fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
2b1r1k1/3q3p/p2pN2Q/2pP1p2/2P3p1/1Pp4P/P4P2/1R4K1 b - - 1 31 | Qf7 | Is the move from d7 to c2 legal? | No | legality |
6k1/6pp/5p2/8/2n1PPPP/4K3/b2N4/8 w - - 1 32 | d6c4 | Is the White king in check? | Yes | check |
rn1qkbnr/ppp2ppp/4p3/5b2/2pP1B2/4P3/PP3PPP/RN1QKBNR w KQkq - 0 5 | e7e6 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r2qk3/pp2n3/2ppPpp1/6p1/2B5/7P/PP2QP1P/4R1K1 w q - 0 20 | b4 | What piece is on a5? | Empty | occupancy |
8/8/8/8/6qk/8/5q1K/8 w - - 6 66 | f3f2 | What is the material balance in this position? | Black is up 18 pawns of material | material |
r7/6pk/p6p/1p4P1/8/Pb6/1P1K2P1/8 w - - 0 41 | b7b5 | What is the material balance in this position? | Black is up 8 pawns of material | material |
5rk1/1q2bpp1/1r1p1n1p/p1p1p3/2P1P3/1PP1Q2P/P2N1PP1/R1B1K2R b KQ - 9 20 | Nh5 | What piece is on a1? | White Rook | occupancy |
r4rk1/pp2bp1p/4pp2/3q4/2n5/2Q1PN2/PP3PPP/2R2RK1 w - - 0 16 | Rfd1 | Is the move from h2 to h3 legal? | Yes | legality |
2k2b1r/pp3p1p/2n2p2/4p3/2P5/P2r4/1P2NPPP/RN2K2R b KQ - 0 12 | Na5 | Is the Black king in check? | No | check |
r2q1rk1/1pp2pp1/p2p1Nnp/8/2P5/1P2P2P/P3BPP1/R2Q1RK1 b - - 0 16 | e4f6 | Is the Black king in check? | Yes | check |
8/5p2/4b2k/3p4/PR1P3p/6K1/6R1/7r w - - 0 71 | Kf2 | Identify any White knight outposts on the board. | b5 | outposts |
6k1/ppp3pp/3r2p1/3nK3/P7/1Pbp4/8/7R w - - 0 43 | d4d3 | Is the White king in check? | Yes | check |
r7/ppkbn3/4p3/2qpP1Q1/8/P1pB4/2P3PP/R2K3R w - - 3 20 | Qh4 | Does White have any isolated pawns? | Yes: a3, c2, e5 | structure |
8/8/2b1k1p1/p1r1pp2/4P3/PPN3pP/1K2R1P1/8 b - - 1 42 | f4 | Is the White king in check? | No | check |
3r1k1r/1bq1b1p1/p3p2n/1p1p2Np/2p5/PnN1B2P/1P2QPP1/1B1RR1K1 b - - 1 24 | Qd7 | Is the White king in check? | No | check |
rnbqkb1r/pppn1ppp/4p3/3pP3/3P4/2P5/PP1N1PPP/R1BQKBNR b KQkq - 0 5 | c5 | What piece is on b5? | Empty | occupancy |
3k3r/p5R1/3p2p1/1p1P4/1P6/2Q5/P1Pn2q1/1K6 w - - 1 29 | c4d2 | Is the White king in check? | Yes | check |
r4rk1/pp4bp/1npq2p1/2N2p2/2Pp3P/1P3P2/P2QBP2/2KR3R w - - 0 19 | Nd3 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r3k2r/7p/p3p2b/1pp2p2/6p1/P2P2q1/BPPK4/R1BQR3 w kq - 2 23 | f8h6 | Is the White king in check? | Yes | check |
rn1q1rk1/pb3p1p/1p1p4/5R2/3b4/2N5/PPP1N1PP/R4QK1 w - - 0 15 | g7d4 | Is the Black king in check? | No | check |
r4r2/p1n1pkb1/2pp4/1p3BP1/2qP4/P1N1p3/1PQ2P2/2KR3R w - - 0 25 | b3 | Is the move from b2 to b3 legal? | Yes | legality |
1k2rbnr/pp1q2pp/3p4/1B1Nnb2/8/5N2/PP3PPP/R1BQK2R w KQ - 0 13 | Be2 | Is the move from e1 to e1 legal? | No | legality |
8/7R/3pkNpP/4p1P1/p1b4r/P1P5/2P5/3K4 w - - 1 82 | Rc7 | Does White have any passed pawns? | Yes: h6 | structure |
4k3/pR6/2n1p3/1P2P3/8/1n3P1P/1Br1K2P/8 w - - 5 33 | c1c2 | Is the White king in check? | Yes | check |
4R1k1/p4p1p/1ppr1p2/8/1PP5/P4B2/5PPP/6K1 b - - 1 31 | e1e8 | Is the Black king in check? | Yes | check |
6r1/q4k2/P2p4/2P1p3/4P3/2NP1nP1/2P2P2/R4RK1 w - - 2 32 | h4f3 | Is the White king in check? | Yes | check |
3B4/r7/4R1k1/6P1/8/2n5/2K1p3/8 b - - 1 74 | Kf5 | What piece is on c6? | Empty | occupancy |
6k1/p3Npbp/p4pp1/8/r3P3/5P2/1P3P1P/1R4K1 b - - 1 23 | d5e7 | Is the Black king in check? | Yes | check |
r1r5/5p1p/p3nk2/1ppR1P2/8/1PP1B3/1P5P/R4K2 b - - 2 29 | Rd8 | What piece is on f1? | White King | occupancy |
r1b1qrk1/ppp3pp/2npp3/5P1n/2PP3P/P1P2P2/5KP1/R1BQ1BNR b - - 0 11 | exf5 | Does Black have any isolated pawns? | No | structure |
r1bn1rk1/pp1nb1pp/1q2pP2/2pp4/3P1N2/2PB1N2/PPQ2PPP/R1B2RK1 b - - 0 12 | Nxf6 | Is the move from d7 to b8 legal? | Yes | legality |
3Q4/p4R1p/4r1p1/4k3/5q2/5P2/PP6/K7 w - - 3 36 | Qa5+ | Does Black have any passed pawns? | Yes: h7 | structure |
2k1r1r1/p2p2p1/1pP1p3/4P1P1/P1P5/4B3/5P1P/bq3KR1 w - - 1 26 | e4b1 | Is the White king in check? | Yes | check |
r3k2r/pppqn1pp/5p2/8/3P4/5N2/PP2QPPP/2R1R1K1 b kq - 3 16 | c6 | Is the d-file open, semi-open, or closed? | semi-open for Black | files |
r1b1k2r/1pqn1ppp/p2ppn2/2b5/3NPP2/P1NBB2P/1PP3P1/R2Q1R1K b kq - 0 12 | O-O | What piece is on d1? | White Queen | occupancy |
r1b2rk1/ppqn1pp1/2p2n1p/3p4/3P1b2/2N1PNP1/PP3PBP/R2Q1RK1 w - - 0 12 | gxf4 | Are there any open files in this position? | No | files |
1r2n1k1/5qb1/pr1p2Q1/2pPp1p1/2P3P1/2B2P2/RP2K3/7R w - - 0 36 | Rh8+ | Identify any White knight outposts on the board. | g4 | outposts |
4r1k1/qbpnppbp/1p3np1/1P1p4/1B1P4/4PN2/1QPNBPPP/5RK1 b - - 6 15 | Bf8 | Does Black have any passed pawns? | No | structure |
r7/ppp1qkpp/5n2/5b2/1bPQ4/5P2/PP2NKPP/RN3B1R b - - 2 13 | Bc5 | Identify any White knight outposts on the board. | e4 | outposts |
1n3k1r/5ppp/5b2/1p1B4/2p5/6P1/1P3P1P/2B1R1K1 b - - 0 20 | g5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r3kb1r/1b1p1ppp/p1q1pn2/1p6/4P3/P1NBB3/1PP2PPP/R2QR1K1 b kq - 2 11 | Be7 | Is the move from a8 to c8 legal? | Yes | legality |
3r2k1/5pq1/2r1p2p/2P3p1/Pn2R3/1P3R2/4Q1PP/1K6 b - - 0 39 | Nd5 | Does White have any passed pawns? | Yes: a4, b3, c5 | structure |
8/p7/4Nk2/2pP2p1/2Pb1p2/4pP1P/P7/3K4 b - - 1 39 | a5 | Does White have any passed pawns? | Yes: d5 | structure |
1k3r2/1p1qb3/p1n1p3/2p1P3/P2p4/1P1P2NP/1B1Q3K/3R4 b - - 2 29 | Nxe5 | Are there any open files in this position? | Yes: f, g | files |
br3rk1/2qn1pbp/p1npp1p1/p1p3B1/2P1P3/RNNP4/1P1QBPPP/R5K1 w - - 10 19 | Nxa5 | Is the move from g1 to h1 legal? | Yes | legality |
rnb1k1r1/pp2bpP1/4p2P/q2p4/6Q1/8/PpP1KP2/1R3BNR b q - 3 15 | Qxa2 | Does White have any passed pawns? | Yes: g7, h6 | structure |
4r1k1/1p4p1/pNR2p2/8/P4RP1/7P/1P2nP1K/8 b - - 0 37 | Nxf4 | What piece is on f4? | White Rook | occupancy |
2k2b1r/pp3p1p/2n2p2/4p3/2P5/P2r4/1P2NPPP/RN2K2R b KQ - 0 12 | Na5 | Is the c-file open, semi-open, or closed? | semi-open for Black | files |
q1r3k1/4b1p1/r3p1Qp/2ppP3/Pp6/4P2P/4NPP1/1R1R2K1 w - - 2 26 | Nf4 | Does White have any passed pawns? | Yes: a4 | structure |
8/p3k3/1p3p1p/4nB2/4NKPP/PP6/6b1/8 b - - 4 38 | Bxe4 | Is the f-file open, semi-open, or closed? | semi-open for White | files |
6k1/8/5K2/6P1/8/8/8/8 b - - 1 1 | Kh7 | What is the material balance in this position? | White is up 1 pawn of material | material |
r1bqk2r/pppp1ppp/8/3P4/2n1n3/2P2N2/P4PPP/R1BQ1RK1 w kq - 0 11 | Qd4 | Does White have any isolated pawns? | Yes: a2 | structure |
r4rk1/1bpnqppp/pp1b4/3p4/3Pn3/P2BPN2/NPQB1PPP/R4RK1 w - - 3 13 | Nc3 | Is the Black king in check? | No | check |
r1bq1rk1/3n1ppp/p3p3/3pP3/Np1Q1P1P/7R/PPP3P1/2KR1B2 b - - 0 15 | f6 | What piece is on e4? | Empty | occupancy |
rnbqkb1r/pppp2pp/5n2/4Np2/4P3/8/PPPP1PPP/RNBQKB1R w KQkq - 1 4 | exf5 | Is the move from h2 to h4 legal? | Yes | legality |
r1q3k1/2B1nrb1/p5pp/1pp5/8/2PB1N1P/bP2QPP1/3RR1K1 w - - 0 21 | Be4 | Is the move from g1 to d1 legal? | No | legality |
r1r1n1k1/pb1n2pp/1pq1pp2/8/1PP5/2Q1PN2/1B2BPPP/R2R2K1 w - - 0 17 | Bf1 | What piece is on h1? | Empty | occupancy |
r1b2Bk1/pp1p1pbp/n1p1qnp1/2P5/Q2P4/2N2N2/PP2P1PP/R3KB1R b KQ - 0 12 | Bxf8 | Are there any open files in this position? | No | files |
r2q1rk1/pp3pbp/2pp1np1/3Pp3/1nP1P1b1/2N2N2/PP3PPP/R1BQRBK1 w - - 1 11 | a3 | Is the move from d1 to d2 legal? | Yes | legality |
8/8/p3p1p1/1k2P3/1P3P2/2K5/8/8 b - - 3 13 | a5 | Is the move from g6 to g5 legal? | Yes | legality |
2bk4/3n2r1/pq2p3/3pP1P1/3R1N2/1P2Q3/2P5/2K5 b - - 0 31 | Ke8 | Does White have any isolated pawns? | Yes: e5, g5 | structure |
rnbqkbnr/1ppppppp/p7/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq - 0 2 | b5 | Does Black have any passed pawns? | No | structure |
8/pp4bk/7p/3P1p2/2P1n3/1P6/P4BP1/5NK1 w - - 1 35 | f6e4 | What is the material balance in this position? | White is up 1 pawn of material | material |
5rrk/3Q4/3p2p1/2p4n/P1PpPP2/3P1RbP/6P1/R1Bq3K w - - 5 31 | c2d1 | Is the White king in check? | Yes | check |
6k1/8/8/8/3BbKPP/8/8/8 b - - 2 6 | Bb1 | Identify any Black knight outposts on the board. | None | outposts |
7R/8/8/PP3pk1/K6p/8/8/4r3 w - - 1 54 | a6 | Are there any open files in this position? | Yes: c, d, e, g | files |
rn3rk1/p1p3pp/1p1b1N1n/2q1p3/2P5/1Q3B1P/PP1P1PP1/R1B1K2R b KQ - 0 12 | d5f6 | Is the Black king in check? | Yes | check |
8/4kp1p/5p2/8/P1B5/1P3K2/r4PP1/8 w - - 7 30 | g4 | What piece is on e7? | Black King | occupancy |
r1bq1rk1/p1n2pb1/1p1p1npp/2pP4/4P2B/P1N5/1P1NBPPP/R2QK2R b KQ - 0 13 | b5 | Is the c-file open, semi-open, or closed? | semi-open for White | files |
r3r1k1/3b1pn1/2p3pp/pp1pP3/3P1PPP/2PB4/P2KN3/5RR1 w - - 0 24 | f5 | Does White have any isolated pawns? | Yes: a2 | structure |
r3kb1r/2qnpppp/b1p2n2/1pPp4/1p1P4/P1N1PN2/3B1PPP/2RQKB1R w Kkq - 0 11 | axb4 | Are there any open files in this position? | No | files |
r3r1k1/3n1pb1/p2p2p1/P2P3p/1NB1p3/5P2/1P4PP/1K1RR3 w - - 1 24 | Nc6 | Are there any open files in this position? | Yes: c | files |
rnbq1rk1/ppp1bppp/4pn2/3p4/2P5/5NP1/PP1PPPBP/RNBQ1RK1 w - - 5 6 | d4 | Identify any Black knight outposts on the board. | None | outposts |
rn3q1Q/pb2rkp1/1p6/2ppp3/3P3P/2N3R1/PPP2PP1/R3K3 w Q - 0 23 | Rf3+ | Is the move from f2 to f3 legal? | Yes | legality |
5k2/Q5p1/b7/5P2/1p2K3/1P2RB2/7q/8 b - - 4 49 | Qh4+ | Identify any White knight outposts on the board. | e6, g6 | outposts |
r1bqr1k1/1pp2pb1/3p2pp/1P3n2/2P5/2NP1NP1/5PBP/1RQ2RK1 b - - 2 18 | c5 | Does White have any passed pawns? | No | structure |
r2r2k1/p3qp2/1p2pn2/2p1P1B1/3n4/P7/1PQ2PPP/3RKR2 w - - 0 19 | Qc3 | Is the move from g5 to e8 legal? | No | legality |
5rk1/p2n1ppp/1p2p3/3pP3/PPr2P2/2P5/6PP/2RBK2R w K - 0 22 | Rf1 | Is the Black king in check? | No | check |
8/2k3p1/1p1n1p2/3P1P1P/Pp3P2/8/2K5/1B6 b - - 1 122 | Nc4 | What piece is on h6? | Empty | occupancy |
r1bR4/p5kp/2p3p1/2p5/6P1/2P2Q1P/P4P2/4r1K1 w - - 1 2 | Kh2 | Is the White king in check? | Yes | check |
8/pp1n1p1k/3P1P1b/4R3/8/6PP/P5K1/8 w - - 3 42 | Re7 | What piece is on e1? | Empty | occupancy |
2rq1rk1/Qp2pp1p/3pbnpR/8/2P1P3/2N2P2/PP4P1/2KR1B2 b - - 0 15 | Bxc4 | Is the move from e6 to d7 legal? | Yes | legality |
8/3R2k1/4p1bp/7P/1p6/3ppPK1/1P6/8 b - - 3 47 | Kg8 | What piece is on h3? | Empty | occupancy |
rnbqkb1r/pp1p1ppp/4pn2/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq - 1 4 | Bd3 | Is the f-file open, semi-open, or closed? | closed | files |
8/8/1p1R4/p2k2r1/6p1/3P2N1/PP6/1K6 b - - 0 41 | h6d6 | Is the Black king in check? | Yes | check |
r2q1rk1/pp1nbpp1/5np1/3pp3/3P4/PQ1BPPP1/1P1N3P/R1B2RK1 b - - 1 14 | Qc8 | Identify any Black knight outposts on the board. | None | outposts |
6k1/Qp6/4p3/PP1p3K/5q2/2r5/R2N2PP/8 b - - 0 35 | Qxh2+ | Identify any White knight outposts on the board. | b6 | outposts |
4brk1/1p1R4/1qp1N1p1/p3Pp1p/1bP2P1P/1P4P1/P5BK/3Q4 b - - 0 26 | Bxd7 | Identify any Black knight outposts on the board. | None | outposts |
4Q1k1/2p2p2/pb3p2/1P6/7p/3P4/PP1K1P2/6q1 b - - 1 35 | e2e8 | Is the Black king in check? | Yes | check |
8/8/2R1rk1b/4p2P/4P1K1/5P2/6P1/8 w - - 18 58 | Rc8 | Is the move from g2 to h4 legal? | No | legality |
r1bq1k1r/pp1p2pp/2nN4/4Pp2/3p1B2/5N2/PPP2KPP/R4B1R b - - 1 12 | Qb6 | What piece is on f5? | Black Pawn | occupancy |
1k1R4/7p/p4N2/2p2p2/r1Pn4/7P/5PB1/6K1 b - - 0 48 | d7d8 | Is the Black king in check? | Yes | check |
8/6pk/8/3Qbq1P/5P2/4B1p1/p1p5/5K2 w - - 0 68 | Qxa2 | Does White have any passed pawns? | No | structure |
2b1rBnk/5p2/r1pp1Np1/pq6/2NPP3/2n2P1P/1P4P1/1BQ1R1K1 w - - 2 28 | Nxe8 | Is the a-file open, semi-open, or closed? | semi-open for White | files |
rn1qkb1r/pp3pp1/4p1P1/2Pp4/6pP/2N2n2/PPP1NK2/R1BQ1B1R w kq - 0 13 | Nf4 | Does White have any isolated pawns? | No | structure |
r2q1rk1/1pp2pp1/2b1pn1p/p7/Pb1P4/4PNP1/1P1NQPBP/R1R3K1 b - - 3 15 | Qe7 | Identify any White knight outposts on the board. | None | outposts |
r4rk1/5pp1/n1b1p2p/p1q5/pnN1P3/4N1P1/1P1Q1PBP/2RR2K1 w - - 0 21 | Nd6 | Does Black have any isolated pawns? | Yes: a4, a5 | structure |
r1bqkb1r/pp3p1p/2np1p2/1N2p3/4P3/8/PPP2PPP/RN1QKB1R w KQkq - 0 9 | Nd2 | What piece is on f1? | White Bishop | occupancy |
8/3k4/p3p3/bpPpP1N1/3P2P1/r4PK1/8/7R w - - 0 36 | a2a3 | What is the material balance in this position? | White is up 1 pawn of material | material |
2r1n1k1/1p1q3p/p3NrpQ/3p4/6P1/P1P5/1P2RP1P/4R1K1 w - - 1 29 | Ng5 | Is the move from h6 to h4 legal? | Yes | legality |
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