{ "generatedBy": "tools/generate-chess-analysis.mjs", "engine": "Stockfish 18 Lite WASM", "depth": 20, "note": "cp = centipawns from the point of view of the side that played the move. Positive = better for that side.", "studies": [ { "id": "early-queen", "fen": "rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq - 0 2", "turn": "white", "rows": [ { "san": "Nf3", "uci": "g1f3", "cp": 39, "mate": null, "depth": 20, "pv": "g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 c8f5 e1g1 f8e7 f1e1 b8c6 b1c3 e4c3 b2c3 f5d3 d1d3 e8g8 d3f5", "fenAfter": "rnbqkbnr/pppp1ppp/8/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq - 1 2", "from": "g1", "to": "f3" }, { "san": "Nc3", "uci": "b1c3", "cp": 20, "mate": null, "depth": 20, "pv": "b8c6 g1f3 g8f6 d2d4 e5d4 f3d4 f8b4 d4c6 b7c6 f1d3 d7d5 e4d5 e8g8 e1g1 c6d5 c1g5 c7c6 d1f3 h7h6", "fenAfter": "rnbqkbnr/pppp1ppp/8/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq - 1 2", "from": "b1", "to": "c3" }, { "san": "Bc4", "uci": "f1c4", "cp": -2, "mate": null, "depth": 20, "pv": "g8f6 d2d3 c7c6 g1f3 d7d5 c4b3 a7a5 a2a4 f8d6 e4d5 c6d5 b1c3 d5d4 c3b5 e8g8 c1g5 h7h6 g5h4 c8g4 h2h3", "fenAfter": "rnbqkbnr/pppp1ppp/8/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq - 1 2", "from": "f1", "to": "c4" }, { "san": "Qh5", "uci": "d1h5", "cp": -29, "mate": null, "depth": 20, "pv": "d7d6 f1c4 g7g6 h5d1 g8f6 d2d3 f8g7 g1f3 e8g8 e1g1 c7c6 f1e1 b7b5 c4b3 b8a6 a2a4 a6c5 a4b5 c6b5 c2c3 a7a5", "fenAfter": "rnbqkbnr/pppp1ppp/8/4p2Q/4P3/8/PPPP1PPP/RNB1KBNR b KQkq - 1 2", "from": "d1", "to": "h5" }, { "san": "Qf3", "uci": "d1f3", "cp": -39, "mate": null, "depth": 20, "pv": "g8f6 f1c4 c7c6 b1c3 b7b5 c4b3 b5b4 c3a4 d7d5 d2d3 f8e7 g1e2 e8g8 h2h3 c8e6 c2c4 b4c3 b2c3 b8d7 e2g3 f8e8 e1g1 e7f8 c1g5", "fenAfter": "rnbqkbnr/pppp1ppp/8/4p3/4P3/5Q2/PPPP1PPP/RNB1KBNR b KQkq - 1 2", "from": "d1", "to": "f3" }, { "san": "Qg4", "uci": "d1g4", "cp": -69, "mate": null, "depth": 20, "pv": "g8f6 g4g3 d7d5 b1c3 f8d6 d2d3 e8g8 c1g5 c7c6 f1e2 c8e6 g1f3 b8d7 e1g1 d5d4 c3b1 f6h5 g3h4", "fenAfter": "rnbqkbnr/pppp1ppp/8/4p3/4P1Q1/8/PPPP1PPP/RNB1KBNR b KQkq - 1 2", "from": "d1", "to": "g4" } ], "positions": [ { "id": "open-game", "label": { "ja": "1.e4 e5 の直後（白番）", "en": "After 1.e4 e5 (White to move)" }, "line": [ "e4", "e5" ], "fen": "rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq - 0 2", "turn": "white", "rows": [ { "san": "Nf3", "uci": "g1f3", "cp": 39, "mate": null, "depth": 20, "pv": "g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 c8f5 e1g1 f8e7 f1e1 b8c6 b1c3 e4c3 b2c3 f5d3 d1d3 e8g8 d3f5", "fenAfter": "rnbqkbnr/pppp1ppp/8/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq - 1 2", "from": "g1", "to": "f3" }, { "san": "Nc3", "uci": "b1c3", "cp": 20, "mate": null, "depth": 20, "pv": "b8c6 g1f3 g8f6 d2d4 e5d4 f3d4 f8b4 d4c6 b7c6 f1d3 d7d5 e4d5 e8g8 e1g1 c6d5 c1g5 c7c6 d1f3 h7h6", "fenAfter": "rnbqkbnr/pppp1ppp/8/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq - 1 2", "from": "b1", "to": "c3" }, { "san": "Bc4", "uci": "f1c4", "cp": -2, "mate": null, "depth": 20, "pv": "g8f6 d2d3 c7c6 g1f3 d7d5 c4b3 a7a5 a2a4 f8d6 e4d5 c6d5 b1c3 d5d4 c3b5 e8g8 c1g5 h7h6 g5h4 c8g4 h2h3", "fenAfter": "rnbqkbnr/pppp1ppp/8/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq - 1 2", "from": "f1", "to": "c4" }, { "san": "Qh5", "uci": "d1h5", "cp": -29, "mate": null, "depth": 20, "pv": "d7d6 f1c4 g7g6 h5d1 g8f6 d2d3 f8g7 g1f3 e8g8 e1g1 c7c6 f1e1 b7b5 c4b3 b8a6 a2a4 a6c5 a4b5 c6b5 c2c3 a7a5", "fenAfter": "rnbqkbnr/pppp1ppp/8/4p2Q/4P3/8/PPPP1PPP/RNB1KBNR b KQkq - 1 2", "from": "d1", "to": "h5" }, { "san": "Qf3", "uci": "d1f3", "cp": -39, "mate": null, "depth": 20, "pv": "g8f6 f1c4 c7c6 b1c3 b7b5 c4b3 b5b4 c3a4 d7d5 d2d3 f8e7 g1e2 e8g8 h2h3 c8e6 c2c4 b4c3 b2c3 b8d7 e2g3 f8e8 e1g1 e7f8 c1g5", "fenAfter": "rnbqkbnr/pppp1ppp/8/4p3/4P3/5Q2/PPPP1PPP/RNB1KBNR b KQkq - 1 2", "from": "d1", "to": "f3" }, { "san": "Qg4", "uci": "d1g4", "cp": -69, "mate": null, "depth": 20, "pv": "g8f6 g4g3 d7d5 b1c3 f8d6 d2d3 e8g8 c1g5 c7c6 f1e2 c8e6 g1f3 b8d7 e1g1 d5d4 c3b1 f6h5 g3h4", "fenAfter": "rnbqkbnr/pppp1ppp/8/4p3/4P1Q1/8/PPPP1PPP/RNB1KBNR b KQkq - 1 2", "from": "d1", "to": "g4" } ], "engineBest": "Nf3", "engineBestCp": 34 }, { "id": "scholars-try", "label": { "ja": "3手目でクイーンを出す（白番）", "en": "The queen sortie on move 3 (White to move)" }, "line": [ "e4", "e5", "Bc4", "Nc6" ], "fen": "r1bqkbnr/pppp1ppp/2n5/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq - 2 3", "turn": "white", "rows": [ { "san": "Nf3", "uci": "g1f3", "cp": 28, "mate": null, "depth": 20, "pv": "g8f6 d2d3 f8c5 b1c3 d7d6 c3a4 c5b6 a4b6 a7b6 a2a4 e8g8 e1g1 h7h6 f1e1 c8e6 b2b3 e6c4 d3c4", "fenAfter": "r1bqkbnr/pppp1ppp/2n5/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq - 3 3", "from": "g1", "to": "f3" }, { "san": "d3", "uci": "d2d3", "cp": 26, "mate": null, "depth": 20, "pv": "g8f6 g1f3 f8c5 c2c3 e8g8 e1g1 d7d6 a2a4 a7a5 h2h3 c8e6 b1d2 h7h6 f1e1 e6c4 d2c4 f8e8 c1e3 b7b6 d1b3 c5e3 c4e3 c6e7 e1d1 e7g6", "fenAfter": "r1bqkbnr/pppp1ppp/2n5/4p3/2B1P3/3P4/PPP2PPP/RNBQK1NR b KQkq - 0 3", "from": "d2", "to": "d3" }, { "san": "Nc3", "uci": "b1c3", "cp": -4, "mate": null, "depth": 20, "pv": "g8f6 c4b3 f8c5 d2d3 d7d6 g1f3 h7h6 h2h3 a7a5 a2a4 c8e6 b3e6 f7e6 c3b5 e8g8 e1g1 d8e7 c2c3 c5b6 c1e3 b6e3 f2e3", "fenAfter": "r1bqkbnr/pppp1ppp/2n5/4p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR b KQkq - 3 3", "from": "b1", "to": "c3" }, { "san": "Qf3", "uci": "d1f3", "cp": -4, "mate": null, "depth": 20, "pv": "d8f6 g1e2 f6f3 g2f3 c6a5 c4b3 a5b3 a2b3 d7d6 d2d4 e5d4 e2d4 c8d7 b1c3 a7a6 c3d5", "fenAfter": "r1bqkbnr/pppp1ppp/2n5/4p3/2B1P3/5Q2/PPPP1PPP/RNB1K1NR b KQkq - 3 3", "from": "d1", "to": "f3" }, { "san": "Qh5", "uci": "d1h5", "cp": -31, "mate": null, "depth": 20, "pv": "g7g6 h5f3 g8f6 g1e2 d7d6 h2h3 f8g7 e1g1 e8g8 d2d3 c6a5 c4b3 c7c6 b1c3 b7b5 c1e3 f6d7 f3g3 b5b4 c3a4 a5b3 a2b3", "fenAfter": "r1bqkbnr/pppp1ppp/2n5/4p2Q/2B1P3/8/PPPP1PPP/RNB1K1NR b KQkq - 3 3", "from": "d1", "to": "h5" } ], "engineBest": "d3", "engineBestCp": 21 }, { "id": "black-side", "label": { "ja": "黒がクイーンを早く出す場合（黒番）", "en": "The same idea for Black (Black to move)" }, "line": [ "e4", "e5", "Nf3" ], "fen": "rnbqkbnr/pppp1ppp/8/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq - 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2 3", "from": "d8", "to": "e7" }, { "san": "Qf6", "uci": "d8f6", "cp": -107, "mate": null, "depth": 20, "pv": "b1c3 b8c6 c3d5 f6d8 d2d4 d7d6 f1b5 c8d7 e1g1 c6d4 b5d7 d8d7 f3d4 e5d4 d1d4 c7c6 d5e3 g8f6 f1e1 f8e7 e3f5 e8g8 c1g5 e7d8", "fenAfter": "rnb1kbnr/pppp1ppp/5q2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq - 2 3", "from": "d8", "to": "f6" }, { "san": "Qh4", "uci": "d8h4", "cp": -605, "mate": null, "depth": 20, "pv": "f3h4 d7d5 e4d5 f8e7 h4f3 e5e4 f3e5 g8f6 b1c3 b8d7 e5c4 d7b6 c4e3 e7c5 d5d6 c5e3 d2e3 c7d6 c3b5 c8g4 b5d6 e8f8 d1d4 f6d5", "fenAfter": "rnb1kbnr/pppp1ppp/8/4p3/4P2q/5N2/PPPP1PPP/RNBQKB1R w KQkq - 2 3", "from": "d8", "to": "h4" } ], "engineBest": "Nf6", "engineBestCp": -39 }, { "id": "queens-pawn", "label": { "ja": "1.d4 系でも同じか（白番）", "en": "Does it hold in a 1.d4 opening? (White to move)" }, "line": [ "d4", "d5", "Nf3", "Nf6" ], "fen": "rnbqkb1r/ppp1pppp/5n2/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq - 2 3", "turn": "white", "rows": [ { "san": "c4", "uci": "c2c4", "cp": 29, "mate": null, "depth": 20, "pv": "e7e6 g2g3 d5c4 f1g2 f8b4 c1d2 a7a5 d1c1 b8c6 c1c4 d8d5 c4d3 d5e4 d3e4 f6e4 a2a3 e4d2 b1d2", "fenAfter": "rnbqkb1r/ppp1pppp/5n2/3p4/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq - 0 3", "from": "c2", "to": "c4" }, { "san": "Bf4", "uci": "c1f4", "cp": 17, "mate": null, "depth": 20, "pv": "c7c5 d4c5 e7e6 b2b4 a7a5 c2c3 a5b4 f4b8 a8b8 c3b4 c8d7 a2a3 b7b6 c5b6 d8b6 e2e3 f6e4 f1e2", "fenAfter": "rnbqkb1r/ppp1pppp/5n2/3p4/3P1B2/5N2/PPP1PPPP/RN1QKB1R b KQkq - 3 3", "from": "c1", "to": "f4" }, { "san": "e3", "uci": "e2e3", "cp": 16, "mate": null, "depth": 20, "pv": "e7e6 f1e2 f8e7 e1g1 e8g8 c2c4 b7b6 b2b3 d5c4 e2c4 c8b7 c1b2 c7c5 b1c3 b8c6 d4c5 e7c5 d1b1 d8e7 c3e4", "fenAfter": "rnbqkb1r/ppp1pppp/5n2/3p4/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq - 0 3", "from": "e2", "to": "e3" }, { "san": "Qd3", "uci": "d1d3", "cp": -36, "mate": null, "depth": 20, "pv": "c7c5 e2e3 b8c6 f1e2 c5c4 d3d1 c8f5 e1g1 e7e6 b2b3 b7b5 a2a4 a7a6 f3e5 c6b4 b1a3 f6e4 a4b5 e4c3 d1d2 c3e2 d2e2 a6b5 c1b2", "fenAfter": "rnbqkb1r/ppp1pppp/5n2/3p4/3P4/3Q1N2/PPP1PPPP/RNB1KB1R b KQkq - 3 3", "from": "d1", "to": "d3" }, { "san": "Qd2", "uci": "d1d2", "cp": -38, "mate": null, "depth": 20, "pv": "c8f5 e2e3 e7e6 f1d3 f6e4 d2e2 f8d6 c2c4 c7c6 b1c3 b8d7 f3d2 d7f6 f2f3 e4c3 b2c3 d8a5 d3f5 e6f5 e1g1 a5c3", "fenAfter": "rnbqkb1r/ppp1pppp/5n2/3p4/3P4/5N2/PPPQPPPP/RNB1KB1R b KQkq - 3 3", "from": "d1", "to": "d2" } ], "engineBest": "c4", "engineBestCp": 38 } ] }, { "id": "knight-rim", "fen": "r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq - 2 3", "turn": "white", "rows": [ { "san": "Bb5", "uci": "f1b5", "cp": 42, "mate": null, "depth": 20, "pv": "a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5 b1d2 e8g8 d1e2 e6f5 d2e4 f5e4", "fenAfter": "r1bqkbnr/pppp1ppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq - 3 3", "from": "f1", "to": "b5" }, { "san": "Bc4", "uci": "f1c4", "cp": 28, "mate": null, "depth": 20, "pv": "g8f6 d2d3 f8c5 b1c3 d7d6 c3a4 c5b6 a4b6 a7b6 a2a4 e8g8 e1g1 h7h6 f1e1 c8e6 b2b3 e6c4 d3c4", "fenAfter": "r1bqkbnr/pppp1ppp/2n5/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq - 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0 6", "from": "b5", "to": "c6" }, { "san": "dxe5", "uci": "d4e5", "cp": 10, "mate": null, "depth": 20, "pv": "d6b5 a2a4 b5d4 f3d4 d7d5 d4c6 b7c6 b1d2 f8e7 d2b3 e8g8 c1e3 f7f6 e5f6 f8f6 e3g5 f6g6 g5e7 d8e7 f1e1 e7g5 e1e8 g8f7", "fenAfter": "r1bqkb1r/pppp1ppp/2nn4/1B2P3/8/5N2/PPP2PPP/RNBQ1RK1 b kq - 0 6", "from": "d4", "to": "e5" }, { "san": "Ba4", "uci": "b5a4", "cp": -3, "mate": null, "depth": 20, "pv": "e5d4 c2c3 f8e7 c3d4 b7b5 a4b3 e8g8 b1c3 c8b7 d4d5 c6a5 b3c2 b5b4 c3a4 f8e8 f1e1 e7f6 e1e8 d6e8 d1d3 g7g6 c1d2 d7d6 d2b4 c7c5", "fenAfter": "r1bqkb1r/pppp1ppp/2nn4/4p3/B2P4/5N2/PPP2PPP/RNBQ1RK1 b kq - 2 6", "from": "b5", "to": "a4" }, { "san": "Be2", "uci": "b5e2", "cp": -54, "mate": null, "depth": 20, "pv": "e5e4 f3e1 g7g6 c2c4 f8g7 e1c2 e8g8 b1c3 f7f5 f2f3 a7a5 c1e3 e4f3 e2f3 d6f7 f3d5 c6b4 c2b4 a5b4 c3b5 g8h8 d5f7 f8f7 d1d2 d7d6 e3g5 d8f8", "fenAfter": "r1bqkb1r/pppp1ppp/2nn4/4p3/3P4/5N2/PPP1BPPP/RNBQ1RK1 b kq - 2 6", "from": "b5", "to": "e2" }, { "san": "Re1", "uci": "f1e1", "cp": -92, "mate": null, "depth": 20, "pv": "d6b5 f3e5 f8e7 c1g5 b5d4 g5e7 c6e7 d1d4 e8g8 b1c3 d7d6 e5d3 e7f5 d4f4 h7h6 a1d1 a7a5 h2h3 c8d7 c3d5 d7e6 d5e3 d8g5 f4g5 h6g5 e3f5 e6f5 g2g4", "fenAfter": "r1bqkb1r/pppp1ppp/2nn4/1B2p3/3P4/5N2/PPP2PPP/RNBQR1K1 b kq - 2 6", "from": "f1", "to": "e1" } ], "engineBest": "Bxc6", "engineBestCp": 11 }, { "id": "nimzo", "label": { "ja": "自分のポーンを重ねる選択（白番）", "en": "Accepting doubled pawns yourself (White to move)" }, "line": [ "d4", "Nf6", "c4", "e6", "Nc3", "Bb4" ], "fen": "rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N5/PP2PPPP/R1BQKBNR w KQkq - 2 4", "turn": "white", "rows": [ { "san": "Nf3", "uci": "g1f3", "cp": 23, "mate": null, "depth": 20, "pv": "b7b6 e2e3 e8g8 f1d3 d7d5 c4d5 e6d5 c1d2 f8e8 f3e5 c8a6 d3a6 b8a6 d1f3 a8c8 a2a3 b4f8", "fenAfter": "rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq - 3 4", "from": "g1", "to": "f3" }, { "san": "Qc2", "uci": "d1c2", "cp": 19, "mate": null, "depth": 20, "pv": "d7d5 a2a3 b4c3 c2c3 d5c4 c3c4 b7b6 g1f3 c8a6 c4c2 b8d7 g2g3 a8c8 f1g2 e8g8 c2a4 a6b7 a4a7 b7d5 a7a6 c7c5 a6d3 c5d4 d3d4", "fenAfter": "rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N5/PPQ1PPPP/R1B1KBNR b KQkq - 3 4", "from": "d1", "to": "c2" }, { "san": "e3", "uci": "e2e3", "cp": 19, "mate": null, "depth": 20, "pv": "e8g8 g1f3 d7d5 f1d3 d5c4 d3c4 c7c5 e1g1 b7b6 d1e2 c8b7 a2a3 b4c3 b2c3 d8c7 c4d3 b7e4 c1b2 e4d3 e2d3 b8d7", "fenAfter": "rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR b KQkq - 0 4", "from": "e2", "to": "e3" }, { "san": "a3", "uci": "a2a3", "cp": 12, "mate": null, "depth": 20, "pv": "b4c3 b2c3 e8g8 e2e3 f8e8 g1e2 d7d5 e2g3 b7b6 c4d5 e6d5 f1d3 c8a6 e1g1 c7c5 d4c5 a6d3 d1d3 b6c5 c3c4 d5d4 e3d4 d8d4 d3d4 c5d4 c1g5", "fenAfter": "rnbqk2r/pppp1ppp/4pn2/8/1bPP4/P1N5/1P2PPPP/R1BQKBNR b KQkq - 0 4", "from": "a2", "to": "a3" }, { "san": "f3", "uci": "f2f3", "cp": -12, "mate": null, "depth": 20, "pv": "d7d5 a2a3 b4c3 b2c3 c7c5 c4d5 e6d5 e2e3 d8c7 e1f2 e8g8 f1d3 c8d7 g1e2 b8c6 a3a4 f8e8 a1b1 h7h6 c1a3", "fenAfter": "rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N2P2/PP2P1PP/R1BQKBNR b KQkq - 0 4", "from": "f2", "to": "f3" }, { "san": "Bg5", "uci": "c1g5", "cp": -18, "mate": null, "depth": 20, "pv": "c7c5 g1f3 h7h6 g5d2 e8g8 a2a3 b4c3 d2c3 f6e4 d1d3 e4c3 d3c3 b7b6 e2e3 d7d6 f1e2 c8b7 e1g1 d8e7 f1d1 f8d8 b2b4", "fenAfter": "rnbqk2r/pppp1ppp/4pn2/6B1/1bPP4/2N5/PP2PPPP/R2QKBNR b KQkq - 3 4", "from": "c1", "to": "g5" } ], "engineBest": "Nf3", "engineBestCp": 24 }, { "id": "exchange-french", "label": { "ja": "ポーンを重ねさせる交換（黒番）", "en": "A trade that doubles pawns (Black to move)" }, "line": [ "e4", "e6", "d4", "d5", "Nc3", "Nf6", "Bg5", "Bb4", "e5", "h6", "Bd2" ], "fen": "rnbqk2r/ppp2pp1/4pn1p/3pP3/1b1P4/2N5/PPPB1PPP/R2QKBNR b KQkq - 1 6", "turn": "black", "rows": [ { "san": "Bxc3", "uci": "b4c3", "cp": -45, "mate": null, "depth": 20, "pv": "b2c3 f6e4 d1g4 g7g6 h2h4 c7c5 f1d3 e4d2 e1d2 b8c6 h4h5 g6g5 f2f4 c5d4 c3d4 d8a5 d2e3 f7f5 g4g3 h8g8 g1e2 c8d7 f4g5 h6g5 h5h6", "fenAfter": "rnbqk2r/ppp2pp1/4pn1p/3pP3/3P4/2b5/PPPB1PPP/R2QKBNR w KQkq - 0 7", "from": "b4", "to": "c3" }, { "san": "Nfd7", "uci": "f6d7", "cp": -80, "mate": null, "depth": 20, "pv": "d1g4 b4f8 f1d3 c7c5 c3b5 c5d4 f2f4 b8c6 g1f3 h8g8 b2b4 d7b6 b5d4 c6d4 f3d4 b6c4 d3c4", "fenAfter": "rnbqk2r/pppn1pp1/4p2p/3pP3/1b1P4/2N5/PPPB1PPP/R2QKBNR w KQkq - 2 7", "from": "f6", "to": "d7" }, { "san": "Be7", "uci": "b4e7", "cp": -259, "mate": null, "depth": 20, "pv": "e5f6 e7f6 g1f3 e8g8 f1e2 c7c5 d4c5 e6e5 e1g1 b8c6 g1h1 c8f5 f3g1 f6e7 d2e1 d5d4 c3a4 b7b6 b2b4 e5e4 b4b5 d4d3 b5c6 d3e2 d1e2", "fenAfter": "rnbqk2r/ppp1bpp1/4pn1p/3pP3/3P4/2N5/PPPB1PPP/R2QKBNR w KQkq - 2 7", "from": "b4", "to": "e7" }, { "san": "c5", "uci": "c7c5", "cp": -315, "mate": null, "depth": 20, "pv": "e5f6 d8f6 a2a3 b4a5 c3b5 a5b6 b5d6 e8d7 d6c8 h8c8 d4c5 c8c5 g1f3 f6b2 f1d3 b8c6 e1g1 g7g5 d2e3 c5c3 a3a4 g5g4 e3b6 b2b6", "fenAfter": "rnbqk2r/pp3pp1/4pn1p/2ppP3/1b1P4/2N5/PPPB1PPP/R2QKBNR w KQkq - 0 7", "from": "c7", "to": "c5" } ], "engineBest": "Bxc3", "engineBestCp": -39 } ] }, { "id": "bishop-pair", "fen": "r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq - 4 6", "turn": "white", "rows": [ { "san": "d3", "uci": "d2d3", "cp": 35, "mate": null, "depth": 20, "pv": "b7b5 a4b3 e8g8 a2a4 c8b7 b1c3 c6a5 b3d5 b5b4 d5b7 a5b7 c3e2 d7d5 f3e5 d5e4 e5c6 d8d7 c6e7 d7e7 e2g3 e4d3 d1d3 f8e8 c1g5 h7h6 g3f5", "fenAfter": "r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/3P1N2/PPP2PPP/RNBQ1RK1 b kq - 0 6", "from": "d2", "to": "d3" }, { "san": "Re1", "uci": "f1e1", "cp": 31, "mate": null, "depth": 20, "pv": "b7b5 a4b3 e8g8 c2c3 c6a5 b3c2 d7d5 d2d4 d5e4 f3e5 c7c5 c1e3 c8b7 b1d2 d8d5 h2h3 e7d6 e5g4 f6g4 h3g4 c5d4 e3d4", "fenAfter": "r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQR1K1 b kq - 5 6", "from": "f1", "to": "e1" }, { "san": "Bxc6", "uci": "a4c6", "cp": 9, "mate": null, "depth": 20, "pv": "d7c6 d2d3 e7d6 b1d2 c8g4 h2h3 g4h5 d1e1 f6d7 g1h1 d7f8 f3g1 f8e6 f2f3 h5g6 d2c4 e8g8 c4d6 c7d6 g1e2", "fenAfter": "r1bqk2r/1pppbppp/p1B2n2/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 b kq - 0 6", "from": "a4", "to": "c6" }, { "san": "d4", "uci": "d2d4", "cp": 5, "mate": null, "depth": 20, "pv": "e5d4 f3d4 e8g8 d4f5 d7d5 e4d5 c8f5 d5c6 b7b5 a4b3 f5e4 f1e1 d8d1 e1d1 e7d6 c1e3 e4c6 b1d2 f8e8", "fenAfter": "r1bqk2r/1pppbppp/p1n2n2/4p3/B2PP3/5N2/PPP2PPP/RNBQ1RK1 b kq - 0 6", "from": "d2", "to": "d4" }, { "san": "c3", "uci": "c2c3", "cp": -35, "mate": null, "depth": 20, "pv": "f6e4 a4c6 d7c6 f3e5 e8g8 f1e1 e4f6 d2d3 f8e8 c1g5 h7h6 g5f4 f6d5 f4g3 f7f6 e5g6 c8f5 g6e7 e8e7 e1e7", "fenAfter": "r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/2P2N2/PP1P1PPP/RNBQ1RK1 b kq - 0 6", "from": "c2", "to": "c3" } ], "positions": [ { "id": "ruy", "label": { "ja": "ルイ・ロペスで交換するか（白番）", "en": "To trade or not, in the Ruy Lopez (White to move)" }, "line": [ "e4", "e5", "Nf3", "Nc6", "Bb5", "a6", "Ba4", "Nf6", "O-O", "Be7" ], "fen": "r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq - 4 6", "turn": "white", "rows": [ { "san": "d3", "uci": "d2d3", "cp": 35, "mate": null, "depth": 20, "pv": "b7b5 a4b3 e8g8 a2a4 c8b7 b1c3 c6a5 b3d5 b5b4 d5b7 a5b7 c3e2 d7d5 f3e5 d5e4 e5c6 d8d7 c6e7 d7e7 e2g3 e4d3 d1d3 f8e8 c1g5 h7h6 g3f5", "fenAfter": "r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/3P1N2/PPP2PPP/RNBQ1RK1 b kq - 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0 3", "from": "g2", "to": "g3" }, { "san": "Ne5", "uci": "f3e5", "cp": -22, "mate": null, "depth": 20, "pv": "e7e6 e2e3 f8d6 b2b3 c7c5 c1b2 c5d4 e3d4 b8c6 f1d3 d8c7 d1e2 c6b4 d3b5 c8d7 e5d7 f6d7 c2c4", "fenAfter": "rnbqkb1r/ppp1pppp/5n2/3pN3/3P4/8/PPP1PPPP/RNBQKB1R b KQkq - 3 3", "from": "f3", "to": "e5" } ], "engineBest": "c4", "engineBestCp": 38 }, { "id": "italian", "label": { "ja": "イタリアンでナイトを二度動かす（白番）", "en": "The same knight twice in the Italian (White to move)" }, "line": [ "e4", "e5", "Nf3", "Nc6", "Bc4", "Nf6" ], "fen": "r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq - 4 4", "turn": "white", "rows": [ { "san": "d3", "uci": "d2d3", "cp": 23, "mate": null, "depth": 20, "pv": "f8c5 c2c3 d7d6 e1g1 a7a6 a2a4 e8g8 b2b4 c5a7 f1e1 h7h6 h2h3 c8e6 b1d2 f6h5 c4a2 d8f6 d2f1 c6e7 d3d4 e7g6", "fenAfter": "r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R b KQkq - 0 4", "from": "d2", "to": "d3" }, { "san": "d4", "uci": "d2d4", "cp": 17, "mate": null, "depth": 20, "pv": "e5d4 e4e5 d7d5 c4b5 f6e4 f3d4 f8c5 c1e3 c8d7 b5c6 b7c6 e1g1 c5b6 b1d2 e4d2 d1d2 e8g8 f1e1 c6c5", "fenAfter": "r1bqkb1r/pppp1ppp/2n2n2/4p3/2BPP3/5N2/PPP2PPP/RNBQK2R b KQkq - 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3 5", "turn": "black", "rows": [ { "san": "Be7", "uci": "f8e7", "cp": -35, "mate": null, "depth": 20, "pv": "f1e1 b7b5 a4b3 e8g8 c2c3 c6a5 b3c2 d7d5 e4d5 e5e4 c2e4 f6e4 e1e4 f8e8 d2d4 c8b7 b1d2 d8d5 e4e5 d5c6 d4d5 c6d7 b2b4 a5c4 d2c4 b5c4 c1f4", "fenAfter": "r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq - 4 6", "from": "f8", "to": "e7" }, { "san": "Nxe4", "uci": "f6e4", "cp": -36, "mate": null, "depth": 20, "pv": "d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8e7 b1d2 e4c5 b3c2 d5d4 d2b3 d4d3 b3c5 d3c2 d1d8 a8d8 c5e6 f7e6 c1e3 e8g8 f1c1 f8f5", "fenAfter": "r1bqkb1r/1ppp1ppp/p1n5/4p3/B3n3/5N2/PPPP1PPP/RNBQ1RK1 w kq - 0 6", "from": "f6", "to": "e4" }, { "san": "b5", "uci": "b7b5", "cp": -44, "mate": null, "depth": 20, "pv": "a4b3 f8e7 d2d4 d7d6 d4e5 d6e5 d1d8 e7d8 a2a4 c8b7 a4b5 a6b5 a1a8 b7a8 b1a3 f6e4 a3b5 e4c5 b3a2 c5e6 a2e6 f7e6 c1e3", "fenAfter": "r1bqkb1r/2pp1ppp/p1n2n2/1p2p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq - 0 6", "from": "b7", "to": "b5" }, { "san": "d6", "uci": "d7d6", "cp": -46, "mate": null, "depth": 20, "pv": "f1e1 f8e7 c2c3 c8g4 h2h3 g4h5 d2d3 f6d7 d3d4 b7b5 a4b3 c6a5 b3c2 c7c5 d4d5 a5c4 b2b3 c4b6 b1d2 c5c4", "fenAfter": "r1bqkb1r/1pp2ppp/p1np1n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq - 0 6", "from": "d7", "to": "d6" }, { "san": "Nd4", "uci": "c6d4", "cp": -123, "mate": null, "depth": 20, "pv": "f3e5 b7b5 c2c3 d7d6 c3d4 d6e5 d4e5 f6g4 h2h3 b5a4 h3g4 d8d3 b1c3 f8c5 c3d5 e8g8 d1f3 d3f3 g2f3 c7c6 d5e3 f8d8 g1g2 a8b8 e3f5 c8e6", "fenAfter": "r1bqkb1r/1ppp1ppp/p4n2/4p3/B2nP3/5N2/PPPP1PPP/RNBQ1RK1 w kq - 4 6", "from": "c6", "to": "d4" } ], "engineBest": "Nxe4", "engineBestCp": -32 } ] }, { "id": "free-pawn", "fen": "r1bqkb1r/ppp2ppp/2n2n2/3Pp1N1/2B5/8/PPPP1PPP/RNBQK2R b KQkq - 0 5", "turn": "black", "rows": [ { "san": "Na5", "uci": "c6a5", "cp": -21, "mate": null, "depth": 20, "pv": "c4b5 c7c6 d5c6 b7c6 b5d3 f6d5 h2h4 d5f4 d3f1 d8d4 b1c3 c8g4 f2f3 g4h5 g2g4 h5g6", "fenAfter": "r1bqkb1r/ppp2ppp/5n2/n2Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq - 1 6", "from": "c6", "to": "a5" }, { "san": "b5", "uci": "b7b5", "cp": -48, "mate": null, "depth": 20, "pv": "c4f1 d8d5 b1c3 d5c5 f1b5 f8e7 b5c6 c5c6 d1f3 c8b7 f3c6 b7c6 e1g1 f6d5 c3d5 c6d5 d2d3 f7f6 g5e4 a7a5 a2a4 h7h5 b2b3 h5h4 h2h3 d5c6 c1d2 e8f7", "fenAfter": "r1bqkb1r/p1p2ppp/2n2n2/1p1Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq - 0 6", "from": "b7", "to": "b5" }, { "san": "Nd4", "uci": "c6d4", "cp": -54, "mate": null, "depth": 20, "pv": "c2c3 h7h6 g5f7 e8f7 c3d4 e5d4 e1g1 f8d6 d2d3 h8e8 b1d2 f7g8 h2h3 c8d7 d2f3", "fenAfter": "r1bqkb1r/ppp2ppp/5n2/3Pp1N1/2Bn4/8/PPPP1PPP/RNBQK2R w KQkq - 1 6", "from": "c6", "to": "d4" }, { "san": "Nxd5", "uci": "f6d5", "cp": -95, "mate": null, "depth": 20, "pv": "g5f7 e8f7 d1f3 f7e6 b1c3 c6b4 e1g1 c7c6 d2d4 d8f6 f3e2 e6d7 c3e4 f6g6 c2c3 b4a6 c4d3 d7c7 e4g5 e5e4 d3e4 c8f5 e4f5 g6f5 c3c4 d5f6", "fenAfter": "r1bqkb1r/ppp2ppp/2n5/3np1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq - 0 6", "from": "f6", "to": "d5" }, { "san": "h6", "uci": "h7h6", "cp": -206, "mate": null, "depth": 20, "pv": "g5f7 e8f7 d5c6 f7g6 e1g1 d8e8 c4e2 e8c6 d2d3 g6h7 b1d2 c6e6 e2f3 f8d6 b2b3 h8e8", "fenAfter": "r1bqkb1r/ppp2pp1/2n2n1p/3Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq - 0 6", "from": "h7", "to": "h6" }, { "san": "Be7", "uci": "f8e7", "cp": -387, "mate": null, "depth": 20, "pv": "d5c6 e8g8 d2d3 b7b5 c4b3 a7a5 a2a4 e7b4 c2c3 b4c5 a4b5 c8g4 f2f3 g4h5 d1e2 a5a4 b3d1 f6d5", "fenAfter": "r1bqk2r/ppp1bppp/2n2n2/3Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq - 1 6", "from": "f8", "to": "e7" } ], "positions": [ { "id": "fried-liver", "label": { "ja": "フライドリバーの分岐点（黒番）", "en": "The Fried Liver moment (Black to move)" }, "line": [ "e4", "e5", "Nf3", "Nc6", "Bc4", "Nf6", "Ng5", "d5", "exd5" ], "fen": "r1bqkb1r/ppp2ppp/2n2n2/3Pp1N1/2B5/8/PPPP1PPP/RNBQK2R b KQkq - 0 5", "turn": "black", "rows": [ { "san": "Na5", "uci": "c6a5", "cp": -21, "mate": null, "depth": 20, "pv": "c4b5 c7c6 d5c6 b7c6 b5d3 f6d5 h2h4 d5f4 d3f1 d8d4 b1c3 c8g4 f2f3 g4h5 g2g4 h5g6", "fenAfter": "r1bqkb1r/ppp2ppp/5n2/n2Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq - 1 6", "from": "c6", "to": "a5" }, { "san": "b5", "uci": "b7b5", "cp": -48, "mate": null, "depth": 20, "pv": "c4f1 d8d5 b1c3 d5c5 f1b5 f8e7 b5c6 c5c6 d1f3 c8b7 f3c6 b7c6 e1g1 f6d5 c3d5 c6d5 d2d3 f7f6 g5e4 a7a5 a2a4 h7h5 b2b3 h5h4 h2h3 d5c6 c1d2 e8f7", "fenAfter": "r1bqkb1r/p1p2ppp/2n2n2/1p1Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq - 0 6", "from": "b7", "to": "b5" }, { "san": "Nd4", "uci": "c6d4", "cp": -54, "mate": null, "depth": 20, "pv": "c2c3 h7h6 g5f7 e8f7 c3d4 e5d4 e1g1 f8d6 d2d3 h8e8 b1d2 f7g8 h2h3 c8d7 d2f3", "fenAfter": "r1bqkb1r/ppp2ppp/5n2/3Pp1N1/2Bn4/8/PPPP1PPP/RNBQK2R w KQkq - 1 6", "from": "c6", "to": "d4" }, { "san": "Nxd5", "uci": "f6d5", "cp": -95, "mate": null, "depth": 20, "pv": "g5f7 e8f7 d1f3 f7e6 b1c3 c6b4 e1g1 c7c6 d2d4 d8f6 f3e2 e6d7 c3e4 f6g6 c2c3 b4a6 c4d3 d7c7 e4g5 e5e4 d3e4 c8f5 e4f5 g6f5 c3c4 d5f6", "fenAfter": "r1bqkb1r/ppp2ppp/2n5/3np1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq - 0 6", "from": "f6", "to": "d5" }, { "san": "h6", "uci": "h7h6", "cp": -206, "mate": null, "depth": 20, "pv": "g5f7 e8f7 d5c6 f7g6 e1g1 d8e8 c4e2 e8c6 d2d3 g6h7 b1d2 c6e6 e2f3 f8d6 b2b3 h8e8", "fenAfter": "r1bqkb1r/ppp2pp1/2n2n1p/3Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq - 0 6", "from": "h7", "to": "h6" }, { "san": "Be7", "uci": "f8e7", "cp": -387, "mate": null, "depth": 20, "pv": "d5c6 e8g8 d2d3 b7b5 c4b3 a7a5 a2a4 e7b4 c2c3 b4c5 a4b5 c8g4 f2f3 g4h5 d1e2 a5a4 b3d1 f6d5", "fenAfter": "r1bqk2r/ppp1bppp/2n2n2/3Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq - 1 6", "from": "f8", "to": "e7" } ], "engineBest": "Na5", "engineBestCp": -19 }, { "id": "qga", "label": { "ja": "クイーンズギャンビットのポーン（黒番）", "en": "The Queen’s Gambit pawn (Black to move)" }, "line": [ "d4", "d5", "c4" ], "fen": "rnbqkbnr/ppp1pppp/8/3p4/2PP4/8/PP2PPPP/RNBQKBNR b KQkq - 0 2", "turn": "black", "rows": [ { "san": "e6", "uci": "e7e6", "cp": -32, "mate": null, "depth": 20, "pv": "b1c3 f8b4 c4d5 e6d5 c1f4 g8f6 e2e3 c8f5 d1a4 b8c6 f1b5 f5d7 g1e2 b4e7 b5c6 d7c6 a4c2", "fenAfter": "rnbqkbnr/ppp2ppp/4p3/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq - 0 3", "from": "e7", "to": "e6" }, { "san": "c6", "uci": "c7c6", "cp": -41, "mate": null, "depth": 20, "pv": "g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3 e7e6 f1c4 f8b4 e1g1 a7a5 d1e2 f6e4 c4d3 e4c3 b2c3 b4c3 a1b1 f5d3 e2d3 c3b4 c1a3 e8g8 a3b4", "fenAfter": "rnbqkbnr/pp2pppp/2p5/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq - 0 3", "from": "c7", "to": "c6" }, { "san": "dxc4", "uci": "d5c4", "cp": -43, "mate": null, "depth": 20, "pv": "g1f3 a7a6 e2e3 g8f6 f1c4 e7e6 e1g1 b7b5 c4d3 c7c5 a2a4 b5b4 f1e1 c8b7 b1d2 f8e7 e3e4 b8c6 d2b3 c6d4 f3d4 c5d4 e4e5 f6d5", "fenAfter": "rnbqkbnr/ppp1pppp/8/8/2pP4/8/PP2PPPP/RNBQKBNR w KQkq - 0 3", "from": "d5", "to": "c4" }, { "san": "e5", "uci": "e7e5", "cp": -54, "mate": null, "depth": 20, "pv": "d4e5 d5d4 g1f3 b8c6 b1d2 g8e7 d2b3 e7g6 f3d4 g6e5 e2e3 a7a5 f1e2 a5a4 d4c6 d8d1 e2d1 e5c6 b3d4 c8d7 c1d2 e8c8 d4c6 d7c6 f2f3 f8e7", "fenAfter": "rnbqkbnr/ppp2ppp/8/3pp3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq - 0 3", "from": "e7", "to": "e5" }, { "san": "Nf6", "uci": "g8f6", "cp": -77, "mate": null, "depth": 20, "pv": "c4d5 d8d5 b1c3 d5a5 g1f3 f6e4 e2e3 g7g6 d1b3 f8g7 f1d3 e4c3 c1d2 e8g8 b2c3 c7c5 h2h4 c8e6 b3b7 b8d7 f3g5 a8b8 b7a6 a5a6 d3a6", "fenAfter": "rnbqkb1r/ppp1pppp/5n2/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq - 1 3", "from": "g8", "to": "f6" } ], "engineBest": "e6", "engineBestCp": -32 }, { "id": "evans", "label": { "ja": "エバンス・ギャンビット（黒番）", "en": "The Evans Gambit (Black to move)" }, "line": [ "e4", "e5", "Nf3", "Nc6", "Bc4", "Bc5", "b4" ], "fen": "r1bqk1nr/pppp1ppp/2n5/2b1p3/1PB1P3/5N2/P1PP1PPP/RNBQK2R b KQkq - 0 4", "turn": "black", "rows": [ { "san": "Bxb4", "uci": "c5b4", "cp": 0, "mate": null, "depth": 20, "pv": "c2c3 b4e7 d2d4 c6a5 c4d3 d7d6 d4e5 d6e5 f3e5 g8f6 e1g1 e8g8 d1c2 d8d6 e5f3 f8d8 d3e2 d6c6 c1g5", "fenAfter": "r1bqk1nr/pppp1ppp/2n5/4p3/1bB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq - 0 5", "from": "c5", "to": "b4" }, { "san": "Be7", "uci": "c5e7", "cp": -21, "mate": null, "depth": 20, "pv": "e1g1 g8f6 d2d4 d7d6 b4b5 c6d4 f3d4 e5d4 d1d4 e8g8 b1c3 c8e6 a2a4 f6d7 c3d5 e6d5 d4d5", "fenAfter": "r1bqk1nr/ppppbppp/2n5/4p3/1PB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq - 1 5", "from": "c5", "to": "e7" }, { "san": "Bb6", "uci": "c5b6", "cp": -31, "mate": null, "depth": 20, "pv": "e1g1 d7d6 a2a4 a7a6 c2c3 g8f6 d2d3 e8g8 b1d2 h7h6 f1e1 c8e6 c4b3 f8e8 d2c4 b6a7 c1e3 a7e3 c4e3 d6d5", "fenAfter": "r1bqk1nr/pppp1ppp/1bn5/4p3/1PB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq - 1 5", "from": "c5", "to": "b6" }, { "san": "Nxb4", "uci": "c6b4", "cp": -45, "mate": null, "depth": 20, "pv": "c2c3 b4c6 d2d4 e5d4 c3d4 c5b4 b1d2 g8f6 d4d5 c6e7 e1g1 e8g8 e4e5 f6d5 d2e4 d5b6 f3g5 b6c4", "fenAfter": "r1bqk1nr/pppp1ppp/8/2b1p3/1nB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq - 0 5", "from": "c6", "to": "b4" }, { "san": "d5", "uci": "d7d5", "cp": -53, "mate": null, "depth": 20, "pv": "e4d5 c6b4 e1g1 b4d5 f3e5 g8e7 d2d4 c5b4 c2c3 b4d6 b1d2 c8e6 d1c2 e8g8 d2e4 a7a5 f1e1 a5a4 e4d6", "fenAfter": "r1bqk1nr/ppp2ppp/2n5/2bpp3/1PB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq - 0 5", "from": "d7", "to": "d5" } ], "engineBest": "Bxb4", "engineBestCp": 3 }, { "id": "poisoned", "label": { "ja": "「毒入りポーン」（黒番）", "en": "The poisoned pawn (Black to move)" }, "line": [ "e4", "c5", "Nf3", "d6", "d4", "cxd4", "Nxd4", "Nf6", "Nc3", "a6", "Bg5", "e6", "f4", "Qb6", "Qd2" ], "fen": "rnb1kb1r/1p3ppp/pq1ppn2/6B1/3NPP2/2N5/PPPQ2PP/R3KB1R b KQkq - 2 8", "turn": "black", "rows": [ { "san": "Qxb2", "uci": "b6b2", "cp": -40, "mate": null, "depth": 20, "pv": "a1b1 b2a3 g5f6 g7f6 f1e2 b8d7 e2h5 e8e7 e1g1 a3c5 h5e2 h7h5 g1h1 f8h6 d2d3 e7f8", "fenAfter": "rnb1kb1r/1p3ppp/p2ppn2/6B1/3NPP2/2N5/PqPQ2PP/R3KB1R w KQkq - 0 9", "from": "b6", "to": "b2" }, { "san": "Qc7", "uci": "b6c7", "cp": -63, "mate": null, "depth": 20, "pv": "g5f6 g7f6 e1c1 b8c6 d4c6 c7c6 h2h4 h7h5 h1h3 c6c7 h3d3 c8d7 f1e2 f8e7 g2g3 c7c5", "fenAfter": "rnb1kb1r/1pq2ppp/p2ppn2/6B1/3NPP2/2N5/PPPQ2PP/R3KB1R w KQkq - 3 9", "from": "b6", "to": "c7" }, { "san": "h6", "uci": "h7h6", "cp": -69, "mate": null, "depth": 20, "pv": "g5f6 g7f6 e1c1 b8c6 d4c6 b7c6 c3a4 b6c7 f1e2 f8e7 d2e3 c6c5 e3g3 c8b7 g3g7 h8f8 a4c3 e8c8 g7h6", "fenAfter": "rnb1kb1r/1p3pp1/pq1ppn1p/6B1/3NPP2/2N5/PPPQ2PP/R3KB1R w KQkq - 0 9", "from": "h7", "to": "h6" }, { "san": "Nbd7", "uci": "b8d7", "cp": -72, "mate": null, "depth": 20, "pv": "e1c1 f8e7 f1c4 d7c5 d2e1 c8d7 c1b1 h7h6 g5h4 f6e4 c3e4 e7h4 e4d6 b6d6 e1h4 d6e7 h4e1 e8g8 e1e5 b7b5 c4d5 a8d8 h1e1 e7f6 d5f3 f6e5 e1e5 d8c8 b2b3 d7e8 b1b2 b5b4 h2h4", "fenAfter": "r1b1kb1r/1p1n1ppp/pq1ppn2/6B1/3NPP2/2N5/PPPQ2PP/R3KB1R w KQkq - 3 9", "from": "b8", "to": "d7" }, { "san": "Be7", "uci": "f8e7", "cp": -129, "mate": null, "depth": 20, "pv": "e4e5 d6e5 f4e5 f6d5 c3d5 e6d5 g5e7 e8e7 d2g5 e7f8 e1c1 b8c6 e5e6 c8e6 d4e6 f7e6 f1e2 b6c7 e2h5 c6e5 c1b1", "fenAfter": "rnb1k2r/1p2bppp/pq1ppn2/6B1/3NPP2/2N5/PPPQ2PP/R3KB1R w KQkq - 3 9", "from": "f8", "to": "e7" } ], "engineBest": "Qxb2", "engineBestCp": -22 } ] } ] }