a3, c5f2, c5g1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: d7d1\n\nposition_fen: 8/8/8/5p2/7P/8/4K1kP/8 b - - 0 51\nside_to_move: black\nlegal_moves_uci: g2h3, g2h2, g2h1, g2g1, f5f4\nmove: f5f4\n\nposition_fen: 3r4/5k2/8/1p2PKp1/pP1N2P1/6p1/1P4P1/8 w - - 4 33\nside_to_move: white\nlegal_moves_uci: f5g5, f5e4, d4e6, d4c6, d4b5, d4f3, d4b3, d4e2, d4c2, e5e6, b2b3\nmove: e5e6\npuzzle_id: 5eBes\nrating: 2381\nthemes: ['crushing', 'endgame', 'veryLong', 'zugzwang']\nposition_index: 0\n\nposition_fen: 5rkr/pp2q1p1/4n1Q1/3nPR1p/4N3/8/PP4PP/5R1K w - - 8 24\nside_to_move: white\nlegal_moves_uci: g6e8, g6h7, g6g7, g6f7, g6h6, g6f6, g6e6, g6h5, g6g5, g6g4, g6g3, f5f8, f5f7, f5f6, f5h5, f5g5, f5f4, f5f3, f5f2, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h1g1, f1f4, f1f3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: g6e6\npuzzle_id: 4uOji\nrating: 2195\nthemes: ['crushing', 'deflection', 'fork', 'master', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: Rn4k1/6pp/3p4/1B1Pq3/1PN1n3/7P/2P2RK1/3Q4 b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e5e8, e5e7, e5f6, e5e6, e5h5, e5g5, e5f5, e5d5, e5f4, e5d4, e5g3, e5c3, e5h2, e5b2, e5a1, e4f6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h7h6, g7g6, h7h5, g7g5\nmove: e5g3\npuzzle_id: u5Z6U\nrating: 2563\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: 8/6nk/p3p2p/1b1pNp1N/1b1P1P1P/4q3/6PK/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h5g7, h5f6, h5g3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, h2h1, g2g3, g2g4\nmove: h5f6\npuzzle_id: saT5n\nrating: 2740\nthemes: ['long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 7r/5pk1/3p1P2/1p4q1/3p4/PQ1B4/1P3p2/5K1R b - - 0 46\nside_to_move: black\nlegal_moves_uci: g7g8, g7f8, g7f6, g5f6\nmove: g7f6\npuzzle_id: xAiWS\nrating: 2314\nthemes: ['advantage', 'endgame', 'exposedKing', 'long', 'skewer']\nposition_index: 0\n\nposition_fen: 7k/p5pp/3p4/2p1p3/2P3q1/1PQ2rP1/P4n1P/2B1KR2 w - - 0 28\nside_to_move: white\nlegal_moves_uci: c3e5, c3a5, c3d4, c3b4, c3f3, c3e3, c3d3, c3d2, c3c2, c3b2, c3a1, f1f2, f1h1, f1g1, e1e2, e1d2, c1h6, c1g5, c1f4, c1e3, c1a3, c1d2, c1b2, b3b4, h2h3, a2a3, h2h4, a2a4\nmove: f1f2\npuzzle_id: KXgrS\nrating: 2165\nthemes: ['advantage', 'long', 'middlegame']\nposition_index: 2\n\nposition_fen: 6n1/1p4Pk/2p1N2P/p5K1/8/8/8/8 w - - 1 53\nside_to_move: white\nlegal_moves_uci: e6f8, e6d8, e6c7, e6c5, e6f4, e6d4, g5h5, g5f5, g5h4, g5g4, g5f4\nmove: e6f8\npuzzle_id: mZF9a\nrating: 513\nthemes: ['endgame', 'knightEndgame', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0\n\nposition_fen: 4rr2/p7/1p3k1p/2p1Rp2/6p1/P7/1P3PPP/4RK2 w - - 5 26\nside_to_move: white\nlegal_moves_uci: e5e8, e5e7, e5e6, e5f5, e5d5, e5c5, e5e4, e5e3, e5e2, f1e2, f1g1, e1e4, e1e3, e1e2, e1d1, e1c1, e1b1, e1a1, a3a4, h2h3, g2g3, f2f3, b2b3, h2h4, f2f4, b2b4\nmove: e5e8\npuzzle_id: vOxk6\nrating: 939\nthemes: ['crushing', 'endgame', 'rookEndgame', 'short']\nposition_index: 0\n\nposition_fen: 1r5k/p5p1/6Pp/Q6P/8/8/P4P2/KR1r4 b - - 2 40\nside_to_move: black\nlegal_moves_uci: h8g8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1h1, d1g1, d1f1, d1e1, d1c1, d1b1, a7a6\nmove: d1b1\npuzzle_id: TMIoF\nrating: 1117\nthemes: ['endgame', 'mate', 'mateIn2', 'queenRookEndgame', 'short']\nposition_index: 1\n\nposition_fen: 1R6/4k3/7r/2p3K1/4p3/8/8/8 w - - 0 53\nside_to_move: white\nlegal_moves_uci: b8h8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, g5h6, g5f5, g5g4, g5f4\nmove: g5h6\npuzzle_id: 0ErLd\nrating: 2296\nthemes: ['crushing', 'endgame', 'exposedKing', 'rookEndgame', 'veryLong']\nposition_index: 3\n\nposition_fen: Q2qkb1r/p2bpppp/8/1B1P4/4nB2/4PK2/PP1p1PPP/n5NR w k - 1 16\nside_to_move: white\nlegal_moves_uci: a8d8, a8c8, a8b8, a8b7, a8a7, a8c6, b5d7, b5c6, b5a6, b5c4, b5a4, b5d3, b5e2, b5f1, f4b8, f4c7, f4h6, f4d6, f4g5, f4e5, f4g3, f3e4, f3e2, g1h3, g1e2, d5d6, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: b5d7\npuzzle_id: lQxX8\nrating: 2532\nthemes: ['attraction', 'clearance', 'fork', 'mate', 'mateIn5', 'middlegame', 'pin', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: 1k6/1P6/1K6/6B1/6P1/8/8/4q3 w - - 0 56\nside_to_move: white\nlegal_moves_uci: b6c6, b6a6, b6c5, b6b5, g5d8, g5e7, g5h6, g5f6, g5h4, g5f4, g5e3, g5d2, g5c1\nmove: g5f4\npuzzle_id: Nx8za\nrating: 836\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 0","sha256":"599504db855e2ea54d1ceae8d7c86dc323839f539d1a1e763638ecf519c7dc24","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/bfs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 6k1/5pp1/p3p2p/8/4n3/1BP5/PP2KPP1/4R2q w - - 0 35\nside_to_move: white\nlegal_moves_uci: b3e6, b3d5, b3c4, b3a4, b3c2, b3d1, e2f3, e2e3, e2d3, e2d1, e1h1, e1g1, e1f1, e1d1, e1c1, e1b1, e1a1, c3c4, g2g3, f2f3, a2a3, g2g4, f2f4, a2a4\nmove: e1h1\n\nposition_fen: 2k4r/ppp2p2/3bpq2/8/3P4/2P2Q2/PP3P1p/4RR1K b - - 0 24\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, h8h4, h8h3, c8d8, c8b8, c8d7, f6d8, f6g7, f6e7, f6h6, f6g6, f6g5, f6f5, f6e5, f6h4, f6f4, f6d4, f6f3, d6f8, d6e7, d6e5, d6c5, d6f4, d6b4, d6g3, d6a3, c7c6, b7b6, a7a6, e6e5, c7c5, b7b5, a7a5\nmove: f6f3\n\nposition_fen: 3r4/1p1q2k1/p3n1p1/4Pp1Q/3p4/P6P/1P1r4/6RK w - - 0 47\nside_to_move: white\nlegal_moves_uci: h5h8, h5h7, h5h6, h5g6, h5g5, h5f5, h5h4, h5g4, h5f3, h5e2, h5d1, g1g6, g1g5, g1g4, g1g3, g1g2, g1f1, g1e1, g1d1, g1c1, g1b1, g1a1, h3h4, a3a4, b2b3, b2b4\nmove: g1g6\n\nposition_fen: 3r3Q/1p1qk3/p3n1R1/4Pp2/3p4/P6P/1P1r4/7K w - - 3 49\nside_to_move: white\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8g7, h8h6, h8f6, h8h5, h8h4, g6g8, g6g7, g6h6, g6f6, g6e6, g6g5, g6g4, g6g3, g6g2, g6g1, h1g1, h3h4, a3a4, b2b3, b2b4\nmove: h8f6\n\nposition_fen: r3r1k1/1p1qbppp/p1n5/2pp1N2/6N1/2PP3P/PP3PP1/R2QR1K1 b - - 6 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, a8d8, a8c8, a8b8, a8a7, e7f8, e7d8, e7f6, e7d6, e7g5, e7h4, d7d8, d7c8, d7c7, d7e6, d7d6, d7f5, c6d8, c6b8, c6a7, c6e5, c6a5, c6d4, c6b4, h7h6, g7g6, f7f6, b7b6, a6a5, d5d4, c5c4, h7h5, g7g5, b7b5\nmove: d7f5\npuzzle_id: DmJlo\nrating: 792\nthemes: ['advantage', 'hangingPiece', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: 3r1rk1/4R2p/p4bp1/1p3p2/4QPP1/8/P4q1P/3R3K w - - 0 29\nside_to_move: white\nlegal_moves_uci: e7e8, e7h7, e7g7, e7f7, e7d7, e7c7, e7b7, e7a7, e7e6, e7e5, e4a8, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4d4, e4c4, e4b4, e4a4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, e4b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, g4f5, g4g5, h2h3, a2a3, h2h4, a2a4\nmove: e4e6\npuzzle_id: 0PhbW\nrating: 2606\nthemes: ['deflection', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 7k/3n2p1/4Q2p/3p2N1/8/3q4/1P3KPP/r3B3 w - - 0 29\nside_to_move: white\nlegal_moves_uci: e6g8, e6e8, e6f7, e6e7, e6d7, e6h6, e6g6, e6f6, e6d6, e6c6, e6b6, e6a6, e6f5, e6e5, e6d5, e6g4, e6e4, e6h3, e6e3, e6e2, g5h7, g5f7, g5e4, g5h3, g5f3, f2g1, e1a5, e1b4, e1c3, e1d2, h2h3, g2g3, b2b3, h2h4, g2g4, b2b4\nmove: e6e8\npuzzle_id: vyvus\nrating: 1408\nthemes: ['endgame', 'fork', 'mate', 'mateIn2', 'short']\nposition_index: 0\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb2k/2p4P/8/2P2Q2/PP1P1PP1/RNB1K2R w KQ - 1 13\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1h4, h1h3, h1h2, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, g2g3, d2d3, b2b3, a2a3, g2g4, d2d4, b2b4, a2a4\nmove: f3e3\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 2\n\nposition_fen: 4k3/2p3R1/2p1PK2/5r2/p2P4/r7/8/B7 w - - 0 47\nside_to_move: white\nlegal_moves_uci: f6g6, f6f5\nmove: f6f5\npuzzle_id: 52eVA\nrating: 2338\nthemes: ['crushing', 'defensiveMove', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: 1r4RQ/p5r1/2n1pk1p/5p1q/2PP4/5P2/P4P1P/R6K w - - 6 31\nside_to_move: white\nlegal_moves_uci: h8h7, h8g7, h8h6, g8f8, g8e8, g8d8, g8c8, g8b8, g8g7, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, d4d5, c4c5, f3f4, h2h3, a2a3, h2h4, a2a4\nmove: h8g7\npuzzle_id: C9c6a\nrating: 2054\nthemes: ['discoveredAttack', 'discoveredCheck', 'exposedKing', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: rn3rk1/4b2p/6pB/pp1p2N1/8/P5nP/1P3PP1/R3R1K1 w - - 0 29\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, g5h7, g5f7, g5e6, g5e4, g5f3, g1h2, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, a1a2, a1d1, a1c1, a1b1, f2g3, h3h4, a3a4, f2f3, b2b3, f2f4, b2b4\nmove: e1e7\npuzzle_id: mPgSs\nrating: 2619\nthemes: ['crushing', 'discoveredAttack', 'discoveredCheck', 'kingsideAttack', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: r4rk1/ppp2pq1/3p2p1/3Np1n1/3nP1pQ/8/PPP2P2/1K3B1R w - - 4 19\nside_to_move: white\nlegal_moves_uci: d5e7, d5c7, d5f6, d5b6, d5f4, d5b4, d5e3, d5c3, h4h8, h4h7, h4h6, h4h5, h4g5, h4g4, h4h3, h4g3, h4h2, h1h3, h1h2, h1g1, f1a6, f1b5, f1c4, f1h3, f1d3, f1g2, f1e2, b1c1, b1a1, f2f3, c2c3, b2b3, a2a3, f2f4, c2c4, b2b4, a2a4\nmove: d5e7\npuzzle_id: m17EB\nrating: 1277\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 8/5pkp/2BR2p1/1pP1p3/1P5q/3QP2P/5P1K/r7 b - - 0 32\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, h4d8, h4e7, h4h6, h4f6, h4h5, h4g5, h4g4, h4f4, h4e4, h4d4, h4c4, h4b4, h4h3, h4g3, h4f2, a1a8, a1a7, a1a6, a1a5, a1a4, a1a3, a1a2, a1h1, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, h7h6, f7f6, g6g5, e5e4, h7h5, f7f5\nmove: h4f2\npuzzle_id: HNck2\nrating: 2516\nthemes: ['advantage', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb3/2p3k1/8/2P2Q2/PP1P1PPP/RNB1K2R w KQ - 0 11\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3h5, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, h2h3, g2g3, d2d3, b2b3, a2a3, h2h4, g2g4, d2d4, b2b4, a2a4\nmove: h2h4\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 0\n\nposition_fen: r5k1/3n1pbp/6p1/8/3Bq3/1P5P/P1RQ2P1/1K5R b - - 3 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, a8a6, a8a5, a8a4, a8a3, a8a2, g7h8, g7f8, g7h6, g7f6, g7e5, g7d4, d7f8, d7b8, d7f6, d7b6, d7e5, d7c5, e4e8, e4e7, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4h4, e4g4, e4f4, e4d4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: g7d4\npuzzle_id: uHEok\nrating: 1301\nthemes: ['crushing', 'discoveredAttack', 'middlegame', 'short']\nposition_index: 1","sha256":"5adfa58545c9ecffcbc5fb07862577c108d12db79b590765ce0147f1860be3a9","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/brs/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 1k1B3r/5p2/1p4P1/1N6/Pp1pB1qp/8/5K2/R2Q1R2 b - - 0 30\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, b8c8, g4c8, g4d7, g4g6, g4e6, g4h5, g4g5, g4f5, g4f4, g4e4, g4h3, g4g3, g4f3, g4g2, g4e2, g4g1, g4d1, f7g6, f7f6, h4h3, d4d3, b4b3, f7f5\nmove: g4g3\n\nposition_fen: 8/3k4/K4p2/1P2p1p1/p1n1P1P1/6P1/5B2/8 b - - 2 64\nside_to_move: black\nlegal_moves_uci: d7e8, d7d8, d7c8, d7e7, d7c7, d7e6, d7d6, c4d6, c4b6, c4a5, c4e3, c4a3, c4d2, c4b2, f6f5, a4a3\nmove: a4a3\n\nposition_fen: 6k1/p5p1/2p3Qp/8/3B2PK/2P2r2/PP2r2R/R7 b - - 1 34\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, f3f8, f3f7, f3f6, f3f5, f3f4, f3h3, f3g3, f3e3, f3d3, f3c3, f3f2, f3f1, e2e8, e2e7, e2e6, e2e5, e2e4, e2e3, e2h2, e2g2, e2f2, e2d2, e2c2, e2b2, e2e1, a7a6, h6h5, c6c5, a7a5\nmove: e2h2\npuzzle_id: XGwZ5\nrating: 2639\nthemes: ['deflection', 'discoveredAttack', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 2\n\nposition_fen: r3r2k/2q3p1/pp3NQp/1n3p2/1P6/3P2RP/4nPP1/3R2K1 w - - 4 33\nside_to_move: white\nlegal_moves_uci: g1h2, g1h1, g1f1\nmove: g1h2\npuzzle_id: EWmia\nrating: 2438\nthemes: ['advantage', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 4k3/2p3R1/2p1PK2/5r2/p2P4/r7/8/B7 w - - 0 47\nside_to_move: white\nlegal_moves_uci: f6g6, f6f5\nmove: f6f5\npuzzle_id: 52eVA\nrating: 2338\nthemes: ['crushing', 'defensiveMove', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: R3r1k1/8/1p4K1/1Pp2P2/3n4/8/8/8 w - - 2 61\nside_to_move: white\nlegal_moves_uci: a8e8, a8d8, a8c8, a8b8, a8a7, a8a6, a8a5, a8a4, a8a3, a8a2, a8a1, g6h6, g6f6, g6h5, g6g5, f5f6\nmove: a8e8\npuzzle_id: aEO4c\nrating: 1401\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 1\n\nposition_fen: rn2r1k1/p1b2ppp/2p2n2/2Np4/1P6/P2P1B1P/3B1PPq/R2QRK2 b - - 2 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, b8d7, b8a6, c7d8, c7d6, c7b6, c7e5, c7a5, c7f4, c7g3, f6d7, f6h5, f6g4, f6e4, h2d6, h2e5, h2f4, h2h3, h2g3, h2g2, h2h1, h2g1, h7h6, g7g6, a7a6, d5d4, h7h5, g7g5, a7a5\nmove: h2h1\npuzzle_id: 6zFvF\nrating: 984\nthemes: ['kingsideAttack', 'mate', 'mateIn2', 'opening', 'short']\nposition_index: 1\n\nposition_fen: r4r2/pppnbk2/8/3pp1B1/4P2Q/5q2/PPP2P2/RN2K3 w Q - 0 22\nside_to_move: white\nlegal_moves_uci: g5e7, g5h6, g5f6, g5f4, g5e3, g5d2, g5c1, h4h8, h4h7, h4h6, h4h5, h4g4, h4f4, h4h3, h4g3, h4h2, h4h1, e1d2, e1f1, b1c3, b1a3, b1d2, e4d5, c2c3, b2b3, a2a3, c2c4, b2b4, a2a4\nmove: h4h7\npuzzle_id: uDWXg\nrating: 2341\nthemes: ['exposedKing', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 5rk1/1b2bppp/ppr1p3/3qB3/3P2Q1/4P1nP/PP4PN/1B1R1RK1 b - - 4 22\nside_to_move: black\nlegal_moves_uci: g8h8, f8e8, f8d8, f8c8, f8b8, f8a8, e7d8, e7f6, e7d6, e7g5, e7c5, e7h4, e7b4, e7a3, b7c8, b7a8, c6c8, c6c7, c6d6, c6c5, c6c4, c6c3, c6c2, c6c1, d5d8, d5d7, d5d6, d5e5, d5c5, d5b5, d5a5, d5e4, d5d4, d5c4, d5f3, d5b3, d5g2, d5a2, g3h5, g3f5, g3e4, g3e2, g3h1, g3f1, h7h6, g7g6, f7f6, b6b5, a6a5, h7h5, g7g5, f7f5\nmove: d5g2\npuzzle_id: 5OnYn\nrating: 2183\nthemes: ['attraction', 'discoveredCheck', 'doubleCheck', 'kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: 2r4k/pp1b4/3R1p1p/8/3NP3/1Q3P2/PP3nqP/1KR5 b - - 3 27\nside_to_move: black\nlegal_moves_uci: h8h7, h8g7, c8g8, c8f8, c8e8, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, c8c4, c8c3, c8c2, c8c1, d7e8, d7e6, d7c6, d7f5, d7b5, d7g4, d7a4, d7h3, g2g8, g2g7, g2g6, g2g5, g2g4, g2h3, g2g3, g2f3, g2h2, g2h1, g2g1, g2f1, f2g4, f2e4, f2h3, f2d3, f2h1, f2d1, b7b6, a7a6, h6h5, f6f5, b7b5, a7a5\nmove: c8c1\npuzzle_id: uyEMf\nrating: 2599\nthemes: ['advantage', 'attraction', 'fork', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: k1r5/pp2Q3/r7/3p4/P2PpNP1/KP2P3/2q2P2/3R3R b - - 3 40\nside_to_move: black\nlegal_moves_uci: c8h8, c8g8, c8f8, c8e8, c8d8, c8b8, c8c7, c8c6, c8c5, c8c4, c8c3, a8b8, a6h6, a6g6, a6f6, a6e6, a6d6, a6c6, a6b6, a6a5, a6a4, c2c7, c2c6, c2c5, c2c4, c2d3, c2c3, c2b3, c2f2, c2e2, c2d2, c2b2, c2a2, c2d1, c2c1, c2b1, b7b6, b7b5\nmove: b7b5\npuzzle_id: wonMd\nrating: 2200\nthemes: ['advantage', 'exposedKing', 'middlegame', 'pin', 'veryLong']\nposition_index: 2\n\nposition_fen: 2k3r1/ppp1p3/7p/8/4PB2/5N2/PK4RP/8 b - - 0 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8e8, g8d8, g8g7, g8g6, g8g5, g8g4, g8g3, g8g2, c8d8, c8b8, c8d7, e7e6, c7c6, b7b6, a7a6, h6h5, e7e5, c7c5, b7b5, a7a5\nmove: g8g2\npuzzle_id: JUEhk\nrating: 513\nthemes: ['advantage', 'endgame', 'hangingPiece', 'oneMove']\nposition_index: 0\n\nposition_fen: 2Q5/3n1ppp/4k3/8/1P6/7P/6PK/4q3 w - - 0 42\nside_to_move: white\nlegal_moves_uci: c8h8, c8g8, c8f8, c8e8, c8d8, c8b8, c8a8, c8d7, c8c7, c8b7, c8c6, c8a6, c8c5, c8c4, c8c3, c8c2, c8c1, b4b5, h3h4, g2g3, g2g4\nmove: c8e8\npuzzle_id: uVlY9\nrating: 2723\nthemes: ['crushing', 'endgame', 'skewer', 'veryLong']\nposition_index: 3\n\nposition_fen: Qn1qk2r/p1p3pp/4pn2/4p3/1b6/2N5/PPp1NPPP/R1B1K2R b KQk - 2 11\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, e8f8, e8f7, e8e7, e8d7, d8c8, d8e7, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, b8d7, b8c6, b8a6, f6g8, f6d7, f6h5, f6d5, f6g4, f6e4, b4f8, b4e7, b4d6, b4c5, b4a5, b4c3, b4a3, e8g8, h7h6, g7g6, c7c6, a7a6, e5e4, h7h5, g7g5, c7c5, a7a5\nmove: d8d1\npuzzle_id: fxUFR\nrating: 1802\nthemes: ['mate', 'mateIn1', 'oneMove', 'opening', 'pin']\nposition_index: 0\n\nposition_fen: 1k2r1r1/1p5p/pP3b2/6p1/3pp3/7P/2Q2PP1/4R1K1 w - - 2 30\nside_to_move: white\nlegal_moves_uci: c2c8, c2c7, c2c6, c2c5, c2e4, c2c4, c2a4, c2d3, c2c3, c2b3, c2e2, c2d2, c2b2, c2a2, c2d1, c2c1, c2b1, g1h2, g1h1, g1f1, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, e1a1, h3h4, g2g3, f2f3, g2g4, f2f4\nmove: c2c7\npuzzle_id: DIC2c\nrating: 2083\nthemes: ['advancedPawn', 'discoveredCheck', 'doubleCheck', 'endgame', 'mate', 'mateIn5', 'promotion', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: r6r/1pp2kp1/p4Pp1/3P4/3Q4/2N2R2/PPP4q/4RK2 b - - 1 23\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8h7, h8h6, h8h5, h8h4, h8h3, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, f7g8, f7f8, h2h7, h2h6, h2d6, h2h5, h2e5, h2h4, h2f4, h2h3, h2g3, h2g2, h2f2, h2e2, h2d2, h2c2, h2h1, h2g1, g7f6, c7c6, b7b6, g6g5, a6a5, c7c5, b7b5\nmove: h2h1\npuzzle_id: dJaOf\nrating: 2294\nthemes: ['advantage', 'deflection', 'discoveredAttack', 'fork', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 2","sha256":"1f44c5fdca32ebb910ea982e2975aaa7821184974fa61d0c6cc21ccaadff7f10","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/brs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 7k/2p3r1/2p2N1p/3p1P2/p1qP4/3b4/6PP/4R1K1 w - - 2 32\nside_to_move: white\nlegal_moves_uci: f6g8, f6e8, f6h7, f6d7, f6h5, f6d5, f6g4, f6e4, g1f2, g1h1, e1e8, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, e1a1, h2h3, g2g3, h2h4, g2g4\nmove: e1e8\n\nposition_fen: r6r/1pp2kp1/p4Pp1/3P4/3Q4/2N2R2/PPP4q/4RK2 b - - 1 23\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8h7, h8h6, h8h5, h8h4, h8h3, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, f7g8, f7f8, h2h7, h2h6, h2d6, h2h5, h2e5, h2h4, h2f4, h2h3, h2g3, h2g2, h2f2, h2e2, h2d2, h2c2, h2h1, h2g1, g7f6, c7c6, b7b6, g6g5, a6a5, c7c5, b7b5\nmove: h2h1\n\nposition_fen: 5rk1/pp4p1/2p3Q1/3p2Pp/1P1Pn1qP/P3P3/2R2B1K/6R1 b - - 0 34\nside_to_move: black\nlegal_moves_uci: g8h8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, g4c8, g4d7, g4e6, g4g5, g4f5, g4h4, g4f4, g4h3, g4g3, g4f3, g4g2, g4e2, g4g1, g4d1, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, b7b6, a7a6, c6c5, b7b5, a7a5\nmove: f8f2\npuzzle_id: KWUeV\nrating: 2382\nthemes: ['exposedKing', 'fork', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: r3r1k1/1Q5R/p2pq1p1/8/8/2P2P2/PP4P1/2K2R2 b - - 0 24\nside_to_move: black\nlegal_moves_uci: g8f8, e8f8, e8d8, e8c8, e8b8, e8e7, a8d8, a8c8, a8b8, a8a7, e6c8, e6f7, e6e7, e6d7, e6f6, e6f5, e6e5, e6d5, e6g4, e6e4, e6c4, e6h3, e6e3, e6b3, e6e2, e6a2, e6e1, g6g5, d6d5, a6a5\nmove: e6e3\npuzzle_id: Bl3sR\nrating: 2166\nthemes: ['advantage', 'endgame', 'pin', 'veryLong']\nposition_index: 0\n\nposition_fen: 1k1B3r/5p2/1p4P1/1N6/Pp1pB2p/6q1/4K3/R2Q1R2 b - - 2 31\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, b8c8, g3c7, g3g6, g3d6, g3g5, g3e5, g3g4, g3f4, g3h3, g3f3, g3e3, g3d3, g3c3, g3b3, g3a3, g3h2, g3g2, g3f2, g3g1, g3e1, f7g6, f7f6, h4h3, d4d3, b4b3, f7f5\nmove: g3e3\npuzzle_id: lKWY3\nrating: 2553\nthemes: ['exposedKing', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 2\n\nposition_fen: 6r1/R4Qpk/1p2B1p1/4q3/7n/7P/5PP1/2rR2K1 b - - 2 34\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8e8, g8d8, g8c8, g8b8, g8a8, h7h8, h7h6, e5b8, e5c7, e5f6, e5e6, e5d6, e5h5, e5g5, e5f5, e5d5, e5c5, e5b5, e5a5, e5f4, e5e4, e5d4, e5g3, e5e3, e5c3, e5h2, e5e2, e5b2, e5e1, e5a1, h4f5, h4f3, h4g2, c1c8, c1c7, c1c6, c1c5, c1c4, c1c3, c1c2, c1d1, c1b1, c1a1, g6g5, b6b5\nmove: c1d1\npuzzle_id: mPZrZ\nrating: 1134\nthemes: ['mate', 'mateIn2', 'middlegame', 'short']\nposition_index: 1\n\nposition_fen: N1b4r/pp1k1ppp/3b4/4n3/5B2/8/PP3PPP/R3K2R b KQ - 2 16\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, d7e8, d7d8, d7e7, d7e6, d7c6, d6f8, d6b8, d6e7, d6c7, d6c5, d6b4, d6a3, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, h7h6, g7g6, f7f6, b7b6, a7a6, h7h5, g7g5, f7f5, b7b5, a7a5\nmove: e5d3\npuzzle_id: sUfHx\nrating: 701\nthemes: ['crushing', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 5R2/p1p4k/1p2p3/2nr2p1/3B2r1/8/P1P3P1/5RK1 w - - 2 29\nside_to_move: white\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, d4h8, d4g7, d4f6, d4e5, d4c5, d4e3, d4c3, d4f2, d4b2, d4a1, g1h2, g1f2, g1h1, f1f7, f1f6, f1f5, f1f4, f1f3, f1f2, f1e1, f1d1, f1c1, f1b1, f1a1, g2g3, c2c3, a2a3, c2c4, a2a4\nmove: f8f7\npuzzle_id: l7u9R\nrating: 2654\nthemes: ['endgame', 'exposedKing', 'mate', 'mateIn4', 'veryLong']\nposition_index: 1\n\nposition_fen: 2kr1r2/pp3q1p/2ppNnp1/2b1PnB1/7Q/2NP3P/PPP3P1/2KRR3 b - - 0 18\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, d8e8, d8d7, c8b8, c8d7, f7g8, f7e8, f7g7, f7e7, f7d7, f7c7, f7e6, f6g8, f6e8, f6d7, f6h5, f6d5, f6g4, f6e4, f5g7, f5e7, f5h6, f5h4, f5d4, f5g3, f5e3, c5b6, c5d4, c5b4, c5e3, c5a3, c5f2, c5g1, d6e5, h7h6, b7b6, a7a6, d6d5, h7h5, b7b5, a7a5\nmove: f5h4\npuzzle_id: wU5AN\nrating: 1908\nthemes: ['advantage', 'middlegame', 'short', 'trappedPiece']\nposition_index: 1\n\nposition_fen: 6k1/6pp/6q1/Q2Pp3/4Pn2/P7/5P1P/3B1K2 b - - 2 29\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8f7, g6e8, g6f7, g6h6, g6f6, g6e6, g6d6, g6c6, g6b6, g6a6, g6h5, g6g5, g6f5, g6g4, g6e4, g6g3, g6g2, g6g1, f4e6, f4h5, f4d5, f4h3, f4d3, f4g2, f4e2, h7h6, h7h5\nmove: g6g2\npuzzle_id: ajhQg\nrating: 2434\nthemes: ['crushing', 'deflection', 'endgame', 'veryLong']\nposition_index: 1\n\nposition_fen: 8/5pk1/1p4pp/5b2/4N3/2b2PK1/r5PP/5B1R w - - 0 38\nside_to_move: white\nlegal_moves_uci: e4f6, e4d6, e4g5, e4c5, e4c3, e4f2, e4d2, g3h4, g3f4, h1g1, f1a6, f1b5, f1c4, f1d3, f1e2, f3f4, h2h3, h2h4\nmove: e4c3\npuzzle_id: 6ZGw1\nrating: 1407\nthemes: ['advantage', 'endgame', 'hangingPiece', 'oneMove']\nposition_index: 0\n\nposition_fen: 6k1/6pp/5p2/2bPp3/p1P1B3/1b2NKPP/3q4/Q3R3 b - - 4 35\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8f7, c5f8, c5e7, c5a7, c5d6, c5b6, c5d4, c5b4, c5e3, c5a3, b3c4, b3c2, b3a2, b3d1, d2d5, d2a5, d2d4, d2b4, d2e3, d2d3, d2c3, d2h2, d2g2, d2f2, d2e2, d2c2, d2b2, d2a2, d2e1, d2d1, d2c1, h7h6, g7g6, f6f5, a4a3, h7h5, g7g5\nmove: c5e3\npuzzle_id: bqVlW\nrating: 2181\nthemes: ['crushing', 'long', 'master', 'masterVsMaster', 'middlegame']\nposition_index: 0\n\nposition_fen: r1b4r/ppp2k2/4p1n1/3pPp2/3P3q/1PPB1K2/P2NQ1P1/R1B2R2 b - - 1 20\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, c8d7, a8b8, f7g8, f7f8, f7e8, f7g7, f7e7, g6f8, g6e7, g6e5, g6f4, h4d8, h4h7, h4e7, h4h6, h4f6, h4h5, h4g5, h4g4, h4f4, h4e4, h4d4, h4h3, h4g3, h4h2, h4f2, h4h1, h4e1, c7c6, b7b6, a7a6, f5f4, c7c5, b7b5, a7a5\nmove: h4f4\npuzzle_id: 3eUDw\nrating: 2321\nthemes: ['attraction', 'mate', 'mateIn5', 'middlegame', 'veryLong']\nposition_index: 4\n\nposition_fen: r1b2rk1/2p1npp1/2p4p/1pq1P1NQ/p7/R1PBP3/5PPP/3R2K1 w - - 2 25\nside_to_move: white\nlegal_moves_uci: h5f7, h5h6, h5g6, h5h4, h5g4, h5h3, h5f3, h5e2, g5h7, g5f7, g5e6, g5e4, g5h3, g5f3, d3h7, d3g6, d3f5, d3b5, d3e4, d3c4, d3e2, d3c2, d3f1, d3b1, a3a4, a3b3, a3a2, a3a1, g1h1, g1f1, d1d2, d1f1, d1e1, d1c1, d1b1, d1a1, e5e6, e3e4, c3c4, h2h3, g2g3, f2f3, h2h4, g2g4, f2f4\nmove: h5f7\npuzzle_id: 72g6J\nrating: 2396\nthemes: ['kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: r3r1k1/pp5p/2p5/3P1ppq/2P5/4PNK1/PBQ2PPn/R6R b - - 1 24\nside_to_move: black\nlegal_moves_uci: g8f8, g8f7, e8f8, e8d8, e8c8, e8b8, e8e7, e8e6, e8e5, e8e4, e8e3, a8d8, a8c8, a8b8, h5f7, h5h6, h5g6, h5h4, h5g4, h5h3, h5f3, h2g4, h2f3, h2f1, c6d5, h7h6, b7b6, a7a6, c6c5, g5g4, f5f4, b7b5, a7a5\nmove: f5f4\npuzzle_id: xXdv7\nrating: 2588\nthemes: ['attraction', 'discoveredCheck', 'doubleCheck', 'master', 'mate', 'mateIn5', 'middlegame', 'quietMove', 'veryLong']\nposition_index: 2\n\nposition_fen: 1r6/R5pk/7p/2pB4/2P2p2/3Pb2P/RrK3P1/8 w - - 8 39\nside_to_move: white\nlegal_moves_uci: c2c3, c2d1, a2b2\nmove: a2b2\npuzzle_id: lEX3A\nrating: 737\nthemes: ['crushing', 'endgame', 'short']\nposition_index: 0","sha256":"b68ba4599c9818e398f1989f43a959d288d637380761547afa0574d8d250c381","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/brs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 5K2/2k4p/p1pN3n/2P5/1P3P1P/P3r1r1/8/2R1R3 b - - 4 43\nside_to_move: black\nlegal_moves_uci: c7d8, c7b8, c7d7, h6g8, h6f7, h6f5, h6g4, g3g8, g3g7, g3g6, g3g5, g3g4, g3h3, g3f3, g3g2, g3g1, e3e8, e3e7, e3e6, e3e5, e3e4, e3f3, e3d3, e3c3, e3b3, e3a3, e3e2, e3e1, a6a5\nmove: g3g8\n\nposition_fen: 8/p7/2p1k1Pp/1p3b1B/1P6/P1p1b1B1/2R3PP/1K1r4 w - - 1 34\nside_to_move: white\nlegal_moves_uci: b1a2, h5d1\nmove: h5d1\n\nposition_fen: 2r1r1k1/5pp1/4bn1p/3pq3/3npP2/PPBP3P/B5P1/2RQNRK1 b - f3 0 23\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8h7, e8f8, e8d8, e8e7, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, c8c4, c8c3, f6h7, f6d7, f6h5, f6g4, e6d7, e6f5, e6g4, e6h3, e5b8, e5c7, e5d6, e5h5, e5g5, e5f5, e5f4, d4c6, d4f5, d4b5, d4f3, d4b3, d4e2, d4c2, e4d3, g7g6, h6h5, e4e3, g7g5, e4f3\nmove: e4f3\n\nposition_fen: 8/8/7P/3pk3/p3p3/8/2K2PP1/8 b - - 0 45\nside_to_move: black\nlegal_moves_uci: e5f6, e5e6, e5d6, e5f5, e5f4, e5d4, d5d4, e4e3, a4a3\nmove: e5f6\npuzzle_id: BiO2p\nrating: 2083\nthemes: ['crushing', 'defensiveMove', 'endgame', 'knightEndgame', 'veryLong']\nposition_index: 4\n\nposition_fen: r1b3nr/pppk1Np1/1b1P3p/n2B4/8/B1P5/P1q2PPP/RN2R1K1 w - - 1 21\nside_to_move: white\nlegal_moves_uci: f7h8, f7d8, f7h6, f7g5, f7e5, d5b7, d5e6, d5c6, d5e4, d5c4, d5f3, d5b3, a3c5, a3b4, a3b2, a3c1, g1h1, g1f1, e1e8, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, b1d2, d6c7, c3c4, h2h3, g2g3, h2h4, g2g4\nmove: e1e7\npuzzle_id: jsmFp\nrating: 2672\nthemes: ['advancedPawn', 'mate', 'mateIn5', 'opening', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 3Qbkrr/pp6/3P4/5q2/7p/2P5/PP5p/K5R1 w - - 2 38\nside_to_move: white\nlegal_moves_uci: d8e8, d8c8, d8b8, d8a8, d8e7, d8d7, d8c7, d8f6, d8b6, d8g5, d8a5, d8h4, g1g8, g1g7, g1g6, g1g5, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, g1c1, g1b1, d6d7, c3c4, b2b3, a2a3, b2b4, a2a4\nmove: d8e7\npuzzle_id: xAoXK\nrating: 2578\nthemes: ['exposedKing', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 2\n\nposition_fen: 4rkq1/8/1p3P1Q/1PpP4/2P2RP1/7P/4p2K/8 b - - 0 44\nside_to_move: black\nlegal_moves_uci: f8f7, g8g7\nmove: f8f7\npuzzle_id: Q5MjS\nrating: 2021\nthemes: ['advancedPawn', 'advantage', 'endgame', 'promotion', 'veryLong']\nposition_index: 0\n\nposition_fen: 2rR4/p4k1r/8/1Q2Bp2/2q4p/4p3/PP3bPP/5R1K w - - 8 33\nside_to_move: white\nlegal_moves_uci: d8h8, d8g8, d8f8, d8e8, d8c8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, e5h8, e5b8, e5g7, e5c7, e5f6, e5d6, e5f4, e5d4, e5g3, e5c3, b5e8, b5b8, b5d7, b5b7, b5c6, b5b6, b5a6, b5d5, b5c5, b5a5, b5c4, b5b4, b5a4, b5b3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h2h3, g2g3, b2b3, a2a3, g2g4, b2b4, a2a4\nmove: b5e8\npuzzle_id: mYQYb\nrating: 1830\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 2b2r1k/3p1p2/4pPp1/q1p1N1P1/1p1nQ3/1P6/rB1P1PB1/2KR4 w - - 0 22\nside_to_move: white\nlegal_moves_uci: e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, e4a8, e4b7, e4g6, e4c6, e4f5, e4d5, e4h4, e4g4, e4f4, e4d4, e4f3, e4e3, e4d3, e4e2, e4c2, e4e1, e4b1, g2h3, g2f3, g2h1, g2f1, b2d4, b2c3, b2a3, b2a1, d1h1, d1g1, d1f1, d1e1, c1b1, f2f3, d2d3, f2f4\nmove: e5g6\npuzzle_id: NXAep\nrating: 2247\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: rn3rk1/4bb1p/2p3pB/pp2N2n/3q4/PB4QP/1P3PP1/R3R1K1 w - - 4 26\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, h6g5, h6f4, h6e3, h6d2, h6c1, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, g3g6, g3g5, g3h4, g3g4, g3f4, g3f3, g3e3, g3d3, g3c3, g3h2, b3f7, b3e6, b3d5, b3c4, b3a4, b3c2, b3a2, b3d1, g1h2, g1h1, g1f1, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, a1a2, a1d1, a1c1, a1b1, h3h4, a3a4\nmove: e5f7\npuzzle_id: mPgSs\nrating: 2619\nthemes: ['crushing', 'discoveredAttack', 'discoveredCheck', 'kingsideAttack', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/ppQ3pk/5p1p/5Nn1/7K/1P1r3P/P3R1P1/2R3q1 b - - 19 36\nside_to_move: black\nlegal_moves_uci: h7h8, h7g8, h7g6, g5f7, g5e6, g5e4, g5h3, g5f3, d3d8, d3d7, d3d6, d3d5, d3d4, d3h3, d3g3, d3f3, d3e3, d3c3, d3b3, d3d2, d3d1, g1b6, g1c5, g1d4, g1e3, g1h2, g1g2, g1f2, g1h1, g1f1, g1e1, g1d1, g1c1, b7b6, a7a6, h6h5, b7b5, a7a5\nmove: d3h3\npuzzle_id: lsWWy\nrating: 2789\nthemes: ['hookMate', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: 8/4b3/8/PK2k3/8/8/8/8 w - - 1 69\nside_to_move: white\nlegal_moves_uci: b5c6, b5b6, b5a6, b5c4, b5a4, a5a6\nmove: a5a6\npuzzle_id: gHnFr\nrating: 498\nthemes: ['advancedPawn', 'bishopEndgame', 'crushing', 'endgame', 'short']\nposition_index: 0\n\nposition_fen: 6k1/3b2bp/q1n1p1p1/1nQpPN2/2pP1P2/1pP2N1P/1P1B2BK/5R2 b - - 0 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8f7, g7h8, g7f8, g7h6, g7f6, g7e5, d7e8, d7c8, c6d8, c6b8, c6e7, c6a7, c6e5, c6a5, c6d4, c6b4, a6c8, a6a8, a6b7, a6a7, a6b6, a6a5, a6a4, a6a3, a6a2, a6a1, b5c7, b5a7, b5d6, b5d4, b5c3, b5a3, g6f5, e6f5, h7h6, g6g5, h7h5\nmove: g6f5\npuzzle_id: igJQ7\nrating: 2330\nthemes: ['advantage', 'defensiveMove', 'middlegame', 'veryLong']\nposition_index: 1\n\nposition_fen: 2kr3r/Qp6/2pp3p/4p1q1/1PB1Pp1p/P2P1Pbb/2P5/2KR2B1 w - - 1 25\nside_to_move: white\nlegal_moves_uci: a7b8, a7a8, a7b7, a7b6, a7a6, a7c5, a7a5, a7d4, a7a4, a7e3, a7f2, c4g8, c4f7, c4e6, c4a6, c4d5, c4b5, c4b3, c4a2, g1b6, g1c5, g1d4, g1e3, g1h2, g1f2, d1d2, d1f1, d1e1, c1d2, c1b2, c1b1, b4b5, d3d4, a3a4, c2c3\nmove: a7a8\npuzzle_id: KxkOf\nrating: 2320\nthemes: ['deflection', 'mate', 'mateIn5', 'middlegame', 'veryLong']\nposition_index: 1\n\nposition_fen: 5r1k/3r2pp/p3P3/1p6/8/8/PP5P/3R3K w - - 0 40\nside_to_move: white\nlegal_moves_uci: h1g2, h1g1, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, e6d7, e6e7, h2h3, b2b3, a2a3, h2h4, b2b4, a2a4\nmove: e6d7\npuzzle_id: 2aP0M\nrating: 2467\nthemes: ['advancedPawn', 'crushing', 'endgame', 'veryLong']\nposition_index: 3\n\nposition_fen: r4rk1/1b1p1pp1/p4n1p/2bNp3/Q1B3q1/5RP1/PPP2PKP/R1B5 w - - 3 19\nside_to_move: white\nlegal_moves_uci: d5e7, d5c7, d5f6, d5b6, d5f4, d5b4, d5e3, d5c3, c4a6, c4b5, c4d3, c4b3, c4e2, c4f1, a4d7, a4c6, a4a6, a4b5, a4a5, a4b4, a4b3, a4a3, f3f6, f3f5, f3f4, f3e3, f3d3, f3c3, f3b3, f3a3, g2h1, g2g1, g2f1, c1h6, c1g5, c1f4, c1e3, c1d2, a1b1, h2h3, c2c3, b2b3, a2a3, h2h4, b2b4\nmove: d5f6\npuzzle_id: tL78X\nrating: 1614\nthemes: ['crushing', 'discoveredAttack', 'kingsideAttack', 'middlegame', 'short']\nposition_index: 0","sha256":"35c06830eb87ef8fcff7726f344cd2221c89ad8d55c5ca2dfdb4a2a4b300fb7e","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/copro/42":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":true,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/copro/43":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":true,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/copro/44":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":true,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/gepa/42":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/gepa/43":{"text":"You are an expert chess grandmaster engine. Your task is to solve chess tactical puzzles by identifying and outputting the single best move from a provided list of legal moves.\n\n### Inputs:\n- `position_fen`: The current board state in Forsyth-Edwards Notation (FEN).\n- `side_to_move`: The color of the player whose turn it is ('white' or 'black').\n- `legal_moves_uci`: A comma-separated list of all legal moves for the active player in Universal Chess Interface (UCI) notation (e.g., `e2e4`, `g8f6`).\n\n---\n\n### Tactical Evaluation Protocol:\n\nTo find the absolute best move, you must systematically evaluate the position using a strict hierarchy of chess tactics:\n\n1.  **Search for Immediate Checkmate (Mate-in-One):**\n    *   Scan the `legal_moves_uci` list to see if any move delivers immediate checkmate.\n    *   Pay special attention to pawn moves/advances and minor piece maneuvers that trap the enemy king. If a mate-in-one is available, you must select it.\n\n2.  **Prioritize Forcing Captures and Trades:**\n    *   Identify all immediate captures available on the board (e.g., a bishop capturing an active enemy knight, or capturing an undefended piece).\n    *   Calculate the material and positional balance after the capture. If capturing an active enemy piece neutralizes their plans or wins material, prioritize it over passive pawn pushes or king moves.\n\n3.  **Calculate Forcing Sequences (Checks & Direct Threats):**\n    *   Identify checks and direct tactical threats. \n    *   Do not play passive defensive moves or slow pawn advances unless there is absolutely no active tactical alternative. The best defense is often a devastating counter-attack.\n\n4.  **Verify Against Opponent's Best Reply:**\n    *   For your candidate move, visualize the board state after it is played.\n    *   Assume your opponent will make the absolute strongest, most testing reply. If they can easily refute your move, eliminate it and evaluate the next candidate.\n\n---\n\n### Output Format:\nTo maintain a clean and concise output, **do not write down any reasoning, explanations, or step-by-step calculations**. You must output *only* the final chosen move under the `### move` header.\n\n### move\n[uci_move]","sha256":"aeec65b8094e2482219b9d311b77fd581d0530cfd3a2271eecb73aaea609f46f","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/gepa/44":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/miprov2/42":{"text":"You are a world-class Chess Grandmaster and expert puzzle solver. Given a chess board position in FEN format, the active player, and a list of legal UCI moves, determine the single best move to gain a tactical advantage or secure a win. Output only the chosen move from the list, without any reasoning, labels, or additional text.\n\nposition_fen: 5b2/7k/1p2p1p1/3pPpPp/1P1P1P1P/8/5K2/2B5 b - - 0 38\nside_to_move: black\nlegal_moves_uci: f8g7, f8e7, f8h6, f8d6, f8c5, f8b4, h7h8, h7g8, h7g7, b6b5\nmove: f8b4\n\nposition_fen: R1Q2r1k/1p6/3P2p1/2PB4/5p2/4q1P1/6KP/8 b - - 0 32\nside_to_move: black\nlegal_moves_uci: h8h7, h8g7, f8g8, f8e8, f8d8, f8c8, e3e8, e3e7, e3e6, e3e5, e3c5, e3e4, e3d4, e3g3, e3f3, e3d3, e3c3, e3b3, e3a3, e3f2, e3e2, e3d2, e3g1, e3e1, e3c1, f4g3, b7b6, g6g5, f4f3, b7b5\nmove: f4f3\n\nposition_fen: R1Q2r1k/1p6/3P2p1/2P5/8/4qBP1/6KP/8 b - - 0 33\nside_to_move: black\nlegal_moves_uci: h8g8, h8h7, h8g7, f8g8, f8e8, f8d8, f8c8, e3e8, e3e7, e3h6, e3e6, e3g5, e3e5, e3c5, e3f4, e3e4, e3d4, e3f3, e3d3, e3c3, e3b3, e3a3, e3f2, e3e2, e3d2, e3g1, e3e1, e3c1, b7b6, g6g5, b7b5\nmove: e3f3\n\nposition_fen: r5rk/p1p2p1p/1p1p2qp/4p3/2P1R2b/3P2NP/P1P2PP1/1R1Q2K1 w - - 4 21\nside_to_move: white\nlegal_moves_uci: e4e5, e4h4, e4g4, e4f4, e4d4, e4e3, e4e2, e4e1, g3h5, g3f5, g3e2, g3h1, g3f1, g1h2, g1h1, g1f1, d1h5, d1g4, d1f3, d1e2, d1d2, d1f1, d1e1, d1c1, b1b6, b1b5, b1b4, b1b3, b1b2, b1c1, b1a1, c4c5, d3d4, f2f3, c2c3, a2a3, f2f4, a2a4\nmove: e4h4","sha256":"1854f06378ba03aee08a934cd346bb607d73d5610fc0bdaa26397be431fd09ef","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/miprov2/43":{"text":"Identify the single best chess move for the active player from the provided list of legal UCI moves based on the current board position (FEN). Analyze the position for tactical patterns, mating nets, or material gain, and select the optimal move. Output ONLY the move itself, in either UCI or SAN format, without any explanation, labels, or additional text.\n\nposition_fen: 4Rr1k/p7/2p4P/5pN1/7P/5PK1/1rq5/8 w - - 1 46\nside_to_move: white\nlegal_moves_uci: e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, g5h7, g5f7, g5e6, g5e4, g5h3, g3f4, g3h3, h6h7, h4h5, f3f4\nmove: e8f8\n\nposition_fen: r2r2k1/p1p2pp1/2P4p/4p3/1P2n3/7P/P4PP1/RN1R2K1 b - - 0 23\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8h7, d8f8, d8e8, d8c8, d8b8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, a8c8, a8b8, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, g7g6, f7f6, a7a6, h6h5, g7g5, f7f5, a7a5\nmove: d8d1\n\nposition_fen: 3rk2r/p1Q2pp1/1p1Pp1q1/8/3P4/P4R2/3n2PP/1R4K1 w - - 1 26\nside_to_move: white\nlegal_moves_uci: c7d8, c7c8, c7b8, c7f7, c7e7, c7d7, c7b7, c7a7, c7c6, c7b6, c7c5, c7c4, c7c3, c7c2, c7c1, f3f7, f3f6, f3f5, f3f4, f3h3, f3g3, f3e3, f3d3, f3c3, f3b3, f3f2, f3f1, g1f2, g1h1, b1b6, b1b5, b1b4, b1b3, b1b2, b1f1, b1e1, b1d1, b1c1, b1a1, d6d7, d4d5, a3a4, h2h3, g2g3, h2h4, g2g4\nmove: c7e7\n\nposition_fen: 2k1r3/p1p2p1p/2p5/2b4q/2P5/2B3Q1/P1PP1P1P/R1K2B2 b - - 0 19\nside_to_move: black\nlegal_moves_uci: e8h8, e8g8, e8f8, e8d8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, c8d8, c8b8, c8d7, c8b7, h5h6, h5g6, h5g5, h5f5, h5e5, h5d5, h5h4, h5g4, h5h3, h5f3, h5h2, h5e2, h5d1, c5f8, c5e7, c5d6, c5b6, c5d4, c5b4, c5e3, c5a3, c5f2, h7h6, f7f6, a7a6, f7f5, a7a5\nmove: c5a3","sha256":"54e3c8d737791020c4fe714ecbf43a5829190fc8db2ada54fed45f676ff6eee1","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/miprov2/44":{"text":"You are competing in a high-stakes, life-or-death chess championship where only the absolute best move will save you. Analyze the given FEN position, the side to move, and the list of legal UCI moves. Identify and output the single most strategic and tactical legal move to solve the chess puzzle. Your response must contain ONLY the selected move, with no additional explanation, reasoning, or labels.\n\nposition_fen: r4r1k/1p4p1/2n4p/pN1B2n1/2P1p1Q1/P5P1/1PR2q2/3R2K1 w - - 0 25\nside_to_move: white\nlegal_moves_uci: g1h1, c2f2\nmove: c2f2\n\nposition_fen: r1bq1bnr/ppp4p/5k2/n3p1pQ/3PPp1P/8/PPP3P1/RNB1K2R w KQ - 0 10\nside_to_move: white\nlegal_moves_uci: h5e8, h5h7, h5f7, h5h6, h5g6, h5g5, h5g4, h5f3, h5e2, h5d1, h1h3, h1h2, h1g1, h1f1, e1f2, e1e2, e1d2, e1f1, e1d1, c1f4, c1e3, c1d2, b1c3, b1a3, b1d2, e1g1, h4g5, d4e5, d4d5, g2g3, c2c3, b2b3, a2a3, g2g4, c2c4, b2b4, a2a4\nmove: h5g5\n\nposition_fen: 3Q4/4p2p/3p2pk/2pPp3/4P3/5r2/6PP/rR4K1 b - - 2 35\nside_to_move: black\nlegal_moves_uci: h6g7, h6h5, h6g5, f3f8, f3f7, f3f6, f3f5, f3f4, f3h3, f3g3, f3e3, f3d3, f3c3, f3b3, f3a3, f3f2, f3f1, a1a8, a1a7, a1a6, a1a5, a1a4, a1a3, a1a2, a1b1, e7e6, g6g5, c5c4\nmove: a1b1\n\nposition_fen: r7/p1p3pk/7p/4b3/2PpPP2/7q/PPQ5/R4RK1 b - - 0 28\nside_to_move: black\nlegal_moves_uci: a8h8, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, h7h8, h7g8, h7g6, e5f6, e5d6, e5f4, h3c8, h3d7, h3e6, h3h5, h3f5, h3h4, h3g4, h3g3, h3f3, h3e3, h3d3, h3c3, h3b3, h3a3, h3h2, h3g2, h3h1, h3f1, g7g6, c7c6, a7a6, h6h5, d4d3, g7g5, c7c5, a7a5\nmove: e5f4\npuzzle_id: qcwPi\nrating: 2416\nthemes: ['advantage', 'attraction', 'fork', 'middlegame', 'veryLong']\nposition_index: 2","sha256":"75e9d3a1f3f6d948ca61b11abef5813203e4dc55954870b3ce262273f4f618c8","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/simba/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nWhen solving chess puzzles or tactical positions, prioritize calculating forcing moves first—specifically checks (such as `b2a3` which delivers a check to the enemy king) and direct captures. Avoid selecting active-looking but non-forcing moves like `b2f6` until you have thoroughly calculated and ruled out all forcing check options, as they are usually the key to solving high-rating tactics.\n\nWhen evaluating legal moves, prioritize direct captures of highly active enemy pieces (especially major pieces like rooks or queens, e.g., capturing a rook with `h8h2`) over minor pawn captures or defensive blocks (like `f3f2`). Always calculate the immediate material gain and the neutralization of the opponent's attacking threats when a major piece capture is available.\n\nposition_fen: 2r3r1/ppp2Qpk/3p4/4p3/1P4R1/P6P/6PK/2q5 w - - 0 35\nside_to_move: white\nlegal_moves_uci: f7g8, f7f8, f7e8, f7g7, f7e7, f7d7, f7c7, f7g6, f7f6, f7e6, f7h5, f7f5, f7d5, f7f4, f7c4, f7f3, f7b3, f7f2, f7a2, f7f1, g4g7, g4g6, g4g5, g4h4, g4f4, g4e4, g4d4, g4c4, g4g3, h2g3, b4b5, h3h4, a3a4, g2g3\nmove: f7g6\n\nposition_fen: r3r3/2q3pk/pp5p/1n3p2/1P1nN1Q1/3P2RP/5PP1/3R2K1 w - - 0 31\nside_to_move: white\nlegal_moves_uci: g4g7, g4g6, g4h5, g4g5, g4f5, g4h4, g4f4, g4f3, g4e2, e4f6, e4d6, e4g5, e4c5, e4c3, e4d2, g3f3, g3e3, g1h2, g1h1, g1f1, d1d2, d1f1, d1e1, d1c1, d1b1, d1a1, h3h4, f2f3, f2f4\nmove: e4f6","sha256":"7696300112c81d2f127b653b8fe6aa95620f7649cf933cc59de2f640b8fcd62f","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/simba/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 2kr4/p5p1/1p1p3q/2p1pK2/P5R1/3PB1P1/1PP5/R2Q4 b - - 3 28\nside_to_move: black\nlegal_moves_uci: d8h8, d8g8, d8f8, d8e8, d8d7, c8b8, c8d7, c8c7, c8b7, h6h8, h6h7, h6g6, h6f6, h6e6, h6h5, h6g5, h6h4, h6f4, h6h3, h6e3, h6h2, h6h1, g7g6, a7a6, d6d5, b6b5, e5e4, c5c4, g7g5, a7a5\nmove: h6f6","sha256":"f0d0503573292364a3673c97e3d3b971a32576cee89a23f7e44338ffd3d1ed5c","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/muse-spark-1-2-contributor/simba/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nWhen evaluating legal moves, always prioritize checking for immediate checkmates (mate-in-1). Specifically, if you have a queen active near the enemy king and supported by an advanced pawn or another piece (such as a Queen on c7 supported by a pawn on d6), look for direct mating squares (like e7) where the queen can deliver a protected check. Verify whether the enemy king or other pieces can capture your attacking piece, and if they cannot, select this decisive move rather than slower options like pawn pushes (e.g., avoiding d6d7 in favor of c7e7).\n\nWhen evaluating moves, always prioritize looking for forcing checks, especially back-rank threats (e.g., `e8e1`), rather than immediately choosing quiet captures or trades (e.g., `a3b2`). Calculate the forcing lines first to see if they lead to an immediate checkmate or decisive tactical advantage, and only fallback to simple captures if no forcing checkmate sequence is available.","sha256":"73e0edd6ebfe26bc4f7fa18238ddf787ab287fae043a81b9748bd5016170ef70","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/bfs/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 3r1r1k/pp2qppp/2p5/3bP1RP/8/1P2Q3/P1P2P2/1K4R1 w - - 2 26\nside_to_move: white\nlegal_moves_uci: g5g7, g5g6, g5f5, g5g4, g5g3, g5g2, e3a7, e3b6, e3c5, e3f4, e3e4, e3d4, e3h3, e3g3, e3f3, e3d3, e3c3, e3e2, e3d2, e3e1, e3c1, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, g1c1, b1b2, b1c1, b1a1, h5h6, e5e6, b3b4, f2f3, c2c3, a2a3, f2f4, c2c4, a2a4\nmove: g5g7\n\nposition_fen: 8/4q1kp/p2p2p1/2b4n/P7/1Q5P/B1P3KB/1R6 b - - 0 27\nside_to_move: black\nlegal_moves_uci: g7h8, g7f8, g7h6, g7f6, e7f8, e7e8, e7d8, e7f7, e7d7, e7c7, e7b7, e7a7, e7f6, e7e6, e7g5, e7e5, e7h4, e7e4, e7e3, e7e2, e7e1, h5f6, h5f4, h5g3, c5a7, c5b6, c5d4, c5b4, c5e3, c5a3, c5f2, c5g1, h7h6, g6g5, d6d5, a6a5\nmove: e7e2\n\nposition_fen: 8/6kp/p2p2p1/2b4n/P3q3/5Q1P/B1P4B/1R5K b - - 4 29\nside_to_move: black\nlegal_moves_uci: g7h8, g7h6, h5f6, h5f4, h5g3, c5a7, c5b6, c5d4, c5b4, c5e3, c5a3, c5f2, c5g1, e4e8, e4a8, e4e7, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4h4, e4g4, e4f4, e4d4, e4c4, e4b4, e4a4, e4f3, e4e3, e4d3, e4e2, e4c2, e4e1, h7h6, g6g5, d6d5, a6a5\nmove: e4f3\n\nposition_fen: 7k/R4Qp1/1pp2p1p/8/5q2/2P3PP/PP3P1K/3r4 b - - 0 29\nside_to_move: black\nlegal_moves_uci: h8h7, f4b8, f4c7, f4d6, f4g5, f4f5, f4e5, f4h4, f4g4, f4e4, f4d4, f4c4, f4b4, f4a4, f4g3, f4f3, f4e3, f4f2, f4d2, f4c1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1h1, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, g7g6, h6h5, f6f5, c6c5, b6b5, g7g5\nmove: f4f2\n\nposition_fen: 7r/5k2/2p2b2/2p2P2/2P3K1/5RN1/7P/8 b - - 8 46\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, f7g8, f7f8, f7e8, f7g7, f7e7, f6d8, f6g7, f6e7, f6g5, f6e5, f6h4, f6d4, f6c3, f6b2, f6a1\nmove: h8h4\npuzzle_id: LPIS0\nrating: 2432\nthemes: ['endgame', 'long', 'mate', 'mateIn3', 'operaMate']\nposition_index: 2\n\nposition_fen: r6R/pq1k1p2/1p2b1p1/3P1pb1/6p1/BP1Q2P1/P1B2PK1/8 w - - 5 30\nside_to_move: white\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8a8, h8h7, h8h6, h8h5, h8h4, h8h3, h8h2, h8h1, d3a6, d3f5, d3b5, d3e4, d3d4, d3c4, d3f3, d3e3, d3c3, d3e2, d3d2, d3f1, d3d1, a3f8, a3e7, a3d6, a3c5, a3b4, a3b2, a3c1, g2h2, g2h1, g2g1, g2f1, c2d1, c2b1, b3b4, f2f3, f2f4\nmove: d3b5\npuzzle_id: FZqMM\nrating: 2222\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 6k1/1p1P1p2/4p1p1/P1Rp3p/1P3P2/2Q3KP/6P1/3q2b1 b - - 2 34\nside_to_move: black\nlegal_moves_uci: g8f8, g8h7, g1c5, g1d4, g1e3, g1h2, g1f2, d1g4, d1d4, d1a4, d1f3, d1d3, d1b3, d1e2, d1d2, d1c2, d1f1, d1e1, d1c1, d1b1, d1a1, f7f6, b7b6, g6g5, e6e5, h5h4, d5d4, f7f5, b7b5\nmove: h5h4\npuzzle_id: tyHzQ\nrating: 2434\nthemes: ['attraction', 'endgame', 'fork', 'mate', 'mateIn5', 'veryLong']\nposition_index: 1\n\nposition_fen: 1r3r1k/5ppB/p7/6P1/1p1p1q1Q/6N1/PPP5/1K1b4 w - - 0 31\nside_to_move: white\nlegal_moves_uci: h7g8, h7g6, h7f5, h7e4, h7d3, h4h6, h4h5, h4g4, h4f4, h4h3, h4h2, h4h1, g3h5, g3f5, g3e4, g3e2, g3h1, g3f1, b1a1, g5g6, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: h4f4\npuzzle_id: 4dQTV\nrating: 2685\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: 3k4/7r/1b4B1/8/4pnP1/8/5R2/2R3K1 b - - 15 57\nside_to_move: black\nlegal_moves_uci: d8e7, d8d7, h7h8, h7g7, h7f7, h7e7, h7d7, h7c7, h7b7, h7a7, h7h6, h7h5, h7h4, h7h3, h7h2, h7h1, b6c7, b6a7, b6c5, b6a5, b6d4, b6e3, b6f2, f4g6, f4e6, f4h5, f4d5, f4h3, f4d3, f4g2, f4e2, e4e3\nmove: f4g6\npuzzle_id: 4WNM9\nrating: 2668\nthemes: ['crushing', 'endgame', 'exposedKing', 'master', 'pin', 'veryLong']\nposition_index: 1\n\nposition_fen: 5rk1/p4p2/3Q2p1/5q1p/6P1/5P1K/7P/4R2R b - - 0 35\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8g7, f8e8, f8d8, f8c8, f8b8, f8a8, f5c8, f5d7, f5f6, f5e6, f5g5, f5e5, f5d5, f5c5, f5b5, f5a5, f5g4, f5f4, f5e4, f5f3, f5d3, f5c2, f5b1, h5g4, f7f6, a7a6, g6g5, h5h4, a7a5\nmove: f5f3\npuzzle_id: 6ziXy\nrating: 2213\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: r7/5k2/pp1p1ppp/2pP4/2P2q2/2PB3Q/P1K5/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h3c8, h3d7, h3h6, h3e6, h3h5, h3f5, h3h4, h3g4, h3g3, h3f3, h3e3, h3h2, h3g2, h3h1, h3f1, d3g6, d3f5, d3e4, d3e2, d3f1, c2b3, c2b2, c2d1, c2b1, a2a3, a2a4\nmove: h3d7\npuzzle_id: 5nfOl\nrating: 2156\nthemes: ['attraction', 'crushing', 'deflection', 'endgame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 4r1k1/rp3ppp/p7/P2N4/3P1q2/QP1np2P/2R2PP1/1N3K1R b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, e8e5, e8e4, a7a8, f4b8, f4c7, f4h6, f4f6, f4d6, f4g5, f4f5, f4e5, f4h4, f4g4, f4e4, f4d4, f4g3, f4f3, f4h2, f4f2, d3e5, d3c5, d3b4, d3f2, d3b2, d3e1, d3c1, e3f2, h7h6, g7g6, f7f6, b7b6, e3e2, h7h5, g7g5, f7f5, b7b5\nmove: e3e2\npuzzle_id: 3Mg46\nrating: 2418\nthemes: ['advancedPawn', 'long', 'master', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 0\n\nposition_fen: 5rk1/3Q4/2p5/3p4/6p1/1P2r2q/P6p/2RK2R1 w - - 0 36\nside_to_move: white\nlegal_moves_uci: d7e8, d7d8, d7c8, d7h7, d7g7, d7f7, d7e7, d7c7, d7b7, d7a7, d7e6, d7d6, d7c6, d7f5, d7d5, d7g4, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, d1d2, d1c2, c1c6, c1c5, c1c4, c1c3, c1c2, c1b1, c1a1, b3b4, a2a3, a2a4\nmove: g1g4\npuzzle_id: CNFx5\nrating: 1127\nthemes: ['crushing', 'endgame', 'short']\nposition_index: 0\n\nposition_fen: r4r2/5p1k/p2p4/q3nN2/1p4Q1/8/PPP5/2K2nN1 w - - 2 29\nside_to_move: white\nlegal_moves_uci: f5g7, f5e7, f5h6, f5d6, f5h4, f5d4, f5g3, f5e3, g4g8, g4g7, g4g6, g4h5, g4g5, g4h4, g4f4, g4e4, g4d4, g4c4, g4b4, g4h3, g4g3, g4f3, g4g2, g4e2, g4d1, g1h3, g1f3, g1e2, c1d1, c1b1, c2c3, b2b3, a2a3, c2c4, a2a4\nmove: g4g7\npuzzle_id: GJCXh\nrating: 2676\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'veryLong']\nposition_index: 4\n\nposition_fen: r2r2kb/pp2pp1p/2q2npB/4p3/8/2N5/PPPQ1PPP/3R1RK1 w - - 0 15\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, h6g5, h6f4, h6e3, c3d5, c3b5, c3e4, c3a4, c3e2, c3b1, d2d8, d2d7, d2d6, d2g5, d2d5, d2f4, d2d4, d2e3, d2d3, d2e2, d2e1, d2c1, g1h1, f1e1, d1e1, d1c1, d1b1, d1a1, h2h3, g2g3, f2f3, b2b3, a2a3, h2h4, g2g4, f2f4, b2b4, a2a4\nmove: d2d8\npuzzle_id: XLka2\nrating: 640\nthemes: ['crushing', 'kingsideAttack', 'middlegame', 'short']\nposition_index: 0","sha256":"dbc8c5913e1c4c91f3ed20f1f1434eb51fc4d42297afbfeef0f8405197608e2c","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/bfs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 6k1/pp6/2p5/3p3p/3P2p1/P3P1PP/1P3K2/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: f2g2, f2e2, f2g1, f2f1, f2e1, h3g4, h3h4, e3e4, a3a4, b2b3, b2b4\nmove: h3g4\n\nposition_fen: 8/8/8/5p2/7P/8/4K1kP/8 b - - 0 51\nside_to_move: black\nlegal_moves_uci: g2h3, g2h2, g2h1, g2g1, f5f4\nmove: f5f4\n\nposition_fen: 8/8/8/7P/5p2/8/4K1kP/8 b - - 0 52\nside_to_move: black\nlegal_moves_uci: g2h3, g2h2, g2h1, g2g1, f4f3\nmove: f4f3\n\nposition_fen: 8/8/pP6/4k3/3r3p/8/1R5K/8 w - - 1 56\nside_to_move: white\nlegal_moves_uci: h2h3, h2g2, h2h1, h2g1, b2b5, b2b4, b2b3, b2g2, b2f2, b2e2, b2d2, b2c2, b2a2, b2b1, b6b7\nmove: b6b7\n\nposition_fen: 3r4/5k2/8/1p2PKp1/pP1N2P1/6p1/1P4P1/8 w - - 4 33\nside_to_move: white\nlegal_moves_uci: f5g5, f5e4, d4e6, d4c6, d4b5, d4f3, d4b3, d4e2, d4c2, e5e6, b2b3\nmove: e5e6\npuzzle_id: 5eBes\nrating: 2381\nthemes: ['crushing', 'endgame', 'veryLong', 'zugzwang']\nposition_index: 0\n\nposition_fen: 5rkr/pp2q1p1/4n1Q1/3nPR1p/4N3/8/PP4PP/5R1K w - - 8 24\nside_to_move: white\nlegal_moves_uci: g6e8, g6h7, g6g7, g6f7, g6h6, g6f6, g6e6, g6h5, g6g5, g6g4, g6g3, f5f8, f5f7, f5f6, f5h5, f5g5, f5f4, f5f3, f5f2, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h1g1, f1f4, f1f3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: g6e6\npuzzle_id: 4uOji\nrating: 2195\nthemes: ['crushing', 'deflection', 'fork', 'master', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: Rn4k1/6pp/3p4/1B1Pq3/1PN1n3/7P/2P2RK1/3Q4 b - - 0 27\nside_to_move: black\nlegal_moves_uci: g8h8, e5e8, e5e7, e5f6, e5e6, e5h5, e5g5, e5f5, e5d5, e5f4, e5d4, e5g3, e5c3, e5h2, e5b2, e5a1, e4f6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, h7h6, g7g6, h7h5, g7g5\nmove: e5g3\npuzzle_id: u5Z6U\nrating: 2563\nthemes: ['attraction', 'kingsideAttack', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: 8/6nk/p3p2p/1b1pNp1N/1b1P1P1P/4q3/6PK/8 w - - 0 33\nside_to_move: white\nlegal_moves_uci: h5g7, h5f6, h5g3, e5f7, e5d7, e5g6, e5c6, e5g4, e5c4, e5f3, e5d3, h2h1, g2g3, g2g4\nmove: h5f6\npuzzle_id: saT5n\nrating: 2740\nthemes: ['long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 7r/5pk1/3p1P2/1p4q1/3p4/PQ1B4/1P3p2/5K1R b - - 0 46\nside_to_move: black\nlegal_moves_uci: g7g8, g7f8, g7f6, g5f6\nmove: g7f6\npuzzle_id: xAiWS\nrating: 2314\nthemes: ['advantage', 'endgame', 'exposedKing', 'long', 'skewer']\nposition_index: 0\n\nposition_fen: 7k/p5pp/3p4/2p1p3/2P3q1/1PQ2rP1/P4n1P/2B1KR2 w - - 0 28\nside_to_move: white\nlegal_moves_uci: c3e5, c3a5, c3d4, c3b4, c3f3, c3e3, c3d3, c3d2, c3c2, c3b2, c3a1, f1f2, f1h1, f1g1, e1e2, e1d2, c1h6, c1g5, c1f4, c1e3, c1a3, c1d2, c1b2, b3b4, h2h3, a2a3, h2h4, a2a4\nmove: f1f2\npuzzle_id: KXgrS\nrating: 2165\nthemes: ['advantage', 'long', 'middlegame']\nposition_index: 2\n\nposition_fen: 6n1/1p4Pk/2p1N2P/p5K1/8/8/8/8 w - - 1 53\nside_to_move: white\nlegal_moves_uci: e6f8, e6d8, e6c7, e6c5, e6f4, e6d4, g5h5, g5f5, g5h4, g5g4, g5f4\nmove: e6f8\npuzzle_id: mZF9a\nrating: 513\nthemes: ['endgame', 'knightEndgame', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0\n\nposition_fen: 4rr2/p7/1p3k1p/2p1Rp2/6p1/P7/1P3PPP/4RK2 w - - 5 26\nside_to_move: white\nlegal_moves_uci: e5e8, e5e7, e5e6, e5f5, e5d5, e5c5, e5e4, e5e3, e5e2, f1e2, f1g1, e1e4, e1e3, e1e2, e1d1, e1c1, e1b1, e1a1, a3a4, h2h3, g2g3, f2f3, b2b3, h2h4, f2f4, b2b4\nmove: e5e8\npuzzle_id: vOxk6\nrating: 939\nthemes: ['crushing', 'endgame', 'rookEndgame', 'short']\nposition_index: 0\n\nposition_fen: 1r5k/p5p1/6Pp/Q6P/8/8/P4P2/KR1r4 b - - 2 40\nside_to_move: black\nlegal_moves_uci: h8g8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1h1, d1g1, d1f1, d1e1, d1c1, d1b1, a7a6\nmove: d1b1\npuzzle_id: TMIoF\nrating: 1117\nthemes: ['endgame', 'mate', 'mateIn2', 'queenRookEndgame', 'short']\nposition_index: 1\n\nposition_fen: 1R6/4k3/7r/2p3K1/4p3/8/8/8 w - - 0 53\nside_to_move: white\nlegal_moves_uci: b8h8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, g5h6, g5f5, g5g4, g5f4\nmove: g5h6\npuzzle_id: 0ErLd\nrating: 2296\nthemes: ['crushing', 'endgame', 'exposedKing', 'rookEndgame', 'veryLong']\nposition_index: 3\n\nposition_fen: Q2qkb1r/p2bpppp/8/1B1P4/4nB2/4PK2/PP1p1PPP/n5NR w k - 1 16\nside_to_move: white\nlegal_moves_uci: a8d8, a8c8, a8b8, a8b7, a8a7, a8c6, b5d7, b5c6, b5a6, b5c4, b5a4, b5d3, b5e2, b5f1, f4b8, f4c7, f4h6, f4d6, f4g5, f4e5, f4g3, f3e4, f3e2, g1h3, g1e2, d5d6, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: b5d7\npuzzle_id: lQxX8\nrating: 2532\nthemes: ['attraction', 'clearance', 'fork', 'mate', 'mateIn5', 'middlegame', 'pin', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: 1k6/1P6/1K6/6B1/6P1/8/8/4q3 w - - 0 56\nside_to_move: white\nlegal_moves_uci: b6c6, b6a6, b6c5, b6b5, g5d8, g5e7, g5h6, g5f6, g5h4, g5f4, g5e3, g5d2, g5c1\nmove: g5f4\npuzzle_id: Nx8za\nrating: 836\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 0","sha256":"23fbfc97ebbbd05f89038775250f2cf78f6f6beaf645f89c0e915d57c15288bb","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/bfs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 6k1/5pp1/p3p2p/8/4n3/1BP5/PP2KPP1/4R2q w - - 0 35\nside_to_move: white\nlegal_moves_uci: b3e6, b3d5, b3c4, b3a4, b3c2, b3d1, e2f3, e2e3, e2d3, e2d1, e1h1, e1g1, e1f1, e1d1, e1c1, e1b1, e1a1, c3c4, g2g3, f2f3, a2a3, g2g4, f2f4, a2a4\nmove: e1h1\n\nposition_fen: 2k4r/ppp2p2/3bpq2/8/3P4/2P2Q2/PP3P1p/4RR1K b - - 0 24\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, h8h4, h8h3, c8d8, c8b8, c8d7, f6d8, f6g7, f6e7, f6h6, f6g6, f6g5, f6f5, f6e5, f6h4, f6f4, f6d4, f6f3, d6f8, d6e7, d6e5, d6c5, d6f4, d6b4, d6g3, d6a3, c7c6, b7b6, a7a6, e6e5, c7c5, b7b5, a7a5\nmove: f6f3\n\nposition_fen: 3r1k2/1p1q4/p3n1R1/4Pp1Q/3p4/P6P/1P1r4/7K w - - 1 48\nside_to_move: white\nlegal_moves_uci: g6g8, g6g7, g6h6, g6f6, g6e6, g6g5, g6g4, g6g3, g6g2, g6g1, h5h8, h5h7, h5h6, h5g5, h5f5, h5h4, h5g4, h5f3, h5e2, h5d1, h1g1, h3h4, a3a4, b2b3, b2b4\nmove: h5h8\n\nposition_fen: 7k/ppp4p/8/4p3/4qr2/7P/1PP3R1/3Q3K w - - 2 31\nside_to_move: white\nlegal_moves_uci: h1h2, h1g1, d1d8, d1d7, d1d6, d1h5, d1d5, d1g4, d1d4, d1f3, d1d3, d1e2, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, h3h4, c2c3, b2b3, c2c4, b2b4\nmove: d1d8\n\nposition_fen: r3r1k1/1p1qbppp/p1n5/2pp1N2/6N1/2PP3P/PP3PP1/R2QR1K1 b - - 6 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, a8d8, a8c8, a8b8, a8a7, e7f8, e7d8, e7f6, e7d6, e7g5, e7h4, d7d8, d7c8, d7c7, d7e6, d7d6, d7f5, c6d8, c6b8, c6a7, c6e5, c6a5, c6d4, c6b4, h7h6, g7g6, f7f6, b7b6, a6a5, d5d4, c5c4, h7h5, g7g5, b7b5\nmove: d7f5\npuzzle_id: DmJlo\nrating: 792\nthemes: ['advantage', 'hangingPiece', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 5r2/6pk/p1NpR2p/1p1P4/1P6/r6P/2P2RP1/6K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, h7h8, h7g8, a3a5, a3a4, a3h3, a3g3, a3f3, a3e3, a3d3, a3c3, a3b3, a3a2, a3a1, g7g6, h6h5, a6a5, g7g5\nmove: a3a1\npuzzle_id: lGCTU\nrating: 2024\nthemes: ['advantage', 'deflection', 'endgame', 'long', 'sacrifice']\nposition_index: 1\n\nposition_fen: 3r1rk1/4R2p/p4bp1/1p3p2/4QPP1/8/P4q1P/3R3K w - - 0 29\nside_to_move: white\nlegal_moves_uci: e7e8, e7h7, e7g7, e7f7, e7d7, e7c7, e7b7, e7a7, e7e6, e7e5, e4a8, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4d4, e4c4, e4b4, e4a4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, e4b1, d1d8, d1d7, d1d6, d1d5, d1d4, d1d3, d1d2, d1g1, d1f1, d1e1, d1c1, d1b1, d1a1, g4f5, g4g5, h2h3, a2a3, h2h4, a2a4\nmove: e4e6\npuzzle_id: 0PhbW\nrating: 2606\nthemes: ['deflection', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 7k/3n2p1/4Q2p/3p2N1/8/3q4/1P3KPP/r3B3 w - - 0 29\nside_to_move: white\nlegal_moves_uci: e6g8, e6e8, e6f7, e6e7, e6d7, e6h6, e6g6, e6f6, e6d6, e6c6, e6b6, e6a6, e6f5, e6e5, e6d5, e6g4, e6e4, e6h3, e6e3, e6e2, g5h7, g5f7, g5e4, g5h3, g5f3, f2g1, e1a5, e1b4, e1c3, e1d2, h2h3, g2g3, b2b3, h2h4, g2g4, b2b4\nmove: e6e8\npuzzle_id: vyvus\nrating: 1408\nthemes: ['endgame', 'fork', 'mate', 'mateIn2', 'short']\nposition_index: 0\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb2k/2p4P/8/2P2Q2/PP1P1PP1/RNB1K2R w KQ - 1 13\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1h4, h1h3, h1h2, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, g2g3, d2d3, b2b3, a2a3, g2g4, d2d4, b2b4, a2a4\nmove: f3e3\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 2\n\nposition_fen: 4k3/2p3R1/2p1PK2/5r2/p2P4/r7/8/B7 w - - 0 47\nside_to_move: white\nlegal_moves_uci: f6g6, f6f5\nmove: f6f5\npuzzle_id: 52eVA\nrating: 2338\nthemes: ['crushing', 'defensiveMove', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: 1r4RQ/p5r1/2n1pk1p/5p1q/2PP4/5P2/P4P1P/R6K w - - 6 31\nside_to_move: white\nlegal_moves_uci: h8h7, h8g7, h8h6, g8f8, g8e8, g8d8, g8c8, g8b8, g8g7, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, d4d5, c4c5, f3f4, h2h3, a2a3, h2h4, a2a4\nmove: h8g7\npuzzle_id: C9c6a\nrating: 2054\nthemes: ['discoveredAttack', 'discoveredCheck', 'exposedKing', 'mate', 'mateIn4', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: rn3rk1/4b2p/6pB/pp1p2N1/8/P5nP/1P3PP1/R3R1K1 w - - 0 29\nside_to_move: white\nlegal_moves_uci: h6f8, h6g7, g5h7, g5f7, g5e6, g5e4, g5f3, g1h2, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, a1a2, a1d1, a1c1, a1b1, f2g3, h3h4, a3a4, f2f3, b2b3, f2f4, b2b4\nmove: e1e7\npuzzle_id: mPgSs\nrating: 2619\nthemes: ['crushing', 'discoveredAttack', 'discoveredCheck', 'kingsideAttack', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 3\n\nposition_fen: r4rk1/ppp2pq1/3p2p1/3Np1n1/3nP1pQ/8/PPP2P2/1K3B1R w - - 4 19\nside_to_move: white\nlegal_moves_uci: d5e7, d5c7, d5f6, d5b6, d5f4, d5b4, d5e3, d5c3, h4h8, h4h7, h4h6, h4h5, h4g5, h4g4, h4h3, h4g3, h4h2, h1h3, h1h2, h1g1, f1a6, f1b5, f1c4, f1h3, f1d3, f1g2, f1e2, b1c1, b1a1, f2f3, c2c3, b2b3, a2a3, f2f4, c2c4, b2b4, a2a4\nmove: d5e7\npuzzle_id: m17EB\nrating: 1277\nthemes: ['mate', 'mateIn1', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 8/5pkp/2BR2p1/1pP1p3/1P5q/3QP2P/5P1K/r7 b - - 0 32\nside_to_move: black\nlegal_moves_uci: g7h8, g7g8, g7f8, g7h6, h4d8, h4e7, h4h6, h4f6, h4h5, h4g5, h4g4, h4f4, h4e4, h4d4, h4c4, h4b4, h4h3, h4g3, h4f2, a1a8, a1a7, a1a6, a1a5, a1a4, a1a3, a1a2, a1h1, a1g1, a1f1, a1e1, a1d1, a1c1, a1b1, h7h6, f7f6, g6g5, e5e4, h7h5, f7f5\nmove: h4f2\npuzzle_id: HNck2\nrating: 2516\nthemes: ['advantage', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: rn1q1b1r/pp2p1pp/1n1pb3/2p3k1/8/2P2Q2/PP1P1PPP/RNB1K2R w KQ - 0 11\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3b7, f3f6, f3c6, f3h5, f3f5, f3d5, f3g4, f3f4, f3e4, f3h3, f3g3, f3e3, f3d3, f3e2, f3d1, h1g1, h1f1, e1e2, e1f1, e1d1, b1a3, e1g1, c3c4, h2h3, g2g3, d2d3, b2b3, a2a3, h2h4, g2g4, d2d4, b2b4, a2a4\nmove: h2h4\npuzzle_id: vhttx\nrating: 2547\nthemes: ['fork', 'master', 'mate', 'mateIn5', 'opening', 'veryLong']\nposition_index: 0\n\nposition_fen: r5k1/3n1pbp/6p1/8/3Bq3/1P5P/P1RQ2P1/1K5R b - - 3 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, a8a6, a8a5, a8a4, a8a3, a8a2, g7h8, g7f8, g7h6, g7f6, g7e5, g7d4, d7f8, d7b8, d7f6, d7b6, d7e5, d7c5, e4e8, e4e7, e4b7, e4e6, e4c6, e4f5, e4e5, e4d5, e4h4, e4g4, e4f4, e4d4, e4f3, e4e3, e4d3, e4g2, e4e2, e4c2, e4e1, h7h6, f7f6, g6g5, h7h5, f7f5\nmove: g7d4\npuzzle_id: uHEok\nrating: 1301\nthemes: ['crushing', 'discoveredAttack', 'middlegame', 'short']\nposition_index: 1","sha256":"ca92f942babe29f22f6a9398efe0f022c08827a60da6a3061bdbc4d010abc581","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/brs/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 1rb5/p4k1q/1p2pN1P/2p2pp1/2P5/8/P1B1RPP1/6K1 w - - 2 29\nside_to_move: white\nlegal_moves_uci: f6g8, f6e8, f6h7, f6d7, f6h5, f6d5, f6g4, f6e4, e2e6, e2e5, e2e4, e2e3, e2d2, e2e1, c2f5, c2e4, c2a4, c2d3, c2b3, c2d1, c2b1, g1h2, g1h1, g1f1, g2g3, f2f3, a2a3, g2g4, f2f4, a2a4\nmove: f6h7\n\nposition_fen: Q7/6pp/6p1/8/3k4/5K1P/2p3P1/8 b - - 0 43\nside_to_move: black\nlegal_moves_uci: d4e5, d4c5, d4c4, d4d3, d4c3, h7h6, g6g5, c2c1q, c2c1r, c2c1b, c2c1n, h7h5\nmove: c2c1q\n\nposition_fen: 6k1/p5p1/2p3Qp/8/3B2PK/2P2r2/PP2r2R/R7 b - - 1 34\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, f3f8, f3f7, f3f6, f3f5, f3f4, f3h3, f3g3, f3e3, f3d3, f3c3, f3f2, f3f1, e2e8, e2e7, e2e6, e2e5, e2e4, e2e3, e2h2, e2g2, e2f2, e2d2, e2c2, e2b2, e2e1, a7a6, h6h5, c6c5, a7a5\nmove: e2h2\npuzzle_id: XGwZ5\nrating: 2639\nthemes: ['deflection', 'discoveredAttack', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 2\n\nposition_fen: r3r2k/2q3p1/pp3NQp/1n3p2/1P6/3P2RP/4nPP1/3R2K1 w - - 4 33\nside_to_move: white\nlegal_moves_uci: g1h2, g1h1, g1f1\nmove: g1h2\npuzzle_id: EWmia\nrating: 2438\nthemes: ['advantage', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 4k3/2p3R1/2p1PK2/5r2/p2P4/r7/8/B7 w - - 0 47\nside_to_move: white\nlegal_moves_uci: f6g6, f6f5\nmove: f6f5\npuzzle_id: 52eVA\nrating: 2338\nthemes: ['crushing', 'defensiveMove', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: R3r1k1/8/1p4K1/1Pp2P2/3n4/8/8/8 w - - 2 61\nside_to_move: white\nlegal_moves_uci: a8e8, a8d8, a8c8, a8b8, a8a7, a8a6, a8a5, a8a4, a8a3, a8a2, a8a1, g6h6, g6f6, g6h5, g6g5, f5f6\nmove: a8e8\npuzzle_id: aEO4c\nrating: 1401\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 1\n\nposition_fen: rn2r1k1/p1b2ppp/2p2n2/2Np4/1P6/P2P1B1P/3B1PPq/R2QRK2 b - - 2 18\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, b8d7, b8a6, c7d8, c7d6, c7b6, c7e5, c7a5, c7f4, c7g3, f6d7, f6h5, f6g4, f6e4, h2d6, h2e5, h2f4, h2h3, h2g3, h2g2, h2h1, h2g1, h7h6, g7g6, a7a6, d5d4, h7h5, g7g5, a7a5\nmove: h2h1\npuzzle_id: 6zFvF\nrating: 984\nthemes: ['kingsideAttack', 'mate', 'mateIn2', 'opening', 'short']\nposition_index: 1\n\nposition_fen: r4r2/pppnbk2/8/3pp1B1/4P2Q/5q2/PPP2P2/RN2K3 w Q - 0 22\nside_to_move: white\nlegal_moves_uci: g5e7, g5h6, g5f6, g5f4, g5e3, g5d2, g5c1, h4h8, h4h7, h4h6, h4h5, h4g4, h4f4, h4h3, h4g3, h4h2, h4h1, e1d2, e1f1, b1c3, b1a3, b1d2, e4d5, c2c3, b2b3, a2a3, c2c4, b2b4, a2a4\nmove: h4h7\npuzzle_id: uDWXg\nrating: 2341\nthemes: ['exposedKing', 'long', 'mate', 'mateIn3', 'middlegame', 'sacrifice']\nposition_index: 1\n\nposition_fen: 5rk1/1b2bppp/ppr1p3/3qB3/3P2Q1/4P1nP/PP4PN/1B1R1RK1 b - - 4 22\nside_to_move: black\nlegal_moves_uci: g8h8, f8e8, f8d8, f8c8, f8b8, f8a8, e7d8, e7f6, e7d6, e7g5, e7c5, e7h4, e7b4, e7a3, b7c8, b7a8, c6c8, c6c7, c6d6, c6c5, c6c4, c6c3, c6c2, c6c1, d5d8, d5d7, d5d6, d5e5, d5c5, d5b5, d5a5, d5e4, d5d4, d5c4, d5f3, d5b3, d5g2, d5a2, g3h5, g3f5, g3e4, g3e2, g3h1, g3f1, h7h6, g7g6, f7f6, b6b5, a6a5, h7h5, g7g5, f7f5\nmove: d5g2\npuzzle_id: 5OnYn\nrating: 2183\nthemes: ['attraction', 'discoveredCheck', 'doubleCheck', 'kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: 2r4k/pp1b4/3R1p1p/8/3NP3/1Q3P2/PP3nqP/1KR5 b - - 3 27\nside_to_move: black\nlegal_moves_uci: h8h7, h8g7, c8g8, c8f8, c8e8, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, c8c4, c8c3, c8c2, c8c1, d7e8, d7e6, d7c6, d7f5, d7b5, d7g4, d7a4, d7h3, g2g8, g2g7, g2g6, g2g5, g2g4, g2h3, g2g3, g2f3, g2h2, g2h1, g2g1, g2f1, f2g4, f2e4, f2h3, f2d3, f2h1, f2d1, b7b6, a7a6, h6h5, f6f5, b7b5, a7a5\nmove: c8c1\npuzzle_id: uyEMf\nrating: 2599\nthemes: ['advantage', 'attraction', 'fork', 'middlegame', 'veryLong']\nposition_index: 0\n\nposition_fen: k1r5/pp2Q3/r7/3p4/P2PpNP1/KP2P3/2q2P2/3R3R b - - 3 40\nside_to_move: black\nlegal_moves_uci: c8h8, c8g8, c8f8, c8e8, c8d8, c8b8, c8c7, c8c6, c8c5, c8c4, c8c3, a8b8, a6h6, a6g6, a6f6, a6e6, a6d6, a6c6, a6b6, a6a5, a6a4, c2c7, c2c6, c2c5, c2c4, c2d3, c2c3, c2b3, c2f2, c2e2, c2d2, c2b2, c2a2, c2d1, c2c1, c2b1, b7b6, b7b5\nmove: b7b5\npuzzle_id: wonMd\nrating: 2200\nthemes: ['advantage', 'exposedKing', 'middlegame', 'pin', 'veryLong']\nposition_index: 2\n\nposition_fen: 2k3r1/ppp1p3/7p/8/4PB2/5N2/PK4RP/8 b - - 0 25\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8e8, g8d8, g8g7, g8g6, g8g5, g8g4, g8g3, g8g2, c8d8, c8b8, c8d7, e7e6, c7c6, b7b6, a7a6, h6h5, e7e5, c7c5, b7b5, a7a5\nmove: g8g2\npuzzle_id: JUEhk\nrating: 513\nthemes: ['advantage', 'endgame', 'hangingPiece', 'oneMove']\nposition_index: 0\n\nposition_fen: 2Q5/3n1ppp/4k3/8/1P6/7P/6PK/4q3 w - - 0 42\nside_to_move: white\nlegal_moves_uci: c8h8, c8g8, c8f8, c8e8, c8d8, c8b8, c8a8, c8d7, c8c7, c8b7, c8c6, c8a6, c8c5, c8c4, c8c3, c8c2, c8c1, b4b5, h3h4, g2g3, g2g4\nmove: c8e8\npuzzle_id: uVlY9\nrating: 2723\nthemes: ['crushing', 'endgame', 'skewer', 'veryLong']\nposition_index: 3\n\nposition_fen: Qn1qk2r/p1p3pp/4pn2/4p3/1b6/2N5/PPp1NPPP/R1B1K2R b KQk - 2 11\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, e8f8, e8f7, e8e7, e8d7, d8c8, d8e7, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, b8d7, b8c6, b8a6, f6g8, f6d7, f6h5, f6d5, f6g4, f6e4, b4f8, b4e7, b4d6, b4c5, b4a5, b4c3, b4a3, e8g8, h7h6, g7g6, c7c6, a7a6, e5e4, h7h5, g7g5, c7c5, a7a5\nmove: d8d1\npuzzle_id: fxUFR\nrating: 1802\nthemes: ['mate', 'mateIn1', 'oneMove', 'opening', 'pin']\nposition_index: 0\n\nposition_fen: 1k2r1r1/1p5p/pP3b2/6p1/3pp3/7P/2Q2PP1/4R1K1 w - - 2 30\nside_to_move: white\nlegal_moves_uci: c2c8, c2c7, c2c6, c2c5, c2e4, c2c4, c2a4, c2d3, c2c3, c2b3, c2e2, c2d2, c2b2, c2a2, c2d1, c2c1, c2b1, g1h2, g1h1, g1f1, e1e4, e1e3, e1e2, e1f1, e1d1, e1c1, e1b1, e1a1, h3h4, g2g3, f2f3, g2g4, f2f4\nmove: c2c7\npuzzle_id: DIC2c\nrating: 2083\nthemes: ['advancedPawn', 'discoveredCheck', 'doubleCheck', 'endgame', 'mate', 'mateIn5', 'promotion', 'sacrifice', 'veryLong']\nposition_index: 0\n\nposition_fen: r6r/1pp2kp1/p4Pp1/3P4/3Q4/2N2R2/PPP4q/4RK2 b - - 1 23\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8c8, h8b8, h8h7, h8h6, h8h5, h8h4, h8h3, a8g8, a8f8, a8e8, a8d8, a8c8, a8b8, a8a7, f7g8, f7f8, h2h7, h2h6, h2d6, h2h5, h2e5, h2h4, h2f4, h2h3, h2g3, h2g2, h2f2, h2e2, h2d2, h2c2, h2h1, h2g1, g7f6, c7c6, b7b6, g6g5, a6a5, c7c5, b7b5\nmove: h2h1\npuzzle_id: dJaOf\nrating: 2294\nthemes: ['advantage', 'deflection', 'discoveredAttack', 'fork', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 2","sha256":"a152a77c3f9030e8cf76b876476b4c2bbaf3e48e4f069099d8b8604e2ba7aceb","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/brs/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 2Q3k1/5pp1/7p/8/1P4q1/P7/1K1R4/8 b - - 0 39\nside_to_move: black\nlegal_moves_uci: g8h7, g4c8\nmove: g4c8\n\nposition_fen: 1r3k2/p3r3/2n1p2p/4Qp1q/2PP4/5P2/P4P1P/R5RK w - - 0 28\nside_to_move: white\nlegal_moves_uci: e5h8, e5b8, e5g7, e5c7, e5f6, e5e6, e5d6, e5f5, e5d5, e5c5, e5b5, e5a5, e5f4, e5e4, e5g3, e5e3, e5e2, e5e1, h1g2, g1g8, g1g7, g1g6, g1g5, g1g4, g1g3, g1g2, g1f1, g1e1, g1d1, g1c1, g1b1, a1f1, a1e1, a1d1, a1c1, a1b1, d4d5, c4c5, f3f4, h2h3, a2a3, h2h4, a2a4\nmove: e5h8\n\nposition_fen: 2krr3/ppp3p1/2n2pB1/3q2Pp/5P1P/bP3N2/P1P2Q2/1K1R3R b - - 0 22\nside_to_move: black\nlegal_moves_uci: e8h8, e8g8, e8f8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, d8d7, d8d6, c8b8, c8d7, c6b8, c6e7, c6e5, c6a5, c6d4, c6b4, d5g8, d5f7, d5d7, d5e6, d5d6, d5g5, d5f5, d5e5, d5c5, d5b5, d5a5, d5e4, d5d4, d5c4, d5f3, d5d3, d5b3, d5d2, d5d1, a3f8, a3e7, a3d6, a3c5, a3b4, a3b2, a3c1, f6g5, b7b6, a7a6, f6f5, b7b5, a7a5\nmove: d5d1\npuzzle_id: bIJLK\nrating: 896\nthemes: ['mate', 'mateIn2', 'middlegame', 'pillsburysMate', 'queensideAttack', 'short']\nposition_index: 0\n\nposition_fen: 8/pp6/2p1k3/1P1p2p1/2PP2Pp/3K3P/P7/8 b - - 0 36\nside_to_move: black\nlegal_moves_uci: e6f7, e6e7, e6d7, e6f6, e6d6, c6b5, d5c4, b7b6, a7a6, c6c5, a7a5\nmove: d5c4\npuzzle_id: E4Dcg\nrating: 2420\nthemes: ['attraction', 'crushing', 'endgame', 'pawnEndgame', 'quietMove', 'veryLong']\nposition_index: 0\n\nposition_fen: 2r4k/3bR1R1/p3p2P/1p6/8/P2r4/1P6/2K5 w - - 2 36\nside_to_move: white\nlegal_moves_uci: c1b1\nmove: c1b1\npuzzle_id: gWGN4\nrating: 2066\nthemes: ['crushing', 'endgame', 'quietMove', 'veryLong']\nposition_index: 1\n\nposition_fen: 6r1/R4Qpk/1p2B1p1/4q3/7n/7P/5PP1/2rR2K1 b - - 2 34\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8e8, g8d8, g8c8, g8b8, g8a8, h7h8, h7h6, e5b8, e5c7, e5f6, e5e6, e5d6, e5h5, e5g5, e5f5, e5d5, e5c5, e5b5, e5a5, e5f4, e5e4, e5d4, e5g3, e5e3, e5c3, e5h2, e5e2, e5b2, e5e1, e5a1, h4f5, h4f3, h4g2, c1c8, c1c7, c1c6, c1c5, c1c4, c1c3, c1c2, c1d1, c1b1, c1a1, g6g5, b6b5\nmove: c1d1\npuzzle_id: mPZrZ\nrating: 1134\nthemes: ['mate', 'mateIn2', 'middlegame', 'short']\nposition_index: 1\n\nposition_fen: 8/7P/8/8/4b3/2ppk2R/4p3/4K3 b - - 3 51\nside_to_move: black\nlegal_moves_uci: e3f4, e3d4, e4f3\nmove: e4f3\npuzzle_id: zckUH\nrating: 2086\nthemes: ['advancedPawn', 'endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 2\n\nposition_fen: 5R1r/pp4p1/4q2k/3nP1Np/8/8/PP4PP/5R1K w - - 3 27\nside_to_move: white\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, g5h7, g5f7, g5e6, g5e4, g5h3, g5f3, h1g1, f1f7, f1f6, f1f5, f1f4, f1f3, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: g5e6\npuzzle_id: 4uOji\nrating: 2195\nthemes: ['crushing', 'deflection', 'fork', 'master', 'middlegame', 'veryLong']\nposition_index: 3\n\nposition_fen: r4b1r/p5p1/1Rn5/k3p2p/4NB2/8/2P2P2/q4BK1 w - - 0 24\nside_to_move: white\nlegal_moves_uci: b6b8, b6b7, b6c6, b6a6, b6b5, b6b4, b6b3, b6b2, b6b1, f4h6, f4g5, f4e5, f4g3, f4e3, f4h2, f4d2, f4c1, e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4d2, g1h2, g1g2, g1h1, f2f3, c2c3, c2c4\nmove: b6a6\npuzzle_id: QNwRO\nrating: 2683\nthemes: ['discoveredCheck', 'doubleCheck', 'fork', 'mate', 'mateIn5', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: 8/6rk/1pn4b/p2p1P2/P1pP1qN1/2P4P/1P6/4R2K w - - 0 36\nside_to_move: white\nlegal_moves_uci: g4h6, g4f6, g4e5, g4e3, g4h2, g4f2, h1g2, h1g1, e1e8, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1g1, e1f1, e1d1, e1c1, e1b1, e1a1, f5f6, h3h4, b2b3, b2b4\nmove: g4f6\npuzzle_id: JlPo2\nrating: 2165\nthemes: ['arabianMate', 'mate', 'mateIn4', 'middlegame', 'sacrifice', 'veryLong']\nposition_index: 1\n\nposition_fen: 2r1r1k1/5pp1/4bn1p/3pq3/3npP2/PPBP3P/B5P1/2RQNRK1 b - f3 0 23\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8h7, e8f8, e8d8, e8e7, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, c8c4, c8c3, f6h7, f6d7, f6h5, f6g4, e6d7, e6f5, e6g4, e6h3, e5b8, e5c7, e5d6, e5h5, e5g5, e5f5, e5f4, d4c6, d4f5, d4b5, d4f3, d4b3, d4e2, d4c2, e4d3, g7g6, h6h5, e4e3, g7g5, e4f3\nmove: e4f3\npuzzle_id: 1qa15\nrating: 1854\nthemes: ['crushing', 'enPassant', 'middlegame', 'oneMove']\nposition_index: 0\n\nposition_fen: 4r3/p4pk1/1p4p1/2pPr1P1/2P1BR1P/1P6/P1nK4/4R3 b - - 8 38\nside_to_move: black\nlegal_moves_uci: e8h8, e8g8, e8f8, e8d8, e8c8, e8b8, e8a8, e8e7, e8e6, g7h8, g7g8, g7f8, g7h7, e5e7, e5e6, e5g5, e5f5, e5d5, e5e4, c2d4, c2b4, c2e3, c2a3, c2e1, c2a1, f7f6, a7a6, b6b5, f7f5, a7a5\nmove: c2e1\npuzzle_id: J3kos\nrating: 991\nthemes: ['crushing', 'endgame', 'master', 'pin', 'short']\nposition_index: 1\n\nposition_fen: 6k1/p1p2pp1/7p/8/5P2/6P1/PPP4P/1K1Rr3 b - - 4 26\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8h7, e1e8, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1h1, e1g1, e1f1, e1d1, g7g6, f7f6, c7c6, a7a6, h6h5, g7g5, f7f5, c7c5, a7a5\nmove: e1d1\npuzzle_id: X148Z\nrating: 532\nthemes: ['backRankMate', 'endgame', 'mate', 'mateIn2', 'rookEndgame', 'short']\nposition_index: 1\n\nposition_fen: 2k4r/ppp2p2/3bpq2/8/3P4/2P2Q2/PP3P1p/4RR1K b - - 0 24\nside_to_move: black\nlegal_moves_uci: h8g8, h8f8, h8e8, h8d8, h8h7, h8h6, h8h5, h8h4, h8h3, c8d8, c8b8, c8d7, f6d8, f6g7, f6e7, f6h6, f6g6, f6g5, f6f5, f6e5, f6h4, f6f4, f6d4, f6f3, d6f8, d6e7, d6e5, d6c5, d6f4, d6b4, d6g3, d6a3, c7c6, b7b6, a7a6, e6e5, c7c5, b7b5, a7a5\nmove: f6f3\npuzzle_id: e5nms\nrating: 473\nthemes: ['endgame', 'hangingPiece', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0\n\nposition_fen: 2R5/4Kp2/5Nkp/3pp3/3P2P1/4rn2/8/8 w - - 2 54\nside_to_move: white\nlegal_moves_uci: c8h8, c8g8, c8f8, c8e8, c8d8, c8b8, c8a8, c8c7, c8c6, c8c5, c8c4, c8c3, c8c2, c8c1, e7f8, e7e8, e7d8, e7d7, e7d6, f6g8, f6e8, f6h7, f6d7, f6h5, f6d5, f6e4, d4e5, g4g5\nmove: c8g8\npuzzle_id: 19jqO\nrating: 2569\nthemes: ['endgame', 'mate', 'mateIn4', 'veryLong']\nposition_index: 3\n\nposition_fen: r3r1k1/pp3ppp/2nb4/6Q1/P6B/2P2B1P/5PP1/4R1K1 b - - 0 21\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, e8f8, e8d8, e8c8, e8b8, e8e7, e8e6, e8e5, e8e4, e8e3, e8e2, e8e1, a8d8, a8c8, a8b8, d6f8, d6b8, d6e7, d6c7, d6e5, d6c5, d6f4, d6b4, d6g3, d6a3, d6h2, c6d8, c6b8, c6e7, c6e5, c6a5, c6d4, c6b4, h7h6, g7g6, f7f6, b7b6, a7a6, h7h5, f7f5, b7b5, a7a5\nmove: e8e1\npuzzle_id: 0BFEw\nrating: 636\nthemes: ['kingsideAttack', 'mate', 'mateIn2', 'middlegame', 'pillsburysMate', 'short']\nposition_index: 1","sha256":"b1dc41598c10842dfea05441c8d5f63d6d5f57e7c01710daa08e6cbae4996b5d","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/brs/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nposition_fen: 2k5/1p2bpp1/pP1p2p1/2pPP3/5P2/2N2Q1K/1P5R/R1B4q b - - 2 26\nside_to_move: black\nlegal_moves_uci: c8d8, c8b8, c8d7, e7f8, e7d8, e7f6, e7g5, e7h4, h1f3, h1h2, h1g2, h1g1, h1f1, h1e1, h1d1, h1c1, d6e5, f7f6, g6g5, a6a5, c5c4, f7f5\nmove: h1f3\n\nposition_fen: 6k1/4rpp1/p1qp4/8/2P3Q1/1P4P1/P2R1P1P/4R1K1 b - - 0 30\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8h7, e7e8, e7d7, e7c7, e7b7, e7a7, e7e6, e7e5, e7e4, e7e3, e7e2, e7e1, c6e8, c6c8, c6a8, c6d7, c6c7, c6b7, c6b6, c6d5, c6c5, c6b5, c6e4, c6c4, c6a4, c6f3, c6g2, c6h1, g7g6, f7f6, d6d5, a6a5, g7g5, f7f5\nmove: e7e1\npuzzle_id: cg7XX\nrating: 716\nthemes: ['endgame', 'mate', 'mateIn1', 'oneMove']\nposition_index: 0\n\nposition_fen: 3r4/1p2k3/pQ1p2p1/3P3n/P5pq/3P4/1P5P/5RK1 w - - 0 30\nside_to_move: white\nlegal_moves_uci: b6d8, b6c7, b6b7, b6a7, b6d6, b6c6, b6a6, b6c5, b6b5, b6a5, b6d4, b6b4, b6e3, b6b3, b6f2, g1g2, g1h1, f1f8, f1f7, f1f6, f1f5, f1f4, f1f3, f1f2, f1e1, f1d1, f1c1, f1b1, f1a1, a4a5, d3d4, h2h3, b2b3, b2b4\nmove: b6e3\npuzzle_id: tBJwL\nrating: 2342\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 0\n\nposition_fen: 6k1/8/p2QP2p/1p6/1Pp3KP/2P1q1P1/P4r2/3R4 b - - 0 44\nside_to_move: black\nlegal_moves_uci: g8h8, g8h7, g8g7, e3a7, e3e6, e3b6, e3g5, e3e5, e3c5, e3f4, e3e4, e3d4, e3g3, e3f3, e3d3, e3c3, e3e2, e3d2, e3e1, e3c1, f2f8, f2f7, f2f6, f2f5, f2f4, f2f3, f2h2, f2g2, f2e2, f2d2, f2c2, f2b2, f2a2, f2f1, h6h5, a6a5\nmove: e3e2\npuzzle_id: dx4XK\nrating: 2608\nthemes: ['attraction', 'endgame', 'mate', 'mateIn4', 'veryLong']\nposition_index: 2\n\nposition_fen: 5r1k/p5p1/R2P1p1p/2P4P/6n1/1B3R2/2P1Q2q/5K2 b - - 14 35\nside_to_move: black\nlegal_moves_uci: h8h7, f8g8, f8e8, f8d8, f8c8, f8b8, f8a8, f8f7, g4e5, g4e3, g4f2, h2d6, h2h5, h2e5, h2h4, h2f4, h2h3, h2g3, h2g2, h2f2, h2e2, h2h1, h2g1, g7g6, f6f5, g7g5\nmove: h2h1\npuzzle_id: afGJE\nrating: 1211\nthemes: ['mate', 'mateIn2', 'middlegame', 'short']\nposition_index: 1\n\nposition_fen: 7k/p4rpp/8/2pp4/2p1p1Q1/2q1P1P1/P4P1P/1r3RK1 w - - 0 26\nside_to_move: white\nlegal_moves_uci: g4c8, g4g7, g4d7, g4g6, g4e6, g4h5, g4g5, g4f5, g4h4, g4f4, g4e4, g4h3, g4f3, g4e2, g4d1, g1g2, g1h1, f1e1, f1d1, f1c1, f1b1, h2h3, f2f3, a2a3, h2h4, f2f4, a2a4\nmove: g4c8\npuzzle_id: WlWvK\nrating: 800\nthemes: ['endgame', 'mate', 'mateIn2', 'short']\nposition_index: 0\n\nposition_fen: 8/5p2/4pB2/3pP1nk/5Kp1/8/5P2/8 w - - 6 53\nside_to_move: white\nlegal_moves_uci: f6h8, f6d8, f6g7, f6e7, f6g5, f4g3, f4e3, f2f3\nmove: f6g5\npuzzle_id: RnlG6\nrating: 899\nthemes: ['crushing', 'endgame', 'master', 'short']\nposition_index: 0\n\nposition_fen: 1r3r1k/5ppB/p7/6P1/1p1p1qbQ/6N1/PPP5/2KR4 w - - 1 30\nside_to_move: white\nlegal_moves_uci: c1b1, d1d2\nmove: c1b1\npuzzle_id: 4dQTV\nrating: 2685\nthemes: ['crushing', 'middlegame', 'veryLong']\nposition_index: 2\n\nposition_fen: 2r3rk/ppp3p1/3p2Q1/4p3/1P4R1/P6P/6PK/2q5 w - - 2 36\nside_to_move: white\nlegal_moves_uci: g6e8, g6h7, g6g7, g6f7, g6h6, g6f6, g6e6, g6d6, g6h5, g6g5, g6f5, g6e4, g6d3, g6c2, g6b1, g4g5, g4h4, g4f4, g4e4, g4d4, g4c4, g4g3, h2g3, b4b5, h3h4, a3a4, g2g3\nmove: g4h4\npuzzle_id: 1dhKy\nrating: 2436\nthemes: ['endgame', 'mate', 'mateIn4', 'veryLong']\nposition_index: 1\n\nposition_fen: r1b2nkr/pp3qbp/2pp4/8/2BPN3/5P2/PPP1K3/6R1 w - - 0 23\nside_to_move: white\nlegal_moves_uci: e4f6, e4d6, e4g5, e4c5, e4g3, e4c3, e4f2, e4d2, c4f7, c4e6, c4a6, c4d5, c4b5, c4d3, c4b3, e2e3, e2d3, e2f2, e2d2, e2f1, e2e1, e2d1, g1g7, g1g6, g1g5, g1g4, g1g3, g1g2, g1h1, g1f1, g1e1, g1d1, g1c1, g1b1, g1a1, d4d5, f3f4, c2c3, b2b3, a2a3, b2b4, a2a4\nmove: e4f6\npuzzle_id: mko8t\nrating: 2670\nthemes: ['kingsideAttack', 'long', 'mate', 'mateIn3', 'middlegame', 'pin', 'sacrifice', 'smotheredMate']\nposition_index: 2\n\nposition_fen: 1r6/p2R1bk1/5p1p/P4p2/B3pN2/P7/2P2PPP/6K1 b - - 1 24\nside_to_move: black\nlegal_moves_uci: b8h8, b8g8, b8f8, b8e8, b8d8, b8c8, b8a8, b8b7, b8b6, b8b5, b8b4, b8b3, b8b2, b8b1, g7h8, g7g8, g7f8, g7h7, a7a6, h6h5, e4e3\nmove: b8b1\npuzzle_id: fXffx\nrating: 448\nthemes: ['backRankMate', 'endgame', 'mate', 'mateIn2', 'short']\nposition_index: 0\n\nposition_fen: 1k3r2/pp6/2p1N3/3pR3/3P4/6QP/Pq4PK/5r2 b - - 1 34\nside_to_move: black\nlegal_moves_uci: f8h8, f8g8, f8e8, f8d8, f8c8, f8f7, f8f6, f8f5, f8f4, f8f3, f8f2, b8c8, b8a8, b2b6, b2b5, b2d4, b2b4, b2c3, b2b3, b2a3, b2g2, b2f2, b2e2, b2d2, b2c2, b2a2, b2c1, b2b1, b2a1, f1f7, f1f6, f1f5, f1f4, f1f3, f1f2, f1h1, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, b7b6, a7a6, c6c5, b7b5, a7a5\nmove: b2f2\npuzzle_id: JxKAE\nrating: 2115\nthemes: ['advantage', 'long', 'middlegame']\nposition_index: 1\n\nposition_fen: 8/2k4p/p1pN1p2/2Pn1K2/1P3P1P/P3r1r1/8/2R1R3 b - - 1 40\nside_to_move: black\nlegal_moves_uci: c7d8, c7b8, c7d7, d5e7, d5b6, d5f4, d5b4, d5c3, g3g8, g3g7, g3g6, g3g5, g3g4, g3h3, g3f3, g3g2, g3g1, e3e8, e3e7, e3e6, e3e5, e3e4, e3f3, e3d3, e3c3, e3b3, e3a3, e3e2, e3e1, h7h6, a6a5, h7h5\nmove: d5e7\npuzzle_id: n776P\nrating: 2377\nthemes: ['endgame', 'mate', 'mateIn4', 'veryLong']\nposition_index: 0\n\nposition_fen: 6k1/6pp/8/Q2Pp3/4Pn2/P7/5PqP/3BK3 b - - 4 30\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8f7, f4g6, f4e6, f4h5, f4d5, f4h3, f4d3, f4e2, g2g6, g2g5, g2g4, g2e4, g2h3, g2g3, g2f3, g2h2, g2f2, g2h1, g2g1, g2f1, h7h6, g7g6, h7h5, g7g5\nmove: g2g1\npuzzle_id: ajhQg\nrating: 2434\nthemes: ['crushing', 'deflection', 'endgame', 'veryLong']\nposition_index: 2\n\nposition_fen: 6k1/p1p2pp1/7p/8/5P2/6P1/PPP4P/1K1Rr3 b - - 4 26\nside_to_move: black\nlegal_moves_uci: g8h8, g8f8, g8h7, e1e8, e1e7, e1e6, e1e5, e1e4, e1e3, e1e2, e1h1, e1g1, e1f1, e1d1, g7g6, f7f6, c7c6, a7a6, h6h5, g7g5, f7f5, c7c5, a7a5\nmove: e1d1\npuzzle_id: X148Z\nrating: 532\nthemes: ['backRankMate', 'endgame', 'mate', 'mateIn2', 'rookEndgame', 'short']\nposition_index: 1\n\nposition_fen: rn5k/ppp2Qp1/7p/8/3P2q1/2P4b/PP1N1P1K/R1B5 b - - 1 23\nside_to_move: black\nlegal_moves_uci: h8h7, b8d7, b8c6, b8a6, g4c8, g4d7, g4g6, g4e6, g4h5, g4g5, g4f5, g4h4, g4f4, g4e4, g4d4, g4g3, g4f3, g4g2, g4e2, g4g1, g4d1, h3g2, h3f1, g7g6, c7c6, b7b6, a7a6, h6h5, g7g5, c7c5, b7b5, a7a5\nmove: g4g2\npuzzle_id: RGTMs\nrating: 2066\nthemes: ['advancedPawn', 'attraction', 'kingsideAttack', 'mate', 'mateIn5', 'middlegame', 'promotion', 'sacrifice', 'veryLong']\nposition_index: 4","sha256":"3a65e396373f9a84f4089a3a3ea41e527ca53385405e79c49336d4e1aae84269","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/copro/42":{"text":"You are an expert chess grandmaster. Analyze the given chess position carefully. Identify whose turn it is, evaluate the tactical and strategic elements of the position (such as checks, captures, threats, pins, and forks), and calculate the forced winning line. Determine the single absolute best move for the active player. Provide your reasoning briefly, followed by the best move in Standard Algebraic Notation (e.g., Nf3, Bxh7+, O-O).","sha256":"19d29e11052604f45fbee46b9b3bf7529a035a8bf4b3959dee6ece7f66237118","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/copro/43":{"text":"Find the single best move for the active player in this chess puzzle. Provide only the move in standard Universal Chess Interface (UCI) format (e.g., e2e4). Do not include any explanation.","sha256":"f1cfd59afcc7149e527d83ef0a5c487a857167a13d1a535aea08f0e4a3108bc9","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/copro/44":{"text":"Solve the chess puzzle by finding the single best move.","sha256":"833fbfbcd25eeddbd449428d3d96c4c922a5027521a5e65c0e544870d19cc8ca","unchanged":true,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/gepa/42":{"text":"You are an expert chess engine and tactical analyst. Your task is to solve a chess puzzle by finding the single best tactical move from a list of legal moves.\n\n### Input Variables:\n- **`position_fen`**: The current position of the board in Forsyth-Edwards Notation (FEN).\n- **`side_to_move`**: The color of the player whose turn it is to move ('white' or 'black').\n- **`legal_moves_uci`**: A comma-separated list of all legally playable moves for the active side in Universal Chess Interface (UCI) notation.\n\n### Critical Tactical Checklist (Mental Protocol)\nBefore selecting your move, you must mentally execute the following analytical steps in order. Do not skip any step, even if a move looks immediately appealing.\n\n1. **Scan for Mate-in-1 (Highest Priority)**:\n   - Carefully examine the `legal_moves_uci` list. \n   - Check if any legal move immediately delivers checkmate (e.g., look for Queen and Bishop batteries targeting a weak king square like h2/h7/g2/g7/f2/f7).\n   - *Example Failure Avoidance*: Never play a centralizing or quiet move (like `e5d4`) if a direct checkmate (like `e5h2#`) is legally available.\n\n2. **Evaluate Forcing Sequences (Checks & Deflections)**:\n   - Identify all moves in `legal_moves_uci` that deliver a check.\n   - For every check, calculate the opponent's forced responses. If a check forces a sequence that leads to checkmate (e.g., a back-rank mate or a king hunt), **you must play it**.\n   - *Example Failure Avoidance*: Do not greedily capture an undefended piece (like playing `d5f3` to win a knight) if you have a forcing check (like `d5d1+`) that deflects the defender and leads to an immediate forced checkmate on the next move. Checkmate always supersedes material gain.\n\n3. **Analyze Crushing Sacrifices**:\n   - If there is no immediate mate or simple winning check, look for tactical sacrifices (such as sacrificing a rook or bishop via `Rxh3+` / `d3h3`) that completely destroy the opponent's king safety.\n   - Calculate the forced replies. If the sacrifice opens up the king's pawn shield and leads to an unstoppable mating net, prioritize it over passive or defensive moves (like `g1f2`).\n\n4. **Compare Candidates & Filter out \"Lazy\" Moves**:\n   - Do not choose a move simply because it is legal, safe, or captures a pawn/piece.\n   - Every puzzle has exactly *one* mathematically superior move that either wins the game immediately, forces mate, or wins decisive material. If your selected move does not achieve one of these, re-evaluate the other legal moves.\n\n### Output Format:\nYour response must strictly contain only the selected best move in the following format. Do not include any thinking, explanations, or extra characters.\n\n### move\n[insert_uci_move_here]","sha256":"535353768542a35cf84e333dc5cf582dd32ab15f5cd0440222b2a2a6c8d0209f","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/gepa/43":{"text":"To improve the assistant's performance and prevent the specific failure modes demonstrated in the examples, we need to refine the instructions. \n\n### Analysis of the Failure Patterns:\n1. **Missing Direct Mate-in-Two/Forcing Sequences (Example 3)**: The assistant chose a passive king retreat (`h7h8`) instead of calculating a simple, forcing checkmate sequence (`h6h5+` forcing `Kf4` followed by `Rf3#`).\n2. **Missing \"Quiet\" But Deadly Threat Moves (Example 2)**: The assistant played a random knight move (`f5e3`) instead of identifying a quiet, highly forcing move (`f5d4`) that creates dual, completely unstoppable mating threats (`Nxf3#` and `f6#`). \n3. **Displacing Crucial Defenders during Checks (Example 1)**: When faced with a check, the assistant played a blocking move (`f2c5`) that moved a vital defender away from its post, ruining its own mating threat (`Qxg1#`). The correct move (`g6g5`) blocked the check while maintaining the defender's position and the mate threat.\n\n---\n\n### New Instructions for the Assistant\n\n```markdown\nYou are an expert chess engine and tactical analyst. Your task is to solve a chess puzzle by finding the single best tactical move from a list of legal moves in a given position.\n\n### Inputs\n1. **position_fen**: The board state represented in Forsyth-Edwards Notation (FEN).\n2. **side_to_move","sha256":"152641a77ec667541eddf05710ea5f0721c556126fe3f9bd9b2c67a9e2957b56","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/gepa/44":{"text":"# Chess Tactic Solver Instructions\n\nYou are an expert chess engine and grandmaster-level tactician. Your task is to analyze a chess position and select the absolute best, most optimal move from a list of legal moves to solve a tactical puzzle.\n\n### Inputs Provided:\n1. **`position_fen`**: The board state represented in Forsyth-Edwards Notation (FEN).\n2. **`side_to_move`**: The color of the player whose turn it is (\"white\" or \"black\").\n3. **`legal_moves_uci`**: A list of all legal moves available for the current player in Universal Chess Interface (UCI) format (e.g., `e2e4`, `g8f6`).\n\n---\n\n### Tactical Evaluation Strategy (Step-by-Step)\n\nTo find the correct move, you must not just select any legal move, but calculate the move that solves the chess tactic (e.g., wins material, forces checkmate, or successfully defends against an imminent threat). Follow this systematic calculation process:\n\n1. **Parse the Position (FEN):**\n   * Identify the location of both kings, queens, and active pieces.\n   * Assess the safety of both kings. Is your king currently in check? Is the opponent's king exposed?\n\n2. **Calculate Forcing Moves First (CCT Rule):**\n   * **Checks:** Analyze all legal moves that put the opponent's king in check. Calculate the forced replies. Can you force a checkmate sequence?\n   * **Captures:** Look for hanging (undefended) pieces or favorable exchanges. (For example: If you can capture the opponent's Queen for free, do not play a passive king move).\n   * **Threats:** Look for moves that create major, unavoidable threats (e.g., threatening mate in one, forks, skewers, or double attacks).\n\n3. **Perform Lookahead Calculation:**\n   * Do not assume the opponent will make a mistake. For every candidate move you evaluate, calculate the opponent's *best possible reply*.\n   * Avoid passive or defensive moves (like moving the king to a \"safe\" square) unless there are absolutely no forcing tactical wins available, or if it is the only way to escape checkmate.\n\n4. **Verify Against the Legal Moves List:**\n   * Ensure your calculated best move is present in the `legal_moves_uci` list.\n\n---\n\n### Output Format\n\nOutput **only** the single best move in UCI format. Do not include any explanations, analysis, or extra text.\n\nExample Output:\ne2e4","sha256":"e5ad9fd0e6e57988969d9e89c1cc1c3c3853115e47828353f4705bf69623ce7c","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/miprov2/42":{"text":"Given the chess board position in FEN and the list of legal UCI moves, select the single best move that solves the tactical puzzle. Output only the selected legal UCI move, without any explanation, labels, or extra characters.\n\nposition_fen: 1nk3rr/2b2p2/4p3/8/3PBPpq/4P3/1B2Q1P1/R1R3K1 b - - 0 25\nside_to_move: black\nlegal_moves_uci: h8h7, h8h6, h8h5, g8f8, g8e8, g8d8, g8g7, g8g6, g8g5, c8d8, c8d7, b8d7, b8c6, b8a6, h4d8, h4h7, h4e7, h4h6, h4f6, h4h5, h4g5, h4h3, h4g3, h4h2, h4f2, h4h1, h4e1, f7f6, e6e5, g4g3, f7f5\nmove: h4h1\n\nposition_fen: 6k1/p1p5/1p2p3/2nr2p1/3B2r1/5R2/P1P3P1/5RK1 w - - 0 28\nside_to_move: white\nlegal_moves_uci: d4h8, d4g7, d4f6, d4e5, d4c5, d4e3, d4c3, d4f2, d4b2, d4a1, f3f8, f3f7, f3f6, f3f5, f3f4, f3h3, f3g3, f3e3, f3d3, f3c3, f3b3, f3a3, f3f2, g1h2, g1f2, g1h1, f1f2, f1e1, f1d1, f1c1, f1b1, f1a1, g2g3, c2c3, a2a3, c2c4, a2a4\nmove: f3f8\npuzzle_id: l7u9R\nrating: 2654\nthemes: ['endgame', 'exposedKing', 'mate', 'mateIn4', 'veryLong']\nposition_index: 0\n\nposition_fen: k5r1/1pQ1r2p/pP3b2/6p1/3pp3/7P/5PP1/R5K1 w - - 6 32\nside_to_move: white\nlegal_moves_uci: c7d8, c7c8, c7b8, c7e7, c7d7, c7b7, c7d6, c7c6, c7e5, c7c5, c7f4, c7c4, c7g3, c7c3, c7h2, c7c2, c7c1, g1h2, g1h1, g1f1, a1a6, a1a5, a1a4, a1a3, a1a2, a1f1, a1e1, a1d1, a1c1, a1b1, h3h4, g2g3, f2f3, g2g4, f2f4\nmove: a1a6\npuzzle_id: DIC2c\nrating: 2083\nthemes: ['advancedPawn', 'discoveredCheck', 'doubleCheck', 'endgame', 'mate', 'mateIn5', 'promotion', 'sacrifice', 'veryLong']\nposition_index: 2\n\nposition_fen: 5k2/5p1p/p2P2p1/1r6/1p6/8/P4PPP/2R3K1 w - - 0 31\nside_to_move: white\nlegal_moves_uci: g1h1, g1f1, c1c8, c1c7, c1c6, c1c5, c1c4, c1c3, c1c2, c1f1, c1e1, c1d1, c1b1, c1a1, d6d7, h2h3, g2g3, f2f3, a2a3, h2h4, g2g4, f2f4, a2a4\nmove: c1c8\npuzzle_id: 59UVk\nrating: 2371\nthemes: ['advancedPawn', 'attraction', 'crushing', 'endgame', 'rookEndgame', 'veryLong']\nposition_index: 3","sha256":"37d253d415b906d3d600a08e58737a2fc73a86fcc5ce94de26568be5ef45c5a7","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/miprov2/43":{"text":"Analyze the given chess board configuration (FEN) and identify the side to move. From the provided comma-separated list of legal UCI moves, select the single best strategic move that solves the puzzle. Respond with only this selected move, without any labels, explanations, or additional text.\n\nposition_fen: 1k1r1bnr/pbp1q2p/1p1p1pp1/1N1PnB2/Q1P5/5N2/PP3PPP/R1B1R1K1 b - - 1 13\nside_to_move: black\nlegal_moves_uci: g8h6, f8g7, f8h6, d8e8, d8c8, d8d7, b8a8, e7e8, e7g7, e7f7, e7d7, e7e6, b7c8, b7a8, b7c6, b7a6, b7d5, e5f7, e5d7, e5c6, e5g4, e5c4, e5f3, e5d3, g6f5, h7h6, c7c6, a7a6, g6g5, h7h5, c7c5, a7a5\nmove: e5f3\npuzzle_id: 7eNCM\nrating: 763\nthemes: ['advantage', 'discoveredAttack', 'kingsideAttack', 'opening', 'short']\nposition_index: 0\n\nposition_fen: 8/1pR5/p5kp/6p1/b7/5P1P/r1nR2PK/8 w - - 2 36\nside_to_move: white\nlegal_moves_uci: c7c8, c7h7, c7g7, c7f7, c7e7, c7d7, c7b7, c7c6, c7c5, c7c4, c7c3, c7c2, h2g3, h2h1, h2g1, d2d8, d2d7, d2d6, d2d5, d2d4, d2d3, d2f2, d2e2, d2c2, d2d1, h3h4, f3f4, g2g3, g2g4\nmove: d2d6\npuzzle_id: tUyWO\nrating: 2735\nthemes: ['endgame', 'mate', 'mateIn5', 'veryLong']\nposition_index: 0\n\nposition_fen: r3r1k1/1p2npB1/p1nR2p1/2R1P1Q1/4q1P1/8/5P2/6K1 w - - 0 32\nside_to_move: white\nlegal_moves_uci: g7h8, g7f8, g7h6, g7f6, d6d8, d6d7, d6g6, d6f6, d6e6, d6c6, d6d5, d6d4, d6d3, d6d2, d6d1, g5e7, g5h6, g5g6, g5f6, g5h5, g5f5, g5h4, g5f4, g5e3, g5d2, g5c1, c5c6, c5d5, c5b5, c5a5, c5c4, c5c3, c5c2, c5c1, g1h2, g1f1, e5e6, f2f3, f2f4\nmove: g7f6\npuzzle_id: LtP4r\nrating: 2707\nthemes: ['advantage', 'long', 'master', 'middlegame']\nposition_index: 1\n\nposition_fen: 3Q4/8/4Nrpk/2p4p/3p4/3P2PK/P7/3q4 w - - 10 50\nside_to_move: white\nlegal_moves_uci: d8h8, d8g8, d8f8, d8e8, d8c8, d8b8, d8a8, d8e7, d8d7, d8c7, d8f6, d8d6, d8b6, d8d5, d8a5, d8d4, e6f8, e6g7, e6c7, e6g5, e6c5, e6f4, e6d4, h3h4, h3h2, h3g2, g3g4, a2a3, a2a4\nmove: d8h8\npuzzle_id: yaCn7\nrating: 1871\nthemes: ['anastasiaMate', 'endgame', 'mate', 'mateIn2', 'pin', 'short']\nposition_index: 1","sha256":"fd81a42e3628d580ea828ce435f492e9db6debbb4aea9991ff688088b2ad6a6f","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/miprov2/44":{"text":"You are a chess Grandmaster analyzing a highly tactical position. Analyze the given FEN board state and the side to move to identify the single best move from the provided list of legal UCI moves. Your output must consist solely of this one optimal move (in SAN or UCI format) without any extra text, reasoning, or formatting.\n\nposition_fen: 3r3k/6pp/p7/q1p1p3/4P3/2PP1R1P/1P4P1/5R1K w - - 0 35\nside_to_move: white\nlegal_moves_uci: f3f8, f3f7, f3f6, f3f5, f3f4, f3g3, f3e3, f3f2, h1h2, h1g1, f1f2, f1g1, f1e1, f1d1, f1c1, f1b1, f1a1, h3h4, d3d4, c3c4, g2g3, b2b3, g2g4, b2b4\nmove: f3f8\n\nposition_fen: r1bRr1k1/pp3ppp/8/8/4pnP1/5P2/PPP4P/1K3B1R w - - 2 19\nside_to_move: white\nlegal_moves_uci: d8e8, d8c8, d8d7, d8d6, d8d5, d8d4, d8d3, d8d2, d8d1, h1g1, f1a6, f1b5, f1c4, f1h3, f1d3, f1g2, f1e2, b1c1, b1a1, f3e4, g4g5, h2h3, c2c3, b2b3, a2a3, h2h4, c2c4, b2b4, a2a4\nmove: d8e8\n\nposition_fen: 4r1k1/p1p5/8/2NRr1pp/2P1K3/1P6/P7/8 w - - 0 42\nside_to_move: white\nlegal_moves_uci: e4d4, e4f3, e4d3, d5e5\nmove: d5e5\n\nposition_fen: r1bq1rk1/1p1nBpp1/p2pp2p/8/8/2nB1N2/PPP2PPP/R2Q1RK1 w - - 0 13\nside_to_move: white\nlegal_moves_uci: e7f8, e7d8, e7f6, e7d6, e7g5, e7h4, f3g5, f3e5, f3h4, f3d4, f3d2, f3e1, d3h7, d3g6, d3a6, d3f5, d3b5, d3e4, d3c4, d3e2, g1h1, f1e1, d1e2, d1d2, d1e1, d1c1, d1b1, a1c1, a1b1, b2c3, h2h3, g2g3, b2b3, a2a3, h2h4, g2g4, b2b4, a2a4\nmove: d3h7\npuzzle_id: th4zQ\nrating: 2535\nthemes: ['advantage', 'discoveredAttack', 'master', 'opening', 'veryLong']\nposition_index: 1","sha256":"c488e78f018da8ff1629a9bd7a8e16331cd34b12993860ee921b20d795b967ad","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/simba/42":{"text":"Solve the chess puzzle by finding the single best move.\n\nWhen choosing the best move from the list of legal UCI moves, always analyze forcing moves first. If there is a checkmate in one (e.g., when the opponent's king is trapped on the back rank and your king blocks escape squares, as in FEN `1r6/8/6R1/4p3/8/5kP1/8/5K2 b`), prioritize playing the checking rook move (e.g., `b8b1`) over non-forcing moves like pawn advances (e.g., `e5e4`). Visualize the board layout to spot weaknesses in the king's safety.\n\nWhen evaluating legal moves, prioritize forcing checks that directly coordinate multiple pieces (such as a Queen and Knight) to create unstoppable mating nets. Carefully calculate the opponent's forced king replies: if a check (like `h4g3`) forces the king to squares (f1 or h1) where follow-up checks are immediate checkmates (e.g., supported by a knight on e4), prioritize that move over simpler captures (like `h4g5`) which do not lead to mate.\n\nposition_fen: 8/Pp4p1/8/1P1N4/4K1k1/2P5/6np/8 b - - 0 41\nside_to_move: black\nlegal_moves_uci: g4h5, g4g5, g4h4, g4h3, g4g3, g2h4, g2f4, g2e3, g2e1, g7g6, b7b6, h2h1q, h2h1r, h2h1b, h2h1n, g7g5\nmove: h2h1q","sha256":"dd03d078dcd0404ef258f142eed41300d1000a90ed71907d0f2b0bb9ad02aa3f","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/simba/43":{"text":"Solve the chess puzzle by finding the single best move.\n\nWhen analyzing the position, look closely at the FEN string's en passant target square field (e.g., 'f6' in 'w - f6'). If an en passant capture is legal (such as `e5f6`), evaluate it as a high-priority candidate move. En passant captures and other forcing tactical shots are frequently the solution to chess puzzles. Avoid passive moves (like `c2a4`) that ignore the immediate tactical tension or surrender initiative.\n\nWhen evaluating multiple candidate checking moves in tactical/mating positions, prioritize checks that bring additional pieces (like back-rank rooks) into the attack while keeping your already well-placed pieces (like a central queen restricting the enemy king) on their current active squares. Calculate the follow-up moves to ensure a forced checkmate (e.g., look for patterns like the kill box mate where a rook on the f-file supports a queen mating on the e-file).\n\nposition_fen: 5B2/1b3Qpk/p3p2q/1p2Pp2/3P4/7P/P4PP1/7K b - - 6 35\nside_to_move: black\nlegal_moves_uci: h7h8, b7c8, b7a8, b7c6, b7d5, b7e4, b7f3, b7g2, h6g6, h6f6, h6h5, h6g5, h6h4, h6f4, h6h3, h6e3, h6d2, h6c1, a6a5, f5f4, b5b4\nmove: h6h3","sha256":"85416c60499185ba5c73bf26e7993fc0e348fe99959f5656c56937fb3b2ccafd","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]},"prompt/qwen3-8-27b/simba/44":{"text":"Solve the chess puzzle by finding the single best move.\n\nWhen analyzing the position, look for alignments between the opponent's king and other high-value pieces (like the queen). If they are on the same file, rank, or diagonal, prioritize moves that exploit this alignment via pins or skewers (such as `e8b8` pinning the queen on b7). Avoid passive defensive moves when active, tactical counter-measures that win material or neutralize threats are available.\n\nposition_fen: r1b3k1/2p1nrp1/2p4p/1pq1P1N1/p7/R1PBP3/5PPP/3R2K1 w - - 0 26\nside_to_move: white\nlegal_moves_uci: g5h7, g5f7, g5e6, g5e4, g5h3, g5f3, d3h7, d3g6, d3f5, d3b5, d3e4, d3c4, d3e2, d3c2, d3f1, d3b1, a3a4, a3b3, a3a2, a3a1, g1h1, g1f1, d1d2, d1f1, d1e1, d1c1, d1b1, d1a1, e5e6, e3e4, c3c4, h2h3, g2g3, f2f3, h2h4, g2g4, f2f4\nmove: d3h7","sha256":"4871a2d20d47bbd3c959341716ced61b3146ef2a03445d168c53e57a02f1280f","unchanged":false,"condition_no_update":false,"trace":null,"whole_run_costs":null,"cost_gaps":[]}},"baseline_prompt":"Solve the chess puzzle by finding the single best move.","sources":{"prompts.csv":"ff55cdbfc5c4ec16605fc17b4b3f068d2c533a47aa6dc37df09951807e9c33d9","independent_positions.csv.gz":"190fa538d72effea839e4351f11bea1a8d0ec17159bb8cdf2815946d0d00703b"}}