fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
r4rk1/2p1bpp1/p3pn2/1p1qNn1p/3P1P2/2PQ1N2/PP4PP/R1B2RK1 w - - 0 18 | h3 | Is the move from h2 to h2 legal? | No | legality |
3r4/1b3kpp/8/npp5/4n3/2P4P/1P3PP1/RN3RK1 w - - 0 20 | Rxa5 | Are there any open files in this position? | Yes: a, d, e | files |
2r2kr1/1p2npbp/p7/3R1p2/5Q2/8/PPP3PP/1KN1qB1R w - - 4 22 | Qd2 | Is the Black king in check? | No | check |
r3k2r/4bp1p/p2ppp2/q2B4/1p1NRP2/8/PPPQ2PP/1K1R4 b kq - 0 17 | Qxd5 | Is the move from f7 to a2 legal? | No | legality |
8/8/7B/2b2b2/p1p5/P1P5/kP6/2K5 b - - 3 78 | Bxa3 | Is the move from f5 to h7 legal? | Yes | legality |
rnbqk2r/pppp2pp/8/3QPp2/4n3/5N2/PPP1KbPP/RNB2B1R w kq f6 0 7 | Nc3 | Is the White king in check? | No | check |
2k1rr2/1pp5/1pnp4/4p3/PP2P1Q1/2P5/5PPP/R4RK1 b - - 4 23 | h4g4 | Is the Black king in check? | Yes | check |
r1bq3r/ppp2kpp/2n5/3p4/4n3/1Q3N2/PB3PPP/RN3K1R b - - 1 11 | Re8 | Identify any Black knight outposts on the board. | c4 | outposts |
8/5pk1/5p2/q6p/1b3N1P/p2RP1P1/R4P1K/8 b - - 5 46 | Kh6 | What piece is on f5? | Empty | occupancy |
5b2/2nb4/kp1p1p1p/3Pp1pP/BBP1P1P1/K4PN1/8/8 b - - 1 51 | Bxa4 | Identify any Black knight outposts on the board. | a5 | outposts |
r6k/pp6/7p/3P1Np1/8/PP5P/1B5K/8 b - - 0 35 | Kh7 | Are there any open files in this position? | Yes: c, e, f | files |
5r1k/2p1Q1pp/8/p7/2q5/P7/2KB3P/8 w - - 4 29 | f1c4 | Is the White king in check? | Yes | check |
rnb2k2/pp5q/2p1pP2/3pN1p1/2PP2Q1/2P1P2P/P4P2/R3K2R b KQ - 2 18 | Qh4 | Is the move from b8 to a6 legal? | Yes | legality |
5N2/6p1/3B1p1k/4p2p/4p2P/1b2P1P1/2R2PK1/3rb3 w - - 10 46 | Rc6 | Is the move from c2 to c1 legal? | Yes | legality |
5rk1/1R4pp/2p1p3/4Pp2/2P1P3/2n1P1P1/r5BP/5RK1 b - - 0 26 | fxe4 | Is the White king in check? | No | check |
r5k1/1N3pp1/8/8/2R3b1/4rNP1/3RnnBK/8 b - - 1 33 | Be6 | Is the f-file open, semi-open, or closed? | semi-open for White | files |
r1bq1rk1/pp2npbp/3p2p1/2pPp2n/2P1P3/2N2NP1/PP1BBP1P/2RQ1RK1 b - - 0 11 | Nf6 | What is the material balance in this position? | Equal | material |
2r1k2r/pp1b1ppp/1q2p1n1/2bp4/8/2P2N2/PPQNBPPP/R4RK1 b k - 5 14 | b1d2 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r4r1k/ppqb2pN/2n5/4pp2/1bB2P2/4Q3/PPPN2PP/2KR3R w - - 1 2 | Qh3 | Is the move from b2 to a8 legal? | No | legality |
5r2/1p1PQ3/p6k/2P5/P7/1P3p2/2P2KrP/8 w - - 1 37 | Kf1 | Does Black have any passed pawns? | Yes: f3 | structure |
r2q1rk1/pp2bpp1/2n1bn1p/3p4/5B2/2NBPN2/PP1Q1PPP/R4RK1 b - - 3 12 | Nh5 | Does White have any passed pawns? | No | structure |
r1b2k1r/p2p3p/1qnN2p1/1p2PBB1/3p4/5N2/PPP2KPP/R6R w - - 8 19 | Be4 | Identify any Black knight outposts on the board. | e3 | outposts |
r3b2k/pp4bp/1qN1B2p/nP1p2r1/3P4/P3Q3/R4PPP/1N3RK1 w - - 1 21 | Nb4 | Does Black have any isolated pawns? | Yes: d5, h6, h7 | structure |
rnbqk2r/p1p2ppp/1p2p1n1/3pP3/3P2Q1/P1P5/2P2PPP/R1B1KBNR w KQkq - 2 8 | h4 | What is the material balance in this position? | Equal | material |
2rqr1k1/pp1n1pp1/2p2n1p/P3p3/1PP1P3/2Q2BPP/3N1P2/R3R1K1 w - - 0 20 | c5 | Is the d-file open, semi-open, or closed? | open | files |
r2qk2r/1b1nbpp1/p1p1p2p/1p2B3/1PpPP3/P1N5/2Q1BPPP/3R1RK1 b kq - 2 14 | a1d1 | What is the material balance in this position? | Black is up 1 pawn of material | material |
2kr3r/pppn1ppp/6n1/2bP4/5p2/3P3P/PPP3BP/RNB2R1K b - - 4 11 | Rhe8 | Does Black have any passed pawns? | Yes: f4, f7 | structure |
5r1k/1R4R1/7p/p2p3P/P2P4/7K/1P4P1/8 b - - 0 42 | Rf3+ | What piece is on a7? | Empty | occupancy |
r1bq1rk1/2p1bppp/p1np1n2/4p3/Pp2P3/1B1P1N2/1PP2PPP/RNBQR1K1 w - - 0 10 | a5 | Is the move from g2 to g4 legal? | Yes | legality |
1k6/p4p2/4p3/8/np6/1N3P2/K5P1/1B1r4 w - - 4 42 | Bc2 | Is the move from b3 to a1 legal? | Yes | legality |
rqr1n1k1/1b1nbppp/pp1pp3/6P1/2PNP3/2N1BP2/PP2B2P/1KRQ3R w - - 1 16 | h4 | Is the c-file open, semi-open, or closed? | semi-open for Black | files |
rnb1k1nr/pp1ppp1p/1q6/1N4B1/2P5/8/Pb1NPPPP/R2QKB1R b KQkq - 1 7 | Bxa1 | What piece is on f7? | Black Pawn | occupancy |
rn1qk1nr/Np3pp1/2bp1b1p/3Qp3/4P3/4BN1P/PPP2PP1/R3KB1R w KQkq - 1 13 | d7c6 | What is the material balance in this position? | White is up 1 pawn of material | material |
r1bqk1nr/pp2ppbp/2np2p1/2p5/2B1PP2/2N2N2/PPPP2PP/R1BQK2R w KQkq - 4 6 | O-O | Is the Black king in check? | No | check |
r2qk2r/1b3ppp/p1n1pn2/1pb5/8/1NN1P3/PP2BPPP/R1BQ1RK1 b kq - 1 12 | Bd6 | Is the White king in check? | No | check |
r2qr1k1/p4ppp/b1n5/3p4/N1p1n2N/1P4P1/P3PPBP/2RQR1K1 b - - 1 17 | Qa5 | What piece is on e6? | Empty | occupancy |
1r5k/2R5/4p3/5p1p/2B5/1pr3P1/1R4KP/8 b - - 1 42 | h4 | Is the move from e6 to f2 legal? | No | legality |
2b1r1k1/3q2n1/p2p2pQ/2pP2N1/2P3p1/1Pp4P/P4P2/1R4K1 b - - 1 30 | Qf5 | Are there any open files in this position? | Yes: e | files |
5rk1/p1q1bppp/2p5/2P2Q2/5Nn1/1PN3P1/P4P1P/3R1RK1 b - - 0 20 | e2f4 | What is the material balance in this position? | White is up 6 pawns of material | material |
r1bq1rk1/1p3ppp/p1nbpn2/4N3/P2P4/2N1B3/1PB2PPP/R2QR1K1 b - - 10 16 | h6 | What piece is on f2? | White Pawn | occupancy |
5rk1/6pp/p4b2/1p1P4/3p4/P1PP3P/2PBr1P1/R4RK1 w - - 1 23 | Rf2 | What piece is on f8? | Black Rook | occupancy |
6rr/1k3p2/1pb1p1np/p1p1P2R/2P3R1/2P1B3/P1BK1PP1/8 b - - 1 26 | Nxe5 | Is the d-file open, semi-open, or closed? | open | files |
R4k2/7p/8/2p5/2Pp1P2/3P2P1/Pr2r2P/R5K1 b - - 8 33 | a7a8 | Is the White king in check? | No | check |
r1b1k1nr/pp3ppp/4p3/3pP3/1b1q4/N7/PP1B1PPP/R2QKB1R w KQkq - 0 10 | Qa4+ | Is the White king in check? | No | check |
N5k1/pp3p2/2n2pp1/3q4/3p4/P3bPQ1/1PK3PP/3R2NR b - - 4 24 | Na5 | What piece is on b7? | Black Pawn | occupancy |
2r1r1k1/2p2p2/np4p1/p3NnPp/1qP2P1P/1PQ5/P2R3K/2B1R3 w - - 8 8 | Qb2 | What is the material balance in this position? | Equal | material |
8/8/4p3/4k3/5prp/4K3/8/7R w - - 0 63 | f5f4 | Is the Black king in check? | No | check |
3R4/p7/2p1k2R/B4p2/2p2P2/b7/1r5P/6K1 b - - 2 33 | h7h6 | Is the White king in check? | No | check |
8/2P3R1/1K6/6p1/5k2/2r5/8/8 w - - 7 72 | Rg6 | What piece is on f3? | Empty | occupancy |
rnbqkb1r/1p3ppp/p2p1n2/4p3/3NP3/2N4P/PPP2PP1/R1BQKB1R w KQkq - 0 7 | Nde2 | What is the material balance in this position? | Equal | material |
2b1k2r/3n1p2/pq1pp2p/6bB/3RPR2/1PN1Q3/2P3PP/2K5 w k - 1 24 | Nd5 | Identify any Black knight outposts on the board. | e5 | outposts |
8/pp1nkpQp/4pn2/8/1b1P4/7N/PP3P1P/1KBq4 b - - 4 22 | g1h3 | What is the material balance in this position? | Black is up 3 pawns of material | material |
3B1k2/8/4p2P/1p1n2P1/p1p5/P7/1P6/1K6 b - - 0 39 | Kf7 | What is the material balance in this position? | Equal | material |
r4rk1/pp2p1bp/2n1p1p1/q7/P2PP3/5P2/4N1PP/1RBQ1RK1 b - - 0 17 | Nxd4 | Is the move from a5 to d8 legal? | Yes | legality |
1rbq1rk1/2pn1pb1/3p2pp/np2p3/3PP3/2N1BNPP/PP3PB1/2RQR1K1 w - - 2 15 | dxe5 | Is the move from d1 to c2 legal? | Yes | legality |
8/pp4P1/8/1k6/2p2N2/1n2R1P1/3r4/1K6 b - - 0 49 | Kb4 | Is the White king in check? | No | check |
2r1r1k1/p4p1p/b5p1/q2pn3/N1pNn2P/1P4PB/P3PP2/2RQR1K1 b - - 2 21 | Rc7 | Is the White king in check? | No | check |
1r1qr1k1/p4pb1/3p1npp/2pP2B1/b1PpPP2/3B2N1/P2Q2PP/R4RK1 w - - 0 18 | Bxf6 | What piece is on h2? | White Pawn | occupancy |
b1r1r1k1/3n1pb1/2p1n1pp/4p3/1qN1P3/4QNPP/1B3P2/R3RBK1 w - - 0 30 | Ba3 | Does Black have any isolated pawns? | Yes: c6 | structure |
5rnk/1p5p/3p3r/p1p1p1b1/2P1PpK1/5P2/PP1QNB2/5R2 w - - 0 44 | Kxg5 | Does Black have any passed pawns? | Yes: h7 | structure |
rnbqkbnr/ppp2pp1/3p3p/3Np3/2BPP3/5N2/PPP2PPP/R1BQK2R b KQkq - 0 6 | c6 | Is the move from e8 to g1 legal? | No | legality |
3r4/5pk1/6p1/7p/2P1Pn2/R1K5/P4NPP/8 b - - 0 43 | Nxg2 | Identify any Black knight outposts on the board. | None | outposts |
2Q3k1/B4r1p/p7/8/PP3p2/4pq2/7P/R5K1 b - - 3 36 | c4c8 | Is the White king in check? | No | check |
7k/5Bp1/p5P1/8/1P6/1KP5/8/1q6 w - - 9 55 | Kc4 | Are there any open files in this position? | Yes: d, e, f, h | files |
r1bqkb1r/3n1ppp/p3pn2/1N2P3/3p4/3B1N2/PP3PPP/R1BQK2R b KQkq - 0 11 | axb5 | Are there any open files in this position? | Yes: c | files |
rnb1kb1r/p1pp1p1p/6p1/1B3Nqn/4Pp1P/3P4/PPP3P1/RNBQ1K1R b kq - 0 10 | Qf6 | Is the f-file open, semi-open, or closed? | semi-open for White | files |
q2bnrk1/3b4/p2p2p1/B1pPp2p/n1P1Pp2/3N1P2/P1Q1BNPP/1R4K1 w - - 0 26 | Bd2 | Are there any open files in this position? | Yes: b | files |
5Q2/6R1/8/8/8/8/1K4k1/8 b - - 2 47 | c7g7 | Is the Black king in check? | Yes | check |
2bq3k/2p4p/p2p4/7P/1nBPPQP1/r1p5/8/1K1R2R1 b - - 2 25 | Be6 | Is the White king in check? | No | check |
r1bqr1k1/1p3ppp/5n2/pP6/P1BPp3/8/1B3PPb/RN1Q1R1K b - - 0 18 | Ng4 | What piece is on c5? | Empty | occupancy |
r1bq1rk1/ppp1nppp/4p3/b7/2PP4/1QN3P1/P2P1PBP/R1B2RK1 b - - 4 11 | Nf5 | Is the White king in check? | No | check |
8/R2k4/3n2p1/3K1p2/Pp1N1P2/1P6/8/3r4 b - - 1 55 | Kd8 | Is the e-file open, semi-open, or closed? | open | files |
r3k1nr/pp2p1bp/n1p2pp1/q3P3/N2P2b1/P4N2/1PPBB1PP/R2QK2R b KQkq - 5 11 | Qd5 | Is the f-file open, semi-open, or closed? | semi-open for White | files |
rn1qkb1r/1b1n1ppp/p2pp3/1p6/3NP1P1/2N4P/PPP2PB1/R1BQ1RK1 w kq - 4 10 | f4 | Is the d-file open, semi-open, or closed? | semi-open for White | files |
3r1n2/5Pk1/p2p1bp1/3P1B2/2p2PQP/6P1/4R2K/q7 w - - 0 36 | Bxg6 | Is the move from f4 to a1 legal? | No | legality |
rnbq1rk1/pp2b2p/3p1np1/2p1pp2/2PP4/P1NBPP2/1PQ1N1PP/R1B1K2R w KQ - 0 10 | d5 | Identify any Black knight outposts on the board. | None | outposts |
r4rk1/4ppbp/3p2p1/q1pPn3/4P3/2N3P1/PP3PKP/R1BQ1R2 b - - 2 16 | Rfb8 | Identify any Black knight outposts on the board. | None | outposts |
r1b1kb1r/pp3ppp/2nP4/q1p1p3/1nP1N3/PQ3N2/1P1P1PPP/1RB1KB1R b Kkq - 1 10 | Na6 | Are there any open files in this position? | No | files |
r3k2r/2qb3p/p3p1p1/1pbpP2Q/3N1P2/2P1B3/P5PP/R4R1K w kq - 0 20 | Qh6 | Is the move from f1 to f2 legal? | Yes | legality |
r1r2nk1/1bq4p/pp3pp1/4P3/1PP1n2N/4P2Q/1B2B1PP/2RR2K1 b - - 0 26 | fxe5 | Identify any Black knight outposts on the board. | e5 | outposts |
2r3k1/2q3p1/4Q2p/2p5/np1p1P2/6PN/5R1P/6K1 b - - 0 34 | c4e6 | Is the Black king in check? | Yes | check |
rnbqk2r/1p2bppp/p2ppn2/8/3NP3/2N5/PPP1BPPP/R1BQ1RK1 w kq - 2 8 | a4 | Identify any White knight outposts on the board. | None | outposts |
3R4/8/8/3k4/2p5/r7/2K5/8 b - - 29 93 | c8d8 | Is the White king in check? | No | check |
r7/3P4/3k1Bp1/1ppbRpP1/8/7P/p1r5/3RK3 b - - 3 49 | Kxd7 | Is the Black king in check? | No | check |
1r4k1/p1p2p1p/5p2/3p4/1P1P4/3BN3/P4qPP/2KR3R b - - 0 23 | Qxe3+ | What is the material balance in this position? | White is up 1 pawn of material | material |
7R/8/2p5/1p4k1/5p2/P1P3p1/1P2r1K1/8 w - - 4 48 | e3e2 | Is the White king in check? | Yes | check |
r2k1b1r/ppqB2pp/2p1Q3/8/1P2p3/2B5/P1P2P2/3RK3 w - - 1 27 | Qe8# | Identify any Black knight outposts on the board. | f3 | outposts |
rqbn1k1r/p2p2pp/2pP1p2/1pb1P3/Q1B5/N1P2N2/P4PPP/3R1RK1 w - - 0 18 | Bxb5 | Are there any open files in this position? | No | files |
6k1/p4p1p/1Q6/6q1/4P3/7K/PPP5/R4R2 b - - 0 4 | Qh5+ | Is the e-file open, semi-open, or closed? | semi-open for Black | files |
r1bq1rk1/pp1n1ppp/3b1n2/2ppp3/3P4/2PBPN2/PP1N1PPP/R1BQR1K1 w - - 0 9 | e4 | Are there any open files in this position? | No | files |
8/5pk1/4pN1p/p3P1pP/1pR1K2r/1P6/4RP2/6r1 w - - 14 43 | h3h4 | Is the White king in check? | Yes | check |
rnb2k2/pppq1pbp/6p1/3Np3/2P1n3/5N2/PP2BPPP/R2QK2R w KQ - 0 13 | Qc2 | What is the material balance in this position? | White is up 1 pawn of material | material |
r3k2r/pp2n3/2p4p/4B3/4B1nP/2N2p2/PP3K2/3R4 w - - 8 27 | f6g4 | Is the White king in check? | Yes | check |
r1b5/ppk3B1/n2q4/2p4r/2Pp2p1/PQ6/1P1K1PBP/4R2R b - - 1 23 | Rg5 | Does Black have any isolated pawns? | Yes: g4 | structure |
r1N1nk2/p2Q1pbp/2R5/8/1q6/4P3/n4PPP/5RK1 w - - 3 26 | Rc4 | Does Black have any passed pawns? | Yes: a7 | structure |
2rq1rk1/5pp1/2n2n1p/p1Rp4/3P1N2/5PP1/P2Q3P/4RBK1 b - - 12 32 | Qb6 | What is the material balance in this position? | Equal | material |
rn1r2k1/2p2pbp/p5p1/1p2N3/4b3/2P3NP/PP3PP1/R1B1R1K1 w - - 0 19 | Rxe4 | Is the d-file open, semi-open, or closed? | open | files |
8/2pb1kpp/7r/pp1p4/3B4/2PB4/PP3K1P/5N2 w - - 0 29 | Be2 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r1bq2k1/pp2nr1p/4p1p1/2bp4/3p1P2/1B1P2N1/PPPBQ1PP/R4RK1 w - - 1 16 | Nh1 | Are there any open files in this position? | No | files |
8/8/p3pppp/1p2k2P/2p1P2b/8/PP2K3/2B5 w - - 0 40 | hxg6 | Identify any White knight outposts on the board. | None | outposts |
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