fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
8/p3k1pp/8/5R2/8/4P3/PP4PP/3r2K1 w - - 1 25 | Kf2 | Is the move from f5 to f1 legal? | Yes | legality |
2r1r1k1/1b1n1p1p/pp1q1np1/1BPp4/8/1P2PNN1/PQ3PPP/2RR2K1 b - - 0 21 | bxc5 | Identify any White knight outposts on the board. | d4, d6 | outposts |
r3k2r/1pq2p2/p1nb1pp1/3Pp3/B1Q5/2P5/PP3PPP/R1B1K2R w KQkq - 0 18 | a7a6 | What is the material balance in this position? | White is up 1 pawn of material | material |
3r3r/5R1p/1kp2Qp1/2q1p2P/p1PpP3/2nP2P1/6B1/5RK1 w - - 2 30 | Rxh7 | Identify any Black knight outposts on the board. | b3 | outposts |
4r1k1/2p3pp/p3b3/1p1p4/8/2P1Br2/PP5P/R2B1NK1 b - - 1 20 | Rf7 | Identify any White knight outposts on the board. | None | outposts |
5rk1/1q1brpnp/p1n2Qp1/1pB1p3/2p1P3/2P2N1P/PPB2PP1/2R1R1K1 b - - 9 26 | Re6 | Does Black have any passed pawns? | No | structure |
2r2nk1/p5bp/1p1Rp3/1P2n1p1/N3B3/1P3PB1/P3K2P/8 w - - 0 27 | Nxb6 | Is the c-file open, semi-open, or closed? | open | files |
r1b1k2r/5pp1/p2p3p/qppPp1b1/P3n3/1P3NQ1/2PNBPPP/3RK2R b Kkq - 1 17 | a1d1 | What is the material balance in this position? | Black is up 1 pawn of material | material |
rnb1kb1r/p3pppp/3p1n2/qp1P4/P1p1P3/2N5/1PPN1PPP/R1BQKB1R b KQkq - 0 7 | Ba6 | Is the move from b5 to c7 legal? | No | legality |
5r2/4Npk1/p2p1qp1/7N/1p2P2Q/8/P4PP1/6K1 b - - 7 32 | g3h5 | Is the Black king in check? | Yes | check |
2k2r2/1ppqr3/p1npb3/5ppP/2PB4/1P6/PKPQB1P1/4R2R w - - 0 24 | Bc3 | Does White have any passed pawns? | Yes: h5 | structure |
rn3r2/4Q2k/2p3pp/1p6/1p6/1B5P/Pq3PP1/R4RK1 b - - 1 24 | e4e7 | Is the White king in check? | No | check |
rnbqk1nr/p1p2ppp/1p2p3/3pP3/1b1P4/P1N5/1PP2PPP/R1BQKBNR b KQkq - 0 5 | Bf8 | Does Black have any isolated pawns? | No | structure |
r3rk2/1p2pp2/3p1qp1/p2P3p/P1P1RPP1/1Pb4P/4RBK1/1Q6 w - - 5 49 | Qc1 | What piece is on f7? | Black Pawn | occupancy |
r1bq1rk1/1p1n2b1/p2P2np/P1pP1pp1/8/2NB1N1P/1P3PPB/R2QR1K1 b - - 2 17 | Nf6 | Is the move from d7 to b6 legal? | Yes | legality |
2k4r/1pp5/p1p5/2b1pq2/5p1p/3P2rP/PPPN1P1K/R2Q2RN w - - 2 22 | Qf1 | Does Black have any isolated pawns? | Yes: h4 | structure |
r2q1rk1/2p3pp/p1n1b3/1p1pp3/8/1PP1NN2/P1B3PP/R1BQ2K1 b - - 0 17 | e4 | Is the d-file open, semi-open, or closed? | semi-open for White | files |
8/8/3k4/5R2/4K3/8/8/8 w - - 5 4 | Re5 | What piece is on f1? | Empty | occupancy |
b7/P4Q2/8/3p1k2/3B4/2P3pP/1q4P1/4R1K1 b - - 3 41 | g8f7 | Is the White king in check? | No | check |
k2r4/p1pbqpp1/B1p5/3pP3/5Ppr/6Q1/PPP3P1/RN3RK1 b - f3 0 18 | Rdh8 | Is the move from e7 to f4 legal? | No | legality |
5bk1/p1r2ppp/1p6/1P1p4/7P/P1N1r1Pn/QB2N1q1/2R1KR2 w - - 0 30 | Qxd5 | Identify any Black knight outposts on the board. | c4, e4 | outposts |
5r2/Pq2Nppk/b7/8/8/2R5/5PP1/5BK1 w - - 0 3 | Rh3# | Identify any Black knight outposts on the board. | None | outposts |
r1bqrnk1/2p2pp1/2p4p/p3p3/2P1P3/1P2QNNP/P4PP1/R3R1K1 b - - 0 20 | Qe7 | What piece is on f3? | White Knight | occupancy |
1n6/4k2p/p3pp2/1pPp1Pp1/3P2P1/3NP3/P3K2P/8 w - - 0 28 | Nb4 | What piece is on g8? | Empty | occupancy |
r1b1kb1r/pppn2pp/8/3Pp3/3P2q1/8/PP1N3P/R1BQKBNR b kq - 4 12 | Qh4+ | Identify any White knight outposts on the board. | e5, e6 | outposts |
6k1/5pp1/1p5p/2b3r1/P3pN2/1Q2Pn1P/1B1r1PP1/7K b - - 2 42 | Bxe3 | Is the move from c5 to f5 legal? | No | legality |
r1bqk2r/pp1n1ppp/5n2/3p1N2/8/BP1BP3/P2N1PPP/Q3K2R b Kkq - 2 12 | Qa5 | Identify any White knight outposts on the board. | d4 | outposts |
1r1q1bnr/pQ2kppp/4p3/8/B2P4/2N5/PPP2PPP/R1B1K2R b KQ - 2 11 | d7a4 | Is the Black king in check? | Yes | check |
r1bqkb1r/5pp1/p3pn1p/2pp4/8/2N2N2/PPP2PPP/R1BQR1K1 b kq - 1 13 | d4f3 | What is the material balance in this position? | Black is up 1 pawn of material | material |
8/7p/5k2/p2r4/2R5/5K2/7P/8 w - - 0 47 | Rc7 | Does White have any isolated pawns? | Yes: h2 | structure |
r1b1k1nr/pppp2pp/1bn5/1B1Pp3/4N2q/2P1pQ2/PP3PPP/RNB1K2R b KQkq - 3 9 | Nf6 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r1b1kb1r/2qp1ppp/p3pn2/1p6/2BNPP2/2N1B2P/PPP3P1/R2Q1RK1 b kq - 0 11 | Qxc4 | Identify any White knight outposts on the board. | None | outposts |
rnb2r2/p1q2pbk/1pp3pn/4P1B1/2B3PQ/5N1P/P1P5/1R3RK1 w - - 2 24 | Bxh6 | What is the material balance in this position? | Black is up 3 pawns of material | material |
1r4k1/5p2/3Q2p1/8/3Rq3/2p4P/2Pn2PK/1r1R4 b - - 1 37 | Qe6 | Does Black have any passed pawns? | No | structure |
8/7R/1p4pk/7p/K7/P7/1r6/8 b - - 3 61 | Kxh7 | Is the move from b2 to f1 legal? | No | legality |
2r1r2k/4P1p1/2P2p1p/1p3N1P/p3P3/3n2P1/P4P2/5BK1 w - - 1 40 | Bxd3 | Does White have any passed pawns? | Yes: c6, e7 | structure |
8/5K2/6p1/5pkn/7p/7P/R5P1/8 w - - 46 69 | Ra4 | What piece is on h4? | Black Pawn | occupancy |
k5r1/6qp/p3pp2/2b2p2/P3b3/1pP2N1P/3Q1PP1/2R3RK b - - 3 31 | Qb7 | What is the material balance in this position? | White is up 1 pawn of material | material |
8/2pNnBk1/p4Rp1/P7/1p2P1p1/1N1Pq1P1/1PP2RK1/7r b - - 6 32 | Qh6 | Does White have any passed pawns? | Yes: e4 | structure |
rq2k1nr/ppp2Qbp/2n3p1/4P3/2BP4/2N5/PP3PPP/R1B1K2R b KQkq - 0 12 | f3f7 | Is the Black king in check? | Yes | check |
r5k1/5pp1/1b1pq2p/1p3P1P/2p3Q1/2P2N2/1P3PP1/4R1K1 b - - 0 30 | Qd7 | Is the Black king in check? | No | check |
r2qnrk1/pp1bppbp/3p2p1/4P1B1/8/2N4P/PPPQ1PP1/2KR1B1R w - - 1 12 | Nd5 | Are there any open files in this position? | No | files |
7k/1R4r1/7p/p2p3P/P2P1K2/5P2/1P6/8 w - - 0 44 | Rxg7 | What piece is on g6? | Empty | occupancy |
1qb2rk1/4npbp/1p4p1/1Pp1p3/2Pp4/3P2P1/1BQNPPBP/R5K1 b - - 0 19 | Bg4 | Is the move from d4 to c1 legal? | No | legality |
2r1R1k1/5p1p/p1n3pB/1p1p4/1P1P4/2PB1PP1/8/RN4K1 b - - 0 23 | e1e8 | Is the Black king in check? | Yes | check |
1r1qr1k1/1p1b1pbp/p2p2p1/2pPn2n/P3P3/N1N3PP/1P3PB1/R1BQ1RK1 w - - 1 16 | a5 | What piece is on e1? | Empty | occupancy |
3r3r/pppkq1pp/8/6P1/4p3/P3Q3/1P4PP/4RRK1 w - - 4 21 | e8d7 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r1bq1bk1/ppr5/2n4p/3pPBp1/8/P1P2N1Q/2P2P1P/R1B1R1K1 b - - 0 21 | g4 | What is the material balance in this position? | White is up 1 pawn of material | material |
1R6/8/1k2p3/3bPp2/5K2/8/8/6q1 b - - 14 83 | Bb7 | Does White have any isolated pawns? | Yes: e5 | structure |
r2q1rk1/2p2pp1/2Pp1b1p/1p2p3/4P1b1/2N2N2/PPP2PPP/R2Q1RK1 w - - 0 13 | Nd5 | Is the Black king in check? | No | check |
1k1r1r2/p2p1p2/8/4Q2p/4P3/P1P4P/1P3PP1/5RK1 b - - 0 20 | c5e5 | Is the Black king in check? | Yes | check |
r5rk/ppq2p1p/3bp1n1/3p1p1N/3P2P1/2PB1Q1P/PP3P2/R3R2K w - - 3 19 | Bc2 | Are there any open files in this position? | No | files |
1r1q2k1/6p1/2R3p1/p2pPp2/3P1P2/Q6P/1P4P1/6K1 b - - 0 33 | Qh4 | Is the b-file open, semi-open, or closed? | semi-open for Black | files |
3Q4/p7/8/1p6/4R3/1r1k1PK1/6P1/8 b - - 2 35 | h8d8 | Is the White king in check? | No | check |
rnbqk2r/pp3pp1/2p1pn1p/3p4/2PP3B/P1b1P3/1P3PPP/R2QKBNR w KQkq - 0 8 | b4c3 | Is the White king in check? | Yes | check |
r1b2rk1/ppp1nppp/1q6/1N2p3/P7/2P5/1P2BPPP/R2Q1R1K b - - 0 17 | a6 | Is the move from g8 to b3 legal? | No | legality |
8/6pk/1p5p/3r4/1P1R4/3pK1P1/2bR3P/8 b - - 6 37 | Re5+ | Does Black have any isolated pawns? | Yes: b6, d3 | structure |
8/1r2k3/6p1/1N6/p1p4P/P2KB1P1/1P6/8 w - - 0 47 | Kxc4 | Identify any White knight outposts on the board. | g5 | outposts |
3r4/pbk3Qp/2n5/3n2p1/5p2/8/PP4PP/1R4K1 b - - 2 26 | c3g7 | Is the White king in check? | No | check |
8/p7/5p1p/6p1/1PK3P1/1Bp2P1P/1kP5/1n6 w - - 1 55 | Kd3 | Is the move from b3 to c4 legal? | No | legality |
rnbqkb1r/pp1ppppp/5n2/2p5/2P5/1P6/PB1PPPPP/RN1QKBNR b KQkq - 2 3 | e6 | Are there any open files in this position? | No | files |
8/8/4k3/8/3P1K1r/4PP2/7p/7R w - - 4 54 | Kg3 | What is the material balance in this position? | White is up 2 pawns of material | material |
r2qkb1r/pbpn1pp1/1pn1p3/3pP3/5P1p/3P1NPB/PPPNQ2P/R1B1K2R b KQkq - 1 10 | hxg3 | Does White have any passed pawns? | No | structure |
5rk1/7p/pp1p2p1/2pPr2n/P2bPp1P/2BB4/RP4Q1/7K b - - 0 33 | f3 | Is the White king in check? | No | check |
8/5pk1/p4p2/3r3p/2qP1Q1P/5P2/1P1R2PK/8 w - - 6 41 | g4 | Is the move from d2 to f2 legal? | Yes | legality |
rnb1kb1r/pppp2q1/5pp1/4p3/2B4N/2P5/PPP3PP/R1BQK2R w KQkq - 0 10 | Qg4 | Is the d-file open, semi-open, or closed? | semi-open for White | files |
3r1qrk/p1pn1p2/1pb1pn1p/6p1/2PP1PP1/2PBB1RP/P1QN3K/4R3 w - - 3 21 | Nf3 | Identify any Black knight outposts on the board. | a5 | outposts |
r2qk2r/1bpn1pp1/pp2pn1p/8/1b2P3/1PN2NP1/PBPQ1PBP/2KRR3 w kq - 1 13 | Qf4 | Is the move from d2 to h1 legal? | No | legality |
r4rk1/3R1pp1/p6p/1p2Qb2/7q/1P6/PP3PPP/5RK1 b - - 0 21 | e1e5 | What is the material balance in this position? | Black is up 2 pawns of material | material |
5rk1/ppB2ppp/2p2b2/5N2/4P3/6Q1/PPP2PPP/3rR1K1 b - - 0 19 | Rxe1# | What is the material balance in this position? | White is up 8 pawns of material | material |
3R4/2r4p/2p5/p4p2/1k3P1p/2n1PP2/2B3K1/8 w - - 1 54 | Rd4+ | Is the White king in check? | No | check |
7k/4P1pp/8/3B1p1K/3P4/4Q1P1/8/5q2 b - - 0 37 | Qh3+ | Does White have any isolated pawns? | Yes: g3 | structure |
rnbqk2r/ppp1ppbp/3p1np1/8/3PP3/5N2/PPP1BPPP/RNBQK2R w KQkq - 2 5 | Nc3 | What piece is on e6? | Empty | occupancy |
6k1/pbq4p/1p2prp1/2p1N3/5r2/1P6/P1Q2PPP/3RR1K1 w - - 2 24 | d4f4 | What is the material balance in this position? | Black is up 1 pawn of material | material |
8/k3R3/1p6/p1p3p1/qnBn2Qp/5P2/1P6/1K6 b - - 1 45 | Kb8 | What piece is on g5? | Black Pawn | occupancy |
2krr3/pp3B2/2p5/8/2pN1P2/P1nb2PP/7K/3RR3 b - - 0 29 | h5f7 | Identify any White knight outposts on the board. | e5, f4, g4, g5, h4 | outposts |
1r4k1/3nppbp/p2p2p1/3N4/2b5/6P1/P2qPPBP/2RR2K1 w - - 0 21 | Nxe7+ | What piece is on d2? | Black Queen | occupancy |
rnb3r1/pp1pQ2p/2k1p3/2p5/4P3/2N5/P1PN1PPP/2qBK2R w K - 3 17 | e5 | Is the move from g2 to b7 legal? | No | legality |
r3k1r1/ppp1qp1p/2bp2p1/4B3/8/2Q5/PPP2PPP/2KR2NR b q - 4 18 | Qxe5 | Is the move from f7 to f5 legal? | Yes | legality |
1r1r4/pb1q2kp/1p3pp1/2pp1P2/6PP/2PPN3/PP4Q1/3R1RK1 w - - 0 25 | d4 | What is the material balance in this position? | Equal | material |
r1bq1rk1/1pp2p2/p1np1n2/2b1p1p1/P1B1P2B/2NP4/1PP2PPP/R2Q1RK1 w - - 0 11 | Bxg5 | What is the material balance in this position? | Black is up 2 pawns of material | material |
2krr3/ppqn1pp1/3bp2p/2pP3P/2P3Q1/5NP1/PP1B1P2/2KR3R b - - 2 18 | exd5 | Does Black have any isolated pawns? | No | structure |
r1b1k2r/pp2npp1/2n1p2p/q2pP3/P1pP4/2P4N/2PB1PPP/R2QKB1R b KQkq - 1 11 | Ng6 | Is the White king in check? | No | check |
2r1n1k1/pp3ppp/1n2b3/PP2p3/1B2P3/3BNP2/3K2PP/R7 b - - 0 28 | Nd7 | Does Black have any isolated pawns? | No | structure |
6k1/p1q3p1/2p2b2/P1Pp4/3P1r2/2B4r/1PQ4P/1K3RR1 w - - 0 36 | Qg6 | What is the material balance in this position? | White is up 1 pawn of material | material |
5rk1/1b3ppp/1p2pn2/8/1Pn4P/4P3/1PQ2PP1/rNKR3R b - - 4 21 | Rc8 | Are there any open files in this position? | Yes: a, c, d | files |
6kR/5p2/4bPp1/2b1p1P1/4P3/8/p1q5/7K b - - 3 45 | Kxh8 | Is the move from f7 to d4 legal? | No | legality |
r1b2rk1/4ppbp/pn1p2p1/1p6/2BpPN2/5P2/PP4PP/1KR1Q2R b - - 0 16 | Nxc4 | What is the material balance in this position? | White is up 4 pawns of material | material |
rnbk1b1r/pppn1ppp/8/3NP3/4p3/5P2/PPP3PP/R1BK1BNR w - - 3 8 | Bg5+ | Identify any Black knight outposts on the board. | None | outposts |
1k5r/ppp2ppp/8/2PnP3/3N1P2/2P5/P2r2PP/R4RK1 w - - 3 20 | e6 | What is the material balance in this position? | White is up 1 pawn of material | material |
2r3k1/2r2p1p/3Q1PpP/2p5/2B5/8/P4PK1/8 w - - 5 60 | a4 | Are there any open files in this position? | Yes: b, d, e | files |
r2q1r1k/ppp3p1/1bnpQn1p/4p3/1P2P3/2PP1N1P/P2N1PP1/R1B2RK1 b - - 2 12 | b1d2 | What is the material balance in this position? | White is up 1 pawn of material | material |
r1bqkb1r/pp1nnppp/4p3/2PpP2Q/8/5N2/PPP2PPP/RNB1KB1R w KQkq - 4 7 | Nc3 | Are there any open files in this position? | No | files |
4kb1r/5ppp/q1R1p3/1b1p4/Np1PnB2/1Q2PN2/PP4PP/R2K4 b k - 0 22 | Bxc6 | Are there any open files in this position? | Yes: c | files |
rn3knr/1q3ppp/2p5/p7/4pp1P/p2P1P2/RPP1KP2/8 w - - 0 20 | a7a5 | Identify any Black knight outposts on the board. | f3 | outposts |
r2q2k1/pQ2npbp/n2p2p1/P2Pp3/2r1P1b1/2N1B1P1/1P3PBP/R4RK1 w - - 0 19 | Qxa6 | What piece is on a5? | White Pawn | occupancy |
rn1k1b1r/1p2npp1/p3p1b1/1B1qN2p/P1NP1BPP/8/1P2QP2/R3K2R w KQ - 0 19 | Nb6 | Does White have any isolated pawns? | Yes: d4 | structure |
rnbq1rk1/1ppnbpp1/3p3p/p3P3/PPBP4/1Q3N2/3N1PPP/R1B1K2R w KQ - 1 13 | b5 | Is the move from c1 to e2 legal? | No | legality |
4r3/pp4Np/n1p3p1/7b/2BP4/2P3b1/PP3K1k/R1B5 w - - 8 31 | d6g3 | Is the Black king in check? | No | check |
2rq1rk1/p1n4p/b2p1pp1/1p1Pn3/1p2PB2/8/P1QNBPPP/R1R3K1 w - - 2 19 | Qb3 | Identify any White knight outposts on the board. | d5 | outposts |
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