fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
2rq1rk1/4b1pp/1p1p4/p2Pp3/1P3p2/P2Q4/2PB1PPP/R2R2K1 b - - 1 23 | f3 | Is the move from e5 to f1 legal? | No | legality |
r3k2r/1R1bbppp/p3p3/3pP3/3B1P2/2N5/P1P2KPP/7R w kq - 1 18 | Rhb1 | Is the move from f2 to g3 legal? | Yes | legality |
8/8/7p/1BK4P/8/3Nk3/4p3/7r w - - 3 62 | Nf4 | Is the move from d3 to a8 legal? | No | legality |
5br1/1q1k4/p2P4/4Bbp1/1p1Q1p2/1P6/P1P2PP1/1K1R4 w - - 2 29 | Qc4 | Is the move from d1 to f1 legal? | Yes | legality |
6k1/1p2p2p/1B1p2p1/8/4rpbP/1Nb5/P1P2R2/1K5R b - - 1 24 | Kg7 | Does Black have any passed pawns? | Yes: e7, f4 | structure |
r2k2nr/pRR5/2p1p1B1/4P2p/1P2n3/3Q4/P5PN/7K b - - 4 28 | c3d3 | Is the White king in check? | No | check |
2k1r1nr/1bpn2q1/pp4pp/4P3/2B5/2N5/PPPBQ1PP/2KR1R2 w - - 0 18 | e6 | What piece is on c3? | White Knight | occupancy |
3r1k2/3q1ppp/1b6/1p2pP2/1Pp1B1P1/2P4P/4QPK1/R7 w - - 3 31 | Qf3 | Is the Black king in check? | No | check |
r6r/pppk1ppp/4b3/3p3Q/3P1q2/2PB4/PP3PPP/R3R1K1 w - - 0 14 | Re5 | Does Black have any passed pawns? | No | structure |
8/4Q1p1/p4k2/6r1/6B1/8/PP3PPP/RN3RK1 b - - 10 35 | e8e7 | Is the Black king in check? | Yes | check |
8/5pp1/4k2p/p7/Np1n1P2/P6P/1P4P1/5K2 b - - 1 9 | bxa3 | Is the move from a5 to g5 legal? | No | legality |
r2r2k1/1p3pp1/4n2p/p1qp4/3N4/n1N1PP2/1P3QPP/3R1RK1 w - - 0 25 | e4 | Is the move from f2 to b4 legal? | No | legality |
r5k1/1RR2pp1/4rn1p/4p3/p7/q1nPNN1P/2Q2PP1/6K1 b - - 2 25 | Ncd5 | What piece is on a5? | Empty | occupancy |
r2qr1k1/1p2bpp1/p1bp1n1p/2p5/4PP2/1PN1BQ1P/1PP1N1P1/R3R1K1 w - - 2 17 | Nd5 | Identify any Black knight outposts on the board. | None | outposts |
7Q/1p3p1P/pk3P2/3p1q2/P1pP4/2P5/2PK4/8 b - - 0 41 | Qf4+ | Is the e-file open, semi-open, or closed? | open | files |
3r3k/3KR2P/6P1/5P2/8/8/8/8 w - - 9 77 | Ke6 | Does White have any passed pawns? | Yes: f5, g6, h7 | structure |
r2q1rk1/1b1nppbp/pp1p1np1/2p5/P1P1P3/3P1N2/1P2BPPP/RNBQ1RK1 w - - 1 11 | Nc3 | Are there any open files in this position? | No | files |
r4r2/ppp1k3/4p1Q1/6b1/4P3/8/PPPq1PPP/R2N1K1R b - - 2 18 | Rxf2+ | Identify any White knight outposts on the board. | None | outposts |
r1b1kb2/pp3p2/2B5/3p2p1/3p1p2/2P5/PPKN4/r7 b q - 0 24 | b5c6 | Is the White king in check? | No | check |
r1bqkb1r/ppp2ppp/2n5/3pP3/4n3/2N2N2/PPPP2PP/R1BQKB1R w KQkq - 2 6 | Bb5 | Is the f-file open, semi-open, or closed? | semi-open for White | files |
rnbqk2r/ppp2ppp/4pn2/6B1/1bpP4/2N2N2/PP2PPPP/R2QKB1R w KQkq - 0 6 | e4 | What piece is on c8? | Black Bishop | occupancy |
rR6/3n1k1p/6p1/8/5P1P/6P1/1b3PK1/8 w - - 0 42 | Rxa8 | Identify any Black knight outposts on the board. | None | outposts |
8/8/8/2R5/8/8/1K1rk3/8 w - - 94 112 | d1d2 | Is the White king in check? | Yes | check |
3qr3/1b1rbk1Q/p2p2p1/1p1np3/4P3/P2BB3/1PP3PP/4R2K b - - 1 23 | Ke6 | What piece is on h2? | White Pawn | occupancy |
2k4r/pp3p1p/3r1P2/3B4/1b3p2/5q2/PPP2PRP/R4K2 w - - 0 21 | Bxf3 | What piece is on a7? | Black Pawn | occupancy |
r4rk1/1pp1nppp/p1nq4/4Nb2/B2P4/2N5/PP1Q1PPP/2KRR3 w - - 8 15 | f4 | Is the move from g2 to g4 legal? | Yes | legality |
rn2kbnr/pp2pppp/2p5/3PN3/8/1P4P1/1P1PPP1P/1RB1KB1R b Kkq - 0 8 | cxd5 | What piece is on c5? | Empty | occupancy |
6k1/8/6p1/8/7P/4B3/P4PPK/3r4 b - - 3 38 | Ra1 | Are there any open files in this position? | Yes: b, c, d, e | files |
rnb1k1nr/pppp1p2/4p2p/6q1/2PP4/2N1PP2/PP1Q1P1P/2KR1B1R b kq - 2 10 | e1c1 | What is the material balance in this position? | Black is up 2 pawns of material | material |
2kr3r/ppp1qpp1/2p5/2b2b2/2P1pPnp/1P2P1PP/PBQPB3/RN2K2R w KQ - 0 13 | hxg4 | Is the move from b1 to c3 legal? | Yes | legality |
8/2p1nk1p/1p2q1p1/p3p3/P1Q1P1nP/1PP1NP2/8/6K1 w - - 0 36 | Nxg4 | What piece is on d7? | Empty | occupancy |
r2r2k1/1BB2pp1/4b2p/p1b5/P7/2P4P/1P3nP1/RN3RK1 b - - 0 18 | Rd1 | Identify any White knight outposts on the board. | d4 | outposts |
2r5/8/p3Nrpk/3n4/1P2p2p/2P1R2P/6P1/3R2K1 w - - 0 44 | Rxe4 | Is the c-file open, semi-open, or closed? | semi-open for Black | files |
2r1r1k1/1p1q1ppp/3p1b2/p2P4/2Q5/5N2/PP2RPPP/4R1K1 w - - 4 20 | Qc7 | Does Black have any isolated pawns? | Yes: d6 | structure |
8/8/6pp/R4k2/1p6/1r3PKP/6P1/8 b - - 7 51 | a6a5 | Is the Black king in check? | Yes | check |
6k1/5p2/1p4p1/p2qn3/7p/7R/P1P1B1PP/2R4K b - - 0 30 | Qd2 | What is the material balance in this position? | Equal | material |
r2qr1k1/pb3ppp/1p1p4/2n1p1B1/2P1P1n1/P4P2/1PBN1QPP/R3K2R w KQ - 2 16 | Bxd8 | What piece is on b3? | Empty | occupancy |
1rbq1rk1/2ppbppp/2n2n2/1p2p3/4P3/1B3N2/1PPP1PPP/RNBQR1K1 w - - 0 10 | h3 | Identify any White knight outposts on the board. | None | outposts |
r4rk1/4ppbp/b2p1np1/q1p5/1n1PP3/2N1BP2/PP1QN1PP/1K1R1B1R w - - 0 13 | a3 | Are there any open files in this position? | No | files |
3r2k1/3r2pp/p3pp2/nbb5/8/2P1PP2/1BBNK1PP/R2R4 w - - 0 21 | c6b5 | Is the White king in check? | Yes | check |
4rbk1/5pp1/7p/5q2/1p1Bb3/1Q2P1P1/5P1P/3RN1K1 b - - 17 39 | Bd5 | What piece is on b2? | Empty | occupancy |
7r/p2nk2p/4pp2/8/1p1PN3/8/P4PPP/5RK1 w - - 2 21 | Rc1 | What is the material balance in this position? | Equal | material |
8/8/4Bp1p/4kP2/P7/1P6/5PK1/r7 b - - 7 36 | Kf4 | Is the move from h6 to a1 legal? | No | legality |
rn4k1/1b3pqp/1p1r1p2/p1pPpB1Q/P1P1P3/B1P2NP1/7P/R5K1 b - - 7 23 | Nd7 | Is the move from d6 to e5 legal? | No | legality |
8/6P1/8/5K2/7k/8/8/8 w - - 1 56 | h3h4 | What is the material balance in this position? | White is up 1 pawn of material | material |
r3kb1r/p2qpppp/Ppn5/2pn4/3P4/2P2N2/1P3PPP/RNBQ1RK1 b kq - 0 13 | e6 | Does White have any passed pawns? | No | structure |
r2qr1k1/pppb1p2/n2p3B/3P4/1b1P2P1/PQ3B1p/1P2PP1P/R4RK1 b - - 2 17 | Qh4 | Is the move from f7 to f5 legal? | Yes | legality |
2k5/p1pp4/1p1b4/8/8/P2K1R2/1r6/8 b - - 0 43 | a2a3 | What is the material balance in this position? | Black is up 6 pawns of material | material |
r2r2k1/pbq1bpp1/1p2p3/2p1P2p/2P1BP2/6P1/PPN1Q1P1/3RR1K1 b - - 0 22 | g6 | Is the move from e6 to a5 legal? | No | legality |
1q1r1k2/5p1p/bn2pp1b/rN3N2/5P2/5Q2/PPP3PP/1K1RR3 w - - 2 20 | Qc3 | Is the a-file open, semi-open, or closed? | semi-open for Black | files |
2kr3r/pp3ppp/5P2/3Bb3/4pB2/5n1q/PPP1QPRP/R4K2 w - - 2 19 | Bxe5 | Is the Black king in check? | No | check |
r1bq1rk1/ppp2ppp/2n2n2/4p1B1/1bBP4/2N1PN2/PP3PPP/R2QK2R w KQ - 0 9 | a3 | Is the move from d4 to f3 legal? | No | legality |
r1b3k1/pp3Qb1/2npp2q/2p5/2B1p3/2NP4/PPP3PP/5RK1 b - - 1 18 | Kh7 | Is the g-file open, semi-open, or closed? | semi-open for Black | files |
r7/p1pn2k1/1p1p2Pp/n3pP1P/2qP4/P1P2P2/6R1/2Q1K2R b K - 0 22 | Rf8 | Are there any open files in this position? | No | files |
2k5/p1pq1p1r/2p3r1/2b1pN1n/4P3/2Q5/PPP2PP1/3RRK2 w - - 0 24 | Rxd7 | What piece is on e3? | Empty | occupancy |
rn1qkbnr/pp2pppp/2p5/5b2/3P4/2N2N2/PPP1BPPP/R1BQK2R b KQkq - 3 6 | e6 | What piece is on d1? | White Queen | occupancy |
2r2qk1/pp3p1p/4p1p1/3P2P1/5P2/2n2N1B/2P4P/K1QR3R b - - 1 24 | Qb4 | Is the move from g6 to b4 legal? | No | legality |
8/8/pr1p2pk/2pPp1r1/2P1R1PK/R7/5P2/8 w - - 8 40 | f3 | What piece is on d5? | White Pawn | occupancy |
r1b2rk1/pp1p1pb1/3Ppqp1/2p4n/2PnP3/2N4Q/PP2BP2/R1B1K1NR w KQ - 4 14 | f4 | Is the g-file open, semi-open, or closed? | semi-open for White | files |
r2q1b1r/pp2k1pp/2np1n2/8/2Q1P3/2N5/PPP2PPP/R1B1K2R w KQ - 3 11 | Bg5 | Are there any open files in this position? | No | files |
8/8/6p1/2K5/Q4k2/8/8/R2rq3 b - - 1 54 | a8a4 | Is the White king in check? | No | check |
2kr3r/pp3pb1/3pp1n1/q1pPP1pp/1PP2Pb1/P1NB2P1/3QN1P1/RR4K1 b - - 0 18 | Qb6 | Is the White king in check? | No | check |
8/8/4B3/8/8/kp2p3/3b4/3K4 w - - 5 5 | Bf5 | What piece is on a3? | Black King | occupancy |
r1b1q2r/ppk2N1p/2pp1p2/2b2P1Q/5B2/8/PP3PP1/2KR1B2 w - - 0 18 | Nxd6 | Is the h-file open, semi-open, or closed? | semi-open for White | files |
r1bq4/ppp2kp1/2np1n1p/3Np3/4P3/3PP3/PPP3PP/R2Q1RK1 b - - 1 12 | Be6 | Is the move from h6 to g4 legal? | No | legality |
5rk1/ppq2ppp/2pr1b2/4BN2/4P3/6Q1/PPP2PPP/4R1K1 b - - 0 18 | Rd1 | Is the move from f7 to d5 legal? | No | legality |
r3kb1r/p2q1ppp/Ppn1p3/3n4/3N4/2P5/1P3PPP/RNBQ1RK1 w kq - 0 15 | Nb5 | What piece is on b3? | Empty | occupancy |
b1r5/2r1kp2/3p1p1p/1pq1pP1N/4PbPP/pPPR4/P1B1Q3/1K1R4 w - - 0 31 | b4 | Does Black have any passed pawns? | No | structure |
8/7R/P2B4/5P2/6r1/5b2/5k2/2K5 b - - 0 55 | h5h7 | What is the material balance in this position? | White is up 2 pawns of material | material |
3rk2r/ppp2p1p/5np1/4p3/PP2q3/2P2Q1P/3B1PP1/3RK2R w Kk - 0 19 | c6e4 | Is the White king in check? | Yes | check |
1k1r3r/2p2p2/Q2bb2p/1N1p2q1/2nP2pN/3R2P1/PPP2PP1/1K2R3 w - - 9 23 | Rxe6 | Is the White king in check? | No | check |
r2qk2r/pQpnbpp1/4p1bp/8/2BPp2P/2P3N1/PP3PP1/R1B1K2R b KQkq - 0 11 | O-O | Identify any Black knight outposts on the board. | None | outposts |
2rq1rk1/5ppp/p2p1b2/n1pQ4/1p2PP2/4B2P/PPB3P1/1R2R1K1 b - - 4 19 | Nc6 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r4rk1/1bppqppp/p5n1/2b5/R3PP2/1BP5/1P1NQ1PP/2B2R1K b - - 0 16 | Bc6 | Is the b-file open, semi-open, or closed? | semi-open for Black | files |
r3bbk1/1p4r1/pB1p2n1/3Pp2p/4Pp2/5Pp1/1PR1B1PP/4NR1K b - - 9 31 | Be7 | Identify any Black knight outposts on the board. | b5 | outposts |
2r3k1/3b1p1p/3P2p1/3Q4/p3P2q/Ppb1B3/1p4PP/1R3K1R b - - 4 7 | Bd4 | What is the material balance in this position? | White is up 1 pawn of material | material |
r1b2b1r/1pq1pn1p/p4np1/3P4/2P5/BB6/5PPP/1k2K2R w K - 0 22 | O-O# | Is the White king in check? | No | check |
4r3/6n1/p5nk/1pppp2p/1P2N1R1/PBKPP2R/2P2rP1/8 w - - 0 36 | Nxf2 | Is the White king in check? | No | check |
1k2q1r1/3bb3/p3p3/1p1pP3/1PpP3p/PPQ2R1B/4N2K/6r1 w - - 0 33 | g4g1 | What is the material balance in this position? | Black is up 6 pawns of material | material |
3r1rk1/ppp3pp/1b6/5p2/4P3/3N4/PPP3PP/R1B1RK2 b q - 0 2 | fxe4+ | Does Black have any isolated pawns? | No | structure |
1r3n1k/pp1q4/3NpP2/3pP2P/3P4/4B3/8/6RK w - - 5 40 | h6 | Is the move from d6 to c8 legal? | Yes | legality |
r1bq1rk1/1p2bppp/p2ppn2/8/3nP1P1/2N1BP2/PPPQ3P/2KR1B1R w - - 0 11 | Bxd4 | Are there any open files in this position? | No | files |
2k1K3/p1b4p/1pR3p1/1P2p3/P3N3/4P1P1/5P2/r7 b - - 11 45 | Rd1 | Does Black have any isolated pawns? | Yes: e5 | structure |
2rqk2r/p2bnp2/1ppBp2p/4P1p1/4B3/P3P2P/1PQ2PP1/R3K2R w KQ - 3 24 | O-O | Identify any White knight outposts on the board. | None | outposts |
r5k1/1b3p1r/p2N4/1p2QRB1/7p/1PK5/1PP3qP/8 w - - 5 29 | Bf6 | Are there any open files in this position? | Yes: d, e, g | files |
8/pkp5/1p6/8/8/P7/1P3r2/5K2 w - - 0 35 | Kxf2 | Is the White king in check? | Yes | check |
r3k1nr/ppp2ppp/2b1pq2/8/1b1PP3/2N1BPP1/PP5P/R2QKB1R b KQkq - 2 10 | O-O-O | Identify any Black knight outposts on the board. | None | outposts |
5rk1/5pbp/p3p1p1/1p4P1/4r3/1P1R3P/P1P1n3/2KR4 w - - 2 27 | g3e2 | Is the White king in check? | Yes | check |
8/7p/8/pp2k1P1/2p5/P1P2K2/7P/8 w - - 3 47 | Ke3 | Identify any White knight outposts on the board. | f6, h6 | outposts |
r3r1k1/pp3ppp/3b1n2/7q/1P1N2b1/N1PQ4/3P1PPP/R1B2K1R b - - 2 17 | Bf5 | Identify any Black knight outposts on the board. | None | outposts |
r1bq1rk1/2p2ppp/1p2pn2/p1Pp4/3P4/P1Q1P3/1P1N1PPP/R3KB1R w KQ - 0 13 | Rc1 | What is the material balance in this position? | Equal | material |
rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/5NP1/PP2PP1P/RNBQKB1R b KQkq - 1 4 | Bb4+ | Is the White king in check? | No | check |
2r3k1/3q1pp1/p1b4p/P3Q3/3N4/3p2P1/4PP1P/1R4K1 w - - 0 31 | exd3 | Does Black have any isolated pawns? | Yes: a6, d3 | structure |
r1bqr1k1/pp1n2pp/2pbp3/4Np2/2PP4/1P3pP1/PB2P1BP/R2Q1RK1 w - - 0 13 | Bxf3 | Does Black have any isolated pawns? | No | structure |
rn3k1r/pp3ppp/3b1q2/2pP4/2B3b1/5N2/P2B1PPP/2RQR1K1 b - - 7 14 | a1c1 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r7/5pk1/p1R1pqp1/7p/3r4/P1Q5/1P3PPP/5RK1 w - - 0 24 | b4 | What is the material balance in this position? | Equal | material |
r1bq1rk1/pp3p1p/4p1p1/2p1b3/3nN3/3P2P1/PPP2BBP/R2Q1RK1 b - - 1 15 | f5 | Is the move from c5 to b4 legal? | No | legality |
rnbq1rk1/pp3ppp/4pn2/3p2B1/2P5/P1N5/1P2PPPP/R2QKB1R b KQ - 1 9 | h6 | Does Black have any passed pawns? | No | structure |
r6k/1R4pp/pp6/4r3/8/2N5/PP3PPP/5RK1 b - - 0 20 | d7b7 | What is the material balance in this position? | White is up 4 pawns of material | material |
8/R4k1p/3p1bp1/8/2b2P2/7P/4N3/4rBK1 b - - 4 38 | Ke6 | Is the f-file open, semi-open, or closed? | semi-open for Black | files |
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