fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
r1b1r1k1/p2p1pbp/nppBq1p1/2P4n/Q2P4/5N2/PP2PNP1/R3KB1R w KQ - 0 16 | e4 | Is the move from b2 to a2 legal? | No | legality |
8/4k1p1/2b2p2/p1r1p3/4P1rp/PPN1R3/1K1R2PP/8 b - - 1 37 | Ke6 | Is the move from g7 to e4 legal? | No | legality |
rn2k2r/pp2qppp/3p1n2/2pP4/2P2P2/2Nb4/PP3KPP/R1BQ3R w kq - 0 12 | Qxd3 | Is the move from g2 to b3 legal? | No | legality |
5N2/1p6/3P4/2p3k1/p1P5/P1KPp2r/1P6/8 b - - 0 42 | Rh8 | Identify any Black knight outposts on the board. | None | outposts |
3q1rk1/3b1ppp/r2b1n2/p2p4/8/P1N1P2P/1BQ1NPP1/R3K2R w KQ - 0 17 | Rd1 | What piece is on f5? | Empty | occupancy |
4qrk1/2rn4/ppbR1p1Q/2p1pp1p/P3P3/2P3P1/1PB2P1P/3R2K1 w - - 0 33 | Bb3+ | Is the g-file open, semi-open, or closed? | semi-open for Black | files |
7k/2p3b1/1p1P4/1P6/2P1K3/3P4/rB3N2/8 b - - 0 37 | cxd6 | Are there any open files in this position? | Yes: a, e, f, g, h | files |
r2b2k1/1q1n1pp1/1pp1pn1p/2Pp4/1P1P1B2/r1NNP2P/2Q2PP1/1RR3K1 b - - 3 19 | b5 | Identify any White knight outposts on the board. | None | outposts |
r2qkb1r/3b1p1p/p1nppp2/1p6/3NPP2/2N5/PPPQ2PP/1K1R1B1R b kq - 1 11 | b4 | Does Black have any passed pawns? | No | structure |
r1bqkbnr/1pp2pp1/2np3p/p2N4/3NP3/8/PPP2PPP/R1BQKB1R w KQkq - 0 1 | Nb5 | Does Black have any passed pawns? | No | structure |
r4rk1/5pb1/2NQ1np1/1B1Pp2p/8/5P2/PP4qP/1K1R3R b - - 0 21 | Qxf3 | What piece is on a2? | White Pawn | occupancy |
6r1/p7/1p1B1Rb1/2p5/k1Pp2P1/P2P1PK1/1P1R4/1r6 b - - 8 43 | Kb3 | What is the material balance in this position? | White is up 2 pawns of material | material |
2r3k1/8/3Qp1p1/7p/1pq4P/6P1/5P2/5RK1 w - - 0 39 | Re1 | What is the material balance in this position? | Black is up 1 pawn of material | material |
8/kbr5/p3K3/4P3/1n5p/8/8/q7 w - - 0 52 | a2a1q | What is the material balance in this position? | Black is up 21 pawns of material | material |
6k1/1q3pp1/2nQ4/5P2/ppP1p1P1/4P3/1P2BK2/8 w - - 3 37 | g5 | Are there any open files in this position? | Yes: d, h | files |
5rk1/5pq1/4p2p/pr6/4BQ2/1Pb5/6PP/3R1R1K w - - 2 28 | Bc2 | Identify any White knight outposts on the board. | a4, c4 | outposts |
6k1/8/3p2pP/p2Pnp2/1p5P/1P2K2R/3RBQ2/2q5 b - - 7 47 | Qc5+ | Is the f-file open, semi-open, or closed? | semi-open for White | files |
r4r1k/pp3p1p/1n1P1Np1/1qn1P1B1/7Q/1B3P2/PP2K2P/8 w - - 4 25 | Ke3 | Identify any White knight outposts on the board. | d6 | outposts |
r1b4k/pp2R1p1/2pp1rqp/8/2PQ4/5B2/PP3PPP/4R2K b - - 3 25 | Kh7 | Identify any White knight outposts on the board. | None | outposts |
8/8/3k4/3r2K1/4R3/5PP1/4p2P/8 w - - 1 40 | d2d5 | Is the White king in check? | Yes | check |
2bq1r2/1pp3k1/3p1bp1/3Pp1n1/1PP1PpP1/1NN5/4B1KR/2Q1B3 b - - 0 30 | Rh8 | What is the material balance in this position? | White is up 2 pawns of material | material |
4b3/2K1k3/2N1p1p1/3pP2p/2pP1P1P/2P5/8/8 b - - 36 74 | Kf7 | Are there any open files in this position? | Yes: a, b | files |
3rr3/pnp5/1p3kpp/5p2/1PP2P1P/P5P1/2B1K3/3R1R2 w - - 1 35 | f8e8 | Is the Black king in check? | No | check |
7r/8/p2k2Rp/1p1P4/4P3/P1N5/1PPKN3/8 b - - 2 37 | g2g6 | What is the material balance in this position? | White is up 8 pawns of material | material |
2r3r1/1p2p2k/5pbb/pP1Pq1p1/P1pNP3/2N2P1P/2Q3K1/3R1R2 w - - 1 32 | Nce2 | Is the move from f1 to h3 legal? | No | legality |
rnbq1rk1/p2n1p1p/1ppbp1p1/6P1/1P5P/3BPN2/PBQP1P2/RN2K2R w KQ - 0 13 | h5 | Identify any White knight outposts on the board. | None | outposts |
r3k2r/2q1npp1/np2p2p/3pP2P/3P4/5N2/2P2PP1/R1BQK2R b KQkq - 0 14 | Qc4 | Is the move from c7 to c2 legal? | Yes | legality |
r1bqrbk1/3n1ppp/p2pp3/1p4P1/3QP2P/1PN5/PBP2PB1/2KR3R b - - 1 15 | Bb7 | Is the move from b5 to b4 legal? | Yes | legality |
2kr4/1p2N3/2p1p3/p3P2p/2b5/6PP/6P1/3R1RK1 b - - 2 25 | g6e7 | Is the White king in check? | No | check |
8/5ppk/7p/P1R5/3p4/r5PP/4PPK1/8 w - - 0 33 | Rd5 | What is the material balance in this position? | White is up 1 pawn of material | material |
r2q2r1/pb2n1bQ/4pk1B/1p5B/2pP4/2P5/PP3PPP/R4RK1 w - - 1 21 | h4 | Does Black have any isolated pawns? | Yes: e6 | structure |
5rk1/1bqnbppp/pn1pp3/1p4P1/4P3/2PBBP2/P1P1NQ1P/1K1R3R w - - 1 17 | h4 | Is the move from a2 to a4 legal? | Yes | legality |
2rk4/3n2p1/1Q5p/8/5P2/P4R1P/2r5/4R2K b - - 0 32 | Nxb6 | Does Black have any passed pawns? | No | structure |
1r4k1/2p1q1p1/r1n1p2p/p1Qp1p2/P2P1P2/2P3P1/4P1BP/RR4K1 b - - 3 23 | Qxc5 | Does White have any isolated pawns? | Yes: a4 | structure |
r3q1k1/pbp3p1/1p2pbN1/3n3Q/3P4/4B3/PPP3PP/5RK1 w - - 7 21 | Rxf6 | Is the move from h5 to h8 legal? | Yes | legality |
2r2bk1/1b3p1p/pn1r2p1/1ppPp3/4P3/1PN1BP2/PK2B1PP/3R3R b - - 6 20 | c4 | Is the c-file open, semi-open, or closed? | semi-open for White | files |
rn2n1k1/pppq3p/4p1p1/8/2PpQ3/8/PP3bPP/4R1K1 w - - 0 21 | h4f2 | Is the White king in check? | Yes | check |
2rrb3/pp2qpk1/2p1p2p/3nN3/3P1P1p/3BP3/PP4P1/1KQR3R w - - 0 23 | Qd2 | Does White have any isolated pawns? | No | structure |
2rr2k1/p3q2p/bppbp3/2Pp1p2/3Pn1p1/1P1NP1P1/PBR2PBP/2QR2K1 b - - 0 23 | bxc5 | Is the move from d6 to c7 legal? | Yes | legality |
5r1k/2R5/1p1p3b/1P2p3/2P1N1p1/3P2n1/1B4K1/8 b - - 0 32 | Nf5 | Is the c-file open, semi-open, or closed? | semi-open for Black | files |
5k2/4p1b1/B7/7n/1P1P1r2/2B4P/P4P1P/5K2 b - - 0 41 | Bxd4 | What piece is on b4? | White Pawn | occupancy |
rq3rk1/1b2b1B1/pp2pp2/2pp3Q/5P2/1P2PR2/P1PP2PP/R5K1 w - - 8 22 | Rg3 | Are there any open files in this position? | No | files |
4r3/1p5p/pk6/2P2n1P/8/2BP4/2P5/1K4R1 b - - 0 39 | Kxc5 | What piece is on f1? | Empty | occupancy |
r6r/4nk2/bpn1p2p/q2pPp1P/P4Pp1/2P1Q3/2P1NKP1/R1B2B1R w - - 4 18 | Bd2 | Does Black have any isolated pawns? | Yes: b6 | structure |
8/8/5k2/p1K2p1b/5P1P/1B4P1/8/8 w - - 19 16 | Kb6 | Does Black have any passed pawns? | Yes: a5 | structure |
2rqr1k1/pb3pPp/6p1/2np4/3Q4/P4PN1/4B1PP/1R3RK1 b - - 2 24 | Qe7 | Is the Black king in check? | No | check |
r1b1k2r/pppp1pp1/5qnp/8/2PN1P2/2P3P1/P3P2P/R2QKB1R b KQkq - 0 11 | O-O | Is the b-file open, semi-open, or closed? | semi-open for White | files |
5k2/1r3p2/4p3/P2p2Qp/3P4/4nP1P/1r4PK/8 w - - 0 37 | Qxe3 | Is the move from f3 to f4 legal? | Yes | legality |
rnb1k3/p2n3p/1p2Q1p1/3pP3/2pP1P2/6N1/q1P2KPP/7R b - - 4 22 | d6e6 | What is the material balance in this position? | Black is up 6 pawns of material | material |
1r4qr/1k2n1p1/1n2p2p/pp1pPp1P/b1pP1P2/P1P1N1BB/R1P3P1/3QR1K1 w - - 2 29 | Rf1 | What piece is on g7? | Black Pawn | occupancy |
2r2rk1/1pqnbppp/p1p1p1bn/4P3/2NP2P1/5N1P/PP1BBP2/2RQ1RK1 w - - 1 16 | Bf4 | What is the material balance in this position? | Equal | material |
2R5/8/8/2K5/4b3/4k3/8/3r4 w - - 20 67 | Rc7 | Identify any White knight outposts on the board. | None | outposts |
r3k2r/pp1qppbp/2np1np1/8/2PNP3/2N5/PP3PPP/R1BQ1RK1 w kq - 1 10 | Nde2 | Is the White king in check? | No | check |
r1b1k2r/pp2bpp1/1qn1p3/3pPn1p/1P1P3P/P4N2/1B3PP1/RN1QKB1R w KQkq - 0 11 | Bd3 | What piece is on h4? | White Pawn | occupancy |
r2n2k1/3r1qp1/1R3pQp/2p1p2P/P7/4B1P1/4PP2/1R4K1 w - - 2 30 | Rb8 | Are there any open files in this position? | Yes: b, d | files |
rnbqkb1r/p4p2/2p1pn1p/1p2N3/2pPP1pP/2N3B1/PP3PP1/R2QKB1R b KQkq - 1 10 | Bb7 | What piece is on b5? | Black Pawn | occupancy |
2r3k1/2Pr2p1/1pR4p/p2qp3/3p4/4P3/P1Q2PPP/2R3K1 w - - 2 27 | Qb1 | Are there any open files in this position? | No | files |
8/8/6r1/8/4k1p1/6P1/4B3/6K1 w - - 26 16 | Kg2 | Is the move from g1 to f1 legal? | Yes | legality |
r1bk3r/ppppB2p/2n1p3/4p2B/3b2Q1/8/P1P2PPP/5K1R b - - 0 17 | g5e7 | Is the Black king in check? | Yes | check |
4k3/1q3p2/6p1/1K3b1p/p4P1P/8/8/2r5 w - - 10 54 | e4b7 | Is the White king in check? | Yes | check |
5bQ1/p3k3/1p3p2/n4q2/8/P7/5PPP/5RK1 w - - 0 34 | Re1+ | Is the move from g8 to f2 legal? | No | legality |
8/5pk1/8/3Qp3/1p3q2/8/2KN3p/8 b - - 1 55 | e4 | Identify any White knight outposts on the board. | None | outposts |
r3k2r/pp2npR1/2bQ4/2p2q1p/2P5/2P5/P3B1N1/R1B3K1 b kq - 0 23 | Rd8 | What is the material balance in this position? | White is up 1 pawn of material | material |
r2q2k1/5r1p/p2pB3/nppP4/2P5/1P2N3/PQ1N3P/6K1 w - - 2 26 | Ne4 | What piece is on e4? | Empty | occupancy |
r1bq1rk1/2pnppbp/p2p1np1/1p6/2PPP2P/2N1BP2/PP1QN1P1/R3KB1R b KQ - 0 9 | h5 | Is the move from h7 to h6 legal? | Yes | legality |
r1b1qrk1/1pp2pb1/3p1np1/p1nPp1Bp/2P1P2P/2N3N1/PP1QBPP1/2KR3R b - - 5 12 | Ng4 | Is the move from e8 to c6 legal? | Yes | legality |
3r2k1/p1r2ppp/1pbb4/3p4/2pPq3/1P2P3/PBR1QPPP/3R1NK1 w - - 0 19 | f3 | Is the move from g2 to g3 legal? | Yes | legality |
r1bqkbnr/ppp1pppp/2n5/3p4/3P4/5NP1/PPP1PP1P/RNBQKB1R b KQkq - 0 3 | Bg4 | Identify any Black knight outposts on the board. | None | outposts |
8/p5pk/4p1q1/8/5Q2/5Pp1/P2r3P/1R2R2K b - - 1 5 | Rxh2+ | Identify any White knight outposts on the board. | e4, g4 | outposts |
2r1kb1r/pq3ppp/1pn1p3/1N6/Q4B2/8/PP3PPP/R4RK1 w k - 6 19 | Rac1 | What is the material balance in this position? | Black is up 1 pawn of material | material |
1R6/p2r1kpp/2r1np2/4p3/1Rn5/2P1B1P1/P3NPKP/8 w - - 16 31 | R8b7 | Identify any White knight outposts on the board. | None | outposts |
r1b2rk1/1pqp3p/p3pp2/2P2p2/N3n3/5BP1/PP3P1P/2RQ1RK1 b - - 1 16 | d5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r4k1r/1b1n1p2/p1qNp3/1p2P1B1/6Qp/1P6/1PP3PP/2K4R w - - 1 22 | Rf1 | Identify any White knight outposts on the board. | None | outposts |
3r2k1/3rbb2/1pq2p1p/p2p1Pp1/6P1/P1BRP2P/1P1R2B1/3Q3K w - - 1 36 | e4 | Identify any White knight outposts on the board. | d4 | outposts |
5k2/8/5P2/KB6/8/P7/2b5/8 b - - 0 6 | Kf7 | Is the b-file open, semi-open, or closed? | open | files |
r1b2rk1/p1p3pp/2p5/2p1p3/2P3q1/PP1P4/1B2P1K1/R1Q2R2 w - - 0 20 | h4g4 | Is the White king in check? | Yes | check |
1B5b/1pp1pK2/8/1PP5/3k1P2/N4B2/r6P/8 w - - 0 1 | Ba7 | Is the d-file open, semi-open, or closed? | open | files |
kr6/p2RbPpp/B7/6q1/8/2p3B1/P4P2/3R2K1 w - - 0 28 | f8=Q | What is the material balance in this position? | Black is up 2 pawns of material | material |
1rb2rk1/1p1p3p/pN2pp2/2P1q3/4p3/6P1/PP3P1P/2RQ1RK1 w - - 2 19 | Qd6 | Does White have any isolated pawns? | No | structure |
5r1k/p1q4p/5rpb/3Rp3/2PpP3/1N1P1P2/6PP/3Q1RK1 b - - 0 34 | Rd8 | Does White have any passed pawns? | Yes: c4 | structure |
r2qk2r/ppp3pp/2B5/8/1b1P1p2/1Q2P3/PP2KPPP/R5NR b kq - 0 13 | d5c6 | Is the Black king in check? | Yes | check |
r4rk1/1pp3p1/3pp2p/p3p3/3nP1P1/3P3P/PPPR1P2/2KN3R b - - 2 16 | b5 | Identify any Black knight outposts on the board. | None | outposts |
8/7k/5R1P/8/5p2/7K/2r3P1/8 b - - 4 52 | Rc3+ | Are there any open files in this position? | Yes: a, b, c, d, e | files |
r2qnrk1/3nbppp/8/3PpPP1/ppb5/4B3/PPPQN2P/1KNR1B1R b - - 0 18 | Nd6 | Is the move from a4 to f8 legal? | No | legality |
4r1k1/pp2qb1p/2p2r2/4np2/2P2N2/1P4PP/P3Q1B1/3R1RK1 b - - 0 22 | a5 | What piece is on g4? | Empty | occupancy |
rnbq1rk1/p3bppp/2p1pn2/1p6/2QP4/5NP1/PP2PPBP/RNB2RK1 w - - 0 9 | Qb3 | What piece is on e6? | Black Pawn | occupancy |
r1bq1b1r/ppp1p1pp/2k5/8/8/4B3/PP3PPP/2KR1B1R w - - 2 17 | Rxd8 | Is the e-file open, semi-open, or closed? | semi-open for White | files |
r1bq1rk1/pp2bppp/2np1n2/2p3N1/2B1PB2/2NP4/PPP3PP/R2Q1RK1 b - - 0 9 | h6 | Is the move from e7 to e3 legal? | No | legality |
2b5/8/p2p2k1/P6p/5K1P/8/4B3/8 w - - 6 103 | Bf3 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r4k2/1p2b2r/1q1NQ2p/p1p3p1/4P3/1P6/P1P2PPP/R2R2K1 w - - 1 23 | Rd5 | Identify any White knight outposts on the board. | None | outposts |
r1bqkb1r/3n1ppp/p1n1p3/1pppP3/3P1P2/P1P2N2/1P2N1PP/R1BQKB1R b KQkq - 0 9 | Be7 | What is the material balance in this position? | Equal | material |
3r1rk1/1bq3pp/p1p1P3/1p1PPp2/P6Q/2p3P1/6BP/3R1R1K b - - 1 24 | Rxd5 | Identify any Black knight outposts on the board. | a4, c4, e4 | outposts |
r3rqk1/1ppn1p1p/3p1bp1/pPnP4/8/2N2P2/PP1QBBPP/1R3RK1 b - - 8 21 | Qg7 | Identify any White knight outposts on the board. | None | outposts |
r1b2r2/pp1n1pkp/6p1/q1p1p3/2Pn4/2N2NP1/PP2PPBP/R1QR3K b - - 1 14 | Nxf3 | What piece is on a7? | Black Pawn | occupancy |
r2q1rk1/1b2bppp/ppn1pn2/3p4/1P1P4/P1NBPN2/5PPP/R1BQ1RK1 w - - 1 12 | Bb2 | Is the Black king in check? | No | check |
r1bqk1nr/pp1p1ppp/2p5/8/2BPP3/2P5/P4PPP/R1BQ1RK1 b kq - 0 10 | d5 | Is the move from h7 to f3 legal? | No | legality |
r3k2r/pb1B1pp1/1pn2q2/2p5/2P1Pp1p/P1PP3Q/5PPP/R1B2RK1 b kq - 0 15 | Kf8 | Is the move from e8 to d8 legal? | Yes | legality |
rnbq1rk1/ppp1bppp/4pn2/3p2B1/2PP4/2N2N2/PP2PPPP/R2QKB1R w KQ - 4 6 | Qc2 | Is the a-file open, semi-open, or closed? | closed | files |
rnq2rk1/pb1pbpp1/1p2p2p/1N6/Q1P5/5NP1/PP2PPBP/R2R2K1 w - - 4 14 | Nd6 | What is the material balance in this position? | Equal | material |
1R4k1/4p2p/4p1p1/p2q1r2/3n1B1P/6P1/5P2/2Q3K1 b - - 4 30 | Rf8 | Is the b-file open, semi-open, or closed? | open | files |
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