fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
r2k3r/pp1q1Bpp/1b1B4/3n4/6b1/6Q1/P4PPP/4R1K1 w - - 0 23 | Bxd5 | Is the move from d6 to b4 legal? | Yes | legality |
5r2/5p2/8/6PP/1p1p1kP1/1B6/PP6/4K3 w - - 1 36 | g6 | Does Black have any passed pawns? | Yes: d4 | structure |
8/pnp2pk1/1p1q2p1/1P6/4R3/P2rQ2P/5PP1/4R1K1 w - - 1 29 | d1d3 | What is the material balance in this position? | White is up 2 pawns of material | material |
rnbqk2r/pp3ppp/2pbp3/3p4/2P3n1/1P2PN2/PB1P1P1P/RN1QKB1R w KQkq - 0 7 | Rg1 | What piece is on a7? | Black Pawn | occupancy |
r2q1rk1/pp3pp1/1npp1n1p/b2P1N2/2BPp2B/2P2P2/PP4PP/R2Q1RK1 b - - 1 14 | e3 | Is the e-file open, semi-open, or closed? | semi-open for White | files |
r2r2k1/pb2bppp/1p2pn2/3q4/3n4/PP1B1N2/3N1PPP/RQB2RK1 w - - 2 14 | Ne1 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r2r2k1/3qbppB/1p5p/4P3/8/P4Q1P/6P1/R1BR2K1 b - - 0 25 | d3h7 | Is the Black king in check? | Yes | check |
r2qnrk1/3nbppp/p2pb3/4p1P1/1p2PP2/1N2B3/PPPQN2P/2KR1B1R b - - 0 5 | a5 | Identify any White knight outposts on the board. | None | outposts |
r4rk1/p3q1pp/1pb5/2pn1p2/8/3BPN2/PP2QPPP/2RR2K1 w - - 2 20 | Nd4 | Is the move from g2 to f5 legal? | No | legality |
1r1q2k1/pp2p1bp/2npb1p1/2p5/2P1P3/1PN1BrPP/P3NPK1/R2Q1R2 b - - 1 16 | Qd7 | Does White have any isolated pawns? | No | structure |
8/6k1/6Rp/8/6PK/4r2P/8/8 b - - 0 63 | a6g6 | Is the Black king in check? | Yes | check |
r3kbnr/ppp2ppp/3p1q2/1Q1P4/4PP2/8/PPP3PP/RNB1K2R b KQkq - 2 11 | e2b5 | Is the White king in check? | No | check |
r2r2k1/3nqp1p/pp1npp2/2p4N/2P3P1/P1NPP3/1B2Q2P/5RK1 w - - 6 25 | Qg2 | Identify any Black knight outposts on the board. | a5 | outposts |
2rq1rk1/pp1n1ppp/5n2/3p4/8/1Pb1PN2/PB1N1PPP/1R1Q1RK1 b - - 7 14 | Qa5 | Are there any open files in this position? | Yes: c | files |
2q3k1/5p2/1p2P1p1/8/P4p1B/2p1n2P/6PK/6Q1 w - - 0 45 | e7 | Is the h-file open, semi-open, or closed? | semi-open for Black | files |
4b2k/7p/3q3P/1p1pRp2/1P1B4/2P3r1/7K/8 w - - 0 2 | Rxe8# | What is the material balance in this position? | Black is up 10 pawns of material | material |
2r1r1k1/1p4pp/1pq2p2/3pn3/5N2/PP3P2/2PQ2PP/R4R1K w - - 0 25 | Rf2 | What piece is on b6? | Black Pawn | occupancy |
5rk1/1pp2ppp/p2p2P1/4q2P/2B2n2/4r3/PPPQ4/2K2R1R b - - 0 24 | d5 | What piece is on c5? | Empty | occupancy |
8/5k2/1P3P1p/3N4/4PQp1/3K1nP1/8/3q4 w - - 7 47 | e1d1 | Is the White king in check? | Yes | check |
r5k1/1pp3b1/3p4/1P2p1pK/2P5/2NPPB1q/2QB4/1R2R3 w - - 1 27 | Kg6 | Identify any White knight outposts on the board. | None | outposts |
r4rk1/pp1qppbp/2npbnp1/8/2P5/1PN3P1/PBN1PPBP/R2Q1RK1 b - - 2 11 | Bh3 | Is the move from f8 to c1 legal? | No | legality |
8/2p2p2/1p5p/p2Pp2P/n1PK1pB1/2P2P2/P3k3/8 w - - 0 48 | d6e5 | Is the Black king in check? | No | check |
8/1br5/3N2p1/p6k/1P2p2p/2P1R2P/6P1/6K1 w - - 1 48 | bxa5 | Is the move from g1 to f1 legal? | Yes | legality |
r1bq1rk1/ppp1ppbp/n2p1np1/6B1/2PPP3/2N2N1P/PP3PP1/R2QKB1R b KQ - 2 7 | c5 | What piece is on a5? | Empty | occupancy |
1r4k1/8/1p6/p1p1bP1q/2P5/P2P1p2/3Q1K2/1R4R1 b - - 2 34 | Kf7 | Is the Black king in check? | Yes | check |
2b3r1/ppN2kpp/4p3/3nPpQ1/8/8/q4PPP/2R2RK1 w - - 2 21 | Nb5 | Identify any Black knight outposts on the board. | None | outposts |
r7/1b1p2qp/p4k1B/1p3B2/8/7P/PP3PP1/4R1K1 w - - 1 28 | Bxg7+ | Identify any Black knight outposts on the board. | None | outposts |
r1bq1rk1/1pp2pb1/n2p1np1/p2Pp1Bp/2P1P2P/2N3N1/PP2BPP1/R2QK2R b KQ - 1 10 | Nc5 | Is the move from c8 to f5 legal? | Yes | legality |
r7/p4pk1/4pn1p/3p2p1/1P2b3/P1P5/2KN2qP/R5R1 w - - 2 28 | f3e4 | Is the Black king in check? | No | check |
r4k2/r4ppp/p1b2n2/2NpR3/PP6/3B1P2/6PP/R5K1 w - - 1 23 | Re2 | Are there any open files in this position? | Yes: c, e | files |
5k2/p2r2pp/r3p1b1/4p3/6B1/4P1P1/PR3P1P/2R3K1 w - - 9 28 | Bf3 | Are there any open files in this position? | Yes: b, c, d | files |
r1bqk2r/p4ppp/2p5/3pQ3/8/1P3P2/1PP3PP/RN2K2R b KQkq - 0 15 | d4e5 | Is the Black king in check? | Yes | check |
r4rk1/1b1nbppp/pp2pn2/8/3NP3/1N3P2/PP2B1PP/R1BR2K1 b - - 0 14 | Rfc8 | Is the move from g7 to g6 legal? | Yes | legality |
3rk2r/2pb1p2/p1pb1q2/4p2p/BP2P1p1/P2R2Q1/2P1NPPP/3R3K w k - 0 21 | c4 | Does Black have any isolated pawns? | Yes: a6, c6, c7 | structure |
r1b3k1/pp1q1pbp/2p2np1/3pN3/8/2PPr1B1/PPQ1B1PP/2KR3R b - - 1 16 | f3e5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
7r/1Bk1R3/pn1p2pp/5b2/2P5/2P5/P4PPP/R1B3K1 b - - 0 21 | e1e7 | Is the White king in check? | No | check |
r1bq1rk1/ppp3b1/3n2n1/3Pp1pp/P3Pp2/2N2P2/1P2BBPP/R2QNRK1 w - - 0 16 | Nb5 | Are there any open files in this position? | No | files |
8/3r1nk1/2p3p1/R1P2pP1/P3rP2/1BK4R/8/8 w - - 1 52 | Ra8 | What piece is on d8? | Empty | occupancy |
Q7/p2n3k/3P2qn/P1p2p2/5P1p/2b4P/5NP1/5RK1 w - - 0 32 | Qxa7 | Does White have any passed pawns? | Yes: d6 | structure |
rb5k/2qp2pp/4r1n1/1QP2p2/P2B1P2/1NP4P/6P1/R4RK1 w - - 3 26 | g3 | What is the material balance in this position? | White is up 2 pawns of material | material |
r3kbnr/pp3ppp/2nq4/1Bppp3/8/1P2PQ1P/PBPP1PP1/RN2K2R w KQkq - 2 8 | e4 | Are there any open files in this position? | No | files |
5b2/pkp3pp/4r3/1p1N4/2p2PP1/P6P/1PP2K2/3R4 b - - 9 32 | Kc6 | Does Black have any passed pawns? | No | structure |
r3r1k1/1p2p3/2npb1PB/2q2P2/p1P1n2Q/8/PPNbB3/1R3RK1 w - - 1 25 | Kg2 | Are there any open files in this position? | Yes: h | files |
q2rr1k1/p1P1bppp/1p2p1n1/1N6/P2N4/2n3BP/4QPP1/2R1R1K1 w - - 1 28 | Rxc3 | Is the e-file open, semi-open, or closed? | semi-open for White | files |
r1bqk2r/pppp2pp/1bP2p2/3Qp1B1/8/2P2N2/PP2KnPP/RN3B1R w kq - 0 10 | Nxe5 | What is the material balance in this position? | White is up 1 pawn of material | material |
2r1r1k1/2R3pp/2p1p3/4Pp2/2P1p3/2n1P1P1/5PBP/5RK1 w - - 8 29 | Ra7 | What piece is on c7? | White Rook | occupancy |
8/3k2K1/p2p2P1/Pp1Pp3/1P2pP2/6P1/8/8 w - - 0 54 | Kf7 | Is the move from g7 to f6 legal? | Yes | legality |
2k2b1r/pp3p1p/2n2p2/4p3/2P5/P2r4/1P2NPPP/RN2K2R b KQ - 0 12 | Na5 | Does Black have any isolated pawns? | Yes: h7 | structure |
rnb1kb1r/pp3ppp/2p2n2/3q4/4p3/2N3P1/PPNPPP1P/R1BQKB1R b KQkq - 3 7 | Qh5 | Does Black have any isolated pawns? | No | structure |
rn3r1k/p4p2/1p1p1q2/2pP1B1p/Q1P2P1b/7R/P4P1P/6RK w - - 5 22 | Qd1 | What is the material balance in this position? | Black is up 3 pawns of material | material |
4r1k1/1p1r1np1/p1p1pq1p/2Pp1p2/PP1P1P2/3QP1BP/6PK/2RR4 w - - 1 28 | Rb1 | What piece is on b5? | Empty | occupancy |
1rb2rk1/p5pp/2n1p1q1/1p6/2pP4/P1N1BP2/1P2Q1PP/3R1RK1 b - - 2 21 | Ne7 | Does Black have any isolated pawns? | Yes: e6 | structure |
2kr3r/p4pbp/1pp1b3/2p1Pp2/2PB1P2/2N5/PP3KPP/3R1B1R b - - 0 21 | Rxd4 | Is the move from g7 to c3 legal? | No | legality |
r1b1kbnr/1pp2ppp/p1p5/8/3qP3/5N2/PPP2PPP/RNB1K2R w KQkq - 0 7 | Nxd4 | Is the move from a2 to a5 legal? | No | legality |
r2qkbnr/pp2pppp/1np1b3/4N3/2p5/N1Q3P1/PP1PPPBP/R1B2RK1 w kq - 10 10 | Naxc4 | Is the d-file open, semi-open, or closed? | semi-open for Black | files |
2r2rk1/6p1/p3p1pp/qp1pP3/b1nP1PP1/2P1BN2/4Q2P/R4RK1 w - - 0 23 | b7b5 | Identify any Black knight outposts on the board. | a4 | outposts |
8/8/p7/8/1P1P2k1/3K4/7r/5R2 w - - 9 13 | d5 | Are there any open files in this position? | Yes: c, e, f, g, h | files |
r4rk1/pp1qbppp/4pnb1/3pn3/5BP1/1QNP3P/PP2PPB1/2R2RK1 w - - 0 15 | Bxe5 | Is the move from e2 to e3 legal? | Yes | legality |
r4rk1/bpq2ppp/p1n5/P3p3/1P2B3/2P4Q/5PPP/R1BR2K1 b - - 2 19 | g6 | Is the move from a8 to c8 legal? | Yes | legality |
2r4r/pp2R1k1/3q2p1/3p2P1/2nP3p/2PQ3P/PP3P2/4R1K1 b - - 0 31 | Kf8 | What piece is on d4? | White Pawn | occupancy |
3rrbk1/5pp1/Rnp2n1p/1p2p3/4P3/1PN2N1P/1BP2PP1/4R1K1 b - - 1 22 | Nfd7 | Does White have any passed pawns? | No | structure |
r1bqkb1r/pp2pppp/2n2n2/2ppP3/8/2PB1N2/PP1P1PPP/RNBQK2R b KQkq - 0 5 | Ng4 | Does White have any isolated pawns? | No | structure |
5rk1/pBq2ppp/1b1p4/8/4Q3/1P4Pb/P4P1P/2R3K1 w - - 1 24 | d8c7 | What is the material balance in this position? | Black is up 3 pawns of material | material |
1r3r2/p2P1k1p/6p1/8/2P5/7P/PQ3P2/6K1 w - - 0 32 | Qd4 | What piece is on h8? | Empty | occupancy |
r3rqk1/1p1n1p2/p3bP1Q/7p/2p1P3/1P4PP/P5BK/R4R2 w - - 4 27 | Qxh5 | Identify any Black knight outposts on the board. | d3 | outposts |
b3r1rk/4bp1n/ppq2n2/4Q3/1PP1P3/PNB2B1P/6P1/2RR2K1 w - - 1 29 | Qf4 | What piece is on b4? | White Pawn | occupancy |
2b3k1/p4p1p/4p2p/2Pp4/5PP1/q3Q3/1bBK3P/7R b - - 1 24 | Qb4+ | Does White have any passed pawns? | Yes: c5 | structure |
r2q1r1k/ppp1n2p/3pP1p1/2P3B1/1PB1Nb2/6P1/P5KP/3Q4 w - - 0 26 | Bxf4 | Is the move from a2 to a3 legal? | Yes | legality |
r1bq1rk1/pp2ppbp/n2p1np1/2pP2B1/2P1P3/2N2N1P/PP3PP1/R2QKB1R b KQ - 0 8 | Nc7 | Are there any open files in this position? | No | files |
r1br2k1/p4pp1/p1PN2qp/2bQP3/8/2P2N2/PP3PPP/R4RK1 b - - 2 17 | d1d5 | What is the material balance in this position? | White is up 3 pawns of material | material |
8/p1p5/3p4/3Pk3/1K6/3N4/8/8 b - - 6 50 | f2d3 | Is the Black king in check? | Yes | check |
r2qr1k1/5ppp/p1p1pn2/1pbp4/1P3P2/P1NP3P/2PBQ1P1/R4R1K b - - 0 18 | b2b4 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r1bq1rk1/ppp1bppp/n3p3/1N1pN3/3PnB2/4PP2/PPP3PP/R2QKB1R b KQ - 0 8 | Nf6 | What is the material balance in this position? | Equal | material |
r2q3r/1p1k1pQ1/4b2n/7p/p2p4/P2B4/1P4PP/2R2R1K w - - 0 24 | Bb5+ | Identify any Black knight outposts on the board. | e3 | outposts |
2q1r1k1/1p1rpp2/2n3pb/pR5p/P1Pp4/3P2PP/2N1QPB1/1R4K1 w - - 8 27 | Na3 | What piece is on c8? | Black Queen | occupancy |
r1b3k1/pp4pp/2n1q3/3pP1B1/7K/3B1r1P/PP2N1P1/R2Q1R2 b - - 0 21 | Qxh3+ | Is the move from c8 to d7 legal? | Yes | legality |
r4r2/7p/p2N1n2/1p4k1/3n4/1BN2P2/PPP3PP/2K1R3 b - - 0 23 | b4 | Does Black have any isolated pawns? | Yes: h7 | structure |
Q2q2k1/5p2/4n2P/p3P3/1p6/4B1P1/6K1/8 w - - 5 47 | Qxd8+ | Identify any White knight outposts on the board. | d6, f4, f6, h4 | outposts |
3q2k1/p4pbp/1p4p1/2p1P3/1n3P2/1Q2B1N1/P5PP/6K1 w - - 3 9 | e6 | Is the c-file open, semi-open, or closed? | semi-open for White | files |
8/P2k4/3b4/8/3B2p1/2P2bn1/1P3K1r/R3R3 w - - 3 39 | h8h2 | Is the White king in check? | Yes | check |
r7/4b1p1/r3ppk1/4P3/P2R1P1P/2P2N2/2K5/R7 w - - 6 35 | Rd7 | What piece is on g7? | Black Pawn | occupancy |
5n2/2pp4/P5P1/5KPk/3b4/8/P7/8 w - - 1 4 | g7 | Are there any open files in this position? | Yes: b, e, f, h | files |
r1b1r1k1/2qn1ppp/ppnppb2/8/P3PP2/1NN1B3/1PP1BQPP/3R1R1K b - - 5 15 | Bb7 | Does Black have any isolated pawns? | No | structure |
5rk1/p2prp1p/1p2nRpQ/3RP2P/8/6P1/P4PK1/3Bq3 w - - 3 38 | Bb3 | What piece is on h4? | Empty | occupancy |
r2rk3/3nqp2/pp1npp1p/2p4N/2P2QPP/P1NPP3/1B6/5RK1 b - - 4 28 | Qf8 | Does Black have any isolated pawns? | Yes: h6 | structure |
r2qr1k1/pb3ppp/1p1p4/2n1p1B1/2P1P1n1/P4P2/1PBN1QPP/R3K2R w KQ - 2 16 | Bxd8 | Does White have any isolated pawns? | No | structure |
r1bqr1k1/pp1nbppp/2n1p3/2ppP1B1/3P1PQP/2N2N2/PPP3P1/R3KB1R w KQ - 2 10 | O-O-O | Is the a-file open, semi-open, or closed? | closed | files |
rr2qnk1/5pp1/4p2p/p1Rn4/Pp1PQ2P/1P3NP1/4NP2/2R3K1 w - - 1 26 | Ne5 | Is the move from f3 to h4 legal? | No | legality |
rn1qkbnr/p1p2ppp/1p2p3/7b/3PP3/1QN2P2/PP4PP/R1B1KBNR w KQkq - 0 8 | Qb5+ | Does White have any isolated pawns? | No | structure |
r1b1qrk1/pppn2bp/n2p4/3P1p2/2P1p2N/2N1B1PP/PPQ1BP2/R3K2R w KQ - 2 16 | Ng2 | Are there any open files in this position? | No | files |
rnbqkb1r/ppp1pppp/5n2/3p4/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq - 0 3 | exd5 | Is the a-file open, semi-open, or closed? | closed | files |
7k/5pR1/1p2pQ1P/1p2P1K1/1P4q1/8/8/8 w - - 2 63 | Kxg4 | Is the h-file open, semi-open, or closed? | semi-open for Black | files |
r1b1k1nr/pppp1ppp/2n2q2/b3p3/2BPP3/2P2N2/P4PPP/RNBQ1RK1 b kq - 0 7 | Nge7 | Are there any open files in this position? | No | files |
r1bqr1k1/1p1nbpp1/p6p/3p3n/3P1B2/1Q1BPN2/PP3PPP/2R2RK1 w - - 0 14 | Bc7 | Is the White king in check? | No | check |
r3rnk1/pp1bq3/2p2np1/2PpppN1/3P1P2/2NBP3/PPQ4P/2R2RK1 w - - 0 2 | Kh1 | Identify any Black knight outposts on the board. | h5 | outposts |
rnbqk2r/1p2bppp/p2p1n2/4p3/4P3/1NN5/PPP1BPPP/R1BQK2R w KQkq - 2 8 | O-O | Does White have any passed pawns? | No | structure |
3r1rk1/3n3p/pp1p2p1/3Ppp2/BPP5/R4P2/P5PP/2R3K1 b - - 1 24 | Nb8 | Are there any open files in this position? | No | files |
2R3k1/6p1/6pp/p7/1p6/r4P1P/6PK/8 b - - 1 35 | c5c8 | Is the White king in check? | No | check |
5r2/p3R1kp/1p4p1/6N1/6P1/2P3K1/PP5P/8 b - - 0 38 | e8e7 | Is the Black king in check? | Yes | check |
r2qk2r/bpp2pp1/p1npbn1p/4p3/PPB1P3/2PP1N1P/3N1PP1/R1BQK2R w KQkq - 1 10 | Bxe6 | Are there any open files in this position? | No | files |
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