fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
r1b1r1k1/ppqn1pbp/2p2np1/6P1/N1P1pP2/2B1N2P/PP4B1/2QR1RK1 b - - 0 23 | b5 | Is the move from b7 to b6 legal? | Yes | legality |
3r2k1/2q2pp1/p3b3/3np2N/6P1/2P4P/P4RK1/1R2Q3 b - - 0 27 | Nxc3 | Is the e-file open, semi-open, or closed? | semi-open for White | files |
r5k1/1b4p1/p2q3p/3pN3/2pQnP2/2P5/PP4PP/4RR1K b - - 6 27 | a1e1 | What is the material balance in this position? | White is up 3 pawns of material | material |
8/5nkp/Q5p1/3PbbP1/pP5P/2rn4/B4P2/5RK1 w - - 3 39 | Qxa4 | Identify any White knight outposts on the board. | a5, c5, c6, e6 | outposts |
1r3rk1/5p1p/6p1/3p3N/Bn6/1P1qB1Q1/1P4PP/K1R5 b - - 1 30 | Rfc8 | What is the material balance in this position? | White is up 1 pawn of material | material |
1k1r1bnr/1b1q1p2/1n2p2p/p1ppP2P/1P1P1B2/3BNN2/PP1Q2P1/1KR4R b - - 0 21 | c4 | What piece is on h3? | Empty | occupancy |
N6r/pp1kppbp/2np1np1/8/2q5/8/PP2NPPP/R1BQ1RK1 w - - 0 14 | Nb6+ | Is the move from h2 to h3 legal? | Yes | legality |
1rn3k1/6p1/p2p3p/2p5/1bP5/1P1p4/P1K5/8 w - - 0 42 | e4d3 | Is the White king in check? | Yes | check |
6k1/7p/4p1q1/2p1b1PN/4P3/1Ppb3Q/8/r1BK2RR b - - 4 29 | Qxh5+ | Is the move from e6 to a1 legal? | No | legality |
r4rk1/pb1p1pb1/4p1p1/5q1p/3PNP1P/2PN1Q2/1P4P1/R3K1R1 w Q - 1 23 | Ndc5 | Does Black have any isolated pawns? | Yes: a7 | structure |
r2q1rk1/ppp2ppp/2nb4/3pp2b/4P1P1/3P1N2/PPPN1PB1/R1BQ1RK1 b - - 0 10 | h3g4 | What is the material balance in this position? | White is up 2 pawns of material | material |
8/2p2pk1/8/5Q2/1PP5/P4P2/4r2P/6rK w - - 0 35 | g6g1 | Is the White king in check? | Yes | check |
1r2kb1r/p1qn1pp1/2p1pnb1/P1Pp4/1B1P4/1Q2PPN1/NP5P/R3KB1R w KQk - 1 18 | Qa3 | Does Black have any isolated pawns? | Yes: a7 | structure |
r2q1rk1/1ppnbppp/p1b1pn2/6B1/P1QP4/5NP1/1P2PPBP/RN3RK1 w - - 3 11 | Rc1 | Is the Black king in check? | No | check |
r3r1k1/1b2q2R/pp1b1pP1/8/2pP4/4Pp2/PPQ2P2/2K3R1 w - - 2 25 | Qf5 | Is the move from c2 to e2 legal? | Yes | legality |
3nk3/5ppp/3p3b/1P1NpQ2/2B1P2P/q7/2r2PP1/5RK1 w - - 5 32 | Qxh7 | Is the Black king in check? | No | check |
rn1q1k2/p1ppp1br/1p3nQB/8/3P4/3B1N2/PPP2P1P/RN2K2b w Q - 0 11 | Ng5 | What piece is on a5? | Empty | occupancy |
r3r1k1/3qbpp1/4b2p/8/1PpP4/2N2NP1/4QPP1/1R1R2K1 b - - 5 24 | Ra3 | Is the move from a8 to h6 legal? | No | legality |
7r/p1NR1kpp/1p2nb2/8/5Q2/5N2/PP3PPP/4K2R b K - 0 24 | d1d7 | What is the material balance in this position? | White is up 15 pawns of material | material |
r2qk2r/1p1bb2p/p2p1p2/2pPp1p1/4Q1P1/2P1P3/PP1N3P/R3KBNR w KQkq - 1 16 | f8e7 | What is the material balance in this position? | White is up 2 pawns of material | material |
4kr2/2qn1p1p/p2pp3/6P1/2p1b3/1NQ5/P1P3PP/1K1R1B2 b - - 0 21 | d5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
5k2/5p2/6p1/B6p/P7/3K2P1/1b5P/8 w - - 1 39 | Bb6 | What piece is on b2? | Black Bishop | occupancy |
r2rb1k1/p1R2ppp/B3pn2/4n3/3NP3/4BP2/1P1b2PP/3Q2K1 b - - 0 20 | Bxe3+ | Is the move from a8 to g1 legal? | No | legality |
8/5npk/p1p2r2/1p6/2P2R2/1P3PB1/P2K3P/8 b - - 6 44 | Kg6 | What piece is on g7? | Black Pawn | occupancy |
N2k1bnr/pp2pppp/8/1B1P1b2/1n6/5P2/PP4PP/R1B1K2R w KQ - 3 14 | Bf4 | Does White have any passed pawns? | No | structure |
rnb1kbnr/pp3ppp/2p5/q3P3/2PpN3/8/PP2PPPP/R1BQKBNR w KQkq - 2 6 | Bd2 | What piece is on f3? | Empty | occupancy |
rnb1k2r/1p1p1p1p/p3pQ2/2pP4/4P3/2N5/P1P1BPPP/1Nq1K2R w Kkq - 1 12 | Bd1 | Identify any Black knight outposts on the board. | None | outposts |
2k4r/ppp2p1p/3r4/3P2p1/2P1p1P1/4Bq2/PPQ2P1K/RN2R3 w - - 0 19 | Bxg5 | Is the d-file open, semi-open, or closed? | semi-open for Black | files |
1rqr2k1/4bpp1/2npbn1p/p1p1p3/PpB1P3/2PPBNNP/1P2QPP1/R3R1K1 w - - 4 19 | Bxe6 | Is the move from e3 to g7 legal? | No | legality |
4r1k1/6p1/p1bp4/1r2pp2/2p2P1b/P1P3NP/1P3NP1/2B1R1K1 w - - 0 30 | Nxf5 | What piece is on e5? | Black Pawn | occupancy |
2b4r/4bk2/pq2pn1p/4p3/1r1N1R2/1PN1Q3/2P3PP/2KR4 w - - 0 25 | Qxe5 | Is the Black king in check? | No | check |
2r5/5pkp/1p6/pr4p1/1P2R3/P3P2P/5PP1/3R2K1 w - - 0 39 | Rd7 | Is the move from g1 to f3 legal? | No | legality |
8/1B3kp1/8/p4p2/7P/4K3/n7/8 w - - 0 43 | Bd5+ | What piece is on g6? | Empty | occupancy |
4k2r/7p/4P1pB/p3p3/1RP1P1K1/8/P6P/8 b - - 0 37 | axb4 | Is the d-file open, semi-open, or closed? | open | files |
2r3k1/5p2/1q4p1/p7/P2r3p/2pB1P2/2Q3PP/2R2K1N w - - 1 35 | Nf2 | What is the material balance in this position? | Equal | material |
1rbR2R1/5p1k/p7/1p3p2/8/1P3B1P/2r2PP1/6K1 w - - 2 35 | b4 | Identify any White knight outposts on the board. | None | outposts |
8/kp2r3/1R2p1pn/P1Npr2p/7P/R4PPK/8/8 b - - 1 56 | d4 | Are there any open files in this position? | Yes: c | files |
2r2n2/p1q1bkp1/2p3p1/P1Pp3r/3P1P2/2BN4/1PQ4P/2KR3R w - - 1 29 | Ne5+ | Are there any open files in this position? | Yes: e | files |
2r2rk1/pbp1qppp/1pn1pb2/6B1/3P1N1P/P5Q1/1PP2PP1/2KR1B1R b - - 5 14 | g6 | Is the e-file open, semi-open, or closed? | semi-open for White | files |
6k1/pbr2p1p/1p1r2p1/4Pq2/8/2P2NQ1/PP4PP/4R1K1 w - - 1 29 | exd6 | What is the material balance in this position? | Black is up 4 pawns of material | material |
rnbqk2r/ppp2ppp/5N2/b7/5B2/2PP4/PP4PP/R2QKBNR b KQkq - 0 8 | e4f6 | Is the Black king in check? | Yes | check |
r2q1rk1/ppp1bppp/3p1n2/1N6/4P3/2Q5/PPP2PPP/R1B1R1K1 b - - 2 11 | c6 | Is the move from g8 to h8 legal? | Yes | legality |
8/6p1/5pPp/5P2/4k1KP/8/8/8 w - - 0 3 | Kh5 | Is the White king in check? | No | check |
rnbq1r1k/1pN3bp/pn1P1p2/4p3/2p4N/8/PPB2PPP/R2QR1K1 w - - 2 22 | Qh5 | Is the move from a2 to f3 legal? | No | legality |
1r2rbk1/5pp1/3p2np/1pP1Pq2/8/1Q2BN1P/1P3PP1/R1R3K1 b - - 0 22 | dxc5 | Identify any White knight outposts on the board. | b6, d6 | outposts |
8/pp4pk/5b1p/3p1Q2/2qP4/r7/PK1R2PP/3R4 b - - 3 28 | Kh8 | Is the move from b7 to e3 legal? | No | legality |
1rRbk3/8/4K3/pPB3p1/P5P1/8/8/8 w - - 0 43 | Rc6 | What piece is on a5? | Black Pawn | occupancy |
8/8/8/6pP/8/k7/1p6/1K6 w - - 0 26 | h6 | Identify any Black knight outposts on the board. | f4, h4 | outposts |
r1bqr1k1/ppp2p2/2np1bpp/4p3/2P5/2NP2P1/PP1NPPBP/R2Q1RK1 b - - 1 11 | Bg7 | What piece is on f4? | Empty | occupancy |
r2q1rk1/1pp3bp/3p2p1/p1nPp3/2P1PpP1/2N2P1b/PPQ1B1NP/R3R1K1 b Qq - 0 4 | h5 | Identify any White knight outposts on the board. | None | outposts |
8/R7/5ppk/8/p3P3/P3b1NB/1P6/4n1rK w - - 2 44 | g2g1 | Identify any White knight outposts on the board. | d5 | outposts |
1B5b/1pp1pK2/8/1PP5/3k1P2/N4B2/r6P/8 w - - 0 1 | Ba7 | Is the move from f7 to f8 legal? | Yes | legality |
rnbqkb1r/pp1p1ppp/4pn2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq - 1 5 | Nc3 | What is the material balance in this position? | Equal | material |
r2q1rk1/pp2bppp/2pp1n2/8/3NP3/2Q5/PPP2PPP/R1B1R1K1 b - - 1 12 | Nd7 | What piece is on d8? | Black Queen | occupancy |
rnbq1rk1/ppp1bppp/8/8/3Np3/3B4/PPP2PPP/R1BQ1RK1 w - - 0 10 | Bxe4 | Does Black have any isolated pawns? | No | structure |
rnbqk2r/ppppppbp/5np1/8/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq - 1 4 | Bg2 | Does Black have any passed pawns? | No | structure |
r1bqkb1r/pp1n1ppp/2n1p3/3pP3/3N1P2/2N1B3/PPP3PP/R2QKB1R b KQkq - 0 8 | Bc5 | Is the move from d7 to g1 legal? | No | legality |
1r4k1/1r3p2/3pbpqp/8/3PP2P/6N1/3Q2PK/3B1R2 w - - 0 32 | d5 | What piece is on b4? | Empty | occupancy |
r5k1/pp3ppp/3P4/P7/1P6/2P5/q1KBQ2P/4R3 w - - 16 38 | a1a2 | Is the White king in check? | Yes | check |
5rk1/p4pbp/3n2p1/8/P4P2/3pB3/1P2qQPP/R4NK1 b - - 1 27 | Ne4 | Is the move from e2 to d1 legal? | Yes | legality |
r3r2k/2p5/1p2B1R1/p2pqn1P/7Q/P4p2/1PP5/1K2R3 w - - 5 33 | Rh6+ | Does White have any isolated pawns? | Yes: h5 | structure |
1r4nk/1p1qbr1p/3p4/p1pPpp2/2P1P3/2N1BP1P/PP1Q2RK/5R2 b - - 1 28 | f4 | Does White have any passed pawns? | No | structure |
3r1nk1/4r1p1/R3Pb2/5B1Q/1qp2P1P/3p2P1/1P1R1B1K/8 w - - 2 37 | Be1 | Does Black have any isolated pawns? | Yes: g7 | structure |
2kr3r/1ppbb1Rp/pq2p3/8/n1QPN3/P3P3/2P1N1PP/5RK1 w - - 1 20 | Rxe7 | Does White have any passed pawns? | No | structure |
r4r2/1p2p1bk/2ppbn1p/p1Pn1ppq/N2P4/1P2P1P1/P1QN1PBP/2RRB1K1 w - - 2 21 | Bf3 | What piece is on h1? | Empty | occupancy |
8/8/7p/6q1/5pk1/8/8/4QK2 w - - 22 20 | Qe6+ | Does Black have any isolated pawns? | Yes: f4, h6 | structure |
r4r2/1p1b2k1/2p3n1/p1Pp4/R2N1p2/P5P1/1P3PB1/4R1K1 w - - 2 31 | Bf3 | Is the move from d4 to f4 legal? | No | legality |
r2qk2r/p1pp1pp1/1pn1pn2/8/3P3p/2P2BP1/PBP2P1P/R2Q1RK1 w kq - 0 12 | h5h4 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r3k2r/ppp2ppp/3p1n2/4p1Q1/4q1b1/2P1B3/P3NPPP/R2K3R w kq - 4 14 | c8g4 | What is the material balance in this position? | Black is up 3 pawns of material | material |
1r1r4/7p/p1N4R/4k1P1/4P2B/n1p2R2/P1P4P/2K5 b - - 13 33 | d4c6 | Is the Black king in check? | Yes | check |
r2q1rk1/1b2bppp/p1n1pn2/1p4B1/3P4/1BN2N2/PP2QPPP/3RR1K1 b - - 0 13 | Nd5 | Identify any Black knight outposts on the board. | d5 | outposts |
rn1qkbnr/p1pppppp/1p6/8/8/3PB3/PPP1PP1P/RN1QKBNb w Qkq - 0 5 | g2h1 | What is the material balance in this position? | Black is up 6 pawns of material | material |
3r4/3P1p1k/2r3p1/2q2p1p/1p1R4/6QP/1P3PP1/4R1K1 w - - 0 39 | Qh4 | What piece is on g3? | White Queen | occupancy |
r1b1kb1r/1pqp1ppp/p1n1pn2/8/3NP3/3B4/PPPN1PPP/R1BQ1RK1 w kq - 6 8 | Nxc6 | Is the d-file open, semi-open, or closed? | semi-open for White | files |
rnbqk2r/ppp1bpp1/4pn1p/3p2B1/2PP4/2N2N2/PP2PPPP/R2QKB1R w KQkq - 0 6 | Bf4 | Identify any White knight outposts on the board. | None | outposts |
4B1k1/5ppp/1q6/2r1p2n/p2nP3/4QNPb/PP1N1P2/2R3K1 w - - 0 28 | Nc4 | What piece is on e3? | White Queen | occupancy |
rn1q1rk1/ppp2p2/5p1p/3p4/2BNP1b1/6Q1/PPP3PP/RN3RK1 w - - 0 13 | d6d5 | What is the material balance in this position? | White is up 2 pawns of material | material |
2r3k1/1p3ppp/p4n2/3p1P2/P2Pp3/1P2P3/6PP/3Rq1K1 w - - 0 30 | d2e1 | What is the material balance in this position? | Black is up 12 pawns of material | material |
6k1/pp3ppp/3b4/1P3q2/P2B1nb1/1Q1P1N2/5PPP/3Br1K1 w - - 0 25 | Nxe1 | Identify any Black knight outposts on the board. | None | outposts |
1r6/k1nnqr2/bp1p1pp1/p1pPp2p/P1P1P2P/N1P1BPP1/KR1Q4/1R3B2 w - - 16 34 | Bh3 | What piece is on f2? | Empty | occupancy |
4rrbk/pp1q2pp/2pb4/3pnp2/1P1N2n1/P2PPNP1/1BQ2PBP/2R2RK1 w - - 0 18 | Bc3 | Is the e-file open, semi-open, or closed? | semi-open for Black | files |
2r1kb1r/p3pppp/2pq4/8/Q4n2/2P3Nb/PP3P1P/RNB2K1R w k - 4 17 | g2f4 | Is the White king in check? | Yes | check |
r2r2k1/pp2bppp/5n2/4BQ2/2q5/P1N4P/1P3PP1/3RR1K1 b - - 0 20 | Rxd1 | Is the c-file open, semi-open, or closed? | open | files |
1rb2r1k/4bppp/p1qp4/1p3PP1/7Q/1PN1BR2/1PP4P/5RK1 b - - 2 21 | Bb7 | Identify any Black knight outposts on the board. | None | outposts |
r1nq1rk1/pb3ppp/1p6/3pR3/3P4/P1NQ1N2/1P3PPP/2R3K1 b - - 3 17 | f6 | What is the material balance in this position? | Equal | material |
r4k2/1p2p3/p6n/8/2q1N2R/2P5/P7/2K2r1R w - - 3 32 | f6f1 | Is the White king in check? | Yes | check |
5Q2/p5pk/4p1q1/8/6p1/5P2/P2r3P/1R2R2K b - - 1 4 | g3 | What piece is on h2? | White Pawn | occupancy |
r5k1/2q3pp/3p4/1bpP4/1p2BR2/6P1/7P/2Q3K1 b - - 2 29 | f1f4 | What is the material balance in this position? | Black is up 2 pawns of material | material |
rnb2rk1/ppp3pp/3bpq2/3p1p2/3Pn3/2PNP3/PP2BPPP/RNBQ1RK1 b - - 0 1 | Bxh2+ | What is the material balance in this position? | Equal | material |
r1b3k1/pp3pp1/1qn4p/8/8/P3Q3/1P2PPPP/3NKB1R b K - 2 16 | Nd4 | Identify any White knight outposts on the board. | None | outposts |
1Q6/6pk/p4r1p/P2p4/3P4/8/2R1K3/5r2 w - - 0 46 | Qg3 | What is the material balance in this position? | White is up 2 pawns of material | material |
r2qk1nr/ppp1bppp/2n1p3/8/2pP2b1/5NP1/PP2PPBP/RNBQ1RK1 w kq - 0 7 | Qa4 | Identify any Black knight outposts on the board. | None | outposts |
r5rk/1ppqb1pp/2bpNp2/p4P2/P1Q1P1nB/2N5/1PP3PP/3R1RK1 w - - 1 18 | Qe2 | Identify any White knight outposts on the board. | None | outposts |
r1b3k1/1pP2pp1/1q3n2/pN2p3/1np1P3/Q3P2P/6P1/R3NK1R w - - 0 24 | Qxb4 | Is the h-file open, semi-open, or closed? | semi-open for Black | files |
2kr2r1/pp3pPp/8/3Bn3/4p3/7q/PPP1QPRP/R4K2 w - - 1 21 | Qxe4 | Is the move from a1 to d1 legal? | Yes | legality |
r1b1k2r/pp3ppp/1bnQ1n2/8/1P6/P7/1B2K1PP/R4BR1 b kq - 0 14 | Bg4+ | Is the move from a7 to a6 legal? | Yes | legality |
r1bqk2r/ppp2ppp/2n1pn2/3p4/1bPP4/P1N2N2/1PQ1PPPP/R1B1KB1R b KQkq - 0 6 | Ba5 | Is the move from g7 to g6 legal? | Yes | legality |
rnb2rk1/pp2ppbp/2p2np1/q7/2BP1B2/2N1PN2/PPQ2PPP/R3K2R b KQ - 0 9 | Nbd7 | Is the c-file open, semi-open, or closed? | semi-open for White | files |
2k4r/2p2pp1/1nNbq3/1P2p2p/4P3/3PQ3/2P2PPP/R5K1 w - - 3 25 | f3 | Identify any White knight outposts on the board. | a6, c4, c6 | outposts |
3n4/1p1N4/p3p3/P4p2/1P3Pk1/3KP3/8/8 b - - 0 41 | Nc6 | Identify any White knight outposts on the board. | None | outposts |
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