fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
8/p4pk1/1p2p3/4p2p/2PrP1n1/1PNR2P1/P3K3/8 b - - 11 34 | Kf6 | Are there any open files in this position? | Yes: d | files |
2kr3r/ppp2ppp/1bp1bq2/8/4P3/1N1B2Q1/PPP2PPP/2KR3R b - - 1 13 | Bxf2 | Is the move from e6 to f5 legal? | Yes | legality |
r1b5/4R1bp/p2B1kp1/1p6/1n6/4P2P/PP3PP1/2R3K1 w - - 4 29 | Bxb4 | Is the Black king in check? | No | check |
r4rk1/p2qbppp/2pp1n2/n7/B3PB2/2N2N1b/PPP3P1/R2Q1RK1 w - - 0 14 | g4h3 | What is the material balance in this position? | Black is up 1 pawn of material | material |
6k1/R5pp/5p2/Br1p4/1Pn5/3K2P1/5P1P/8 b - - 10 44 | Ne5+ | Is the b-file open, semi-open, or closed? | semi-open for Black | files |
1r4R1/p1ppk3/1p2ppN1/4P3/3P3B/1nN2q2/P7/R3K3 b - - 0 32 | f4g6 | Is the Black king in check? | Yes | check |
3r4/5p1p/p7/kpp2p2/5B2/qPP4P/P4PP1/6K1 w - - 0 35 | Bc7# | Does White have any passed pawns? | No | structure |
rnbq1rk1/ppp1bpp1/4pn1p/3p4/2PP3B/2N1PN2/PP3PPP/R2QKB1R b KQ - 1 7 | b6 | What piece is on e7? | Black Bishop | occupancy |
r4rk1/4bppp/2bp1n2/q3p3/4P3/2N1RN1P/B1P2PP1/R2Q2K1 w - - 0 20 | Bxf7+ | Identify any Black knight outposts on the board. | c5 | outposts |
r6r/1Q2qk2/p3p1p1/1p2P3/3P4/2P3R1/PP5P/6K1 w - - 1 4 | Rf3+ | What is the material balance in this position? | Black is up 3 pawns of material | material |
2r1kq1r/1p1b1p2/1nn1p3/p2pP1Np/3P2p1/P2Q4/1P3PPP/RBB1R1K1 b - - 5 22 | a4 | Is the move from e6 to a2 legal? | No | legality |
1R5R/pk1rn3/1p1p1p1P/8/5PP1/2P5/PP6/6K1 b - - 2 37 | c8b8 | Is the Black king in check? | Yes | check |
2k5/R5pp/1p3p2/2p1b3/P1P5/1P5P/5PP1/3r2K1 w - - 1 31 | d3d1 | What is the material balance in this position? | Black is up 2 pawns of material | material |
6r1/7p/1k6/8/2R1N2P/5PP1/1PP1K3/7r w - - 3 39 | b4 | What piece is on c8? | Empty | occupancy |
1bNr4/5ppk/6p1/8/2QB2q1/4P3/R4P1n/2R2K2 w - - 12 36 | f3h2 | Is the Black king in check? | No | check |
r2k3r/2q1b2p/p1Pp2p1/2n2PB1/1pB1nP2/4Q3/PPP4P/2KRR3 b - - 0 20 | gxf5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
rnbqkbnr/p3pppp/1p1p4/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq - 0 4 | dxc5 | What is the material balance in this position? | Equal | material |
R7/2p2k1p/3p4/3Pr3/2Q5/2p2P1P/1q4P1/6K1 w - - 2 37 | Qf4+ | Does White have any passed pawns? | Yes: f3 | structure |
8/6k1/1P1p2p1/3Pp3/3q4/6P1/6P1/rR2QB1K b - - 0 39 | Ra8 | Is the move from d4 to a7 legal? | No | legality |
2rr4/p3qpkp/4p1p1/2p4n/2P5/1P3Q1P/P4PP1/1B1R1RK1 b - - 0 23 | e5 | What piece is on a2? | White Pawn | occupancy |
2r3k1/1p4pp/pn1qp1p1/Q2p4/3P2P1/1P1NP2P/P4P2/5rK1 w - - 0 27 | c1f1 | Is the White king in check? | Yes | check |
r1b2rk1/p1q2p1p/2pbpnp1/2ppN2Q/5P2/1P2P2R/PBPP2PP/RN4K1 w - - 2 13 | Ng4 | Is the White king in check? | No | check |
r4rk1/pp3pB1/2n2b2/2p2N1P/6Q1/2Pq4/PP3PP1/K6R b - - 2 27 | Ne5 | Is the e-file open, semi-open, or closed? | open | files |
r1b1kbnr/ppp2ppp/8/8/1PPq4/2N2Q2/3P1PPP/R1B1KB1R b KQkq - 1 9 | Bxb4 | Identify any Black knight outposts on the board. | None | outposts |
r3r3/1p4k1/2p2p2/p2p1qp1/3Pn1Np/3QP2P/PPR2PP1/3R2K1 w - - 0 28 | f3 | Identify any Black knight outposts on the board. | None | outposts |
4rrk1/2p3pp/p7/1p1p2q1/3B4/2P2PNb/PPB4P/R2Q2K1 w - - 3 21 | a4 | Does White have any isolated pawns? | Yes: f3, h2 | structure |
r3k1r1/1p5p/p1n1p3/5p2/1B1Pp3/P3K1P1/5P1P/2R4R w q - 0 22 | Rhd1 | What is the material balance in this position? | Black is up 1 pawn of material | material |
rn1qkb1r/pb1p1ppp/1p2pn2/2p5/2P5/5NP1/PP1PPPBP/RNBQ1RK1 w kq - 0 6 | d3 | Identify any White knight outposts on the board. | None | outposts |
r1b1qrk1/1pp1ppbp/1n4p1/p3P3/4N3/5N1P/1PPBQPP1/R3R1K1 b - - 3 16 | a4 | Is the move from f7 to f5 legal? | Yes | legality |
8/1r4k1/1P1r1p1p/1R3KpP/1R4P1/8/5P2/8 b - - 9 49 | Kf7 | Is the b-file open, semi-open, or closed? | semi-open for Black | files |
5rk1/8/p5Q1/2pr4/1PqN4/2P5/P2K3P/R7 b - - 0 33 | h6g6 | Is the Black king in check? | Yes | check |
3Qk2r/1p1bbppp/3p4/1B6/8/8/PPP2PPP/R1B1R1K1 b - - 0 18 | a8d8 | Is the Black king in check? | Yes | check |
r1b2rk1/pp3pbp/2pp1np1/q3n3/2PNP3/2N1B1PP/PP2QPB1/R4RK1 b - - 2 12 | c5 | Is the d-file open, semi-open, or closed? | semi-open for White | files |
r3rbk1/1b1n1pp1/pq1ppn1p/2p5/1P2P2B/2PPNN1P/BP3PP1/R2QR1K1 b - - 0 16 | a3b4 | Identify any White knight outposts on the board. | a5 | outposts |
4r3/2p3k1/p2p4/Pp4pp/8/2PN4/1P4K1/6R1 w - - 0 34 | Nb4 | Identify any Black knight outposts on the board. | e5, f4, g4, h4 | outposts |
r1bq1b1r/pppnp1pp/4k3/3n3Q/3P4/8/PPP2PPP/RNB1KB1R w KQ - 2 8 | c4 | Are there any open files in this position? | No | files |
5k2/5p2/p2pp1p1/1p2b2n/2nNP3/2P5/P1P3R1/1K5R w - - 0 26 | Rf2 | Are there any open files in this position? | Yes: h | files |
r1bq1rk1/pp1nb1pp/2p1p3/3p1p1n/2PP1B2/2NBPN2/PPQ2PPP/3RK2R w K - 0 10 | h4 | What piece is on e4? | Empty | occupancy |
5nk1/pp1b4/4pp2/3p2p1/8/2r5/PPB2PPP/2R3K1 w - - 0 28 | bxc3 | What is the material balance in this position? | Black is up 4 pawns of material | material |
6k1/5p2/6p1/2b5/5P2/6P1/4K1q1/8 w - - 3 34 | d5g2 | What is the material balance in this position? | Black is up 12 pawns of material | material |
N4Rnr/p2k2pp/2n1p3/b2pP3/2pP4/4BN2/P1b1BPPP/6K1 w - - 3 18 | a3 | What piece is on b1? | Empty | occupancy |
r1q1k2r/4bpp1/p1n1pnp1/1p1p4/3P1B1P/2P2N2/PPQN1PP1/4RK1R w kq - 0 15 | Rh3 | Are there any open files in this position? | No | files |
r4n1r/p3pkb1/1p1q3p/2pP2p1/3P1N1B/1QP5/P4PPP/R3R1K1 w - - 5 20 | dxc5 | Are there any open files in this position? | No | files |
2k3r1/Qp2bp2/pBbpp2p/4n3/8/1B3N2/PPP1n1rP/5R1K w - - 0 25 | Ba4 | What is the material balance in this position? | Black is up 1 pawn of material | material |
2kr2r1/pp1b3p/2n1p2p/qN1pP3/P1p4n/2P3P1/2PBBP2/R2QR1K1 b - - 0 20 | Kb8 | Are there any open files in this position? | No | files |
2kr3r/1p3p1p/p1n5/2N3p1/2b1pKPb/1PN1P2P/P1P3B1/1R5R w - - 0 23 | Kxe4 | Does White have any passed pawns? | No | structure |
5rk1/p1p2pbp/1qQp2p1/3P1b2/8/PP3N2/KP3PPP/3R3R b - - 6 22 | Qxf2 | What is the material balance in this position? | White is up 3 pawns of material | material |
r1b2r1k/1p4bp/2pR4/p1P1n3/1P2P1pq/6N1/PBQ2PB1/1R4K1 w - - 0 27 | b5 | Is the Black king in check? | No | check |
8/5p2/3pk1r1/3Q4/1P2P2R/P2P2P1/2P3RK/8 b - - 2 43 | c6d5 | Is the White king in check? | No | check |
r4k2/pp3ppQ/1q2bb1p/3r4/3P1N2/P7/1Pn2PPP/4RRK1 w - - 0 20 | Nxd5 | Identify any Black knight outposts on the board. | None | outposts |
r2k1b1r/ppN2ppp/8/3PP3/7n/7q/PP2BP1P/R1BQ1RK1 w - - 1 17 | Ne6+ | Does White have any isolated pawns? | Yes: h2 | structure |
8/8/1p6/p1p2kB1/P1P2n2/1P4Kp/8/8 w - - 0 51 | Bd8 | Identify any Black knight outposts on the board. | None | outposts |
4rrk1/p2n1ppb/1pqN3p/2p1p3/P2pPP2/1P1P1QPB/2P4P/R1B1R1K1 b - - 0 20 | Qxd6 | What piece is on b3? | White Pawn | occupancy |
rnb2rk1/pp2qppp/4pn2/2b5/2p5/1P3NP1/P1QNPPBP/R1B2RK1 b - - 3 10 | Nc6 | Is the Black king in check? | No | check |
rnbqkb1r/ppp1pppp/5n2/8/2pP4/2N5/PP2PPPP/R1BQKBNR w KQkq - 2 4 | g8f6 | What is the material balance in this position? | Black is up 1 pawn of material | material |
rnbqkbnr/pp1ppppp/2p5/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq - 0 2 | d4 | Does White have any isolated pawns? | No | structure |
r4rk1/pp3p2/2bp3Q/4p2P/4P2P/1P3q2/1PP1N3/R3K2R w KQ - 2 25 | Rg1+ | Does Black have any isolated pawns? | No | structure |
5b1r/6pk/p1R5/4P2p/7r/8/P5K1/2B2R2 w - - 2 34 | Rf7 | Is the g-file open, semi-open, or closed? | semi-open for White | files |
8/8/1np2bk1/8/8/K7/8/2q5 w - - 0 63 | c2c1q | Is the White king in check? | Yes | check |
r1b1kb1r/pp2nppp/q1n1p3/4P3/2NP4/P1P2N2/1P3PPP/R1BQK2R w KQkq - 1 10 | Nd6+ | Are there any open files in this position? | No | files |
2r2rk1/1b2q2p/1p1p1pp1/pPn1pP2/P1PpP1P1/R2P3P/3N2B1/2Q3RK w - - 0 2 | Bf3 | Are there any open files in this position? | No | files |
r1bq1rk1/ppp3pp/2nppn2/5p2/2PP4/1Q3NP1/PP1NPPBP/R4RK1 b - - 1 9 | Kh8 | Are there any open files in this position? | No | files |
3q1rk1/7p/p3n1P1/3p4/3P2QK/P3P2P/8/R1B5 w - - 7 30 | b8d8 | Is the White king in check? | Yes | check |
rn2k2r/3p1ppp/p1q1p3/bp2P3/5P2/5QN1/P1P3PP/1RB2RK1 w kq - 1 16 | Ne4 | Are there any open files in this position? | No | files |
r1b1k2r/5ppp/2p1p3/q1p5/8/P1N5/1PQ1NPPP/R3K2R b KQkq - 1 17 | g1e2 | What is the material balance in this position? | White is up 2 pawns of material | material |
2r2r2/4p1kp/3q2p1/p1p1p3/1p3pP1/2PP1B1P/PP1Q1P2/R3R1K1 b - - 1 23 | c1d2 | What is the material balance in this position? | White is up 2 pawns of material | material |
r1bqk1nr/pppp1pbp/2n3p1/4p3/2PPP3/5N2/PP3PPP/RNBQKB1R w KQkq - 0 5 | Bg5 | Does White have any isolated pawns? | No | structure |
1r4k1/1P3pp1/q6p/4Pp2/7P/1R3N2/5PP1/2R3K1 w - - 0 11 | Rc7 | Does White have any isolated pawns? | Yes: b7 | structure |
r4rk1/1b2qppp/p2p1n2/2p1pP2/1p2P3/1P1P1RNQ/1PP3PP/R2N2K1 b - - 1 18 | h6 | What piece is on g7? | Black Pawn | occupancy |
2kr2nr/pppq1pp1/8/4P3/1QPp4/5Npb/P2NPPBP/2B2RK1 w - - 1 14 | e6 | Does White have any passed pawns? | No | structure |
rnbqkbnr/pp3ppp/3p4/2pP4/8/8/PP2PPPP/RNBQKBNR w KQkq - 0 5 | e4 | Is the move from d1 to a4 legal? | Yes | legality |
r2q1rk1/pp3pp1/2n1bb1p/3pN3/2pP4/2N3P1/PP2PPBP/2RQ1RK1 w - - 0 13 | f4 | Is the c-file open, semi-open, or closed? | semi-open for White | files |
8/ppp3pk/7p/8/4n2q/2P1P1N1/PP2K2P/R6R b - - 1 29 | Qg4+ | Is the move from a7 to a6 legal? | Yes | legality |
8/8/2r1k3/3pP1p1/3P4/7R/3K4/8 w - - 0 65 | Rh6+ | Are there any open files in this position? | Yes: a, b, c, f, h | files |
r1b2rk1/p2nbppp/1p2pn2/7q/2P5/PP1B1N2/1B1NQPPP/R3K2R w KQ - 1 13 | O-O-O | What piece is on c6? | Empty | occupancy |
r1bqkb1r/pppp1ppp/2n2n2/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq - 1 4 | d5 | Is the move from c1 to d2 legal? | Yes | legality |
4r2k/2p4p/7q/3Q4/3p1p2/1P1Nb1rP/P1P1R1P1/R4K2 b - - 2 5 | f3 | Is the Black king in check? | No | check |
1r3rk1/7p/4p1q1/2p1b1PN/4P3/1PpbB2Q/P7/2K3RR b - - 2 26 | Rxb3 | Identify any Black knight outposts on the board. | None | outposts |
r2q1rk1/p2nb1p1/1p2p3/2pbP1P1/8/1P6/PBPPQ1P1/2KR3R w - - 1 17 | Rh8+ | Is the move from d2 to f1 legal? | No | legality |
3rr1k1/1bq2pbp/pp2pnp1/3Pn3/3NP3/1PN2P2/PB3QPP/2R1RBK1 b - - 0 18 | Nfg4 | Is the move from e8 to a4 legal? | No | legality |
r7/pb2nppp/1kp1p3/4B3/2B5/P3PN2/5PPP/R2r2K1 w - - 0 19 | d8d1 | Is the Black king in check? | No | check |
r1b2rk1/2p1qpp1/p1pp3p/4p2n/2N1P3/2PP1N2/PP3PPP/R2Q1RK1 w - - 0 13 | Nfxe5 | Is the Black king in check? | No | check |
3r2k1/5p1p/p7/3n4/2p3p1/2Pp2P1/P2R1PKP/2R5 b - - 0 26 | f5 | Does White have any passed pawns? | No | structure |
5rk1/p2b1pp1/7p/1p2pPq1/1P1pP1B1/3P3P/3N1RP1/3R2K1 b - - 0 24 | a1d1 | What is the material balance in this position? | Black is up 2 pawns of material | material |
2r1k1nr/nb1q4/1p5p/p3Q1p1/5P2/P1NB2BN/1PP3PP/2KR4 b k - 0 22 | d4e5 | Is the Black king in check? | Yes | check |
rnbqk2r/1ppp1ppp/p4n2/2bPp3/2P5/2N5/PP2PPPP/R1BQKBNR w KQkq - 0 5 | Bg5 | Is the Black king in check? | No | check |
3q1rk1/1p2ppbp/p2pb1p1/4n1Q1/8/1N5P/PPP1BPP1/1K1R3R b - - 0 16 | Qc7 | Is the move from g6 to a8 legal? | No | legality |
6k1/3q2p1/4p2p/2Nn3P/p3Q3/P1K5/1P6/8 w - - 12 46 | Kd4 | Does Black have any passed pawns? | Yes: e6 | structure |
5r1k/6q1/p1R2b1p/3Q4/1P4b1/8/P4PP1/5RK1 b - - 0 32 | Bh4 | Identify any White knight outposts on the board. | a5, c5 | outposts |
8/6pk/7p/5Q2/8/P4B1P/5PP1/R4RK1 b - - 0 32 | d5f5 | Is the Black king in check? | Yes | check |
r4rk1/2p1bppp/p3pN2/1p6/3q3P/3B4/PPP1QPP1/1K1R3R b - - 0 16 | Bxf6 | What piece is on f8? | Black Rook | occupancy |
4rrk1/2p4p/p7/1p1p2p1/3P4/3n1N1P/PP4P1/R1BB2K1 b - - 0 22 | Rxf3 | Is the Black king in check? | No | check |
2r4k/2q3pp/1r6/4P1P1/p3Q2P/8/PPP5/K1RR4 b - - 0 31 | a3 | Are there any open files in this position? | Yes: d, f | files |
1r1q2k1/R3bp1p/6p1/N2rp3/1P6/1QP5/5PPP/R5K1 b - - 4 29 | Rc8 | Identify any White knight outposts on the board. | a5, b4, c5 | outposts |
6Q1/1b1kb3/ppp5/4p3/2P1P3/3Kr2q/PPP5/R7 w - - 0 33 | f3e3 | Is the Black king in check? | No | check |
8/2b5/8/3B4/5p2/4k1p1/6Kp/8 w - - 0 1 | Kh1 | What piece is on d5? | White Bishop | occupancy |
r3k2r/2q1npp1/pp2p2p/n1ppP2P/b2P1B2/P1PB1N2/2P2PP1/RQ3RK1 w kq - 4 15 | Ra2 | Is the move from a1 to a2 legal? | Yes | legality |
1r4k1/5p1p/2pqp2B/5p2/3P3R/1Bn3P1/1K2QP1P/3R4 b - - 2 28 | Nxe2 | Is the move from d6 to f8 legal? | Yes | legality |
r1b1k1nr/pppp1ppp/2n5/4P3/1b3B2/2Q2N2/PqP1PPPP/RN2KB1R w KQkq - 2 7 | Bd2 | Does White have any isolated pawns? | Yes: a2, c2 | structure |
8/8/4b3/4B3/6P1/1p3k1p/3K4/8 b - - 1 61 | Bxg4 | Identify any Black knight outposts on the board. | None | outposts |
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