[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1r2r1k1/pR3ppp/8/3B4/n2p2b1/3P2P1/3KP2P/6NR w - - 3 21

[Assistant] Bxf7+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 e5 2. c4 exd4 3. Nf3 Nc6 4. Nxd4 Bc5 5. Nxc6 Qf6 6. e3 dxc6 7. Be2 Bd7 8. Bf3 O-O-O 9. Qe2 Ne7 10. O-O Ng6 11. Nc3 Ne5 12. Ne4 Nxf3+ 13. Qxf3 Qxf3 14. gxf3 Be7 15. b3 Rhe8 16. Bb2 f5 17. Ng3 g6 18. Rad1 h5 19. f4 h4 20. Ne2 g5 21. fxg5 Bxg5 22. Nf4 c5 23. h3 Bc6 24. Kh2 Bxf4+ 25. exf4 Re4 26. Rxd8+ Kxd8 27. Rd1+ Ke7 28. Be5 Re2 29. Kg1 Rxa2

[Assistant] Bxc7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 Nf6 2. Nc3 g6 3. d4 d5 4. Bf4 c6 5. Qd2 Bg7 6. Bh6 Bxh6 7. Qxh6 Bf5 8. O-O-O Nbd7 9. h3 Qa5 10. Qf4 O-O-O 11. g4 Be4 12. g5 Nh5 13. Qe3 f5 14. gxf6 Ndxf6 15. Rg1 Rhf8 16. Ne5 Bf5 17. Qg5 Ne4 18. Nxe4 Bxe4 19. Kb1 Rxf2

[Assistant] Bg2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6k1/5pp1/7p/8/7n/4NP1P/2r3PK/4R3 b - - 11 42

[Assistant] Nxf3+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: Qn2k2r/p4ppp/2p1p3/2b1q3/2P1pPb1/6P1/PP1PP1BP/R1B1K2R b KQk f3 0 11

[Assistant] exf3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r2n4/ppp2Rpk/4Q2p/3p4/4P3/P2Pq2P/2P3PK/8 w - - 2 22

[Assistant] Qf5+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/5rk1/4Q2p/P3p2q/4P1n1/2PP4/3R1PP1/R5K1 b - - 0 31

[Assistant] Qh2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/2p1Rp2/8/p7/1p5p/kP6/PbK5/8 w - - 0 46

[Assistant] Rxc7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 g6 2. e4 Bg7 3. c4 d6 4. Be3 Nf6 5. f3 O-O 6. Nc3 Na6 7. Qd2

[Assistant] c5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. b4 b6 2. Bb2 Bb7 3. c4 e6 4. d3 f5 5. a3

[Assistant] Nf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. f4 cxd4 5. Nd5 Nc6 6. Nf3 e6 7. Qe2 exd5 8. exd5+ Nge7

[Assistant] d6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Qc7 5. d4 cxd4 6. Nxd4 Nf6 7. Be3 b6 8. Bd3 Bb7 9. O-O d6 10. f3 Nbd7 11. Qd2 Be7 12. Rac1 O-O 13. Rfd1 Rac8 14. Bf1 Rfe8 15. b4 Qb8 16. Nb3 d5 17. cxd5 Bxb4 18. dxe6 fxe6 19. Qd4 Bc5 20. Nxc5 bxc5 21. Qd6 Qa8 22. Bc4 Rc6

[Assistant] Qd2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d3 e6 2. Nd2 d5 3. Ngf3 f5 4. g3 Nf6 5. Bg2 Be7 6. O-O O-O 7. e4 c5 8. Re1 Nc6 9. c3 a6 10. e5 Nd7 11. d4 cxd4 12. cxd4 b5 13. h4

[Assistant] Nb6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 b6 2. Nc3 Bb7 3. d4 e6 4. Nf3 Bb4 5. Bd3 Nf6 6. Qe2 d5 7. e5 Ne4 8. O-O Bxc3 9. bxc3 O-O 10. c4 f5 11. Ba3 Rf7 12. cxd5 Bxd5 13. c4 Bb7 14. Bb2 Ng5 15. Nxg5 Qxg5 16. f3 Nc6 17. d5 Nd8 18. Bc1 Qg6 19. Bf4 exd5 20. cxd5 Bxd5 21. Bc4 Bxc4 22. Qxc4 Ne6 23. Bg3 f4 24. Bf2 Rd8 25. Rad1 Rfd7 26. Rxd7 Rxd7 27. Be1 Qf7 28. Qc6 Nd4 29. Qe4 Qc4 30. h3 Ne2+ 31. Kh2 Qxe4 32. fxe4 Re7 33. Rf2 Nd4 34. Bc3 Rxe5 35. Bxd4 Rxe4 36. Bc3 g5 37. h4 c5 38. hxg5 Kf7 39. Kh3 Kg6 40. Kg4 Rc4 41. Be5 f3+ 42. Kxf3 Kf5 43. Bg3 Kxg5 44. Re2 Kg6 45. Kf2 Kf5 46. Bb8 Rc3 47. Bxa7 b5 48. a4 b4 49. a5 b3 50. a6 Rc2

[Assistant] Bxc5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 b6 2. Nf3 Bb7 3. Nc3 Nf6 4. e5 Nd5 5. Nxd5 Bxd5 6. d4 e6 7. Bd3 Bb7 8. c3 d6 9. exd6 cxd6 10. O-O Be7 11. Bf4 Nd7 12. Re1 Nf6 13. Qc2 O-O 14. Bg5 h6

[Assistant] Bh4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/7p/3R4/2p3pk/2P5/2rn3P/6PK/8 w - - 6 43

[Assistant] g4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2q2rk1/1b2bppp/p5n1/1p1N4/2r5/P2QBPN1/1P4PP/2RR3K b - - 0 20

[Assistant] Bxd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r5k1/2p1Q1pp/4p3/pp4rP/5q2/P1P2p2/1P3P2/1K1RR3 w - - 0 27

[Assistant] Rd8+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 4r3/2b2p2/1k6/5QP1/2R2P2/2P1q2p/1P5P/5R1K b - - 0 42

[Assistant] Qf3+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1k4rr/1pp2p2/pq1b4/5Q2/P2N4/5PP1/1PP3KP/R2R4 b - - 2 24

[Assistant] Rxh2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 c6 6. Bd2 Bf5 7. Ne4 Qd8 8. Nxf6+ gxf6 9. g3 Nd7 10. Bg2 Bg4 11. O-O e6 12. Qe2 Bg7 13. Rfe1 O-O 14. c4 Nb6 15. Bc3 f5 16. Rad1 Na4 17. Bb4 c5 18. dxc5 Qc7 19. b3 Nxc5 20. Qe3 Rfc8 21. Nd4

[Assistant] Bxd1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. cxd5 cxd5 5. Nf3 Nc6 6. Bg5 Bg4 7. e3 Bxf3 8. Qxf3 e6 9. Bxf6 gxf6 10. Bb5 Be7 11. Rd1 a6 12. Be2 Qb6 13. Rd2 Qb4 14. O-O Na5 15. Rfd1 Nc4 16. Bxc4 Qxc4 17. Qe2 b5 18. Qxc4 bxc4 19. a3 Kd7 20. Na4 Rhb8 21. Nc5+ Bxc5 22. dxc5 Kc6 23. b4 cxb3 24. Rb2 Rb5 25. Rc1 a5 26. Rcb1 a4 27. Rc1 Raa5 28. Rd1 Rxc5 29. Rdb1 Rc3 30. Kf1 Rac5 31. Ke1 Rc2 32. Kd1 Rxb2

[Assistant] Rxb2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. Nf3 d6 5. exd6 Bxd6 6. e3 Nc6 7. Bd3 Nc5 8. Bc2 Bg4 9. O-O Qf6 10. Nc3 Qh6 11. g3 Qh5 12. Kg2 Ne5 13. Be4 Nxe4

[Assistant] Nxe4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. Nc3 d6 3. d4 Nd7 4. f4 Qc7 5. Nf3 e5 6. d5 g6 7. f5 Bg7 8. Bc4 Ngf6 9. Bd3 Nc5 10. fxg6 hxg6 11. O-O Bg4 12. h3 Bd7 13. Bg5 Nh5 14. g4 Nf4 15. Bxf4 exf4 16. Qd2 Rxh3 17. Kg2 Rg3+ 18. Kf2 Be5 19. Rg1 O-O-O 20. Nxe5 Rxg1 21. Nxd7 Rxa1 22. Nxc5 Qb6 23. b4 dxc5 24. Qxf4 cxb4+ 25. Kf3 bxc3 26. d6 Qc5 27. e5 Qd5+ 28. Be4 Rf1+ 29. Kg3 Rxf4 30. Bxd5 Rxg4+ 31. Kxg4 cxd5 32. Kf4 Rd7 33. Ke3 Kd8 34. Kd4 f6 35. Kxd5 fxe5 36. Kxe5

[Assistant] Rg7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nc3 e6 3. f4 Nc6 4. Nf3 Nf6 5. Bb5 a6 6. Bxc6 dxc6 7. e5 Nd5 8. Ne4 Nxf4 9. O-O Ng6 10. d3 Nxe5 11. Nxe5 Qd4+ 12. Kh1

[Assistant] Qxe5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r5k1/3b1pbp/3P1np1/3N2B1/1pp3P1/7P/1PP2P2/2KRR3 b - - 1 22

[Assistant] Nxd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/1p6/8/2k2p2/1p6/2p1K3/2N3PP/8 b - - 0 41

[Assistant] Kc4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 4Q3/1p3pk1/6p1/p3N2p/3P4/bqP4P/5PPK/8 w - - 8 35

[Assistant] c4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6k1/qr1p1ppp/3Qp3/2P1P3/5P2/1r6/6PP/2RR2K1 w - - 6 35

[Assistant] Ra1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. Nf3 Bd6 7. Bd3 O-O 8. h4 Re8+ 9. Be3 Bg4 10. Bxh7+ Kxh7 11. Ng5+ fxg5 12. hxg5+ Kg8 13. Qxg4 Qa5+ 14. c3 Kf8 15. a3 Qb5 16. Rh8+ Ke7 17. Qe4+ Be5 18. Rxe8+ Kxe8 19. dxe5 Qd5 20. Qxd5 cxd5 21. O-O-O Nc6 22. Rxd5 Rd8 23. Rxd8+ Kxd8 24. f4 a6 25. Kc2 g6 26. Bb6+ Kd7 27. Be3 Ke6 28. g4 Ne7 29. c4

[Assistant] Kd7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. d4 cxd4 3. Nf3 Nf6 4. Nxd4 Nxe4 5. Bc4 Nc6 6. Nxc6 bxc6 7. O-O d5 8. Bb3 Bf5 9. Qf3 Bg6 10. h4 h5 11. Re1 e6 12. Nd2 Nxd2 13. Bxd2 Bd6 14. Bc3 Qxh4 15. g3 Qg4 16. Qxg4 hxg4 17. Bxg7 Rh7 18. Bf6

[Assistant] Be4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5 Nxe4 5. Bd3 Nc5 6. O-O dxe5 7. Bb5+ Bd7 8. Bc4 Bd6 9. Nc3 O-O 10. Bg5 Qc8 11. Re1 Nc6 12. a3 a6 13. b4 Ne6 14. Be3 Kh8 15. Nd5 Re8 16. Ng5

[Assistant] Nxg5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6k1/2Q3pp/p3r3/2pp2r1/4p3/2P1R2P/PP3qP1/3R3K w - - 0 32

[Assistant] Qd8+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. d4 e6 3. f3 d5 4. Nc3 dxe4 5. fxe4 c5 6. d5 exd5 7. Nxd5 Nf6 8. Nxf6+ Qxf6 9. Nf3 Bg4 10. Bg5 Bxf3 11. Bxf6 Bxd1 12. Bb5+ Nc6 13. Bh4 Bxc2 14. O-O Be7 15. Bg3 O-O 16. Rae1 Bf6 17. e5 Bg5 18. e6 fxe6 19. Rxf8+ Rxf8 20. Bc4 Nd4 21. Be5 Bf5 22. Bxd4 cxd4

[Assistant] Bxe6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. g3 d5 3. Bg2 Nf6 4. e5 Nfd7 5. f4 e6 6. Ne2 Be7 7. O-O Nf8 8. h3 Ng6 9. Kh2 h5 10. d4 c5 11. c3 Nc6 12. Be3 c4 13. Nd2 b5 14. Nf3 a5 15. Ng5 Bxg5 16. fxg5

[Assistant] Nce7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2r1r1k1/4Bpbp/1n1N2p1/3R4/1QP3b1/1P4P1/Pq3PBP/4R1K1 b - - 2 23

[Assistant] Nxd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c3 c5 3. Nf3 Nc6 4. g3 Nf6 5. Bg2 e6 6. O-O Be7 7. Nbd2 O-O 8. e3 b6 9. b3 Bb7 10. Bb2

[Assistant] Rc8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d3 f5 2. Bg5 g6 3. e4 Bg7 4. exf5 Bxb2 5. fxg6 hxg6

[Assistant] Nd2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Bb5+ Nbd7 9. e5 O-O 10. Nf3 dxe5 11. fxe5 Ng4 12. Bxd7 Bxd7 13. Bf4 Re8 14. e6 fxe6

[Assistant] O-O


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nc3 a6 3. g3 b5 4. Bg2 Bb7 5. f4 e6 6. d3 b4 7. Nce2 Nf6 8. Nf3 d5 9. e5 Ng8 10. O-O h5 11. h3 Nh6 12. c3 a5 13. d4 Qb6

[Assistant] Nh4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. f4 d6 3. Nf3 Nd7 4. d4 Qc7 5. Nc3 e5 6. Be3 h6 7. fxe5 dxe5 8. d5 Ngf6 9. Be2 Bb4 10. O-O Bxc3 11. bxc3 Nxe4 12. Bd3 Nxc3 13. Qe1 Nxd5 14. Bd2 O-O 15. c4 Nf4 16. Bc2 Ne6 17. Qe4 Nf6 18. Qh4 Nf4 19. Bxf4 exf4 20. Rae1 Bg4 21. Ne5 Qb6+ 22. Kh1 Be6 23. Rxf4 g5 24. Qxh6

[Assistant] gxf4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Bf4 c5 3. c3 cxd4 4. cxd4 d5 5. e3 Nc6 6. Nc3 e6 7. Bd3 Bd6 8. Bxd6 Qxd6 9. f4 O-O 10. Nf3 b6 11. O-O Na5 12. Ne5 Bb7 13. Qf3 Rac8 14. Qh3

[Assistant] Ne4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. exd5 c6 3. Nc3 cxd5 4. d4 Nc6 5. Nf3 Bg4 6. Bd3 e6 7. Be3 Nf6

[Assistant] a3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nc3 d6 2. d4 f5 3. e4 Nf6 4. exf5 Bxf5 5. Bd3 Qc8 6. Nge2 g6 7. Ng3 Bxd3 8. Qxd3 Bg7 9. h4 O-O 10. h5 Qe6+ 11. Be3 Ng4 12. hxg6 hxg6 13. O-O-O Nxe3 14. fxe3 Na6 15. a3

[Assistant] Qg4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d6 2. Nf3 Nf6 3. e3 g6 4. Be2 Bg7 5. O-O O-O 6. h3 c6 7. c4 Nbd7 8. Nc3 Qc7 9. b3 a6 10. Bb2 Rb8 11. Rc1 b6 12. d5 c5 13. a3 Re8 14. Nd2 Nf8 15. Nce4 Nxe4 16. Bxg7 Nxf2 17. Rxf2 Kxg7 18. Qc2 Nd7 19. Qb2+ Nf6 20. Ne4 Qd8 21. Nxf6 exf6 22. Rcf1 Re5 23. Bg4 f5 24. e4 fxg4 25. Rxf7+ Kg8 26. Rf8+ Qxf8 27. Rxf8+ Kxf8 28. Qf2+ Kg7 29. Qh4 Bd7 30. b4 Rbe8 31. bxc5 bxc5 32. Qf2 gxh3 33. Qb2 hxg2 34. Qb7 R8e7

[Assistant] Kxg2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 3r3k/r3NRp1/7p/p7/8/1Bq5/2P1Q1PP/7K b - - 0 31

[Assistant] Qa1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Bf4 g6 7. Nd2 Bg7 8. Ngf3 O-O 9. O-O Bf5 10. Bxf5 gxf5 11. Re1 e6 12. Ne5 Nxe5 13. Bxe5 Ne4 14. Bxg7 Kxg7 15. f3 Nxd2 16. Qxd2 Kh8 17. b3 Rg8 18. c4 Rc8 19. c5 b6 20. b4 bxc5 21. dxc5 Qf6 22. Rac1 Rc7 23. b5 Rgc8 24. Qb4 Qe7 25. Qb2+ Kg8 26. c6 Rb8 27. a4 Qd6 28. Qd4

[Assistant] a6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 e6 2. g3 d5 3. Bg2 Nf6 4. O-O Be7 5. d3 O-O 6. c3 b6 7. Nbd2 a5 8. Qc2 Ba6 9. Re1 c5 10. e4 dxe4 11. Nxe4 Bxd3 12. Nxf6+ Bxf6 13. Qd1 Bg6 14. Qe2 Ra7 15. Ne5 Bxe5

[Assistant] Qxe5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e5 2. Nc3 d6 3. Nf3 Be7 4. d4 exd4 5. Nxd4 Nf6 6. Be3 O-O 7. Bc4 a6 8. a4 Nxe4 9. Nxe4 d5 10. Bd3 dxe4 11. Bxe4 Bf6 12. c3 c6 13. O-O Nd7 14. Qc2 g6 15. Rfd1 Qc7 16. Bh6 Bg7 17. Nf3 Nc5 18. Bxg7 Kxg7 19. Rd2 Bg4 20. Rad1 Rae8 21. Rd4 Nxe4 22. Rxe4 Bxf3 23. gxf3 Rxe4 24. fxe4 Qf4 25. Qd3 Re8 26. Qd4+ f6 27. Re1 Qg4+ 28. Kf1 Re5 29. Qe3 Rh5 30. Qg3 Qe6 31. f3 Rg5 32. Qc7+ Kh6 33. Qf4 Qh3+ 34. Ke2 Qg2+ 35. Kd3

[Assistant] Qxb2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2r3rk/p1q2ppp/3p4/1p3QRn/3P4/5P2/PP3P1P/1K4R1 w - - 0 23

[Assistant] Qxh7+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/2p1P1p1/1k1q4/5R1p/1P5P/2K1R3/p7/8 w - - 0 52

[Assistant] Rb5+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: q5k1/p6p/1p3Bp1/2pn4/6Q1/8/P4PPP/6K1 w - - 0 31

[Assistant] Qe6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 d5 2. d4 c6 3. c4 Bg4 4. Nc3 Bxf3 5. gxf3 e6 6. e3 dxc4 7. Bxc4 Nf6 8. Bd3 Nbd7 9. e4 Nb6 10. Rg1 e5 11. Qe2 exd4 12. Nd1 c5 13. f4 Rc8 14. e5 Nfd5 15. Bd2 Nb4 16. Bb5+ Nc6 17. a3 a6 18. Bd3 Nd5 19. Rc1 Be7 20. Rxg7 h6 21. Rh7

[Assistant] Rxh7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Nf3 e6 3. Bg5 Be7 4. Bxf6 Bxf6 5. e3 c5 6. Bd3 cxd4 7. exd4 b6 8. c3

[Assistant] Bb7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 c5 5. e3 h6 6. Bh4 Qb6 7. Nc4 Qc7 8. c3 d6 9. Bd3 O-O 10. O-O b5 11. Ncd2 a6 12. a4 b4 13. Qe2 Bb7 14. cxb4 cxb4

[Assistant] Rfc1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nc3 Nf6 2. e4 d6 3. d4 g6 4. f3 c6 5. Be3 Nbd7 6. Be2 b5 7. Nh3 Nb6 8. a3 Bxh3 9. gxh3 Qd7 10. Kf2 Qxh3 11. Qf1 Qh4+ 12. Kg1 a6 13. Qf2 Qxf2+ 14. Bxf2 Bg7 15. Kg2 O-O 16. Rhd1 Nbd7 17. b3 Rfe8 18. Bd3 Rac8 19. Ne2 c5 20. c3 cxd4 21. cxd4 Nb6 22. Rdc1 Nfd7 23. b4 Na4 24. Be3 Nab6 25. Kf2 e6 26. Ke1 Kf8 27. Kd2 Ke7 28. Rc2 h6 29. Rac1 Rxc2+ 30. Rxc2 Rc8 31. Rxc8 Nxc8 32. e5 dxe5 33. dxe5 Nxe5 34. Be4 Nc4+ 35. Kd3 Nxe3 36. Kxe3 Nd6 37. Bc6 Nc4+ 38. Kd3 Nxa3 39. Bb7 Nc4 40. Bxa6 Nd6 41. Bxb5 Nxb5 42. Kc4

[Assistant] Nd6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/6r1/R3p2k/1p5p/2p5/2q5/6PP/5QK1 w - - 0 33

[Assistant] Rxe6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 7k/5Bpp/p5r1/1p3p2/5q2/P1N5/1PK2PbP/3Rr3 w - - 0 29

[Assistant] Rd8+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 4r2k/2q1b1pp/p1NpQ1p1/1p1P4/1P3rP1/8/P1P4P/2KR1R2 b - - 5 24

[Assistant] Bg5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. Nf3 c6 3. e3 Nf6 4. Be2 Bf5

[Assistant] O-O


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. d4 d5 3. Bd3 Nc6 4. Ne2 e5 5. exd5 Nxd4 6. Nxd4 exd4 7. c4 dxc3 8. Nxc3 Bd6 9. O-O Ne7 10. Qh5 g6 11. Qh6 Bf5 12. Ne4 Bxe4 13. Bxe4 Qd7 14. Bg5 O-O-O 15. Be3 Kb8

[Assistant] Rfe1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 e6 2. c4 d5 3. Nc3 Nf6 4. Nf3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Be2 b6 8. cxd5 Nxd5 9. Bxe7 Nxe7 10. O-O Bb7 11. e4 c5

[Assistant] d5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 a6 2. e3 h6 3. f4 g6 4. Nf3 Bg7 5. Bd3 e6 6. c4 Ne7 7. Nc3 d6 8. O-O Nd7 9. e4 c5 10. d5 exd5 11. exd5 O-O 12. Qc2 b5 13. b3 b4 14. f5 bxc3 15. fxg6 Nxg6 16. Bxg6 fxg6 17. Qxg6 Qf6 18. Qg3 Ne5 19. Be3 Qg6

[Assistant] Nxe5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Nf6 5. Ng3 Bg4 6. Nf3 Bxf3 7. Qxf3 e6 8. Qd1 Nbd7 9. c3 Be7 10. Bd3 Nb6 11. O-O c5 12. Qc2 cxd4 13. cxd4 Rc8 14. Be3 Nbd5 15. Qd2 Nxe3 16. fxe3 Nd5 17. Rac1 Bf6 18. Kh1 Rxc1 19. Rxc1 O-O 20. Ne4 g6 21. Rf1 Bg7 22. Qe2 Qb6 23. Nc3 Nxc3 24. bxc3 Rc8 25. Rc1 Qa5 26. Qc2 b5 27. Rb1 b4 28. Rxb4 Qxb4 29. cxb4 Rxc2 30. Bxc2 Bf8 31. a3 f5 32. Bb3 Kf7 33. Kg1 Kf6 34. Kf2 e5 35. dxe5+ Kxe5

[Assistant] Kf3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nc3 Nc6 3. Nf3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Nde2 d6 7. g3 Nf6 8. Bg2 O-O 9. O-O Bg4 10. h3 Bxe2 11. Qxe2 Nd4 12. Qd1 Nd7 13. Be3 e5 14. Nd5 Nb6 15. c3 Nxd5 16. exd5 Nf5 17. Bd2 Rc8 18. Rc1 Ne7 19. Qb3 b6 20. c4 f5 21. f4 Kh8 22. Be3 h6 23. Qa3 e4 24. Qxa7 Rc7 25. Qxb6 Qc8 26. b3 Ng8 27. Qxd6 Nf6 28. Qb4 Nh5 29. Kh2 g5 30. Qd2 Rcf7 31. Rfe1 Bf6 32. c5 Rg8 33. d6 Rfg7 34. Bh1 gxf4 35. Bxf4 Nxf4 36. Qxf4 Bg5 37. Qe5 Bxc1 38. Rxc1 f4 39. Qxf4 Kh7 40. Qxe4+

[Assistant] Kh8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 d5 2. g3 c6 3. Bg2 g6 4. O-O Bg7 5. d4 Nf6 6. c4 O-O 7. cxd5 cxd5 8. Bf4 Nc6 9. Nc3 Bf5 10. Ne5 Rc8 11. Rc1 Ne4 12. Nxe4 dxe4 13. Bxe4 Bxe4 14. f3 Bf5 15. e4 Bd7 16. Nxd7 Qxd7 17. d5 Nd4 18. Qd3 e5 19. dxe6 Qxe6 20. Be3 Rcd8 21. Qc4 Qxc4 22. Rxc4 Ne6 23. Rfc1 b6 24. b3 Rd7 25. Rc8 Rfd8 26. Rxd8+ Rxd8 27. Kg2 Bd4 28. Bh6 Bg7 29. Be3 h5 30. f4 Rd3 31. Kf2 Nc5 32. Bxc5 bxc5 33. Ke2 Rd4 34. Rxc5 Rxe4+ 35. Kf3 Rd4 36. Rc8+ Kh7 37. Rc7 Rd2 38. Rxf7 Rxa2 39. h3 Ra3 40. Kg2 Rxb3 41. Rxa7 Kh6 42. g4 Rb2+ 43. Kf3 hxg4+ 44. hxg4 Rb3+ 45. Kg2 Bd4 46. g5+ Kh5 47. Rh7+ Kg4 48. Kf1 Rb2 49. Rf7 Kf3

[Assistant] f5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e3 e6 2. d4 Nf6 3. c4 c5 4. Nf3 d6 5. Nc3 Qa5 6. Bd3 cxd4 7. exd4 Nc6 8. O-O Be7 9. Re1

[Assistant] Qd8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6rr/8/p1kp3P/1p1p4/3Bq3/1PP5/1P1Q2PP/4R1K1 b - - 14 33

[Assistant] Rxg2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. exd5 c6 3. c4 cxd5 4. cxd5 Nf6 5. Nc3 g6 6. Nf3 Bg7 7. d4 O-O 8. Bc4 Nbd7 9. O-O Nb6 10. Bb3 Nfxd5 11. h3 Nxc3 12. bxc3 Bd7 13. Re1 e6 14. Bg5 Qc7 15. Qd2 Rac8 16. Rac1 Ba4 17. Bh6 Bxb3 18. axb3 Nd5

[Assistant] Bxg7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. Nf3 Nbd7 5. g4 d5 6. dxe5 Nxe4 7. Qxd5 Nxc3 8. bxc3 c6 9. Qd4 Bc5 10. Qe4 Qb6 11. Nd4 O-O 12. Bd3 Re8 13. Qxh7+ Kf8

[Assistant] Qh8+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Qc7 9. Bb3 O-O 10. Be3 Nc6 11. O-O b6 12. d5 Na5 13. Qc1 e6 14. c4 exd5 15. cxd5 Ba6 16. Re1 Rad8 17. Bh6 Rfe8 18. Bxg7 Kxg7

[Assistant] Qc3+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d6 2. Nf3 Nf6 3. Bf4 g6 4. e3 Bg7 5. h3 O-O 6. Bh2 Nbd7 7. Be2 c5 8. O-O Qb6 9. b3 a5 10. Nbd2 a4 11. Nc4 Qa7 12. bxa4 Qxa4 13. c3 Qa7

[Assistant] Qb1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 5rk1/p1pp4/1p2p1p1/4P3/3PQ3/7R/P1PBKR2/q5r1 b - - 3 29

[Assistant] Rxf2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/2R4Q/3kr2b/pp1p4/2pP2p1/2P5/PP2n1PK/8 b - - 1 38

[Assistant] Bf4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/8/5pp1/7p/3k1P1P/5KP1/8/8 w - - 4 78

[Assistant] f5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 c5 2. Bg2 g6 3. d3 Bg7 4. Nf3 Nf6 5. O-O O-O 6. c3 Nc6 7. Nbd2 d5 8. e4 Qc7 9. Qc2 Rd8 10. Re1 b6 11. h4 Ba6 12. e5 Ng4 13. e6 fxe6 14. Ng5 Bc8 15. Nxe6 Bxe6 16. Rxe6 Nge5 17. f4 Qd7

[Assistant] Rxe5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 Nh6 2. Nf3 Na6 3. d4 c5 4. Bxa6 Qa5+ 5. Nc3 Qxa6 6. dxc5 e6 7. Qe2 Qxe2+ 8. Kxe2 Bxc5 9. Bxh6 gxh6 10. Rad1 a6 11. e5 Rg8 12. Ne4 Be7 13. g3 b6 14. Nd6+ Bxd6 15. Rxd6 Bb7 16. Rxb6 Bc6 17. Rd1 Ke7 18. Nd4 Bd5 19. b3 Rgb8 20. Rxb8 Rxb8 21. c4 Ba8 22. Ke3 a5 23. Nc2 Rg8 24. Rd6 f6 25. Ra6 fxe5 26. Rxa5 Rf8 27. Ne1 e4 28. Rh5 Rf6 29. a4 Bc6 30. a5

[Assistant] d5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. d4 d5 3. Bd3 Nf6 4. e5 Ne4 5. f3 f5 6. exf6 Nxf6 7. Ne2 Bd6 8. O-O c5 9. Ng3 Nc6 10. c3 cxd4 11. cxd4 Nxd4 12. Bg6+

[Assistant] hxg6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 Bd6 6. Nc3 O-O 7. Bg5 h6 8. Bh4 Re8 9. e3 Bc7 10. Bd3 d6 11. O-O Nbd7 12. Re1 a6 13. a4 Ba5 14. Bc2 b5 15. axb5 axb5 16. Qd3 Bxc3 17. bxc3 Rxa1 18. Rxa1 c4 19. Qd4 Ne5 20. Nxe5 dxe5 21. Bxf6 Qxf6 22. Qa7 Bf5 23. e4 Bg6 24. Qd7 Rd8 25. Qxb5 Rc8 26. Ra6 Qf4 27. Qb1 Qd2 28. Ra3 Bh5 29. f3 Qe3+ 30. Kh1 Bxf3 31. gxf3

[Assistant] Qxf3+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1b1r2k1/p4pP1/2p4R/2p5/2P3P1/7P/PB6/7K b - - 0 33

[Assistant] Rd1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. Nf3 Nf6 3. Bf4 c5 4. e3 Nc6 5. Nbd2 Bf5 6. c4 cxd4 7. cxd5 Nxd5 8. Bb5 dxe3 9. Bxe3 Nxe3 10. fxe3 Qb6 11. Nd4

[Assistant] Bd7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 O-O 6. e3 c5 7. dxc5 Ne4 8. Be5 Nxc3 9. Bxc3 Bxc3+ 10. bxc3 dxc4 11. Qxd8 Rxd8 12. Bxc4 Nc6 13. h3 Bd7 14. Ng5 Be8 15. Ke2 Ne5 16. Bb3 Bb5+ 17. c4 Nxc4 18. Bxc4 Bxc4+ 19. Kf3 Rac8

[Assistant] Rhc1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nf6 5. e5 Nd7 6. Bd3 Nb4 7. Be2 c5 8. c3 Nc6 9. O-O f6 10. exf6 Qxf6 11. Re1 cxd4 12. cxd4 Nxd4 13. Nxd4 Qxd4 14. Bb5 Qb6 15. Qh5+ g6 16. Qxd5 Kf7

[Assistant] Qf3+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r2q1rk1/ppp3pp/5B2/2bp3b/3n4/1B1P1N1P/PPP2PP1/RN1Q1RK1 b - - 0 12

[Assistant] Rxf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: rn1qkbnr/pp3ppp/2p1b3/4N3/2B1P3/2N4P/PPPP2P1/R1BQK2R b KQkq - 2 8

[Assistant] Qh4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Bf5 5. O-O e6 6. c4 Nbd7 7. Nc3 Be7 8. Bf4 O-O 9. Qb3 b6 10. c5 bxc5 11. dxc5 Nxc5 12. Qd1 Nce4 13. Nd4 Nxc3 14. bxc3 Qc8 15. Nxf5 exf5 16. c4 Rd8 17. Qc2 Qe6 18. Rac1 Bd6 19. Bg5 h6 20. Bxf6 Qxf6 21. cxd5 cxd5 22. Rcd1 d4 23. Rd3

[Assistant] Rac8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1r6/p4rk1/1qp2pp1/3b4/5PQp/P1P4P/1P4P1/1BKRR3 b - - 7 28

[Assistant] Qxb2#


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Nc3 e6 3. Bg5 c5 4. d5 d6 5. e4 e5 6. f4 Be7 7. fxe5 dxe5 8. Nf3 Nbd7 9. d6 Bf8 10. Nb5 Qa5+

[Assistant] c3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. b3 d5 2. Nf3 e5 3. g3 e4 4. Ng1 Nf6

[Assistant] Bg2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 b6 5. Nc3 Bb7 6. f3 d6 7. e4 e6 8. Be3 a6 9. Be2 Nbd7 10. O-O

[Assistant] Be7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 c6 5. cxd5 cxd5 6. Bf4 a6 7. e3 Nc6 8. Bd3 Bd6 9. Bxd6 Qxd6 10. O-O O-O 11. a3 b6 12. Rc1 Na5 13. Ne5 Bb7 14. f4 Rac8 15. g4 Nc4 16. Rf3 Ne4 17. Bxc4 dxc4 18. Rh3 Nxc3 19. bxc3 Qd5 20. Qf3 f6 21. Qxd5 Bxd5 22. Nd7 b5 23. Nxf8 Rxf8 24. Rg3 Be4 25. Kf2 Rb8 26. Rgg1 Kf7 27. g5 f5 28. h4 Ke7 29. h5 Kd6 30. g6 h6 31. Rg3 Kd5 32. Rgg1 Kd6 33. Rcd1 Kd5 34. Rd2 Bd3 35. Rb2 Ra8 36. Ra1 Rb8 37. a4 b4 38. Rxb4 Rxb4 39. cxb4

[Assistant] c3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. c3 Bf5 7. Ne2 Qc7 8. Ng3 Bg6 9. h4 h5 10. Be2 Qc8 11. Bxh5 Bxh5 12. Nxh5 Qc7 13. Bf4 Qa5 14. Ng3 Nd7 15. Qb3 O-O-O 16. O-O-O e6 17. Ne4 Nb6 18. c4 f5 19. Ng5 Rd7 20. Be5 Rg8 21. Rhe1 Bh6 22. f4 Bxg5 23. hxg5 Rgd8 24. Kb1 c5 25. Bf6 Rg8 26. dxc5 Qxc5 27. Rxd7 Nxd7 28. Bc3 Nb6 29. Rc1 Kb8 30. Be5+

[Assistant] Kc8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. Nf3 e6 3. Nc3 c5 4. e4 Nf6 5. exd5 Nxd5 6. Nxd5 exd5 7. Bb5+ Bd7 8. Qe2+ Qe7 9. O-O Qxe2 10. Bxe2 Nc6 11. Rfd1 c4 12. b3 cxb3 13. axb3 Bb4 14. c4 O-O 15. Ba3 Bxa3 16. Rxa3 Rfe8 17. Bf1 Bg4

[Assistant] cxd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Nf3 Nf6 5. d4 Nc6 6. Bc4 Bg4 7. Be3 O-O-O 8. h3 Bxf3 9. Qxf3 Nxd4 10. Bxd4 Rxd4 11. Bd3 e6 12. O-O Bd6 13. Ne2 Rh4

[Assistant] a3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c4 Nf6 3. Nc3 e6 4. Nf3 Be7 5. Bf4 O-O 6. Bg3 dxc4 7. e3 b5 8. Nxb5 Bb7 9. Nc3 c6 10. Bxc4 Nbd7 11. Bd3 Nb6 12. e4 Rc8 13. e5 Nfd5 14. Qe2 Nxc3 15. bxc3 Nd5 16. Qe4 g6 17. Rc1 Re8 18. h4 Nxc3 19. Rxc3 Bb4 20. h5 Bxc3+ 21. Ke2 Qa5 22. Rc1 Ba6 23. h6 Bxd3+ 24. Qxd3 Bb4 25. Rc2 Bf8 26. Bh4 c5 27. Bg5 cxd4 28. Rd2 Rc3 29. Qe4 Qb5+ 30. Ke1 Rc1+ 31. Rd1 Qb4+ 32. Bd2 Rxd1+ 33. Kxd1 Qc5 34. Qxd4 Qxd4 35. Nxd4 Rd8 36. Be3 Bc5 37. Ke2 Bxd4 38. Bd2 Bxe5 39. Ba5 Rd5 40. Bd2

[Assistant] Bf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 3r3k/p1p3p1/7p/8/2P5/1q3N2/1B2Q1PP/7K w - - 2 32

[Assistant] Bxg7+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1rq2rk1/4n1bp/3pbpp1/2p1p3/Q3P3/P1BP1NP1/1P3PBP/R4RK1 b - - 2 18

[Assistant] Bb3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2rq4/1b2brk1/p3p3/1p1pP2p/3B4/n1P5/P1QN2PP/1B2R1K1 w - - 0 26

[Assistant] Qh7+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r4rk1/pp3ppp/3b1n2/4p3/2B1R1N1/3P1n1q/PPP2P1P/R1B2Q1K b - - 7 17

[Assistant] Qxf1#


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/pp6/3P4/5k2/5p2/1P1K4/P7/8 b - - 0 49

[Assistant] Ke6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 Bxc3+ 7. bxc3 dxc6 8. Qc2 Qe7 9. g3 Qe4 10. Qxe4+ Nxe4 11. Bg2 Bf5 12. h4 h5 13. O-O O-O-O 14. Bxe4 Bxe4 15. Be3 b6 16. Rfd1

[Assistant] c5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r5k1/p5p1/1pN1R2p/8/6Pq/5Q1n/PP3P2/5K2 b - - 1 31

[Assistant] Rf8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 Nf6 2. Nc3 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. d3 Rb8 8. Rb1 a5 9. a3 e5 10. b4 axb4 11. axb4 Bg4 12. b5 Nd4 13. Nxd4 exd4 14. Nd5 Nxd5 15. Bxd5 Qd7 16. Re1 Rfe8 17. Qc2 c6 18. bxc6 bxc6 19. Bg2 Rxb1 20. Qxb1 Rxe2 21. Qb8+ Bf8 22. Rxe2 Bxe2 23. Bh6 Qe7 24. Bxc6 Bxd3 25. Bg2 Bxc4

[Assistant] Be4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6rk/1p4pp/p4b2/1qQP4/3P4/4B3/P5PP/R5K1 b - - 2 25

[Assistant] Qxc5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Nc3 c5 3. d5 d6 4. e4 g6 5. Nf3 Bg4 6. Be2 Bxf3 7. Bxf3 Bg7 8. O-O O-O 9. Be2 e6 10. Bg5 h6 11. Bxf6 Bxf6 12. dxe6 fxe6 13. Bc4 Qe7 14. Qg4 Kf7 15. Ne2 h5 16. Qg3

[Assistant] g5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. d4 d5 3. c4 dxe4 4. Nc3 Nf6 5. f3 Bf5 6. g4 Bg6 7. g5 Nfd7 8. fxe4 e6 9. Nf3 Bb4 10. h4 Bxc3+ 11. bxc3 Bxe4 12. Bd3 Bxd3 13. Qxd3 Na6 14. Ba3 Qc7 15. O-O O-O-O 16. Kg2 h6 17. g6 fxg6 18. Qxg6 Nf6 19. Ne5 Rdf8 20. Bxf8 Rxf8 21. Rae1 c5 22. Qg3 cxd4 23. cxd4 Nb4 24. a3 Nc2 25. Re2 Nxd4 26. Rd2 Nc6 27. Nxc6 Qxc6+ 28. Qf3 Qxc4 29. Rd3 Kb8 30. Rc3 Qd5 31. Qxd5 exd5 32. Rb3 Re8 33. a4 Re7 34. a5 a6 35. Rfb1 Ne4 36. Rb6 Nc3 37. R1b3 d4 38. Rg6 d3 39. Rxc3 d2

[Assistant] Rd3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c5 2. e3 cxd4 3. exd4 Nf6 4. f4 e6 5. Nf3 d5 6. Bd3 Nc6 7. c3 Ne4 8. O-O f5 9. Ne5 Nxe5 10. fxe5 Be7 11. Nd2 O-O 12. Nxe4 fxe4 13. Be2 Bg5 14. Qc2 Bxc1 15. Raxc1 Bd7 16. Qd2 Qe7 17. Qe3 a6 18. Rxf8+ Rxf8 19. Rf1 Rxf1+ 20. Bxf1 Bb5 21. Bxb5 axb5 22. Qe2 Qd7 23. a3 Qc6 24. Kf2 Qc4 25. Qg4 Kf7 26. Qh5+ Kf8

[Assistant] Qg4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. Nf3 c6 3. Nc3 f5 4. Bg5 Qc7 5. e3 e6 6. Bh4 Nd7 7. Bg3 Bd6 8. Bd3 Ngf6 9. Qe2 O-O 10. O-O Ne4 11. Bxd6 Qxd6 12. Ne1 e5 13. dxe5 Nxe5 14. f3 Nxc3 15. bxc3 Nxd3 16. cxd3 f4 17. e4 Bd7 18. d4 dxe4 19. fxe4 Rae8 20. Nd3 b6 21. e5

[Assistant] Qd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6k1/2b2pp1/2p3Np/2Pp4/P2Pn3/1RB3PP/2q2P1K/4Q3 b - - 0 35

[Assistant] Bxg3+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. a4 a6 2. a5 Nf6 3. g3 e6 4. Bg2 d5 5. Nf3 Be7 6. O-O O-O 7. c4 b6 8. d4 bxa5 9. cxd5 exd5 10. Nbd2 Bb7 11. Nb3 Ne4 12. Nxa5 Bc8 13. Bf4 Bf6 14. Qc2 c6 15. Rfc1 Bd7 16. Nb7

[Assistant] Qe8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/1R6/1p6/8/1kn5/8/1p6/1K6 b - - 3 62

[Assistant] Kc3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e3 d5 2. d4 Nf6 3. f4 g6 4. Bd3 Bg7 5. Ne2 O-O 6. Ng3 b6 7. c3 Bb7 8. Nd2 Nbd7 9. Qe2 c5 10. O-O c4 11. Bc2 a5 12. a3 e6 13. e4 Qc7 14. e5 Ne8 15. Nh1 b5 16. g4 b4 17. axb4 axb4 18. Rxa8 Bxa8 19. Ng3 bxc3 20. bxc3 Qa5 21. Qe3 Nc7 22. Nf3 Nb5 23. Bd2 Na3 24. Bb1 Nxb1 25. Rxb1 Bc6 26. Rf1 Rb8 27. f5 Rb2 28. fxe6 fxe6 29. Ng5 Nf8 30. Qf4 Be8 31. h4 Qa2 32. Rf2 Rb1+ 33. Kg2 Qa1 34. h5 Rg1+ 35. Kh2 Rd1 36. Qe3 Rxd2 37. Qxd2 h6 38. Nh3 g5 39. Ng1 Qb1 40. Nf3 Qd3 41. Qe3 Qxe3 42. Kg2 Qxf2+ 43. Kxf2 Nd7 44. Ne2 Bf7 45. Ke3 Bf8 46. Kd2 Nb6 47. Kc2 Na4 48. Nd2 Ba3 49. Nb1 Be7 50. Nd2 Kf8 51. Nf3 Bg8 52. Nfg1 Bh7+ 53. Kd2 Ba3 54. Nf3 Bb2 55. Ne1 Ke7 56. Nc2 Kd7 57. Ne3 Kc6 58. Nd1 Ba3 59. Ng3 Be7 60. Nf1 Nb6 61. Nfe3 Nd7 62. Nc2 Nf8 63. Nce3 Bd3 64. Nf2 Kb5 65. Nxd3 cxd3 66. Kxd3 Ka4 67. c4 dxc4+ 68. Kxc4 Nd7 69. Nc2 Nb6+ 70. Kd3 Nd5 71. Ne1 Nf4+ 72. Ke4 Kb4 73. Nf3 Kc4 74. Nd2+ Kc3 75. Nf3 Ne2 76. d5 Ng3+ 77. Ke3 exd5 78. e6 Nf1+ 79. Kf2 Nd2

[Assistant] Ne5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: rn2k2r/pp3ppp/2p2n2/2b1p3/2BqP1b1/2NP1N1P/PPP3P1/R1BQK2R b KQkq - 2 9

[Assistant] Qf2#


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. c4 d5 3. cxd5 cxd5 4. e5 Nc6 5. d4 Bf5 6. Nc3 e6 7. Be3 Nge7 8. Bd3 Bxd3 9. Qxd3 Rc8 10. Nge2 Ng6 11. O-O Bb4 12. f4 Nh4 13. g3 Nf5 14. Bf2 h5 15. Kh1

[Assistant] Qb6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 7k/4bpp1/p6p/4Q3/8/1qP1B3/5PPP/5K2 b - - 0 28

[Assistant] Qd1#


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/8/1p6/2p2kpp/1pP4P/1P4K1/P4P2/8 b - - 1 49

[Assistant] Kf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 g6 2. Bg2 Bg7 3. c3 Nf6 4. b3 O-O 5. Bb2 c6 6. d4 d5 7. e3 Nbd7

[Assistant] Ne2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 e5 2. Bg2 Nc6 3. Nf3 Bc5 4. d3 e4 5. dxe4

[Assistant] h5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. e3 c6 6. Nge2 d6

[Assistant] O-O


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1r6/5kbQ/pq2p1p1/1pp5/3n4/2N2R2/PPP2PPP/R5K1 b - - 4 22

[Assistant] Nxf3+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c3 d5 2. d3 c6 3. g3 Bf5 4. Bh3 Bg6 5. Bg4 Nf6 6. Bf3 e6 7. Bg2 Bd6 8. h4 h5 9. Nh3 Ng4 10. Ng5 Qf6 11. Bf4 Bxf4 12. gxf4 Qxf4 13. Nf3 e5 14. Nbd2 e4 15. dxe4 dxe4 16. e3 Qf6 17. Rf1 exf3 18. Nxf3

[Assistant] O-O


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 Nf6 2. g3 d5 3. Bg2 e6 4. b3 c5 5. Bb2 Nc6 6. d4 cxd4 7. Nxd4 Nxd4 8. Qxd4 Be7 9. c4 dxc4 10. Qxc4 O-O 11. O-O a6 12. a4 b5 13. Qf4 Bd6 14. Qh4 Rb8 15. Rd1 Qe7 16. Nc3 Be5 17. axb5 axb5 18. Na4 Bxb2 19. Nxb2

[Assistant] Nd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. Nf3 Nf6 3. Bg5 e6 4. Bxf6 Qxf6 5. e3 Qd8 6. c4 Be7 7. Nc3 c6 8. cxd5 exd5 9. Bd3 Nd7 10. Bc2 Nf8 11. Qd3 Ng6 12. h4 O-O 13. h5

[Assistant] Bf5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 e6 5. Bc4 Nb6 6. Bb3 c4 7. Bc2 g5 8. d4 g4 9. Ng5 Be7 10. Qxg4 Rg8 11. f4 h6 12. Qh5 hxg5 13. O-O

[Assistant] g4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 d5 2. d3 c6 3. Nbd2 Nf6 4. c4 e6 5. b3 Be7 6. Bb2 O-O 7. g3 Nbd7 8. Bg2 a5 9. O-O a4 10. Qc2 axb3 11. axb3 Rxa1 12. Bxa1 b5 13. e4 bxc4 14. bxc4 Qc7 15. cxd5 exd5 16. e5 Ng4 17. d4 Ba6 18. Rc1 Bb5 19. Bf1 Bxf1 20. Kxf1 c5

[Assistant] h3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 Nf6 2. e5 Nd5 3. Nc3 Nxc3 4. bxc3 d5 5. f4 c5 6. d4 c4 7. Nf3 Nc6 8. Be3 Bg4 9. Qd2 Bxf3 10. gxf3 e6 11. Rg1 g6 12. f5 exf5 13. Bg5

[Assistant] Be7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2k3rr/pp3p2/2p1pB1P/4n3/2P5/P4B2/1PQ2PP1/R4R1K b - - 2 22

[Assistant] Rxh6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r1b1k1nN/4p2p/p5p1/1p2q3/4P3/P1NR3P/1PP2PP1/1K5R w q - 3 19

[Assistant] Rd8+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 Nc6 2. d4 e5 3. d5 Nce7 4. Bd3 Ng6 5. Ne2 Nf6 6. Ng3 Bc5 7. O-O Bb6 8. Nc3 d6 9. Be3 h6 10. Bxb6 axb6 11. Nf5 Kf8 12. Qf3 h5 13. h3 Nf4 14. Ne2 g6 15. Nh4 g5 16. Nf5 g4 17. hxg4 hxg4 18. Qg3 Bxf5 19. exf5 N6h5 20. Qe3 Rg8 21. g3 Nh3+ 22. Kg2

[Assistant] Qf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 3k3r/pp4pp/5p2/3b4/3P4/5qP1/PPQb3P/2R1KR2 w - - 0 25

[Assistant] Kxd2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. exf6 gxh4 10. Ne4 Bb4+ 11. Nc3 Qxf6 12. a3

[Assistant] Ba5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 c6 2. d3 d5 3. Nbd2 Nf6 4. e4 dxe4 5. dxe4 Bg4 6. e5 Nd5 7. h3 Bh5 8. Bd3 e6 9. Ne4 Bg6 10. Qe2 Bxe4 11. Bxe4 Nd7 12. O-O Bc5 13. Rfd1 Qb6 14. c4 Ne7

[Assistant] a3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c4 dxc4 3. Nc3 e5 4. e4 exd4 5. Bxc4 Nf6 6. Nf3 Bb4 7. Nxd4 Bxc3+ 8. bxc3 O-O 9. Qb3 Nxe4 10. O-O Nc6 11. Be3 Na5 12. Qa4 Nxc4 13. Qxc4 Nd6 14. Qd3 Qf6 15. Rad1 Rfe8 16. Qd2 Ne4 17. Qd3 Nd6 18. Qd2 Ne4 19. Qd3 Nd6 20. h3 h6 21. Rfe1 Bf5 22. Nxf5 Qxf5 23. Qxf5 Nxf5 24. Rd7 Nxe3 25. fxe3 Rac8 26. Kf2 Kf8 27. Rb1 b6 28. c4 Red8 29. Rd4 Rxd4 30. exd4 Rd8 31. Ke3 Re8+ 32. Kd3 Rd8 33. a4 Ke7 34. a5 Kd6 35. axb6 axb6 36. Rf1 f6 37. g4 Ra8 38. Re1 Ra3+ 39. Kc2 Rxh3 40. Re7 Rg3 41. Re8

[Assistant] Rxg4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/8/p4ppp/1p4P1/1Pk2P1P/P3K3/8/8 b - - 0 46

[Assistant] fxg5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/4k3/3p4/3Pp3/b1B1Pp1p/P2K1PpP/6P1/8 b - - 5 43

[Assistant] Bd1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. Nf3 d5 3. Nc3 Bg4 4. h3 Bxf3 5. Qxf3 e6 6. d4 Nf6 7. Bg5 Be7 8. O-O-O Nbd7 9. e5

[Assistant] Ng8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e5 2. Nc3 d6 3. Nf3 Be7 4. d4 exd4 5. Nxd4 Nf6 6. Nf3 O-O 7. e5 dxe5 8. Qxd8 Bxd8 9. Nxe5 Re8 10. f4 Nc6 11. Bd3 Nxe5 12. fxe5 Rxe5+ 13. Kf2 Ng4+ 14. Kg3 Be7 15. h3 Nf6 16. Bf4 Rc5 17. Bd2 Bd6+ 18. Kf2 Be6 19. Rae1 Ra5 20. a3 Rd8 21. Ne4 Nxe4+ 22. Bxe4 Bc5+ 23. Kg3 Rxd2 24. Bd3 Bd6+ 25. Kf3 Bd5+ 26. Ke3 Rxg2 27. Kd4 Be6 28. Kc3 Be5+ 29. Kb4 b6 30. c4 c5+ 31. Kb3 b5 32. Rxe5 bxc4+ 33. Bxc4 Bxc4+ 34. Kxc4 Kf8 35. Rhe1 g6 36. Rxc5 Rxc5+ 37. Kxc5 Rxb2 38. Ra1 Rb7 39. a4 Kg7 40. a5 Re7 41. a6 h5 42. Rb1 Re6 43. Kb5 Rb6+ 44. Kc5 Rxb1 45. Kd4 Ra1 46. Ke5 Rxa6 47. Kf4 Rb6 48. Kg5 a5 49. Kh4

[Assistant] a4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6k1/pb3ppp/1p6/3rRp2/2p4N/P7/1P3PPP/3R2K1 b - - 0 20

[Assistant] Rxd1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c5 2. c3 e6 3. Nf3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. Nbd2 a6 8. Re1 Qc7 9. e4 d6 10. Nb3 Nbd7 11. Bf4 Nh5 12. Be3 O-O 13. Rc1 Rac8 14. Qd2 Qb8 15. Bg5 Nhf6 16. e5 dxe5 17. dxe5 Nd5 18. Bxe7 Nxe7 19. Qxd7 Nf5 20. Qd2 Rfd8 21. Qe2 b5 22. Nbd2 Bd5 23. Nf1 Bxa2 24. Rb1 Bc4 25. Qe4 Bd3 26. Qg4 Nh6 27. Qg5 Bxb1 28. Rxb1 Rd3 29. Ne3 Rcd8 30. h4 R8d7 31. Ne1 Rd2 32. h5 Qd8 33. Bc6 Qxg5 34. Bxd7 Rxd7 35. Nf3 Qxh5 36. Kg2 Nf5 37. Rh1 Nxe3+ 38. fxe3 Qg6 39. Kf2 Qe4 40. Re1 h6 41. Re2 c4 42. Nh4 g5 43. Nf3 a5 44. Nd4 Rxd4 45. exd4 Qf5+ 46. Kg2 b4 47. Rf2 Qd3 48. Rf3 Qe4

[Assistant] Kg1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Nf6 5. Be3 Bd6 6. c4 dxc4 7. Bxc4 O-O 8. O-O c6 9. Qb3 Bg4 10. Ng5 Na6 11. Nxf7 Qc7 12. Nxd6+ Kh8 13. Nf5 Bxf5 14. Bd3 Bxd3 15. Qxd3 Rad8 16. Qf5 Rd5 17. Qh3 Qe7 18. Nc3 Rh5 19. Qg3 h6 20. h3 Ne4 21. Qh2 Nxc3 22. bxc3 Rxf2 23. Bxf2 Rg5 24. Rae1 Kh7 25. Rxe7 Rg6 26. Rxg7+ Rxg7 27. Be3 Kg8 28. Rf3 Rg6 29. Rg3 Rg7 30. Rxg7+ Kxg7 31. Qf4 Kg6 32. Qxh6+ Kf7 33. c4 Ke7 34. c5 Nb4 35. Qh7+ Ke6 36. Qxb7 Kd5 37. Qxb4 Ke4 38. Qa5

[Assistant] Kxe3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 e5 2. Nc3 Nc6 3. e4 f5

[Assistant] d3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Bf4 e6 3. e3 Be7 4. Nf3 O-O 5. h3 Nd5 6. Bh2 c5 7. c3 Qb6 8. Qb3

[Assistant] Nc6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c5 2. d5 e5 3. c4 d6 4. Nc3 a6 5. e4 f5 6. Bd3 Nf6 7. Nge2 fxe4 8. Nxe4 Nxe4 9. Bxe4 Nd7 10. Ng3 Nf6 11. O-O g6 12. f4 exf4 13. Bxf4 Bg7 14. Bg5 O-O 15. Bd3 Qc7 16. Qd2 Ng4 17. Rxf8+ Bxf8 18. h3 Ne5 19. Rf1 Bg7 20. Bf6 Bxf6 21. Rxf6 Nxd3 22. Qxd3 Qe7 23. Rxg6+ hxg6 24. Qxg6+ Kf8 25. Nh5 Qe1+ 26. Kh2 Qe5+ 27. Kh1 Bf5 28. Qh6+ Ke7 29. Qg5+ Kd7 30. Ng7 Bxh3 31. gxh3

[Assistant] Qxg5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6k1/5ppp/1pN3n1/1P1P4/2N3Q1/1P4bP/5q2/7K w - - 0 39

[Assistant] Qc8+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 a6 5. Nbd2 Be7 6. Bd3 O-O 7. O-O c5 8. dxc5 Nc6 9. a3 e5 10. cxd5 Qxd5 11. Bc4 Qxc5 12. b4 Qd6 13. Qc2 b5 14. Be2 Bg4 15. Rd1 Rac8

[Assistant] Ne4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 e6 2. Bg2 d5 3. d3 c6 4. Nf3 Nf6 5. O-O g6 6. c4 Bg7

[Assistant] Qc2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Ne2 d5 7. O-O dxc4

[Assistant] Bxc4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2r5/1p4k1/p5p1/P2PK1p1/8/1PN3P1/2P5/8 w - - 1 39

[Assistant] d6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 Nf6 2. g3 g6 3. d3 Bg7 4. Bg2 O-O 5. O-O c6 6. c4 d5 7. cxd5 cxd5 8. Be3 Nc6 9. Qb3 d4 10. Bf4 Nd5 11. Bg5 h6 12. Bd2 Be6 13. Qd1 Rc8 14. Na3 Ncb4 15. Bxb4 Nxb4 16. Qd2 Qb6 17. Rfc1 Nxa2 18. Rxc8 Rxc8 19. Nc4 Bxc4 20. dxc4

[Assistant] Nb4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r3kb1r/2qn2p1/p1n1p2p/1pp3B1/3pP3/7P/PPP1B1PN/R2Q1RK1 w kq - 0 17

[Assistant] Bh5+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 e6 2. Nf3 Nf6 3. c3 d5 4. Bg5 Nbd7 5. Bxf6 Qxf6 6. e3 Bd6 7. Nbd2 e5 8. Bd3 e4 9. Be2 exf3 10. Bxf3 c6 11. Qb3 O-O 12. O-O Re8 13. e4 dxe4 14. Nxe4 Rxe4 15. Bxe4 Qh4 16. Bxh7+ Kxh7 17. g3

[Assistant] Qh3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 e5 2. g3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. O-O Be7 8. a3 O-O 9. b4 Re8 10. Rb1 Bf8 11. d3 a5 12. b5 Nd4 13. Nd2 a4 14. e3 Nf5 15. Qc2 Nd6 16. Rd1 Bf5 17. Nde4 Nxe4 18. Nxe4 Ra7 19. Bb2 Be6 20. Nc5 Bd5 21. d4 Bxg2 22. Kxg2 Qd5+ 23. Kg1 Qc4 24. Qxc4 Nxc4 25. Bc1 exd4 26. Rxd4 Nxe3 27. Nxa4 Nf5 28. Rc4 Nd6 29. Rd4 Re1+ 30. Kg2 Nxb5 31. Rd8 Rxa4 32. Rxb5 Rxc1 33. Rxb7 Rxa3 34. Rbb8 g6 35. Rxf8+ Kg7 36. Rfc8 Ra2 37. Rb4 Rcc2 38. Rf4 Ra5 39. h4 Rf5 40. Rxf5 gxf5 41. Kf3 Kf6

[Assistant] Rh8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 4. Nc3 Be7 5. O-O O-O 6. d4 exd4 7. Nxd4 d6 8. Be3 Re8 9. f3 Bf8 10. Qd2 a6 11. Rad1 g6 12. Rfe1 Bg7 13. a3 Nxd4 14. Bxd4 Qe7 15. Kh1 Be6 16. Bf1 Nd7 17. Be3 Ne5 18. b3 Rad8 19. a4 h5 20. Nd5 Bxd5 21. exd5 Qd7 22. Bg5 Rb8

[Assistant] c4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nc3 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. g3 Qb6 6. Nxc6 bxc6 7. Bg2 g6 8. O-O Bg7 9. e4 O-O 10. h3 d6 11. Rb1 Be6 12. Be3 Qa5 13. a3 Rfb8 14. Ne2 Bc4 15. Re1 Ba2 16. Bd2 Qa6 17. Bf1 Qc8 18. Ra1 Rxb2 19. Bc3 Rab8 20. Bxb2 Rxb2 21. Qc1 Qb7 22. Nc3 Be6

[Assistant] Rb1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. Nf3 c5 3. Bg5 h6 4. Bf4 cxd4 5. Qxd4 Nc6 6. Qa4 Nf6 7. e3 Bd7 8. Bb5 a6 9. Bxc6 Bxc6 10. Qb3 e6 11. c3 Qd7 12. Nbd2 Bd6 13. Bg3 Ba4 14. Qb6 Qe7 15. Bxd6 Qd7 16. Qc7 Qxc7 17. Bxc7 O-O 18. Bg3 Rfe8 19. O-O Nd7 20. Rfd1 Bxd1 21. Rxd1 Nf6 22. Nb3 Rac8 23. Nbd4 Nd7 24. Nb3 Nf6 25. Nbd4 b6 26. Nb3 Nd7 27. Nfd4 Nf6 28. Nf3 Ne4 29. Bf4 h5 30. Be5 f6 31. Bg3 e5 32. Rxd5 g5 33. Kf1 Red8 34. Rxd8+ Rxd8 35. Ke2 a5 36. h4 g4 37. Nfd2 Nxd2 38. Nxd2 a4 39. a3 b5 40. f3 Kf7 41. Bf2 Ke6 42. e4 f5 43. exf5+ Kxf5 44. fxg4+

[Assistant] Kxg4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 5k2/2rR1pp1/5b1p/1P5P/PKB5/4r3/8/3R4 b - - 1 36

[Assistant] Bc3+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. c4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2 Nf6 6. Nge2 d6 7. d3 e6 8. Bg5 O-O 9. Qd2 b6 10. e5 dxe5

[Assistant] Bxc6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 e5 2. g3 e4 3. Ng1 Nf6 4. Bg2 d5 5. c4 c6 6. cxd5 cxd5 7. d3 Nc6

[Assistant] dxe4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. e5 Bf5 3. c3 e6 4. Nf3 c5 5. Be2 Nc6 6. O-O d4 7. cxd4 cxd4 8. Bb5 Rc8 9. d3 Bc5 10. Nbd2 Ne7 11. a3 O-O 12. b4 Bb6 13. Nc4 Bc7 14. Bb2 a6 15. Bxc6 Nxc6 16. Rc1 b5 17. Nd6 Nxe5 18. Nxf5 exf5 19. Nxd4 Qd7 20. Nb3 Nxd3 21. Nc5 Nxc5 22. Rxc5 Qe6 23. Qc2 Bd6 24. Qc3 Qh6 25. g3 Bxc5 26. bxc5 Rc6 27. Rc1 Rfc8 28. Qe5 Qf6 29. Qxf6 gxf6 30. Bd4 Kg7 31. Kg2 Kg6 32. Kf3 Rd8 33. Be3 Rd3 34. Ra1 Rc3 35. Kg2 f4 36. gxf4 Kf5 37. h3 h5 38. Bd4 Rc4 39. Be3 Ra4 40. Rd1 Rxa3 41. Rd5+ Ke6 42. Rxh5 b4 43. f5+ Kd5 44. Rh8 b3 45. Rb8 Kc4 46. h4 Ra4 47. h5 Rb4 48. Rxb4+ Kxb4 49. Bd4 Kc4 50. Bb2 Kxc5 51. h6 Rc8 52. Bxf6 a5 53. h7 a4 54. h8=Q Rxh8 55. Bxh8 a3 56. Kf3 b2 57. Bd4+ Kxd4 58. Kg4 Ke5 59. Kg5 b1=Q 60. f4+ Ke4 61. Kf6 Kxf4 62. Kg7 Qxf5 63. Kg8 a2 64. Kf8 a1=Q 65. Kg8 f6 66. Kf8 Qe6

[Assistant] Kg7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6k1/5ppp/2Bpb3/2n1p3/1R2P3/4N3/5rPP/5K2 w - - 0 36

[Assistant] Kg1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 e5 2. c3 Nc6 3. e4 d6 4. d5 Nce7 5. Bd3 f5 6. f4 fxe4 7. Bxe4 Nf6 8. Bc2 e4 9. Ne2 Nexd5 10. O-O c6 11. f5

[Assistant] Qb6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 e5 2. Nf3 e4 3. Bg5 f6 4. Bh4 exf3 5. exf3 d5 6. Bd3 Be7 7. O-O Nc6 8. c3 g5 9. Bg3 h5 10. h3 h4 11. Bh2 Be6 12. Re1 Qd7 13. Qe2 Bf7 14. Bb5 O-O-O 15. Nd2 Re8 16. Nb3 Bd6 17. Qd2 Bxh2+ 18. Kxh2 a6 19. Bd3 Be6 20. Nc5 Qd6+ 21. Kg1 Kb8 22. Re2 Nh6 23. Rae1 Bf7 24. b4 Rxe2 25. Bxe2 Re8 26. Rb1 Nf5 27. b5 axb5 28. Bxb5

[Assistant] b6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 e5 2. e3 exd4 3. e4 Nf6 4. f3 d5 5. Bd3 dxe4 6. Ne2 exd3 7. Qxd3 Nc6 8. O-O Bd6 9. Qd1 O-O 10. Nd2 d3 11. Nb3 dxe2 12. Qxe2 Re8 13. Qd1 Qe7 14. Bd2 Bc5+ 15. Kh1 Bb6 16. Bc3 Qe2 17. Bxf6 Qxd1 18. Raxd1 gxf6 19. Rd3

[Assistant] Be6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 4r1k1/2R2p2/1p3nr1/pNpP1qp1/P1P2p2/6P1/4QPK1/7R w - - 4 40

[Assistant] Nd6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d6 2. Nc3 c6 3. Nf3 e6 4. d4 d5

[Assistant] e5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r5k1/4pp1p/6p1/2pPp2n/4P3/1PNQ1K2/2PB1R1q/8 b - - 1 27

[Assistant] Qh3+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 d5 2. Bg2 e6 3. c4 Nf6 4. Nf3 Be7 5. O-O O-O 6. cxd5 exd5 7. Nc3 b6 8. d3 Bb7 9. Nd4 Nbd7 10. Nf5 c5 11. Bf4 g6 12. Nxe7+ Qxe7 13. Qb3 d4 14. Bxb7 Rab8 15. Bg2 dxc3 16. Rfe1 cxb2 17. Qxb2 Rbc8 18. a4 Nd5 19. Bd2

[Assistant] Rfe8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c5 2. Nc3 cxd4 3. Qxd4 Nc6 4. Qd1 d6 5. Nf3 Nf6 6. e4 g6 7. Bb5 Bg7 8. Bxc6+ bxc6 9. Bg5 h6 10. Bf4 e5 11. Be3 a5 12. Qd2

[Assistant] Ba6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. Qd2 O-O 9. f4 Ng4 10. Bxg4 Bxg4 11. O-O Rc8 12. h3 Bd7 13. f5 Ne5 14. b3 Qa5 15. Nd5 Qxd2 16. Nxe7+ Kh8 17. Bxd2 Rce8 18. Nd5 Nc6 19. f6 Nxd4 20. fxg7+ Kxg7 21. Bc3 Bc6 22. Bxd4+ Kh6 23. Rae1 f5 24. c4 Bxd5 25. exd5 f4 26. Rxe8 Rxe8 27. Rxf4 g5 28. Rf1 Re4 29. Bf2 Kg6 30. Re1 Kf5 31. Rxe4 Kxe4 32. Bxa7 b5 33. Bb8 bxc4 34. bxc4 Kd4 35. Bxd6 Kxc4 36. Be7 Kxd5 37. Bxg5 Ke5 38. h4 Kf5 39. Kh2 Kg4 40. a4 Kf5 41. a5 Ke6 42. a6 Kf5 43. a7 Kg4

[Assistant] a8=Q


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r2qk2r/pp3ppp/3p4/2pb4/3nP3/2PQ4/PP4PP/R3KB1R w KQkq - 0 14

[Assistant] exd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Bd3 Ngf6 6. Nf3 Nxe4 7. Bxe4 Nf6 8. Bd3 Bg4 9. c3 Qd5 10. Be2 e6 11. O-O Be7 12. Ne5 Bxe2 13. Qxe2 O-O 14. Rd1 Qd8 15. b3 Nd7 16. Nc4 Nb6 17. Na5 Qd7 18. c4 Bb4 19. Bd2 Bxa5 20. Bxa5 Nc8 21. Qe5 Ne7 22. Bb4 Ng6 23. Qg3 Rfd8 24. h4 Ne7 25. Bc3 Nf5 26. Qg4 Qe7 27. h5 Qh4 28. Qxh4 Nxh4 29. g4 Rd7 30. Rd3 g5 31. Rad1 h6 32. d5 cxd5 33. cxd5 exd5 34. Rxd5 Rxd5 35. Rxd5 Rc8 36. Bb2 f5 37. gxf5 Rc2 38. Bf6 Kf7 39. Bd8 Rxa2 40. f6

[Assistant] Ra1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r4rk1/ppp3pp/4p3/1P1qNp2/P2P1N2/b3P3/3Q1P1P/1K1R3R b - - 5 20

[Assistant] Qb3+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 e6 2. e3 d5 3. a3 dxc4 4. Qc2 Nf6 5. Bxc4 Be7 6. Nf3 Kf8 7. h4 Kg8 8. Ng5 h6 9. Nf3 c6 10. Nc3 b5 11. Be2 a5 12. Ne4 Nxe4 13. Qxe4 Bb7 14. Qc2 Nd7 15. d4 Ne5 16. Bd2 Nxf3+ 17. gxf3 Rc8 18. e4 c5 19. d5 exd5 20. exd5 Qxd5 21. Rd1 Qe6 22. Rg1 Bxf3 23. Be3 Bxe2 24. Qxe2 c4 25. Qg4 Qxg4 26. Rxg4 Bf6 27. Ke2 Kh7 28. b4 Rhe8 29. bxa5 Bb2 30. a4 c3 31. axb5 c2 32. Rc1 Bxc1 33. Kf3 Bxe3 34. Rg1 c1=Q 35. Rxc1 Bxc1 36. Kg2 Rc5 37. Kf3 Rxb5 38. a6 Ra5 39. a7 Rxa7 40. Kg2 Ra3 41. h5 Ra5 42. Kf3 Rxh5 43. Kg2 Rf5 44. Kf1 Rxf2+ 45. Kxf2 Re6 46. Kf3 Rg6 47. Kf2 h5 48. Kf3 h4 49. Kf2 h3 50. Kf3 h2 51. Ke4 h1=Q+ 52. Kd4 Qh5

[Assistant] Kc3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Qxd4 Nf6 5. e5 Nc6 6. Qf4

[Assistant] Nd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. d5 Be7 5. e4 a5 6. Bd3 Na6 7. Nge2 O-O 8. O-O Nh5 9. f3 Bg5 10. b3 h6 11. a3 Nc5 12. Bc2 Bd7 13. Rb1 g6 14. b4 Na6 15. Qd3 axb4 16. axb4 Bxc1 17. Rfxc1 Qg5 18. Rd1 f5 19. exf5 gxf5 20. Rf1 Qg7 21. Kh1 Rae8

[Assistant] f4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: Q7/p5pk/6q1/2B3r1/1P3P2/6pK/P1P1R3/R7 b - - 0 36

[Assistant] Qh5+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r1bqk1nr/1p1pppbp/p1n3p1/3N4/3pP3/B4N2/PPP2PPP/R2QKB1R w KQkq - 0 9

[Assistant] Bc5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 d5 2. Bg2 c6 3. Nf3 g6 4. O-O Bg7 5. c3 Nf6 6. d4 O-O 7. Ne5 a5 8. Nd2 Nbd7 9. Nxd7 Bxd7 10. e4 Bc8 11. e5 Ne8 12. f4 f5 13. c4 e6 14. b3 b5 15. cxd5 cxd5 16. Bb2 Rf7 17. Rc1 Raa7 18. Rf3 b4 19. Nf1 Rfc7 20. Rf2 Rxc1 21. Qxc1 Rc7 22. Rc2 Bf8 23. Ne3 Rxc2 24. Qxc2 Qc7 25. Qxc7 Nxc7 26. Bf1 Ba6 27. g4 Bxf1 28. Kxf1 Kf7 29. g5 Ke8 30. h4 Kd7 31. Ke2 Nb5 32. Kd3 Be7 33. Nf1 Bd8 34. Ng3 Bb6 35. h5 Na7 36. h6 Nc6 37. Nh5 gxh5 38. g6 Ne7 39. gxh7 Ng6 40. Ke3 Ke7 41. Kf3 Kf7 42. Kg3 Bd8 43. Kh3 Nh8 44. a3 Kg6 45. axb4 axb4 46. Bc1 Be7

[Assistant] Bd2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r1b3k1/ppp3p1/7p/5B2/3p1Pn1/3P4/PPPB2Pq/R2QRK2 b - - 2 23

[Assistant] Qh1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Bf4 b6 3. e3 Bb7 4. Nf3 g6 5. Nc3 Bg7 6. Be2 O-O 7. Qd2 d6 8. h4 h5 9. O-O-O Nbd7 10. Ng5 e5 11. Bg3 Qe7 12. Rhg1 Rfe8 13. Bf3 e4 14. Be2 a6 15. Bc4

[Assistant] d5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. a4

[Assistant] b4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 a6 3. c3 e6 4. Bd3 d5 5. e5 f5 6. exf6 Nxf6 7. Bc2 Bd6 8. O-O O-O 9. d4 Nc6 10. Bg5 Qe8 11. Nbd2 Qh5 12. Bh4 Bd7 13. Bg3 Bxg3 14. hxg3 cxd4 15. Nxd4 Qxd1 16. Raxd1 Nxd4 17. cxd4 Rac8 18. Bd3 Bb5 19. Bxb5 axb5 20. Rc1 Kf7 21. f3 Ke7 22. a3 Kd6 23. g4 Nd7 24. Kf2 Nb6 25. Ke3

[Assistant] Nc4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. d4 b6 3. Nf3 Bb7 4. Bd3 Ne7 5. O-O h6 6. Nc3 g6 7. Bf4 Bg7 8. d5 exd5 9. Nxd5 Nxd5 10. exd5 O-O 11. c4

[Assistant] c6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2N3k1/1p3p1p/5br1/p1p1p3/P1P1Pn1q/1P3QP1/2B2P2/3R1RK1 b - - 0 25

[Assistant] Qh3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. d3 d5 3. Nd2 c5 4. Ngf3 Nc6 5. g3 Nge7 6. Bg2 Ng6 7. O-O

[Assistant] Bd6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 d5 2. Bg2 e6 3. e4 Nf6 4. exd5 Nxd5 5. Ne2 Be7 6. O-O O-O 7. d4 Nf6 8. c4 c5 9. d5 exd5 10. cxd5 Bd6 11. Nbc3 h6 12. Bf4

[Assistant] Re8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e5 2. Nf3 d5 3. Nxe5 Bd6 4. d4 dxe4 5. Nc3 Nf6 6. Bc4 O-O 7. Bg5 Nc6 8. Nxc6 bxc6 9. O-O Bf5 10. Re1 Re8 11. Qd2 h6 12. Bh4 g5 13. Bg3 Bxg3 14. hxg3 Nd5 15. a3 Rb8 16. b4 Bg6 17. Rad1 f5 18. Bb3 Kh7 19. Na4 Rf8 20. c4 Nf6 21. Nc5 Qe7 22. Bc2 Rbd8 23. Qc3 Ng4 24. f3 Nf6 25. fxe4 fxe4 26. Qe3 Rde8 27. Rd2 Ng4 28. Qe2 Rf2 29. Qd1 e3 30. Bxg6+ Kxg6 31. Qxg4 Rxd2 32. d5 e2 33. Ne6 cxd5 34. cxd5 Qf6 35. Qe4+ Kf7 36. Rxe2 Rxe2 37. Qxe2 c6 38. Qh5+ Qg6 39. Qf3+

[Assistant] Kg8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 5r1k/r5p1/3p1pQR/p1nPp3/1p2P3/1P2PR2/P1B1q1PP/6K1 b - - 0 28

[Assistant] gxh6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c5 2. Nf3 cxd4 3. e3 Nf6 4. exd4 Nc6 5. c4 d5 6. cxd5 Nxd5 7. Nc3 Nxc3 8. bxc3 g6 9. Bc4 Bg7 10. O-O O-O 11. Bg5 Bd7 12. Re1 Rc8 13. Qd2 Re8 14. Bb3 Na5 15. Bc2 Nc4 16. Qe2 Qc7 17. Bb3 Be6 18. Rad1 b5 19. d5 Bg4

[Assistant] h3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c6 2. g3 Nf6

[Assistant] Bg2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c4 Bf5 3. cxd5 Bxb1 4. Rxb1 Qxd5 5. b3 Nc6 6. e3 O-O-O 7. Nf3 e5 8. Bc4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 Qe4 11. Bd3 Qg4 12. O-O e4 13. h3 Qf5 14. Nh4 Qf6 15. Bxe4 Qxh4 16. Bxc6 bxc6 17. Qa5 Ne7 18. Qxa7 Qf6 19. b4 Kd7 20. b5 Ra8 21. Qc5 Qd6 22. Qg5 f6 23. Qxg7 Rag8 24. Qf7 Qd5 25. Qxd5+ cxd5 26. a4 Ra8 27. Ra1 Ra5 28. Ra3 Rha8 29. Rfa1 Nc8 30. f3 Nb6 31. e4 Rxa4 32. Rxa4 Rxa4 33. Rd1 Kd6 34. Kf2 Ra2+ 35. Kg3 Nc4 36. Kf4 Rxg2 37. Ra1 Rf2 38. Ra6+ Kd7 39. e5 Nd2 40. Ke3 Rxf3+ 41. Kxd2 Rf5 42. Rxf6 Rxf6 43. exf6 Ke6 44. Ke3 Kxf6 45. Kf4

[Assistant] h6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/pp6/5N2/4k3/5p2/1PPKbP2/8/8 w - - 11 47

[Assistant] Ng4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 b6 2. Bg2 c6 3. e4 Bb7 4. Nc3 e5 5. Nge2 Bc5 6. d4 exd4 7. Nxd4 Qf6 8. Nf5 g6 9. Ne3 Ne7 10. O-O O-O 11. a3 a5 12. Ng4 Qg7 13. Bh6 Qh8 14. e5 Nf5 15. Nf6+ Qxf6 16. exf6 Nxh6 17. Ne4

[Assistant] Na6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. Be3

[Assistant] Bxe3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Be7 8. Bc4 Be6 9. Bxe6 fxe6 10. O-O O-O 11. Na4 b5 12. Nb6 Ra7 13. Nd5 Rb7 14. Nxf6+ Bxf6 15. Qd3 Nc6 16. Rfd1 Rd7 17. a4 Qb8 18. axb5 Qxb5 19. Qxb5 axb5 20. c3 b4 21. Ra6 Rc8 22. cxb4 Be7 23. b5 Nb8 24. Ra8 Rb7 25. b6 Rc2 26. b3 Rb2 27. Nd2 Kf7 28. h3 d5 29. f3 Nd7 30. exd5 exd5 31. Ra7 Nc5 32. Rxb7 Nxb7

[Assistant] Bf2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/6pn/8/5PPP/4k3/3p4/3K4/8 w - - 1 58

[Assistant] f6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e5 2. f4 Nc6

[Assistant] Nf3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 g6 2. Nc3 Bg7 3. g3 d6 4. Bg2 c6 5. Nge2 Nf6 6. O-O O-O 7. h3 Nfd7 8. d3 Na6 9. Kh2 Nc7 10. f4 e5 11. f5 d5 12. g4 dxe4 13. Nxe4 Nf6 14. N2g3

[Assistant] Nxe4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. b3 e5 2. Bb2 Nc6 3. d4 Bd6 4. Nf3 e4 5. Nfd2 f5 6. e3 Nf6 7. Nc3 O-O 8. Nc4 Bb4 9. a3 Ba5 10. Nxa5 Nxa5 11. Qd2 d5 12. O-O-O Nc6 13. Kb1 a5 14. f3 a4 15. b4 Na7 16. fxe4 fxe4 17. g4 Bxg4 18. Be2 Bxe2 19. Nxe2 c6 20. Rhg1 Nb5 21. Nf4 Nd6 22. Rg2 Qe7 23. Rdg1 Rf7 24. Qf2 Nc4 25. Bc3 b6 26. Qh4

[Assistant] c5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c4 Bf5 3. Nc3 e6 4. e3 Nc6

[Assistant] a3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 4br1k/1p4rp/2p1p3/2PpNp2/P2P1q2/1R3B1R/5Q2/5K2 b - - 3 38

[Assistant] Qc1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 f5 2. e3 Nf6 3. Nf3 g6 4. Bd3 Bg7 5. Nbd2 d6 6. c4

[Assistant] O-O


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/p4r1k/1p2Q2p/3p4/3Ppq1p/2P3R1/PP4PK/8 w - - 0 34

[Assistant] Qg6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d3 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Nbd7 5. O-O c6 6. c4 Bd6 7. cxd5 exd5 8. b3 O-O 9. Bb2 Rfe8 10. Nc3 Ne5 11. Nd2 Qc7 12. Rfe1 Bg4 13. Qc2 Bh5 14. e4 d4 15. Ne2

[Assistant] Bxe2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/6p1/8/2K5/8/2N1pk2/8/8 b - - 1 59

[Assistant] e2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 4rr1k/pppb1p1p/3p1Pp1/4q3/2P5/2PB2R1/P2Q2PP/5RK1 w - - 3 21

[Assistant] Qh6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c6 2. Nf3 d5 3. c4 Nf6 4. cxd5 cxd5 5. e3 e6 6. Be2 Be7 7. O-O O-O 8. Nbd2 Nc6 9. Nb3 a6 10. Bd2 b5 11. Rc1 Bd7 12. Nc5 Bxc5 13. Rxc5 Rc8 14. Rc1 Ne7 15. Bb4 Re8 16. Ne5 Rxc1 17. Qxc1 Nc8 18. Qc5 Nb6 19. b3 Ne4 20. Qc2 Nc8 21. Rc1 f6 22. Nd3 h5 23. f3 g6 24. fxe4 dxe4 25. Nc5 Bc6 26. Nxa6 Bd5 27. Nc5 Re7

[Assistant] Bxb5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 g6 2. e4 Bg7 3. e5 c5 4. dxc5 Nc6 5. f4 d6 6. cxd6 exd6 7. Qxd6 Qxd6 8. exd6 Nf6 9. Nf3 O-O 10. Be2 Rd8 11. Nc3 Rxd6 12. Be3 Rd8 13. Kf2 Ng4+ 14. Kg3 Nxe3 15. Rhe1 Nf5+ 16. Kf2 Be6 17. g4 Nd6 18. Bd3 Nd4 19. Ne5 Nc6 20. Nf3 Nd4 21. Ng5 h6 22. Nh3 Bxg4 23. Ng1 Bf5 24. Bxf5 N4xf5 25. Rac1 Bd4+ 26. Kf3 Re8 27. Nh3 Rad8 28. Rxe8+

[Assistant] Rxe8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. b3 c6 2. Bb2 d6 3. e3 Nd7 4. Nf3 Qc7 5. Be2 Ngf6 6. O-O g5 7. Na3 g4 8. Nd4 e5 9. Nf5 h6 10. Bxg4 h5 11. Be2 Nc5 12. Nh4 Be7 13. d4 Nce4 14. dxe5 dxe5 15. f4

[Assistant] exf4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 g6 2. d4 d6 3. Nc3 Bg7 4. f4 Nf6 5. Nf3 O-O 6. e5 Ne8 7. Bc4 c6 8. e6 Bxe6 9. Ng5 Bxc4 10. Be3 h6 11. Qd2 hxg5 12. h4 gxf4 13. Bxf4 Nf6 14. Bh6 e5

[Assistant] O-O-O


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/4ppk1/3p2p1/3Pb3/5q2/5P1p/6PP/5RQK b - - 1 40

[Assistant] Bd4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: rn4k1/pp3rpb/2p4p/4N3/6P1/1BP4P/P1P5/3R2K1 w - - 0 19

[Assistant] Rd8#


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/7p/1p4p1/p2kp3/4n3/P3K2P/2PB2P1/8 w - - 2 45

[Assistant] c4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e3 b6 2. d4 Bb7 3. g3 e6 4. f3 Nf6 5. Bg2 c5 6. Ne2 Nc6 7. c3 Qc7 8. O-O h5 9. h3 h4 10. g4 Bd6 11. e4 Bg3 12. e5 Nd5 13. Nxg3 hxg3 14. Qe1 cxd4 15. Qxg3 dxc3 16. Nxc3 Nxc3 17. bxc3

[Assistant] Qxe5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/5k2/3p1Ppp/3P2P1/5K2/8/8/8 w - - 0 60

[Assistant] gxh6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 c5 2. Nc3 e6 3. e4 Nf6 4. e5 Ng8 5. f4 d6 6. Nf3 Nh6 7. d3 Nf5 8. Be2 h5 9. O-O g6 10. Ng5 Nc6 11. exd6 Bxd6 12. Nge4 Be7 13. b3 Nfd4 14. Qd2 O-O 15. Bb2 b6 16. Rae1 Bb7 17. Bd1 Rc8 18. Qf2 a6 19. Qg3 Nf5 20. Qh3 Ncd4 21. Ng3 Qd6 22. Nce4 Qc6 23. Nxf5 exf5 24. Ng5 Bxg5 25. fxg5 Rce8 26. Bxd4 cxd4 27. Bf3 Qc7 28. Bxb7 Qxb7 29. Qf3 Qxf3 30. gxf3 Kg7 31. f4 f6 32. gxf6+ Kxf6 33. h4 Re6 34. Rxe6+ Kxe6 35. Re1+ Kf6 36. Kf2 Rf7 37. Re5 Re7 38. Rxe7 Kxe7 39. b4 Kd6 40. Ke2 b5 41. cxb5 axb5 42. Kd2 Kc6 43. Kc2 Kb6 44. Kb2

[Assistant] Kc6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. b3 e5 2. Bb2 Nf6 3. e3 Nc6 4. f4 d6 5. fxe5 dxe5 6. Nf3 Bd6 7. Bb5 Bd7 8. Bxc6 Bxc6 9. Nxe5 Bxe5 10. Bxe5 O-O 11. Rg1 Nd7 12. Bd4 f6 13. Qg4 Qe7 14. Nc3 Nb6 15. O-O-O Nd5 16. Kb2 Rad8 17. h4 Bd7 18. Nxd5 Bxg4 19. Nxe7+ Kf7 20. Rdf1 Be6 21. Rf4 Kxe7 22. g4 Rd5 23. g5 fxg5 24. hxg5 Rxf4 25. exf4 Rf5 26. Be5 g6 27. Rh1 h5 28. gxh6 Bg8 29. h7 Bxh7 30. Rxh7+ Ke6 31. Rg7 Kd5 32. Rxg6 Rh5 33. d3 Rh1 34. c4+ Kc5

[Assistant] Kc3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6k1/p1r5/8/3p1p2/1NbPpPpp/P7/5KPP/2R5 w - - 0 38

[Assistant] Nxd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 5k1r/1rq2pp1/7p/pP1QN3/1b1P4/8/5PPP/1K5R w - - 1 25

[Assistant] Rc1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d3 Nf6 2. Nf3 g6 3. Nbd2 Bg7 4. e4 O-O 5. h3 d5 6. c3 dxe4 7. dxe4 Nc6 8. Qc2 Be6 9. Be2 Qd7 10. Nf1 Rad8 11. g4 Nxg4 12. hxg4 Bxg4 13. N3h2 Bxe2 14. Qxe2 Ne5 15. Ng3 Nd3+ 16. Kf1 Be5 17. Nf3 Bxg3 18. fxg3

[Assistant] Qg4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 Nf6 2. Bg2 d5 3. c4 c6 4. cxd5 cxd5 5. e4 Nc6 6. e5 Nxe5 7. f4 Ng6 8. Nf3 e6 9. O-O Bc5+ 10. Kh1 Bb6 11. Re1 O-O 12. d4 Ne4 13. Rf1 f5 14. Nc3 Bd7 15. Be3 Rc8 16. Ne5 Nxe5 17. fxe5 Bc6 18. Nxe4 dxe4 19. Rc1 Bd5 20. a3 Rxc1 21. b4 Qc8 22. Qxc1 Qxc1 23. Bxc1 Rc8 24. Bf4 Rc2 25. Rd1 h6 26. g4 g5 27. gxf5 gxf4 28. f6 Kf7 29. Rg1 e3 30. h4 Bxg2+ 31. Rxg2

[Assistant] Rxg2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e3 b5 5. a4 Bb7 6. Nc3 c6 7. Ne5 e6 8. Bd2 Nd7 9. Nxd7 Qxd7 10. Qg4 Nf6 11. Qf3 c5 12. Qf4 cxd4 13. Qxd4 Qxd4 14. exd4 b4 15. Na2 a5 16. f3 O-O-O 17. Bxc4 Rxd4 18. Rc1 Kb8 19. Be3 Rd8 20. Bb6 Bd6 21. Bxa5 Rc8 22. Nxb4 Rc5 23. Rd1 Rxa5 24. Rxd6

[Assistant] Rc8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. d4 cxd4 3. Nf3 d6 4. c3 d3 5. Bxd3 Nf6 6. c4 Nc6 7. Nc3 e6 8. O-O Be7 9. b3 O-O

[Assistant] Bb2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bd3 e5 7. Nf3 Be6 8. O-O Be7 9. h3 O-O 10. Be3 b5 11. Qe2 Nbd7 12. a3 Qc7 13. Rad1 Nc5 14. Bxc5 dxc5 15. Qe3 c4 16. Be2 Bc5 17. Qg5 Nd7 18. Nd5 Bxd5 19. Rxd5 h6

[Assistant] Qf5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 Nf6 2. g3 e6 3. Bg2 Be7 4. Nf3 c5 5. O-O Nc6 6. d4 cxd4 7. Nxd4 O-O 8. Nc3 d5 9. cxd5 exd5 10. Bg5 Be6 11. Nxe6 fxe6 12. e4

[Assistant] Nxe4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. b4 Nf6 2. Bb2 d6 3. c4 g6 4. e3 Bg7 5. Nf3 O-O 6. d4 Nbd7 7. Be2 e5 8. O-O exd4 9. Nxd4 Re8 10. b5 Nc5 11. Nd2 Nce4 12. Rc1 Nxd2 13. Qxd2 Ne4 14. Qc2 Nc5 15. Bf3 Rb8 16. a4 Bd7 17. Rfd1 Qh4 18. g3 Qh3 19. Bg2 Qh5 20. Ba1 Bg4 21. Re1 Bh3 22. Bh1 Bg4 23. a5 Ne6 24. Nxe6 Rxe6 25. Bxg7 Kxg7 26. c5 d5 27. Qb2+ Kg8 28. Qd4 Rd8 29. c6 bxc6 30. Rxc6 Rxc6

[Assistant] bxc6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e3 e5 2. d4 exd4 3. exd4 Nf6 4. Bd3 d5 5. Ne2 Nc6 6. c3 Be6 7. Qc2 Qd7 8. Bg5 Be7 9. Nd2 h6 10. Bf4 Nh5 11. Bg3 O-O-O 12. b4 Bf6 13. a4 Nxg3 14. hxg3 Ne7 15. a5 Bf5 16. b5 Bxd3 17. Qxd3 Qf5 18. Qxf5+ Nxf5 19. O-O Rhe8 20. Rfe1 Bg5 21. Nf3 Nd6 22. b6 cxb6 23. axb6 axb6 24. Kf1 Kc7 25. Ne5 Bf6 26. Nd3 Ra8 27. Nef4 Rxe1+ 28. Rxe1 Ra5 29. Nb4 Ra3 30. Nfxd5+ Kd8 31. Nxf6 gxf6 32. Nd5 f5 33. f3 Ra2 34. Re2 Ra1+ 35. Kf2 Ra3 36. Re3 b5 37. Rd3 Ra2+ 38. Ke3 Rxg2 39. Kf4 h5 40. Nf6 Rh2 41. Ke5 Nc4+ 42. Kxf5 Rh3 43. Kf4 h4

[Assistant] gxh4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d3 d6 6. e4 c5 7. Nbd2 Nc6 8. c3 Rb8 9. a3 a5 10. d4 cxd4 11. cxd4 e5 12. d5 Ne7 13. Re1 b5 14. a4 b4 15. Bf1 Nh5 16. Nc4 h6 17. Be3 f5 18. Rc1 f4 19. Bd2 Bg4 20. Be2

[Assistant] fxg3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 g6 2. Bg2 Bg7 3. Nf3 c5 4. O-O Nc6 5. c4 e5 6. d3 Nge7 7. Na3 O-O 8. Rb1 d5 9. b3 h6 10. Bb2 Be6 11. cxd5 Nxd5 12. Nc4 f6 13. a3 Rc8 14. Qd2 Nd4 15. Ba1 b6 16. Rfd1 Qe7 17. e3

[Assistant] Nxf3+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2r3k1/1p2bppp/4p1b1/p2rPN2/P4K2/2pR1P2/4Q1PP/3R4 b - - 10 28

[Assistant] Bxf5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c6 2. e4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Ng3 e6 6. Nf3 Ngf6 7. Bd3 Bd6 8. O-O O-O 9. Re1 Qc7 10. c3 b6 11. Qe2 Bb7 12. Bg5 Rac8 13. Rad1 h6 14. Bc1 c5 15. Bb1 Rfd8 16. Qc2 Nf8 17. Ne5 Bxe5 18. dxe5 Rxd1 19. Rxd1 Qxe5 20. h3 Qd5 21. f3 Qc6 22. c4 Qc7 23. b3 Qxg3 24. Qe2 Re8 25. Be3 Nh5 26. Bf2 Qg5 27. Qe1 Nf4 28. Qf1 Nxh3+ 29. Kh1 Nxf2+ 30. Qxf2 Ng6 31. Kg1 Rd8 32. Rxd8+ Qxd8 33. Bxg6 fxg6 34. Qe2 Qd4+ 35. Kh2 Kf7 36. g4 Qf4+ 37. Kg2 Qxf3+ 38. Qxf3+ Bxf3+ 39. Kxf3 e5 40. Ke4 Ke6 41. b4 h5 42. gxh5 gxh5 43. bxc5 bxc5 44. a4

[Assistant] a5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Bd3 Nc6 6. Nxc6 bxc6 7. O-O d5 8. Nc3 Be7 9. Kh1 O-O 10. f4 dxe4 11. Nxe4 Qb6 12. Qf3 Ba6 13. Be3 c5 14. Bxa6 Qxa6 15. Nxc5 Bxc5 16. Bxc5 Rfc8 17. Bd4 Nd5 18. c3 Rab8 19. Rf2 Ne7 20. Qe2 Qb7 21. Re1 Nf5 22. Be5 Ra8 23. Qf3 Qb5 24. g4 Ne7 25. Qe2 Qc6+ 26. Qe4

[Assistant] Rd8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. f4 e5 2. e3 d6 3. fxe5 dxe5 4. Nf3 e4 5. Be2 exf3 6. Bxf3 Nf6 7. O-O Bd6 8. d4 O-O 9. c4 c6 10. c5

[Assistant] Bc7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c6 2. c4 d5 3. Nc3 Nf6 4. cxd5 cxd5 5. e3 Nc6 6. f3 Bf5 7. Bd3 e6 8. Bxf5 exf5 9. Nge2 Bb4 10. O-O O-O 11. a3 Bd6 12. Qc2 Re8 13. Ng3 Rc8

[Assistant] Re1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6rk/p1q3r1/1p2p3/5p2/3pP3/2P4P/PP2Q3/R5RK w - - 0 33

[Assistant] Qh5+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. h4 Nc6 5. h5 Nxd4

[Assistant] h6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e3 d5 2. d4 e6 3. c4 Nf6 4. cxd5 exd5 5. Nc3 Be7 6. Nf3 O-O 7. Bd3 b6 8. O-O Bb7 9. Bd2

[Assistant] c5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 Nc6 6. dxc5 Qxc5 7. Na3 Qh5 8. Nb5 Bd7 9. Nc7+ Kd8 10. Nxa8 e5 11. Be2 Bc5 12. Bg5 h6

[Assistant] Bxf6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d6 2. c4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. e3 O-O 6. Bd3 Nbd7 7. O-O Rb8 8. h3 b6

[Assistant] a4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c5 2. dxc5 e6 3. Nc3 Bxc5 4. Nf3 Nf6 5. e3 Nc6 6. a3 O-O 7. Be2 d5 8. O-O e5 9. Na4 Bd6

[Assistant] b4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/5rk1/R2r2p1/1p3p1p/2pqp2P/2Q3P1/1PP5/R6K w - - 8 38

[Assistant] Rxd6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 d6 2. Bg2 Nd7 3. Nf3 Ngf6 4. Ng1 h5 5. Bxb7 h4 6. Bxa8 hxg3 7. hxg3 Rxh1 8. Bxh1 c6 9. Bg2 Bb7 10. d3 e5 11. Nc3 d5

[Assistant] e4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 c6 2. Bg2 d5 3. e3 Nf6 4. Ne2 Bg4 5. O-O Nbd7 6. d4 e5 7. c4 exd4 8. exd4 Nb6 9. cxd5 Nbxd5 10. Qb3 Qb6 11. Re1 Be7 12. Nec3 Qxb3 13. axb3 Be6 14. f4 O-O 15. f5 Bxf5 16. Nxd5 Nxd5 17. Bxd5 Bxb1 18. Rxb1 cxd5 19. Rxe7 Rac8 20. Bf4 Rc2 21. Rxb7 Re8 22. Ra1 g5 23. Be5 f6 24. Bxf6 Ree2 25. Rg7+ Kf8 26. Rxg5 Rg2+ 27. Kf1

[Assistant] Rgf2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. Nc3 d5 3. Nf3 dxe4 4. Nxe4 Nf6 5. Nc3 Bg4 6. d4 e6 7. Be3 Bd6 8. Be2 O-O 9. Ne5 Bxe2 10. Qxe2 Nbd7

[Assistant] Nxd7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nc3 Nc6 3. Nf3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Nxc6 dxc6 7. Qxd8+ Kxd8 8. Bg5 Kc7 9. O-O-O h6 10. Bd2 Nf6 11. e5 Nd7

[Assistant] f4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 g6 2. c3 Bg7 3. Nf3 Nf6 4. g3 O-O 5. Bg2 c5 6. O-O cxd4 7. cxd4 d6 8. Nc3 Nc6 9. e3 Bg4 10. Re1 Qd7 11. h3 Bxh3 12. Bxh3 Qxh3 13. Ng5 Qh5 14. Qxh5 Nxh5 15. Nd5 e6 16. Nc3 Rad8 17. Nf3

[Assistant] Nf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. Bc4 Nf6

[Assistant] d4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. g3 Nf6 5. Bg2 Nc6 6. Ne2 Bg4 7. f3 Bh5 8. O-O e6 9. Bf4 Qb6 10. b3 Be7 11. Nbc3 O-O 12. Kh1 Bg6 13. Na4 Qa5 14. Rc1 Ba3 15. Rb1 Nb4 16. c3 Nc6 17. Ra1 b5 18. Nc5 Bb2 19. Bd6 Rfe8 20. Rb1 Bxb1 21. Qxb1 Bxc3 22. a3 Bxd4 23. b4 Qxa3 24. Rd1 Bxc5 25. Bxc5 Qa6 26. Qb2 Qb7 27. g4 Nd7 28. Be3 Nde5 29. Bg5 Nc4 30. Qc3 a5 31. bxa5 Rxa5 32. Nd4 Nxd4 33. Qxd4 b4 34. h4 b3 35. h5 b2

[Assistant] h6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/4Q3/kp6/p7/P5qP/8/1P2pK2/8 w - - 5 52

[Assistant] Qxe2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. c3 Nf6 5. e5 Nd5 6. cxd4 d6 7. Nc3 Nxc3 8. bxc3 g6 9. exd6 Qxd6 10. Bd3 Bg7

[Assistant] O-O


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. f3 Bf5 5. Bb5+ Nbd7 6. Nc3 a6 7. Bd3 Bxd3 8. Qxd3 Nb6 9. Nge2 Nbxd5 10. O-O e6 11. Nxd5 Nxd5 12. Nc3 Be7 13. Nxd5 Qxd5 14. Qe4

[Assistant] O-O-O


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r1b2k1r/ppppn1p1/3q1p2/n3p1Qp/2B1P3/2PPB2N/PP4PP/R2K1R2 w - - 2 14

[Assistant] Bc5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r3r1k1/1ppb1p1p/3p1q2/p1nP1Pp1/2PN2Q1/1P6/P1B3PP/2R2RK1 b - - 1 22

[Assistant] Re4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 g6 2. d4 Bg7 3. g3 c5 4. Bg2 cxd4 5. Nxd4 Nc6 6. Nb3 Nf6 7. O-O O-O 8. c4

[Assistant] a5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. d4 d5 3. exd5 exd5 4. c4 Nf6 5. cxd5 Nxd5 6. Nc3 Be6 7. Bc4 Bb4 8. Bxd5 Bxd5

[Assistant] Qe2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 3R3r/pp2q1k1/5pp1/7p/1nQ4R/8/PPP2PB1/1K2N3 b - - 0 29

[Assistant] Qxe1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 5rk1/1bp4p/p5p1/1p2Qp2/3P4/q4P2/2B3PP/2R3K1 w - - 0 32

[Assistant] Rb1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d6 2. h4 Nf6 3. h5 h6 4. g3 Bf5 5. Nh3 c6 6. Nf4 e5 7. dxe5 dxe5 8. Qxd8+ Kxd8 9. Nd3

[Assistant] Nbd7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 d5 2. c4 e6 3. cxd5 exd5 4. d4 c6 5. Nc3 Bf5 6. Bg5 Be7 7. Bxe7 Qxe7 8. e3 Nf6 9. Bd3 Bxd3 10. Qxd3 O-O 11. O-O

[Assistant] Nbd7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: rnbqk2r/1p2bpp1/p4n1p/4N3/3p4/PB1P3P/1PP1NPP1/R1BQK2R b KQkq - 0 11

[Assistant] Qa5+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 g6 2. c4 Bg7 3. Nf3 d6 4. g3 Bg4

[Assistant] Bg2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 g6 2. Bg2 f6 3. Nf3 Nh6 4. O-O Nf7 5. d4 Bg7 6. c4 O-O 7. e4 e5 8. d5 c5 9. Nc3 d6 10. a3 a5 11. Rb1 Na6 12. Bd2 b6 13. Nb5 Bd7 14. b4 axb4 15. axb4 Bxb5 16. cxb5 Nc7 17. bxc5 dxc5 18. Qe2 Nd6 19. Rfc1 Qd7 20. Bf1 Ra2 21. Qd3 Rfa8 22. Ne1 R8a3 23. Rb3 Rxb3 24. Qxb3 Rxd2 25. Ra1 Ncxb5 26. Ra8+ Bf8 27. Nf3 Rd4 28. Nxd4 Nxd4 29. Qxb6 Nf3+ 30. Kg2 Ne1+ 31. Kg1 Nxe4 32. Qe6+ Qxe6 33. dxe6 Nf3+ 34. Kh1 Ne1 35. e7

[Assistant] Nxf2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r2b2k1/5p2/p2qp1bQ/1p6/4B3/6R1/PP3PPP/6K1 w - - 1 26

[Assistant] Rxg6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c3 Nf6 3. Nf3 e6 4. Bg5 Bd6 5. Bxf6 Qxf6 6. e3 Nd7 7. Bd3 e5 8. dxe5 Nxe5 9. Nxe5 Qxe5 10. Nd2 O-O 11. Nf3 Qe7 12. Qc2 g6 13. O-O-O c6 14. h4 f5 15. h5 Be6 16. hxg6 hxg6 17. Rh6 Kg7 18. Rdh1 Rfh8 19. Rh6xh8

[Assistant] Rxh8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 e6 2. c4 c5 3. Nc3 cxd4 4. Qxd4 Nc6 5. Qd3 Nf6 6. Nf3 Bb4 7. Bd2 d5 8. a3 Ba5 9. cxd5 exd5 10. e3 O-O 11. Be2 Re8 12. O-O Bg4 13. b4 Bb6 14. h3 Bh5 15. Rac1 Bg6 16. Qb5 a6 17. Qa4 d4 18. exd4 Nxd4 19. Nxd4 Bxd4 20. Bf3 b5 21. Qb3 Rc8 22. Rfd1 Qb6 23. Rf1 h5 24. Nd5 Nxd5 25. Bxd5 Rcd8 26. Bc3 Re2 27. Bxd4 Qxd4 28. Bf3 Rd2 29. Rfd1 h4 30. Rxd2 Qxd2 31. Rd1 Qg5 32. Rxd8+ Qxd8 33. Qd5 Qf6 34. Qb7 Qa1+ 35. Kh2 Qe5+ 36. g3 Qa1 37. Kg2 Qxa3 38. gxh4 Qxb4 39. h5 Qe7 40. Qb8+ Qf8 41. Qxf8+ Kxf8 42. hxg6 fxg6 43. Be2 a5 44. Kf3 b4 45. Bc4 Ke7 46. Bb5 Kf6 47. Ba4 Kg5 48. Kg3 Kf5 49. f4 g5 50. fxg5 Kxg5 51. h4+ Kh5 52. Kh3 g5 53. hxg5 Kxg5 54. Kg3 Kf5 55. Kf3 Ke5 56. Ke3 Kd5 57. Kd3 Kc5 58. Bb3 Kb5 59. Bc2 a4 60. Bd1 a3 61. Kc2 Ka4 62. Kb1+ b3 63. Ka1 Kb4 64. Kb1

[Assistant] a2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. Qe2 d5 3. exd5 Qxd5 4. Nf3 Qd8 5. d4 Nf6 6. g3 Bd7 7. Bg2 Bc6 8. O-O Nbd7 9. Rd1 Bd6 10. c4 a6 11. a3 O-O 12. Nc3 b5 13. c5 Be7 14. b4 Nd5 15. Ne4 N7f6 16. Ne5 Nxe4 17. Nxc6 Nec3

[Assistant] Qe1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d6 2. d4 c6 3. Nc3 Nd7 4. Nf3 Qc7 5. Be3 e5 6. Qd2 Ngf6 7. O-O-O a6 8. Bc4 b5 9. Bb3 b4 10. Na4 Nxe4 11. Qe2 Nef6 12. dxe5 dxe5 13. Ng5 Nd5 14. Rxd5 cxd5 15. Bxd5 f6 16. Ne6 Qd6 17. Rd1 Rb8 18. Bb3 Qe7 19. Nc7+ Kd8 20. Ne6+ Ke8 21. Nac5 g6 22. Nc7+

[Assistant] Kd8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 7Q/p5r1/1p6/2p1bk2/8/2Ppp3/PP6/1K5R b - - 0 39

[Assistant] Rg1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bf5 5. d4 h6 6. Bf4 Ne4 7. Nbd2 Nd7 8. Ne5 Nxd2 9. Qxd2 e6 10. Rfe1 Be7 11. e4 dxe4 12. Bxe4 Bxe4 13. Rxe4 O-O 14. Rae1 Nf6 15. R4e2 Nd5 16. c3 Rc8 17. Nd3 c5 18. Nxc5 Bxc5 19. dxc5 Rxc5 20. Be5 Nb6 21. Bd4 Rd5 22. Qc2 Qg5 23. Qb3 Rc8 24. Bxb6 axb6 25. Qxb6 Rb5 26. Qd6 Rd5 27. Qb6 Rb5

[Assistant] Qd6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2kq3r/1p2bp2/r2p3p/1Qp3p1/P1Pp4/5PP1/1B2P1KP/RR6 w - - 0 24

[Assistant] Bxd4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d6 2. Nf3 Nf6 3. Nc3 Nbd7 4. d3 e5 5. Be2 c6 6. O-O b5 7. h3 b4 8. Nb1

[Assistant] d5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 cxd4 5. cxd4 e5 6. Nf3 e4 7. Nc3 Bb4

[Assistant] Ne5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 g6 2. g3 Bg7 3. Bg2 d6 4. O-O e5 5. d3 Nc6 6. c4 f5 7. Nc3 Nf6 8. Rb1 O-O 9. Bg5 h6

[Assistant] Bxf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r4rk1/1p3pp1/1p1p2qp/pP2p3/P3Pn2/1BPP1N1P/5P1P/R2Q1R1K b - - 2 17

[Assistant] Qg2#


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6kr/p4r2/1p4p1/2p5/3p2P1/P2P4/1PP1Qq2/1K5R w - - 0 38

[Assistant] Qe8+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d3 d5 2. g3 Nf6 3. Bg2 c6 4. Nf3 Bg4 5. O-O Bh5

[Assistant] Nbd2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. exd5 Nf6 3. Nc3 Nxd5 4. Nge2 Nxc3 5. Nxc3 e5 6. g3 Bd6 7. Bg2 O-O 8. O-O c6 9. h3 Be6 10. d3 Qd7 11. Kh2 Na6 12. f4 Nc7 13. fxe5 Bxe5 14. Bf4 Bxf4

[Assistant] Rxf4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 4r2k/p1p2Qpp/3b3q/2p2p2/4n3/1P2PN2/PBP3PP/R4RK1 b - - 0 20

[Assistant] Bxh2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. b3 e6 2. Bb2 Nf6 3. e3 d5 4. Nf3 Be7 5. d4

[Assistant] c5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: RQ6/5ppk/3b3p/3p4/1P6/5N1P/1r3PP1/6K1 b - - 0 31

[Assistant] Rb1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 d5 2. g3 e6 3. Bg2 c5 4. O-O Nf6 5. d3 Be7 6. Nbd2 O-O 7. e4 Nc6

[Assistant] Re1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 3Q4/1p2rppk/6p1/2p1b3/1q4P1/1P3N1P/5P2/6K1 w - - 2 32

[Assistant] Ng5+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 d5 2. Bg2 Nf6 3. Nf3 h6 4. O-O c6 5. c3 Bf5 6. Qb3 Bc8 7. d3 e6 8. Be3 Nbd7 9. Nbd2 Bc5 10. Bd4 O-O 11. e4 Re8 12. Rae1 e5 13. Bxc5 Nxc5 14. Qc2 dxe4 15. dxe4 Nd3 16. Re3 Nc5 17. Rd1 Qc7 18. Nc4 Bg4 19. b4 Ncd7 20. Red3 Rad8 21. Nd6 Rf8 22. c4 a6

[Assistant] c5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 Nc6 2. g3 e5 3. Bg2 h5 4. h4 d5 5. d3 f6 6. c4 Nge7 7. cxd5 Nxd5

[Assistant] Nc3