fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
1r1q1r1k/6pp/p1npb3/3Np1b1/2P1Pp2/pP1Q1B2/2N2PPP/3R1RK1 w - - 0 20 | Nxa3 | Is the c-file open, semi-open, or closed? | semi-open for Black | files |
8/pR4pk/1b6/8/8/3p4/P1pK2PP/8 b - - 1 7 | Be3+ | What piece is on e8? | Empty | occupancy |
8/ppk5/3p4/K1P5/q7/2n5/5p2/8 w - - 0 54 | e4a4 | Is the White king in check? | Yes | check |
r3r1k1/2b1qpp1/p6p/1ppnPPP1/3p4/1P1P1N1P/1P1B1Q2/R3R2K b - - 0 32 | Qd7 | Is the move from g8 to e3 legal? | No | legality |
r2q1rk1/p4ppp/bpnp1n2/2p1p3/2PPP3/P1PB4/4N1PP/R1BQ1RK1 w - - 0 14 | Bg5 | Is the move from f1 to f4 legal? | Yes | legality |
3Q4/5r1k/b2p2pB/p2Pp3/n3P3/8/P5PK/8 w - - 4 45 | Be3 | What piece is on c1? | Empty | occupancy |
8/5R2/8/3k1p1p/p6P/4PKP1/r7/8 b - - 3 64 | Kc4 | Is the move from h5 to d8 legal? | No | legality |
1n1qkbnr/p1p1p1pp/1p6/1B6/3p1p2/2N2N2/PPPP1PPP/R1BQK2R b KQk - 1 9 | a6b5 | Is the Black king in check? | Yes | check |
r1rq2k1/1p2bppp/2bp1n2/2nNp3/2P1P3/1PN1BP2/3QB1PP/1R3RK1 w - - 7 20 | b4 | Is the move from g1 to h1 legal? | Yes | legality |
r1bqkb1r/pp3ppp/3ppn2/1Qn5/4P3/2P2P2/PP4PP/RNB1KBNR b KQkq - 1 7 | e2b5 | Is the White king in check? | No | check |
r2q1rk1/1b1n1pp1/pP3n1p/8/N2BP3/bP3P2/2PQ2PP/1K1R1B1R w - - 3 21 | g4 | Identify any Black knight outposts on the board. | None | outposts |
r1bq1rk1/1p3ppp/p1nbpn2/4N3/P2P4/2N1B3/1PB2PPP/R2QR1K1 b - - 10 16 | h6 | Does Black have any isolated pawns? | No | structure |
5bk1/1p3pp1/p1r4p/8/PP2Pp2/5P1q/4QP1N/1R5K b - - 3 34 | Bxb4 | Is the d-file open, semi-open, or closed? | open | files |
1k1r1b1r/p7/1pB2n2/2p1B2q/P1P3p1/3P4/5PP1/1R1Q1RK1 b - - 0 24 | c3e5 | Is the Black king in check? | Yes | check |
1r1r3k/2b4p/4q1p1/3n1p1R/3P4/1B1QBP2/5P1P/6RK w - - 2 34 | Rh6 | Identify any White knight outposts on the board. | c5 | outposts |
4r1k1/5pp1/1rp2q1p/2R2b2/1P2p3/5PP1/3Q2BP/2R3K1 w - - 0 35 | fxe4 | Is the move from f3 to g7 legal? | No | legality |
6k1/8/2p4p/R2p4/8/8/P3r1B1/7K b - - 0 36 | Kf7 | Is the move from e2 to b5 legal? | No | legality |
2r3k1/p1r1pp1p/b2p2p1/q2P4/B3P3/5P1P/5QP1/RR4K1 w - - 0 4 | Bc6 | Are there any open files in this position? | Yes: b, c | files |
3k4/5n1p/P2p2p1/1bpPp3/2P1Pp2/5P2/2B3PP/6K1 w - - 0 41 | a7 | Are there any open files in this position? | Yes: b | files |
8/4n1K1/2k3p1/8/8/5PP1/7P/8 b - - 2 47 | h7g7 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r1bq1rk1/pp2ppbp/3p1np1/8/2P1P3/2N1BP2/PP1Q2PP/R3KB1R b KQ - 2 10 | Be6 | Is the move from b7 to b6 legal? | Yes | legality |
6k1/p3rpp1/2p4p/3pnq2/3QP3/2N3Pb/PP3P1P/4R1KB w - - 1 26 | exf5 | Are there any open files in this position? | No | files |
6k1/pp5p/3p2p1/3Pbb2/3r4/2R4P/P3pPB1/2R1B1K1 b - - 0 29 | Rd1 | What is the material balance in this position? | White is up 3 pawns of material | material |
8/8/5k2/1p2p1Pp/5n2/P1P2PK1/1p1r4/8 b - - 0 55 | h4g5 | Is the Black king in check? | Yes | check |
2bq1b1r/2Nk1p1p/2np4/3Npp2/1r2P3/8/P1P2PPP/R2QK2R w KQ - 2 15 | O-O | What is the material balance in this position? | Black is up 2 pawns of material | material |
r1bq1rk1/ppp1bppp/2n2n2/4p3/2P5/2NPBNP1/PP3PBP/R2Q1RK1 w - - 2 10 | Re1 | Is the e-file open, semi-open, or closed? | semi-open for White | files |
6k1/2p2ppp/p1n5/1p5P/6n1/2P2q1K/PP3b2/R1B3R1 w - - 2 29 | g3f2 | Is the White king in check? | Yes | check |
rnb2rk1/pp2ppbp/3p1np1/q7/4PP2/2NBBN2/PPP1Q1PP/R3K2R w KQ - 4 10 | h3 | Is the c-file open, semi-open, or closed? | semi-open for Black | files |
8/8/3R4/2pN1bk1/Pp2r3/4K3/1PP3P1/8 w - - 4 43 | d4e4 | Is the White king in check? | Yes | check |
6k1/5p1p/2pp1BP1/4p3/4P1P1/3P1Q2/r4P2/K5R1 w - - 0 35 | a8a2 | Is the White king in check? | Yes | check |
1k6/1Pb4q/Qn3Bp1/8/4N3/1B1KPP2/PP4r1/8 b - - 2 35 | Qh5 | Are there any open files in this position? | Yes: c, d, h | files |
8/7p/2NkPp2/pp1p2p1/3P2P1/4P3/P3K2P/8 b - - 0 31 | Kxc6 | Does White have any isolated pawns? | Yes: a2 | structure |
1k6/1b6/pp1N4/3p4/5r1p/P4P2/1P4PP/R5K1 w - - 2 34 | c8b8 | What is the material balance in this position? | White is up 1 pawn of material | material |
2kr4/1b2q1rp/2nbpn2/p2pNp2/1ppP1P2/2P1PN1Q/PPB3PP/1RB2RK1 w - - 9 18 | g8g7 | What is the material balance in this position? | White is up 1 pawn of material | material |
1k6/p4p2/4p3/8/1p2P3/1N6/1K4P1/3r4 b - - 0 44 | Kc7 | Is the move from b8 to c7 legal? | Yes | legality |
7r/6p1/4p3/2bkR3/1p1p1P2/p1p2K1P/2P5/7R b - - 1 52 | Kc4 | Is the move from d5 to c6 legal? | Yes | legality |
8/8/2p3pp/p1pk4/6PP/PP2K1P1/8/8 w - - 1 38 | e5d5 | Identify any White knight outposts on the board. | a4, c4 | outposts |
r4rk1/pbpn1p1p/1p2p1p1/6Q1/7P/3P4/PPP1BPP1/R4RK1 w - - 1 18 | b8d7 | What is the material balance in this position? | White is up 6 pawns of material | material |
r1br3k/p4Rp1/1Pp4p/8/2BP4/2N2NP1/1P3P1P/n5K1 b - - 0 22 | axb6 | Identify any Black knight outposts on the board. | b5, d5 | outposts |
5r2/ppp1q3/1b2B2R/4n1P1/1k1pQ3/1N4P1/PPP2P2/2K5 w - - 11 30 | Qxe5 | Does Black have any passed pawns? | No | structure |
5r2/1p2p1k1/1NppB2r/p1P3p1/8/1P2RpP1/P4K2/8 w - - 9 40 | Nd7 | What is the material balance in this position? | Black is up 2 pawns of material | material |
8/8/3Q3p/7k/4qp2/8/5K2/8 w - - 0 9 | Qf6 | Is the move from f2 to f1 legal? | Yes | legality |
8/2R2p1p/kp3Q2/p7/2N1q3/1P4P1/5PKP/r7 w - - 3 31 | c2e4 | Identify any White knight outposts on the board. | f4, h4 | outposts |
3Q4/8/2N5/8/1P4k1/3K3p/8/8 w - - 1 48 | g5g4 | What is the material balance in this position? | White is up 12 pawns of material | material |
6R1/p1pnR3/1p1p1r1p/n4k2/5q2/P1P5/3Q4/4K3 w - - 4 32 | Qd3+ | What is the material balance in this position? | Black is up 4 pawns of material | material |
r1b4r/1p1k2p1/p1q1p2p/7Q/1b4P1/2nB4/P2B3P/3RKR2 b - - 1 25 | Qd5 | Is the move from h6 to d1 legal? | No | legality |
2b3k1/1pPp1ppp/8/5P2/1K4P1/4r3/2P4P/rq6 w - - 1 28 | f1b1 | Is the White king in check? | Yes | check |
2r2b2/3n1k1p/r7/p1pP1p2/1pR1p3/1N2B1PP/PP3P2/2R3K1 b - - 3 31 | Ne5 | Is the g-file open, semi-open, or closed? | semi-open for Black | files |
r3r1k1/5bp1/3p1p1p/p3p3/P2p2P1/1P3R2/3B1P1P/4R1K1 w - - 1 29 | g6f7 | Identify any White knight outposts on the board. | a4 | outposts |
2r1r2k/3qbpp1/1p3n1p/p1p1pP2/PnPpN1PP/1P1P1P1B/4Q2K/R1B3R1 w - - 2 28 | g5 | What piece is on b1? | Empty | occupancy |
1k1r4/1pq2pr1/p1b1p3/2R1P3/8/2N1BB2/PPPN1P2/2KR4 w - - 1 29 | b3 | What is the material balance in this position? | White is up 1 pawn of material | material |
r1b1kb1r/pppp1ppp/2n3q1/3Q2B1/2B1P3/8/PPP2PPP/RN2K2R w KQkq - 7 9 | Nc3 | Is the Black king in check? | No | check |
rn2kb1r/pp2pppp/5n2/3N1b2/3P4/1q2P3/PP3PPP/R1B1KBNR w KQkq - 0 8 | Nxf6+ | Is the Black king in check? | No | check |
8/1Bk5/P6p/1b1p2pP/3K2P1/8/8/8 b - - 7 4 | Be2 | What piece is on d5? | Black Pawn | occupancy |
1r3rk1/1p2bpp1/pq1pbn1p/2p5/2n1P3/1PBN1P2/P1QN2PP/1KR2B1R w - - 0 23 | e5c4 | What is the material balance in this position? | Black is up 1 pawn of material | material |
8/3kb3/4n3/1p1pPp2/3p1P1p/pP1N3P/P3KB2/8 w - - 6 66 | Bg1 | Does White have any isolated pawns? | Yes: h3 | structure |
1rq3k1/1p2rp2/2n1p1pb/pRN4p/P1PpQ3/3P2PP/5PB1/1R4K1 w - - 4 29 | Qxc6 | Identify any White knight outposts on the board. | None | outposts |
r3k2r/pppqnppp/2nb4/3p2B1/3P2b1/2PB1N2/PP1N1PPP/R2QK2R w KQkq - 3 9 | Nf1 | Is the e-file open, semi-open, or closed? | open | files |
7k/6p1/6p1/p7/P1P1Pp2/5q1P/2Pr4/6RK w - - 0 37 | h5f3 | Is the White king in check? | Yes | check |
r7/8/pr1p4/Rp1Ppp1p/1P5k/2P1KP2/1P6/6R1 b - - 1 36 | Rbb8 | What piece is on b5? | Black Pawn | occupancy |
8/1kp2pp1/p5p1/3np3/6P1/2r4r/P1K1R3/8 w - - 0 33 | f3c3 | Is the White king in check? | Yes | check |
r1bq1bk1/ppr5/2n4p/3pPB2/6Q1/P1P2N2/2P2P1P/R1B1R1K1 b - - 0 22 | Rg7 | Does Black have any isolated pawns? | Yes: d5, h6 | structure |
r1bq1rk1/pp2nppp/3b4/2pP4/2P5/2N2N1P/P4PP1/R1BQ1RK1 b - - 0 12 | Ng6 | Is the move from f7 to f5 legal? | Yes | legality |
4rrk1/pb1qnpb1/6pp/3pn3/1p1PPNP1/6QP/1PP2RB1/2BN1R1K b - - 0 26 | N5c6 | Is the a-file open, semi-open, or closed? | semi-open for White | files |
1r2r3/p4pk1/2p2n2/2Np1bp1/8/1PR4P/P3PPB1/4R1K1 w - - 2 25 | Kf1 | Is the move from c3 to e3 legal? | Yes | legality |
8/1r3p2/R3p2p/3k2p1/1P6/2K2PP1/7P/8 w - - 0 43 | Ra5+ | Is the Black king in check? | No | check |
8/3k2p1/R3n3/2p1P3/4K3/8/8/8 w - - 10 47 | Rb6 | What is the material balance in this position? | White is up 1 pawn of material | material |
r4rk1/p1q2pp1/2pnp3/3nP1p1/3Q4/5BP1/P4P1P/2R2RK1 w - - 0 20 | b7d6 | What is the material balance in this position? | Black is up 4 pawns of material | material |
8/p7/8/1p6/1P2p3/P3Pk2/8/4K3 b - - 3 42 | Kxe3 | What piece is on g2? | Empty | occupancy |
1r1r1bk1/5pp1/5qnp/1pP5/3Np3/1Q2B2P/1P3PP1/R1R3K1 w - - 2 24 | Ra7 | What piece is on h7? | Empty | occupancy |
2kr1b1r/p1p2p1p/1pn1b3/2p1Pp2/2P2P2/2N1B3/PP3KPP/R4B1R w - - 1 18 | Nd5 | What is the material balance in this position? | Equal | material |
2r1nbk1/1p3r1p/p2p2n1/P2PpqB1/R3N3/2N3P1/1P2QP2/4K2R w K - 3 25 | Rb4 | Identify any White knight outposts on the board. | h4 | outposts |
2r1rbk1/2q2ppp/2n1b3/pp1pPpB1/7P/PNP2N2/1P1Q1PP1/R3R1K1 w - - 0 18 | Nbd4 | Is the Black king in check? | No | check |
rn1qkb1r/1b3ppp/p2ppn2/8/1p1NP1P1/2N4P/PPP2PB1/R1BQ1RK1 w kq - 0 10 | Nd5 | Does Black have any passed pawns? | No | structure |
r1b2rk1/1pp3bp/3npqp1/p5N1/2pP1B2/P5PB/1P2QP1P/1R1R2K1 b - - 3 19 | Bh6 | What is the material balance in this position? | Black is up 1 pawn of material | material |
4b3/pB2kppp/1q2p3/8/2P5/1P3QP1/P2rrPKP/R4R2 b - - 4 25 | Re3 | Does Black have any passed pawns? | No | structure |
r1b3k1/pp1n1rpp/2p5/3P4/3P4/1PBQ1Pq1/P5B1/R3R1K1 b - - 0 21 | Nf6 | Does White have any isolated pawns? | Yes: d4, d5, f3 | structure |
rnb1k2r/pp3ppp/4pn2/3q4/3P4/5N2/PP1bBPPP/RN1QK2R w KQkq - 0 9 | Nbxd2 | What piece is on f3? | White Knight | occupancy |
r3r3/ppkqnQ1p/3R4/6B1/3P4/2P4P/PP4P1/4R1K1 b - - 0 21 | Kxd6 | Is the move from d7 to g4 legal? | Yes | legality |
8/p3k1pp/2N1p3/P3Pp2/1PK1n2P/8/8/6b1 b - - 4 40 | d8c6 | Is the Black king in check? | Yes | check |
1R6/1P3pk1/4p1p1/4P1Pp/5P1P/8/1K6/2r5 b - - 21 11 | Rc7 | Is the Black king in check? | No | check |
rbkqbnnr/pppppppp/8/8/8/8/PPPPPPPP/RBKQBNNR w KQkq - 0 1 | c4 | Is the move from g2 to g4 legal? | Yes | legality |
6k1/2r4p/1pNnp1p1/1Pq1NpP1/p1P2P2/Pn5P/1Q6/1K1R4 w - - 5 40 | Ka2 | Is the d-file open, semi-open, or closed? | open | files |
r1bqkb1r/pp1npppp/5n2/3P4/Q7/8/PP1P1PPP/RNB1KBNR w KQkq - 3 6 | Nc3 | What is the material balance in this position? | White is up 1 pawn of material | material |
r4rk1/pb1qppb1/1p1p2pp/7n/3NP2B/1PN2P1P/1PPQ2P1/R3R1K1 b - - 0 16 | e5 | Is the move from h5 to g3 legal? | Yes | legality |
rnb3k1/pp1n1rbp/3pp3/q3P1N1/2B2P2/8/PBP1K1P1/R2Q3R b - - 2 14 | Nf8 | What piece is on g6? | Empty | occupancy |
r1r3k1/1b3pp1/p2p1n1p/4p3/2P1P2P/qN3P2/B1R2KP1/2QR4 b - - 4 33 | Qb4 | Does Black have any passed pawns? | Yes: a6 | structure |
4rr1k/pp1b3p/1qn1p1p1/3p4/1P1P1bn1/2BQ1NN1/P1B1RPPP/R5K1 b - - 1 19 | Re7 | Are there any open files in this position? | Yes: c | files |
6k1/pp5p/3p2p1/3P1b2/3r1b2/1R5P/P3NPB1/2r1B1K1 w - - 0 30 | Nxd4 | Identify any Black knight outposts on the board. | f5, h5 | outposts |
rq3k2/3n2Rp/p2p4/3b1rP1/1p1B1P1P/5Q2/PPP5/2K4R w - - 1 23 | Qh5 | Is the Black king in check? | No | check |
1r3rk1/2p3bp/Q1Rp2p1/P2P4/1q1p4/6N1/5PPP/5RK1 b - - 0 26 | Ra8 | Is the White king in check? | No | check |
r4b1r/ppNnkpp1/2n1N1p1/3pP3/3p3q/3Q4/PPP2PPP/R1B2RK1 w - - 3 14 | Bg5+ | What is the material balance in this position? | Equal | material |
rnbqkb1r/pppp1ppp/4pn2/6B1/3PP3/8/PPP2PPP/RN1QKBNR b KQkq - 0 3 | c5 | What is the material balance in this position? | Equal | material |
r3r1k1/pp5p/5p2/3p4/2pPb3/P3PPB1/1P1K3P/R6R b - - 0 22 | Bg6 | Identify any Black knight outposts on the board. | None | outposts |
r2q1rk1/pb6/2n1pbQp/1p6/2pP4/2P5/PPB2PPP/R1B2RK1 b - - 0 16 | Bg7 | What is the material balance in this position? | Black is up 1 pawn of material | material |
4rn2/1p2pk2/3p1pp1/3P4/2PBB1P1/1P2Q2R/q4PK1/r7 w - - 4 35 | Rh8 | Does Black have any isolated pawns? | Yes: b7 | structure |
5N2/r2nR1p1/1p3pk1/2p5/3p4/3P3P/2PK2P1/8 b - - 6 42 | h7f8 | Is the Black king in check? | Yes | check |
r1b2rk1/pp3pb1/3p1BQ1/2p2p2/2B5/2NPq3/PPP3PP/R6K b - - 4 18 | Qh6 | What is the material balance in this position? | Black is up 2 pawns of material | material |
8/8/8/8/8/p4N2/Nk2K3/8 w - - 44 114 | Kd2 | Is the move from f3 to e1 legal? | Yes | legality |
r2r1n1k/2p1q1p1/1b3p1p/p1p1pQ1N/2P1P3/1P2B2P/P4PP1/3RR1K1 w - - 3 27 | f4 | What piece is on e3? | White Bishop | occupancy |
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