fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
r3k2r/pp1n1pp1/4q2p/2p4P/8/4BNN1/P1Q2PP1/R3b1K1 w kq - 0 21 | Bxc5 | Is the move from f2 to b7 legal? | No | legality |
3R4/8/8/8/p2P1k2/P4p2/3NbK2/8 w - - 3 45 | d1e2 | What is the material balance in this position? | White is up 5 pawns of material | material |
8/5k2/3R2p1/pP4rp/P2R4/5P2/2r2KPP/8 w - - 5 43 | c4c2 | Is the White king in check? | Yes | check |
3rr1k1/1b1nnp1p/1qp1p1p1/Np6/1P1PP3/5NP1/1Q3PBP/2RR2K1 w - - 5 26 | Nd2 | Is the White king in check? | No | check |
rnb1k1nr/pp2ppbp/3p2p1/q1pP4/4P3/2N2N2/PPPB1PPP/R2QKB1R b KQkq - 1 6 | Qb4 | What is the material balance in this position? | Equal | material |
8/8/1p6/3K4/8/2k1b3/5p2/5B2 b - - 5 90 | c6d5 | What is the material balance in this position? | Black is up 2 pawns of material | material |
1k1r1b1r/pppq2pp/4bp2/4np2/2BP4/P3PQ2/1P1NNPPP/R3K2R w KQ - 1 12 | dxe5 | Are there any open files in this position? | No | files |
6k1/5bp1/5p1p/p2qn3/1p1B4/3P2P1/3KPQ1P/2R5 b - - 11 41 | Nc6 | What piece is on e5? | Black Knight | occupancy |
7k/1r4p1/7p/K7/5P2/2q5/7P/8 w - - 6 60 | c6c3 | Is the White king in check? | Yes | check |
r2qr1k1/ppp2pbp/3p2p1/3P4/2P3b1/4BN2/PP1Q1PPP/4RRK1 w - - 1 19 | Nd4 | Is the move from e1 to d1 legal? | Yes | legality |
r1bqr1k1/pppp1ppp/2n2n2/4p1B1/1P1bP3/P1NP1Q2/2P1NPPP/R3KB1R b KQ - 2 8 | Re6 | Is the move from d8 to e7 legal? | Yes | legality |
r6r/4nk2/2n1p2p/1bppPp1P/P4Pp1/2P5/2PB1KP1/R4B1R w - - 0 22 | Bxb5 | Is the move from f1 to g4 legal? | No | legality |
7r/pp1q1k1p/2ppbpr1/4nn2/3pN3/3B4/PPP1Q1PP/R1B2RK1 b - - 1 18 | Rhg8 | Identify any Black knight outposts on the board. | e3, e5 | outposts |
r7/1k6/1p2R2p/2p1P2R/2P5/B1P1KP2/P1b3P1/r7 w - - 3 38 | Re7+ | What piece is on g3? | Empty | occupancy |
r3k2r/p4ppp/5n2/1p6/b2NPq2/3P4/1K2BPPP/R7 w kq - 0 23 | b6b5 | What is the material balance in this position? | Black is up 14 pawns of material | material |
r1bqr1k1/2p2ppn/1bp4p/p3p3/2P1P3/1P3NNP/P2BQPP1/R3R1K1 b - - 2 18 | Nf8 | Identify any White knight outposts on the board. | a4, c4 | outposts |
8/5k2/2P2p2/R6P/8/4K3/p7/4r3 w - - 1 50 | a1e1 | Is the White king in check? | Yes | check |
r5k1/6qP/p6Q/3Ppr2/1p6/8/PPP5/2K4R b - - 0 29 | Kh8 | Does White have any isolated pawns? | Yes: h7 | structure |
r2qk2r/pp1nb1pp/2p1pB2/8/2p4Q/2N5/PPP2PPP/2KRR3 b kq - 0 13 | Bxf6 | What piece is on e4? | Empty | occupancy |
r3kb1r/1pp1npp1/p1p2q2/4p2p/4P1b1/3P1N1P/PPPN1PP1/R1BQ1RK1 w kq - 3 9 | Re1 | What piece is on c5? | Empty | occupancy |
rnb2r1k/ppp3pp/3b1q2/5p2/2B2P2/3N4/PPP1Q1PP/R1B1K2R w KQ - 6 15 | Bd2 | Is the move from b2 to b3 legal? | Yes | legality |
8/4R3/8/3b4/5P2/1P1pkP2/6rP/3BK3 b - - 2 50 | Kxf4 | What piece is on b2? | Empty | occupancy |
r1r3k1/p2qbppp/b3p3/n2p4/1p1P1B2/1P3NP1/P2QPPBP/R4RK1 b - - 0 18 | Qb5 | Is the c-file open, semi-open, or closed? | open | files |
3q1rk1/5p1p/6p1/2p5/1p2P3/1P1bQ2P/r2NN1P1/4KB1R b K - 1 24 | c4 | Is the White king in check? | No | check |
r1b1qrk1/pp1n1pbp/3p2p1/2pP4/2P1PQP1/2N2N1P/PP3P2/2R1KB1R b K - 0 14 | f5 | Are there any open files in this position? | No | files |
2b1r1n1/r3qp1k/2p4p/2p1bP1Q/2PpP2N/1P1P3P/2RB4/6RK w - - 9 37 | Rxg8 | Is the move from g1 to g6 legal? | Yes | legality |
1n1q1rk1/r4ppp/p2pp3/1p2b3/2P5/2N1QBP1/PP2PP1P/2RR2K1 b - - 1 16 | Rd7 | What piece is on h8? | Empty | occupancy |
r2qkbnr/p3pppp/2pp4/8/3pP1b1/2P2N2/PP3PPP/RNBQK2R w KQkq - 0 7 | c5d4 | What is the material balance in this position? | Black is up 1 pawn of material | material |
7k/5Qb1/p2p4/P2Pq3/1P6/3B4/K4R2/4r3 w - - 2 43 | Qc7 | Is the move from f7 to g7 legal? | Yes | legality |
5k2/7p/5p1K/8/1b6/6P1/8/2q5 w - - 0 45 | c2c1q | Is the White king in check? | Yes | check |
1r3k2/R4pp1/8/4R2p/8/4PP2/K4r1P/8 w - - 0 29 | f1f2 | Identify any White knight outposts on the board. | d4 | outposts |
5rk1/pp1q2bp/n2p1p2/3Pr2B/2Pp1p2/8/PP1B2P1/R2QR1K1 w - - 0 21 | Bxf4 | What is the material balance in this position? | Black is up 2 pawns of material | material |
K7/8/8/8/8/7p/6kN/8 w - - 17 9 | Ng4 | Is the move from a8 to e8 legal? | No | legality |
r1bqkbnr/pp1p1ppp/2n5/4p3/4P3/2N2N2/PP3PPP/R1BQKB1R w KQkq - 2 6 | Bc4 | Is the move from a1 to d7 legal? | No | legality |
r2qkb1r/1p2pppp/p2p1n2/2p3B1/3Pb3/2P2N2/PP3PPP/RN1QR1K1 b kq - 1 9 | d5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r3k2r/ppp2ppp/3b4/3R4/2P1Pp2/5n2/PPP2PKP/5R2 b kq - 5 18 | h1g2 | What is the material balance in this position? | Black is up 6 pawns of material | material |
6k1/p1R1p3/3p3p/1p4p1/3b3P/4rp2/P1P2N2/3K3R b - - 1 30 | Re5 | Is the move from d4 to g7 legal? | Yes | legality |
r1bqkb1r/5p1p/p1np4/1p1Npp2/4P3/N7/PPP2PPP/R2QKB1R w KQkq - 0 11 | Bxb5 | What piece is on h6? | Empty | occupancy |
3rr3/pR3k2/5n2/3p1q2/4pNp1/4Q1Pp/P1P2P1P/3R2K1 b - - 3 39 | b1b7 | Is the White king in check? | No | check |
2n5/1k1q4/pP1p4/2pP1pB1/2P2P2/2P5/Q5K1/8 b - - 0 38 | Nxb6 | What piece is on c8? | Black Knight | occupancy |
8/2k5/8/6pp/p2K4/P6P/1Nb5/8 w - - 4 62 | Kd5 | Identify any Black knight outposts on the board. | f4, h4 | outposts |
r1bq1rk1/pp1n1pp1/2n1p2p/2ppP3/5B2/2P1PN1P/PPB2PP1/R2QK2R b KQ - 1 12 | Re8 | Does Black have any isolated pawns? | No | structure |
3r3k/1p3pp1/p1p4p/3b4/2r5/4BN1P/PP3PP1/3R2K1 w - - 0 27 | Ne5 | Is the Black king in check? | No | check |
r5k1/pp1b2pp/1qn1p3/3p1nP1/1b1P2R1/1PN2B2/PB3P1P/R2Q1K2 b - - 4 17 | Rf8 | What piece is on a8? | Black Rook | occupancy |
5bk1/1p6/4P3/3P3p/p7/2P3NK/8/8 w - - 1 50 | Nf5 | Is the move from d5 to g2 legal? | No | legality |
r2q1rk1/1n3ppp/3p4/3Np1b1/1pN1P3/2PB4/5PPP/3QK2R w K - 0 22 | cxb4 | Does White have any passed pawns? | No | structure |
r3r1k1/2pq1pb1/p6p/1p2p3/2n1Q1N1/P1P4P/BP3PP1/R4NK1 w - - 2 22 | Nfe3 | What is the material balance in this position? | Black is up 2 pawns of material | material |
r3k2r/pp1b1pn1/2np4/2p2p1p/2P1P1q1/2P2R2/P3B1N1/R1BQ2K1 w kq - 0 19 | Re3 | Is the e-file open, semi-open, or closed? | semi-open for Black | files |
1r4k1/pr3p1p/1pqb1P2/2p5/P1Pp1B2/3Q2P1/4P2P/RR4K1 w - - 1 28 | Rf1 | Is the move from b1 to d1 legal? | Yes | legality |
4n3/p5k1/1p2B2p/4K1pP/1P4P1/8/P7/8 w - - 1 43 | b5 | Is the move from e6 to d5 legal? | Yes | legality |
5Nk1/3b2p1/5p1p/4b3/8/1P5P/5BP1/6K1 w - - 8 47 | Nxd7 | Is the a-file open, semi-open, or closed? | open | files |
8/1R3p2/3kb3/3pR2p/P2P3K/2P2r2/8/8 b - - 0 63 | Rxc3 | Does Black have any passed pawns? | Yes: f7, h5 | structure |
4R3/5pk1/1b3p2/7p/5P2/1q2P1P1/4NK2/R7 b - - 8 64 | f5 | Is the move from b3 to a4 legal? | Yes | legality |
r3r1k1/1pp2ppp/2n2n2/p2qp3/5P2/PPQPP3/1B3P1P/R3KBR1 b Q - 0 14 | Nd4 | What piece is on g5? | Empty | occupancy |
r1bqk2r/pp2bppp/2n5/6B1/2Pp4/6P1/PP3PBP/RN1QR1K1 b kq - 3 13 | f6 | What piece is on d6? | Empty | occupancy |
r1bqkbnr/pp1p1ppp/2n5/2p1p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq - 0 4 | Bc4 | Is the Black king in check? | No | check |
4r1k1/1p3p2/p1p4p/P2rP3/1PQPp3/4Pq2/7P/1RR3K1 b - - 8 42 | Re6 | Is the f-file open, semi-open, or closed? | semi-open for White | files |
3r1rk1/pb4p1/2p2p2/5N1p/Np2P1n1/4B3/PP4Pq/R2RKQ2 b - - 1 23 | Nxe3 | What is the material balance in this position? | White is up 1 pawn of material | material |
1k1q4/8/1p6/4P1p1/P2Q2P1/8/7r/1KR3R1 b - - 0 42 | Qxd4 | What is the material balance in this position? | White is up 6 pawns of material | material |
4r1k1/p4p2/1p1pnPpQ/5q1p/3p3P/P2P4/1P3PP1/4R1K1 w - - 0 2 | Rxe6 | What piece is on f2? | White Pawn | occupancy |
2bk3r/2r2pq1/4pN2/3pn2p/2n3p1/P7/1P3PPP/RBBQR2K w - - 0 31 | Ne4 | Is the d-file open, semi-open, or closed? | semi-open for White | files |
7r/4k3/2p1pR2/p1r4b/4P1pp/PP6/1KB3PP/5R2 w - - 0 34 | Bd3 | Is the Black king in check? | No | check |
2b3k1/1p4bp/P1nB3r/2P1p1p1/Pq2Pp2/5P2/4B1PP/3Q1RK1 w - - 1 26 | Qd3 | Does Black have any passed pawns? | No | structure |
rn1qkbn1/ppp1p1r1/3p1pBp/8/2PP4/2N1PNB1/PPQ2PPP/R3K2R b KQq - 2 12 | f5g6 | Is the Black king in check? | Yes | check |
r5r1/ppp1q1kp/2b2pp1/4p3/8/1Q3N2/PPP2PPP/2KRR3 w - - 4 22 | Nd4 | Is the e-file open, semi-open, or closed? | semi-open for White | files |
r1b2rk1/p3nppp/1qp5/3p4/8/1N2PN2/PPPQ2PP/R4RK1 w - - 3 14 | Qc3 | Are there any open files in this position? | No | files |
r4bk1/3q1pp1/1pbp4/8/1NP1Pp1P/rPN2P2/3R1Q1P/3R2K1 w - - 2 33 | Rb1 | What piece is on h4? | White Pawn | occupancy |
r4r1k/1p5p/2p1b1p1/p2pP1P1/6pq/3BP1NP/PPQ3K1/4RR2 w - - 0 26 | Nh1 | Identify any White knight outposts on the board. | None | outposts |
8/1bBn4/1p3k1p/8/2P1pK2/P3P3/4B3/8 w - - 4 50 | Bg4 | Identify any Black knight outposts on the board. | a5, c5, g5 | outposts |
r2qkb1r/pp3ppp/2ppbn2/5P2/4P3/2N5/PPPBQ2P/R3KBR1 b Qkq - 0 12 | Bc8 | Is the d-file open, semi-open, or closed? | semi-open for White | files |
3r1rk1/pb1n1ppp/1p2pn2/8/2PP1q2/P2B4/1B2QPPP/R3RNK1 b - - 9 17 | Nb8 | Does White have any isolated pawns? | Yes: a3 | structure |
rnbqkbnr/1p1ppppp/p7/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq - 0 3 | d4 | Identify any White knight outposts on the board. | None | outposts |
8/5p2/2B1p3/3R1p2/r2P4/3K1k2/5P2/4b3 b - - 0 56 | Ra3+ | Is the Black king in check? | No | check |
r2qr1k1/pbpn1pbp/1p1p1np1/4p3/2PP4/2N1P2P/PP1NBPPB/R2Q1RK1 b - - 2 11 | exd4 | What piece is on b6? | Black Pawn | occupancy |
8/Q4pk1/6p1/5qP1/P4P2/4K3/8/8 b - - 12 58 | e4e3 | What is the material balance in this position? | White is up 1 pawn of material | material |
r1bqk1nr/ppp4p/1b3p2/3Pp1pQ/2B1P3/2N5/PP3PPP/R1B2RK1 b kq - 1 11 | d1h5 | Is the Black king in check? | Yes | check |
8/1Q2R3/8/2k5/7p/8/5PKP/3R4 w - - 4 53 | b4c5 | What is the material balance in this position? | White is up 20 pawns of material | material |
2B5/6p1/p3N3/5p2/4pk2/8/PPP2r2/2KR4 b - - 1 36 | c5e6 | Is the White king in check? | No | check |
5rk1/pb3N2/1p2Pp2/3p3P/n1r5/8/P2R1PP1/4R1K1 w - - 2 28 | Nd6 | Does White have any isolated pawns? | Yes: a2 | structure |
5K2/8/3p4/3k4/3r4/8/2Q5/8 w - - 34 18 | Ke7 | Does White have any passed pawns? | No | structure |
7k/pp2r2p/4p3/4P1PR/8/2r5/P1P5/2KR4 w - - 0 27 | g6 | Does White have any isolated pawns? | Yes: a2, c2, e5, g5 | structure |
r2q1bk1/pbp2ppp/1pn3r1/1N1p4/PP1Pn3/BQ2PN2/4BPPP/R3R1K1 w - - 5 16 | Nc3 | Is the move from b4 to h6 legal? | No | legality |
r1b2rk1/pp1nqpb1/2p1p1pp/8/3PN2P/4PN2/PPQ2PP1/2KR1B1R b - - 4 13 | Rd8 | Is the move from g8 to c8 legal? | No | legality |
rn1qkb1r/pp2pp1p/5p2/2pP4/2p5/8/PP3PPP/R1BQKBNR w KQkq - 0 8 | g7f6 | Identify any Black knight outposts on the board. | d3, d4 | outposts |
r1b1k2r/pp1n2pp/2nbpq2/2pp4/3P4/2PB1N2/PP1N1PPP/R1BQ1RK1 w kq - 2 10 | c4 | Does White have any isolated pawns? | No | structure |
1r4k1/4Rp2/3p2pQ/2p2b1p/2Pb4/6q1/1P3NB1/3R1K2 w - - 10 42 | Qd2 | Does Black have any passed pawns? | Yes: f7, g6, h5 | structure |
r1bq1rk1/1pp1ppbp/1nnp2p1/p3P3/3P4/1B3N1P/PPP1QPP1/RNB2RK1 w - - 0 10 | a4 | Identify any White knight outposts on the board. | None | outposts |
3q2k1/Q3p2p/6p1/2N2r2/3b4/7P/P1r2PP1/R4RK1 w - - 1 20 | e5d4 | What is the material balance in this position? | White is up 1 pawn of material | material |
rnbq1rk1/pp2ppb1/5np1/6N1/4pP1Q/2N5/PPP3P1/R1B1KB1R b KQ - 1 13 | Bf5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
rq3rk1/pb1n1p1p/3b2p1/2p5/Np2n3/1N2B1P1/PPQ1BP1P/R2R2K1 w - - 0 19 | Na5 | Does White have any isolated pawns? | No | structure |
r1b1kb1r/pp1n1ppp/4pq2/1B2N3/3p4/2P2Q2/PP3PPP/R1B1K2R w KQkq - 2 11 | Bf4 | Is the move from b5 to f1 legal? | Yes | legality |
3rrbk1/2q3p1/p5Pp/1p1bPB1R/3Np3/2PnB3/PPQ5/1K4R1 w - - 3 26 | Qh2 | Does White have any passed pawns? | Yes: e5 | structure |
4k2r/1b1n1ppp/pp2pn2/4N3/1P1P4/4P3/P2Q1PPP/q3K2R w Kk - 0 17 | c3a1 | Is the White king in check? | Yes | check |
8/Bk4pp/5p2/p2p4/2b5/5P2/3K2PP/8 w - - 0 42 | Bc5 | Identify any Black knight outposts on the board. | b4, c4 | outposts |
r4rk1/1bp3b1/p7/1p3pp1/6P1/P1NQ4/1P3P2/2KR3R b - - 0 22 | g2g4 | What is the material balance in this position? | White is up 5 pawns of material | material |
r7/6pk/p6p/R4p1P/2bPQ3/2P5/1q3PP1/6K1 w - - 0 35 | Rxf5 | Is the move from e4 to b1 legal? | Yes | legality |
rn2k1nr/p3qBpp/2p5/1p6/1P2bB2/5N2/P3QPPP/R3K2R b KQkq - 0 14 | Kf8 | What piece is on h5? | Empty | occupancy |
2rn1k1r/pp3p1p/4b3/q1bN2Np/5QP1/6PB/P3PP2/3R1K2 w - - 2 21 | Qe5 | What piece is on g6? | Empty | occupancy |
8/5p1p/4pp2/pN6/Pk2P3/8/1b1K1PPP/8 w - - 0 28 | Nd6 | What is the material balance in this position? | Equal | material |
5rk1/4ppb1/b2p2pp/N2P4/1pP5/3B2P1/4PP1P/1n3RK1 w - - 0 27 | Rxb1 | What is the material balance in this position? | Black is up 3 pawns of material | material |
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