[System] You are a 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: 8/1pp5/p3pk2/4n3/4K1PP/2P2P2/P7/8 w - - 1 38

[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. Nf3 d5 2. g3 Nf6 3. Bg2 c5 4. O-O Nc6 5. d3 Bg4 6. c3 Qd7 7. Nbd2 O-O-O 8. b3 h5 9. b4 Bh3 10. bxc5 h4 11. e4 Bxg2 12. Kxg2 hxg3 13. fxg3 Qh3+ 14. Kf2 Ng4+ 15. Ke2 Nxh2 16. Rh1 Qg2+ 17. Ke3 Ng4+ 18. Kf4 Rxh1

[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] FEN: r4rk1/5pb1/pp1p2pp/8/2P1bBnq/1P6/P1NQB1PP/2R2R1K w - - 4 20

[Assistant] Bg3


[System] You are a 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/pp1n3p/2p2R2/4P1r1/3P3P/2P2Q2/1P2R1K1/1q6 w - - 0 31

[Assistant] hxg5


[System] You are a 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 Bg4 4. f3 Bh5 5. e4 Bg6 6. h4 h5 7. Nh3 e5 8. dxe5 dxe5 9. Qxd8+ Kxd8 10. Bg5 Nc6

[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: 1r3rk1/pbQnqpbp/1p1p2P1/8/3Pn3/1N1B1N2/PP4PP/R1B2RK1 b - - 0 15

[Assistant] Rfc8


[System] You are a 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 Nf6 4. O-O O-O 5. d3 d6 6. e4 e5 7. h3 Nbd7 8. Nc3 c6 9. Nh2 Ne8 10. f4 exf4 11. gxf4 f5 12. Be3 fxe4 13. dxe4 Ndf6 14. Qd2 Qe7 15. Rad1 Nh5 16. Ng4 Be6 17. Ne2 Rd8 18. Nd4 Bc8 19. f5 c5 20. Bg5

[Assistant] Nef6


[System] You are a 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: r3kbnr/pp1b1ppp/3p1q2/1B1Pn3/3Q1B2/2N5/PP3PPP/R3K1NR b KQkq - 3 10

[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. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. Be2 b5 8. a3 Bb7 9. O-O Nbd7 10. f3 Be7 11. Qd2 Rc8 12. Kh1 h5 13. Rad1 h4 14. Qd3 h3 15. g3 Ne5 16. Qd2 Nc4 17. Bxc4 Rxc4 18. Qf2 Qa8 19. Nce2 e5 20. Nf5 Rxc2 21. Nxe7 Kxe7 22. Rd2 Rhc8 23. Rfd1 Rxd2 24. Rxd2 d5 25. exd5 Nxd5 26. Bc5+ Ke8 27. Nc3 Nxc3 28. bxc3 Bxf3+ 29. Kg1 e4 30. Qd4 Qc6 31. Bb4 f6 32. Kf2 Kf7 33. Ke3 Kg6 34. Qd7 Qxd7 35. Rxd7 Rc6

[Assistant] Bf8


[System] You are a 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 e6 7. g4 Qc7 8. g5 Nfd7 9. f4 b5 10. Qd2 Bb7 11. a3 Nc6 12. O-O-O Rc8 13. Kb1 Na5 14. h4 Nc4 15. Bxc4 Qxc4 16. h5 Nc5 17. b3 Nxe4 18. Nxe4 Qc7 19. Ng3 Bxh1 20. Rxh1 a5 21. f5 e5 22. Nxb5 Qb7 23. a4 d5 24. Rd1 d4 25. Bxd4 exd4 26. Qxd4 Qc6 27. Re1+ Be7 28. Nd6+ Kf8 29. Nxc8 Qxc8 30. f6 gxf6 31. gxf6 Bb4 32. Re2 Rg8 33. Nf5 Rg5 34. Ng7

[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. d4 g6 2. e4 Bg7 3. Nc3 c5 4. d5 d6 5. Nf3 e5 6. Be2 Nf6 7. Bg5 h6 8. Bh4 g5 9. Bg3 a6 10. a4 b6 11. Nd2 Bf8 12. h3 Be7 13. Bg4 h5 14. Bf5 h4 15. Bh2 Nh5 16. Nf1 Nf4 17. Ne3 Bxf5 18. exf5 f6 19. Ne4 Nd7 20. Qd2 Qc7 21. c4 a5 22. b3 O-O-O 23. O-O-O Kb7 24. Kb2 Rdg8 25. Ka2 Qd8 26. Ng4 Qf8 27. Rhg1 Rg7 28. f3 Rgg8 29. Bxf4 exf4 30. Qc3 Ne5 31. Nxe5 fxe5 32. f6 Bxf6 33. Qd3 Be7 34. Rge1 Qf7 35. Re2 Rc8 36. Nf2 Qh7 37. Re4 Rhd8 38. Ng4 Qg7 39. Rde1 Bf6 40. Qc2 Rc7 41. Qd3 Rdc8 42. Qc2 Kb8 43. Qd3 Kb7 44. Qc2 Kb8 45. Qd3 Kb7

[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. f4 g6 2. Nf3 Bg7 3. e3 f5 4. Be2 e6 5. O-O Ne7 6. Nc3 d5 7. b3 Nbc6 8. Bb2 O-O 9. Bb5 Bd7 10. Bxc6 Bxc6 11. Ne5 Nc8 12. Nxc6 bxc6 13. Na4 Nd6 14. Bxg7 Kxg7 15. Nc5 Qe7 16. d4 Ne4 17. Qd3 Nxc5 18. dxc5

[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. Nf3 e6 3. Bf4 c5 4. e3 b6 5. Nbd2 cxd4 6. exd4 Bb7 7. Bd3 Be7 8. O-O O-O 9. Re1 d6 10. c4 Nbd7 11. Rc1 Rc8 12. Qe2 Re8 13. h3 Bf8 14. Ne4 Nxe4 15. Bxe4 Bxe4 16. Qxe4 Nf6 17. Qd3 d5 18. Be5 dxc4 19. Rxc4 Rxc4 20. Qxc4 Nd5 21. Rc1 f6 22. Bc7 Qd7 23. Bg3 Bd6 24. Bxd6 Qxd6 25. a3 Rd8 26. Qc6 Kf7 27. Qxd6 Rxd6 28. Kf1 Ke7 29. g3 Kd7 30. Ke2 Ne7 31. Rc2 Nc6 32. Ke3 g5 33. g4 Rd5 34. b4 a5 35. Rb2 axb4 36. axb4 Rb5 37. Ke4 Rxb4 38. Rd2 e5 39. Kf5 Nxd4+

[Assistant] Nxd4


[System] You are a 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: 1r1q1b1r/p1p1kBp1/7p/2p5/6P1/1Q2P1P1/PP5P/R1B1K1NR b KQ - 0 14

[Assistant] Rxb3


[System] You are a 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 d6 5. Bg2 Nbd7 6. O-O O-O 7. d3 a6 8. e4 Rb8 9. Ne1 b5 10. b3 b4 11. Ne2 Nxe4 12. Rb1 Nc3 13. Nxc3 bxc3 14. Qc2

[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: 3r2k1/pp3ppp/4p3/2N5/7q/1Q3P2/PP1R2PP/4R2K b - - 0 24

[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] 1. e4 c6 2. Nf3 d5 3. exd5 cxd5 4. d4 Bg4 5. Bd3 Nf6 6. c3 Nc6 7. O-O e6 8. Re1 Bd6 9. Bg5

[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. Nf3 c6 2. g3 d5 3. Bg2 Nf6 4. b3 Bg4 5. Bb2 Bxf3 6. exf3 Nbd7 7. f4 g6 8. O-O Bg7 9. Re1 O-O 10. c4 e6 11. d3 a5 12. a3 a4 13. b4 b5 14. Nd2 Nb6 15. c5 Nbd7 16. Bxf6 Qxf6 17. d4 Qxd4 18. Ra2

[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. e4 d6 2. Nc3 Nf6 3. f4 g6 4. Nf3 Bg7 5. Bc4 O-O 6. O-O c6 7. a4 Nbd7 8. d3 Rb8 9. a5 b5 10. axb6 axb6 11. Be3 b5 12. Bb3 Nb6 13. h3 Qc7 14. Qe1 Bb7 15. Qf2 Nbd7 16. Ra7 Ra8

[Assistant] Rfa1


[System] You are a 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. g3 d5 3. Bg2 Nf6 4. Nf3 Be7 5. h3 O-O 6. O-O Re8 7. e4 c5 8. e5 Nfd7 9. Re1 Nf8 10. Nfd2 Ng6 11. f4 Nc6 12. Nf3 Qb6 13. Kh2

[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. Nf3 d5 2. g3 c6 3. Bg2 g6 4. O-O Bg7 5. d3 Nf6 6. Nbd2 O-O 7. e4 e6 8. e5 Nfd7 9. d4 c5 10. dxc5 Nc6 11. Re1 Qc7 12. Nb3 Ndxe5 13. Bf4 Nxf3+ 14. Bxf3 e5 15. Bg5 f6 16. Bg2 fxg5 17. h4 Qf7 18. hxg5 Qxf2+ 19. Kh1 Qxg3 20. Rf1 Bh3 21. Rxf8+ Rxf8 22. Qg1 Rf2 23. Bxh3

[Assistant] Qxh3+


[System] You are a 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. e3 c5 4. Be2 cxd4 5. exd4 b6 6. c3 Bb7 7. O-O d6 8. Re1 Nbd7 9. Bf4 Be7 10. Nbd2 O-O 11. Bd3 Re8 12. h3 Nf8 13. Qe2 d5 14. Ne5 Bd6 15. Ndf3 Qc7 16. Qd2 Ng6 17. Nxg6 hxg6 18. Bxd6 Qxd6 19. Ne5 Rad8 20. Qf4 Qe7 21. Bb5 Rf8 22. Re3 Ne4 23. Bd3 a6 24. Rae1 Rb8 25. h4 g5 26. hxg5 Qxg5 27. Rxe4

[Assistant] Qxf4


[System] You are a 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 d5 4. Nc3 Be7 5. Bxf6 Bxf6 6. e4 dxe4 7. Nxe4 O-O

[Assistant] Qd3


[System] You are a 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/pp1bbp2/2pp3p/3P2P1/3QP1n1/2N2P2/PPP2B2/2KR1B1R b - - 0 15

[Assistant] Bxg5+


[System] You are a 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/pp3ppp/3p4/8/1P2qPQ1/8/P1pB2PP/2R4K b - - 1 25

[Assistant] Qd3


[System] You are a 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. e5 Bf5 4. Be2 e6 5. g4 Bg6 6. h4 h6 7. g5 hxg5 8. Bxg5 Be7 9. Bxe7 Nxe7 10. Nf3 Nf5 11. Nc3 Bh5 12. Qd3 Nd7 13. O-O-O Qe7 14. Ng5 Bxe2 15. Nxe2 O-O-O 16. Nf3 Kb8 17. Kb1 Rc8 18. h5 c5 19. c3 c4 20. Qd2 Rh7 21. Qg5 Rch8 22. Ng3 Qxg5 23. Nxg5 Nxg3 24. fxg3 Rxh5 25. Rxh5 Rxh5 26. Nxf7 Rh3 27. g4 Rg3 28. g5 b5 29. a3 a5 30. Rh1 b4 31. axb4 axb4 32. cxb4 Nb6 33. Rh8+ Kc7 34. Rh7 Kc6 35. Rxg7 Kb5 36. Nd6+ Ka4 37. Rb7 Kb3 38. Kc1

[Assistant] Na4


[System] You are a 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. Nf3 a6 4. d4 cxd4 5. Nxd4 b5 6. Be3 Bb7 7. Bd3 Qc7 8. f3 Nf6 9. Qd2 b4 10. Nce2 d5 11. exd5 Nxd5 12. Bf2 Nd7 13. Nf4 Be7 14. Nxd5 Bxd5 15. O-O O-O 16. c3 bxc3 17. bxc3 Rac8 18. c4

[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. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. h3 d6 6. Nf3 c5 7. d5 Nbd7 8. Bd3 Ne8 9. O-O Ne5 10. Be2 f5 11. exf5 Bxf5 12. Ng5 h6 13. Ne6 Bxe6 14. dxe6 Nc7 15. Bg4 h5 16. Bf3 Nxe6 17. Bxb7 Rb8 18. Bd5 Qd7 19. Ne4 Kh8 20. b3 Nd4 21. Be3

[Assistant] Nef3+


[System] You are a 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: 8/1R5p/5pk1/4p1p1/2qb2P1/1N5P/P4P2/2R3K1 b - - 3 43

[Assistant] Bxf2+


[System] You are a 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. b3 f6 3. Bb2 Nh6 4. Bg2 Nf7 5. d3 Bg7 6. e3 O-O 7. Ne2 d5 8. Nd2 e5 9. h4 c6 10. h5 g5 11. a3 h6 12. c4 Be6 13. f3 Qd7 14. g4 f5 15. Ng3 fxg4 16. fxg4 Bxg4 17. Qc2

[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. e4 e5 2. Bc4 f5 3. exf5 Nf6 4. d4 exd4 5. Qxd4 Nc6 6. Qe3+ Be7 7. Nc3 d5 8. Bb5 d4

[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] FEN: 4r1k1/4r2p/p2p4/3Pbppq/2Pn1B2/1P4RP/P4QP1/1B2R2K b - - 1 32

[Assistant] Bxf4


[System] You are a 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 c5 3. c3 Nc6 4. Nf3 Be7 5. d4 d5 6. e5 Qb6 7. Qb5 Qxb5 8. Bxb5 Bd7 9. Bxc6 Bxc6 10. Bg5 Bf8 11. Nbd2 h6 12. Be3 b5 13. dxc5 Ne7 14. Bd4 Bb7 15. b4 a5 16. Ke2 Nc6 17. a3 Be7 18. Nb3 Kd7 19. Rhe1 Ra6 20. Kd2 Rha8 21. Kc2 g5 22. h3 h5 23. Kb2 g4 24. hxg4 hxg4

[Assistant] Nh2


[System] You are a 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 f5 3. f4 Nf6 4. g3 Be7 5. Bg2 O-O 6. d3 d6 7. Nd2 Nc6 8. e4

[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. e4 e6 2. d4 c5 3. Nf3 cxd4 4. Nxd4 a6 5. Nc3 b5 6. a3 Bb7 7. g3 f5 8. Bg2 Nf6 9. O-O fxe4 10. Bg5 Be7 11. Bxf6 Bxf6 12. Nxe4 Bxe4 13. Bxe4 Ra7 14. c3 Rc7 15. Qh5+ g6 16. Qe2 O-O 17. Rad1 Rc4 18. Nxe6 Qe7 19. Nxf8 Rxe4 20. Nxg6 Rxe2 21. Nxe7+ Bxe7 22. Rfe1 Rxe1+ 23. Rxe1 Kf7 24. f4 Nc6 25. Kf2 Na5 26. Kf3 Nc4 27. Re2 Bf6 28. h3 d6 29. g4 Bh4 30. Ke4 Kf6 31. Kd5 Bg3 32. Ke4 Bh4 33. Rg2 h6 34. Re2 Ke6 35. Kd4+ Kd7 36. Kd3 Bg3 37. Ke4 Bh4 38. Kf5 Be7 39. Kg6 Bf8 40. h4 d5 41. g5 hxg5 42. fxg5 Nd6 43. h5 Ne4 44. h6 Ng3 45. Rd2 Ke6 46. h7 Ne4 47. Re2 Bd6 48. h8=Q Be7 49. Rxe4+ dxe4 50. Qc8+ Kd6 51. Qxa6+ Ke5 52. Qxb5+ Kf4 53. Qe2 Bc5 54. a4 e3 55. a5 Ke4

[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. d4 Nf6 2. Bg5 c5 3. d5 Qb6 4. Nc3 h6 5. Bd2 e5 6. e4 d6 7. f3 Be7 8. Bb5+ Nbd7 9. a4 Qc7 10. a5 a6 11. Bxd7+

[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] FEN: r1bqk2r/1p1p1ppp/p1n5/4Q1B1/4n3/8/PPP2PPP/RN2KB1R b KQkq - 0 9

[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] FEN: r1b4k/ppppbrp1/6qp/4p3/7Q/5N1P/PP1B1PP1/R3R1K1 w - - 2 21

[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] FEN: 6k1/8/3p3p/1P1P4/6Q1/P3p2q/7N/7K b - - 0 43

[Assistant] Qxg4


[System] You are a 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. d4 Nf6 5. Nf3 Bf5 6. Bc4 e6 7. Bg5 c6 8. Qe2 Be7 9. O-O Nbd7 10. Rfe1 O-O 11. Rad1 b5 12. Bb3 a5 13. a4 b4 14. Nb1 Qb6 15. Nbd2 Rfe8 16. Nc4 Qa7 17. Be3 Nd5 18. Bg5 Bxg5 19. Nxg5 h6 20. Nf3 N7b6 21. Nd6 Red8 22. Nxf5 exf5 23. Ne5 Qc7 24. Qh5

[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 d5 2. Nf3 c5 3. g3 cxd4 4. Nxd4 e5 5. Nb3 Nf6 6. Bg2 h6 7. O-O Be6 8. c4 Nc6 9. cxd5 Bxd5 10. Bh3 Be7 11. Nc3 Be6 12. Bxe6 fxe6 13. Be3 Ng4 14. Bc5 Nd4 15. Bxe7 Kxe7 16. Nc5 Nf6 17. e3 Nc6 18. Qb3 Qc8 19. Rac1 b6 20. N5e4 Qb7 21. Rfd1 Rhd8 22. Qa3+ Kf7 23. Nd6+ Rxd6 24. Rxd6 Ne7 25. Rcd1 Nf5 26. R6d2 Qf3 27. Qa4 a6 28. e4 Nd4 29. Rxd4 exd4 30. Rxd4 Re8 31. Qd1 Qxd1+ 32. Rxd1 Ke7 33. e5 Ng4 34. f4 Ne3 35. Rd6 Nc4 36. Rc6 b5 37. Rxa6 b4 38. Ra7+ Kf8 39. Ne4 Rd8 40. Rb7 Rd1+ 41. Kf2 Ne3 42. Rxb4 Nf5 43. Rb7 Rc1 44. a4 Ra1 45. b3 Nd4 46. Nd6 Kg8 47. Rb4 Nc2 48. Rb8+ Kh7 49. b4 Rxa4 50. b5 Ra2 51. Kg1 Nd4 52. b6 Nf3+ 53. Kf1 Nxh2+ 54. Ke1 Nf3+ 55. Kd1 Rb2 56. b7 Nd4 57. Rc8 Rb1+ 58. Kd2 Nf3+ 59. Ke3 Nh2 60. b8=Q Ng4+ 61. Kf3 Rf1+ 62. Kg2

[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] FEN: r1bqr1k1/pp1n1pp1/2p1p2p/3nN3/3PB3/B1PQ4/P1P2PPP/R3K2R w KQ - 6 13

[Assistant] Bh7+


[System] You are a 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: r4rk1/1pp2pp1/1p1p3p/3Pp1q1/1P2P1bN/P2B1PPn/2P5/R2Q2KR w - - 1 19

[Assistant] Kg2


[System] You are a 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: r3k1nr/pp1b1ppp/4p3/qB1pP3/8/1Qb5/P2N1PPP/2R1K2R w Kkq - 2 14

[Assistant] Bxd7+


[System] You are a 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. Nc3 a6 4. d4 cxd4 5. Nxd4 b5 6. Bd3 Bb4 7. O-O Nf6 8. e5 Bc5 9. exf6 Bxd4 10. fxg7 Bxg7 11. Qg4 Qf6 12. Ne4 Qe5 13. Nd6+ Qxd6

[Assistant] Qxg7


[System] You are a 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: r1b2rk1/p1q2p1p/2pb2PQ/3p3n/3P4/2NB3P/PP4P1/R1B2RK1 b - - 0 17

[Assistant] Bh2+


[System] You are a 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: 2kr1b1r/p2q2p1/3p2B1/1p1pP3/3P4/3Q1Pp1/PP1P4/R1B2RK1 b - - 1 21

[Assistant] Rh1+


[System] You are a 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: 8/6pk/Q5pp/3P3r/8/6qP/PP4P1/6RK b - - 0 28

[Assistant] Rxh3+


[System] You are a 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 b6 4. Bxf6 Qxf6 5. e3 Nc6 6. Nbd2 d5 7. c4 Bd6 8. cxd5 exd5 9. Bb5 Bb7 10. Qa4 Bb4 11. Qxb4 a5 12. Qa4 O-O-O 13. Rc1 Nb4 14. O-O

[Assistant] Kb8


[System] You are a 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: r1b1k1nr/pppp1p1p/1b6/4n1q1/2BP1p2/2P5/PP4PP/RNBQ1RK1 w kq - 0 10

[Assistant] Bxf4


[System] You are a 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. Nc3 Nf6 3. e4 Nxe4 4. Nxe4 dxe4 5. f3 e5

[Assistant] fxe4


[System] You are a 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: 5rkr/4RR2/p6p/5b1P/1p3N2/2p5/PPP5/1K6 w - - 3 32

[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] FEN: 5rkb/p6p/1p2r1p1/4p3/PP2P3/2Pq2PP/5BK1/R1Q1R3 b - - 3 28

[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] 1. d4 Nf6 2. Bg5 g6 3. Bxf6 exf6 4. e3 d5 5. c4 Be6 6. cxd5 Bb4+ 7. Nc3 Bxd5 8. Nf3 O-O 9. Be2 Bxc3+ 10. bxc3 Qd6 11. O-O Nc6 12. Rb1 b6 13. c4 Be4 14. Rb3 Nb4 15. Qd2 Nc6 16. h3 Rad8 17. Rc3 Ne5 18. Nxe5 fxe5 19. d5 Rfe8 20. f3 Bf5 21. e4 Bd7 22. Qe3 c5 23. Bd3 Re7 24. Bc2 Bc8 25. g4 Kg7 26. Kg2 Qf6 27. Bd3 Kg8 28. Qh6 Bd7 29. Rc2 Ba4 30. Rcf2 Qf4 31. Qxf4 exf4 32. g5 Re5 33. h4 Kg7 34. Rh1 f6 35. gxf6+ Kxf6 36. Bc2 Bxc2 37. Rxc2 Rh5 38. Rd2 h6 39. Rh3 Ke5 40. Kh2 Rd6 41. Kh1 g5 42. Kh2 gxh4 43. Rg2 Rg5 44. Rxh4 Rdg6 45. Rxg5+ hxg5 46. Rh8 a6 47. Re8+ Kd4 48. e5 Kxc4 49. d6 Kd5 50. d7 Rh6+

[Assistant] Kg2


[System] You are a 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. Nf3 Nf6 4. g3 Be7 5. Bg2 O-O 6. O-O d5 7. d3 dxc4 8. dxc4 Qc7 9. Qc2 a6 10. Nb5 axb5 11. cxb5 Nbd7 12. Bf4

[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] 1. e4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. Bb5 Bd6 5. d3 O-O 6. Ne2 Re8 7. Ng3 Bf8 8. O-O a6 9. Bxc6 dxc6 10. b3 Bg4 11. h3 Bd7 12. Bb2 Bd6 13. Qe2 Qe7 14. Nh4

[Assistant] Rad8


[System] You are a 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: rn3rk1/1bb3p1/2p1pq2/ppPpN3/3P3P/1P1BP3/P4P2/R2QK2R w KQ - 0 18

[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. d4 d5 2. c3 e6 3. e3 Nf6 4. Nf3 Be7 5. Bd3 O-O 6. Qc2 b6 7. Nbd2 Nbd7 8. e4 Nxe4 9. Nxe4 dxe4 10. Bxe4 Rb8 11. Bd3 Nf6 12. Bg5 h6

[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] 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7 6. Be2 Nge7 7. O-O Ng6 8. g3 cxd4 9. cxd4 f6 10. Bd3 fxe5 11. Bxg6+ hxg6 12. dxe5 Be7 13. Be3

[Assistant] Rh5


[System] You are a 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. Nf3 d5 6. Bd3 c5 7. O-O dxc4 8. Bxc4 cxd4 9. exd4 b6 10. Bg5 Bb7 11. Ne5 Nc6 12. Nxc6 Bxc6 13. Qd2 h6 14. Bh4 Be7 15. Rad1 Qd7 16. Bg3 Rfd8 17. Be5 Rac8 18. Bb3 Bd5 19. Bc2 Bb7 20. Qd3 g6 21. Qh3 Kh7 22. Bf4 Bf8 23. Bg5 Bg7 24. Qh4 Rxc3 25. bxc3 Qd5 26. f3 Qxg5 27. Qxg5 hxg5 28. Rfe1 Nd5 29. Rd3 Nxc3 30. Rxc3 Bxd4+ 31. Rce3 Rc8 32. Bb3 Rc3 33. Kf2 Rxe3 34. Rxe3 f5 35. Ke2 Ba6+ 36. Kd2 Bxe3+ 37. Kxe3 e5 38. g3 f4+ 39. Ke4 Bb7+ 40. Kxe5 fxg3 41. hxg3 Bxf3 42. Kf6 Kh6 43. Bf7 a5 44. Bxg6 Bd5 45. a3 b5 46. Bc2 b4 47. axb4 axb4 48. Ke5 b3 49. Bd3 Bf7 50. Kf6 Bd5 51. Ke5 Bg8 52. Kf6 b2

[Assistant] Ke7


[System] You are a 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/pp2bp2/4b2Q/2p3N1/3Pn3/7P/PPP2PP1/R4RK1 w - - 0 16

[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] 1. e4 d5 2. exd5 Qxd5 3. d4 e5 4. dxe5 Qxd1+ 5. Kxd1 Nc6 6. Bb5 Bg4+ 7. f3 O-O-O+ 8. Nd2 Bd7 9. Bxc6 Bxc6 10. b3 Ne7 11. Bb2 Nf5 12. Ke2 Bc5 13. Ne4 Bxe4 14. fxe4 Nd4+ 15. Bxd4 Bxd4 16. Rd1 Bxe5 17. Nf3 Bf4 18. Rxd8+ Rxd8 19. Rd1 Rxd1 20. Kxd1 Kd7 21. Ke2 Ke6 22. g3 Be5 23. Kd3 b5 24. Ng5+ Ke7 25. Nf3 Kd6 26. a4 a6 27. axb5 axb5 28. c4 c6 29. cxb5 cxb5 30. b4 h6 31. Ne1 g6 32. Nc2 f5 33. exf5 gxf5 34. Ne3

[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. e4 g6 2. Nc3 Bg7 3. Nf3 d6 4. d4 Nc6 5. h4 e5 6. d5 Nce7 7. h5 f5 8. hxg6 hxg6 9. exf5 Rxh1 10. fxg6 Nxg6 11. Be3 Nf4 12. Bxf4 exf4 13. Qe2+ Qe7 14. Ne4 Nf6 15. Nxf6+ Bxf6 16. O-O-O Qxe2 17. Bxe2 Rxd1+ 18. Kxd1 Bf5 19. g3 fxg3 20. fxg3 Kf7 21. Ng1 Rg8 22. Nf3 Rxg3 23. Nd2 Rg1+ 24. Nf1 Bh3 25. Ke1 Bh4+ 26. Kd2 Bxf1 27. Bf3 Rg3 28. Bh5+ Kf6 29. Ke1 Bg2 30. Kf2 Rg5+ 31. Ke3 Rxh5 32. c4 Re5+ 33. Kd4 Bxd5 34. c5 dxc5+ 35. Kxc5

[Assistant] Bc6+


[System] You are a 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 e6 3. Bg2 d5 4. O-O c5 5. c4 Be7 6. cxd5 exd5 7. Nc3 d4 8. Na4 O-O 9. b4 cxb4 10. d3 Nc6 11. a3 b5 12. Nb2 bxa3 13. Qc2 axb2 14. Bxb2 Nb4 15. Qd2 Bb7 16. Nxd4 Bxg2 17. Kxg2 Qd5+ 18. e4 Qh5 19. h3 a5 20. Nf5 Bd8 21. Ba3 Re8

[Assistant] Bxb4


[System] You are a 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. Nf3 d5 3. e5 c5 4. d4 Nc6 5. c3 Qb6 6. Bb5 cxd4 7. Bxc6+ bxc6 8. Qxd4 c5

[Assistant] Qa4+


[System] You are a 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. h3 a6 5. Nge2 b5 6. a3 Bb7 7. g3 Nd7 8. Bg2 c5 9. dxc5 Nxc5 10. Be3 Nf6 11. O-O Ncxe4 12. Nxe4 Bxe4 13. Bxe4 Nxe4

[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] 1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4 h5 5. Bd3 Bxd3 6. Qxd3 e6 7. Bg5 Ne7 8. Nf3 a6 9. Nbd2 Nd7 10. c4 Qc7 11. O-O g6 12. g3 Nf5 13. a4 Bh6 14. Rfb1 Bxg5 15. Nxg5 dxc4 16. Nxc4 Nb6 17. Ne3 Nxe3 18. fxe3 Nd5 19. e4 f6 20. Nxe6 Qe7 21. exd5 cxd5 22. Nc5 f5

[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. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Be7 6. Bd3 Ngf6 7. Qe2 O-O 8. Neg5 h6 9. h4 c5 10. c3 cxd4 11. cxd4 Bb4+ 12. Kf1 Nb6 13. Be3 Nbd5 14. Ne5 Bd6 15. f4 Nxe3+ 16. Qxe3 Bd7 17. Rd1 Bc6 18. Qg3 Qc7 19. Rh3 Nh5 20. Qg4 Nf6 21. Qg3 Kh8 22. Bb1 a6 23. Kg1 Nh5 24. Qd3 Nf6 25. Nh7 Be4 26. Qe2 Bxh7 27. Bxh7 Bxe5 28. g4 Bxf4 29. Bb1 g5 30. hxg5 Bxg5 31. Rf1

[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] 1. e4 c5 2. Nc3 Nc6 3. Nf3 e5 4. d4 cxd4 5. Nd5 Nf6 6. c3 d6 7. cxd4 exd4 8. Nxd4 Nxe4 9. Nxc6 bxc6 10. Nc3 Nxc3 11. bxc3 Qf6 12. Be2 Qxc3+ 13. Bd2 Qe5 14. O-O Be7 15. g3 O-O 16. Bf4

[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] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 a6 6. c4 e6 7. Nc3 Be7 8. Be3 Qc7 9. Qd2 Nc6 10. Rc1 Bd7 11. Nd5 exd5 12. cxd5 O-O 13. dxc6 bxc6 14. Be2 c5 15. O-O Rab8 16. Nb3 Be6 17. Bc4 Bxc4 18. Rxc4 Rfd8 19. Qc2 Nd7 20. Bd2 Rb5 21. Rd1 Rdb8 22. Bf4 a5 23. Ra4 Rb4 24. Rxb4 Rxb4 25. Nd2 Qb6 26. Nc4 Qb5 27. b3 a4 28. Bxd6 Bf6 29. e5 Bg5 30. Rd3 axb3 31. axb3 h6 32. f4 Bxf4 33. e6 Bxd6 34. exd7 Qxd7 35. Nxd6 Rd4

[Assistant] Rxd4


[System] You are a 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: r3kr2/pp1b3p/4p1pP/q5P1/1b6/P2Q1N2/3B1P2/R3KB1R b KQq - 0 24

[Assistant] Rxf3


[System] You are a 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. c3 Nf6 3. Nd2 e5 4. Qc2 Nc6 5. e4 Be6 6. Ngf3 dxe4 7. dxe4 h6 8. Bb5 Qd7 9. Nxe5 Nxe5 10. Bxd7+ Nexd7 11. O-O O-O-O 12. Re1 Bc5 13. Nf3 Ng4 14. h3 Nxf2 15. Be3 Nxh3+ 16. gxh3 Bxe3+

[Assistant] Rxe3


[System] You are a 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 c6 4. cxd5 exd5 5. Nf3 f5 6. Bg5 Nf6 7. e3 Be7 8. Bd3 O-O 9. Qc2 Ne4 10. Bxe7 Qxe7 11. O-O Be6 12. Ne5 Nd7 13. Nxd7 Bxd7 14. Rae1 Rae8 15. f3 Nxc3 16. Qxc3 Qg5 17. f4 Qh4 18. Rf3 Rf6 19. Rh3 Qg4 20. Rg3 Qh5 21. Rg5 Qf7 22. Qd2 Rg6 23. Qf2 Rxg5 24. fxg5 Qe7 25. h4 g6 26. g3 a6 27. a3 Qd6 28. Qf4 Re6 29. Kf2

[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] 1. e4 Nc6 2. Nc3 e6 3. Nf3 Nge7 4. d4

[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. f4 g6 2. Nf3 Bg7 3. g3 c6 4. Bg2 Nf6 5. Kf1 O-O 6. Kf2 d6 7. Re1 e5 8. Kg1 e4 9. Ng5 d5 10. c4 Nbd7 11. cxd5 cxd5 12. Nc3 Nc5 13. b4 Ne6 14. Qb3 Nxg5 15. fxg5 Ng4 16. Bb2 d4 17. Nxe4 Be6 18. Qf3 f5 19. gxf6 Nxf6 20. Nxf6+ Rxf6 21. Qxb7 Rb8 22. Qxa7 Rf7

[Assistant] Qa6


[System] You are a 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 d6 2. e4 c6 3. Be2 Nd7 4. Nf3 Qa5+ 5. Nbd2 Qb6 6. Nc4 Qc7 7. Be3 e5 8. d4 Ngf6 9. dxe5 dxe5

[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] FEN: 6k1/pp3pp1/3rb3/4q2r/4P3/1P3Q1P/P1P3P1/3R1R1K w - - 3 32

[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. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 Nc6 6. Nc3 g6 7. d4 cxd4 8. Nxd4 Bg7 9. Be3 Nf6 10. f3 O-O 11. O-O a6 12. b3 Rac8 13. Rc1 h5 14. Qd3 Ne5 15. Qd2 h4 16. h3 Nh5 17. Nd5 Rce8 18. Rfd1 e6 19. Nc3 Rd8 20. Bg5 Bf6 21. Bxf6 Nxf6 22. Qf4 Kg7 23. Qxh4 Rh8 24. Qg5 Rh5 25. Qg3 Rdh8 26. Rd2 Ne8 27. Nf5+ exf5 28. Qxe5+ dxe5 29. Rxd7 Nf6 30. Rxb7 fxe4 31. Nxe4 Nxe4 32. fxe4

[Assistant] Rg5


[System] You are a 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: 4r3/1p3k1p/p1q3pP/4npB1/2Pp1Q2/5P2/P4PK1/4R3 w - - 6 27

[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] FEN: 6r1/p1p2kq1/2p2r2/5p2/5Q2/1N3p2/PPPR3P/7K w - - 1 32

[Assistant] Rd7+


[System] You are a 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. d4 g6 3. Bf4 Bg7 4. Qd2 O-O 5. Nc3 d6 6. O-O-O a6 7. Kb1 b5 8. a3 Bb7 9. d5 Nbd7 10. e4 c6 11. Be2 Rc8 12. dxc6 Bxc6 13. Bd3 Ng4 14. Nd5 Nge5 15. Nd4 Bxd5 16. exd5 Qb6 17. Be3 Qb7 18. Rhe1 Qxd5 19. f4 Nxd3

[Assistant] Qxd3


[System] You are a 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: 5rk1/2pp2pp/1p1bp3/pP5q/2P1Qn2/5R2/PB4PP/R6K b - - 3 24

[Assistant] Nd3


[System] You are a 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/p4ppp/1pQ5/3p4/3P2P1/3q1P1P/PP4K1/2R1R3 b - - 0 25

[Assistant] Re2+


[System] You are a 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: 8/8/8/p4k2/P4P1p/4K3/8/8 b - - 1 47

[Assistant] Kg4


[System] You are a 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 c5 3. Bg2 d5 4. O-O Nc6 5. d3 e6 6. c4 d4 7. Bf4 Bd6 8. Bxd6 Qxd6 9. a3 e5 10. Nbd2 O-O 11. Ng5 Bd7 12. Nge4 Nxe4 13. Nxe4 Qe7 14. b4 cxb4

[Assistant] axb4


[System] You are a 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. d3 e5 4. g3 Nf6 5. Bg2 h6 6. Nge2

[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] 1. g3 c5 2. Bg2 Nf6 3. d3 d5 4. Nf3 Nc6 5. O-O Bg4 6. c3 Bxf3 7. Bxf3 e6 8. Bg2 Be7 9. Nd2 O-O 10. Qc2 Qd7 11. Nf3 Rac8 12. e4 a6 13. e5 Ne8 14. Re1 Nc7 15. Qe2 b5 16. Bf4 b4 17. Rac1 bxc3 18. bxc3 Rb8 19. h4 Rb7 20. h5 Rfb8 21. Rc2 h6 22. Qd2 Rb1

[Assistant] Rxb1


[System] You are a 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. Nc3 d6 3. d4 g6 4. f3 Bg7 5. Be3 c6 6. g4 b5 7. h4 h5 8. g5 Nfd7 9. Nh3 b4 10. Ne2 a5 11. Nf2 d5 12. Bg2

[Assistant] e6


[System] You are a 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. Nf3 g6 4. Nc3 Bg7 5. g3 Qc7 6. h3 Nd7 7. Bg2 e6 8. O-O Ne7 9. Be3 O-O 10. Qd2 a6 11. a4 b6 12. Rad1 Bb7 13. Rfe1 Rad8 14. Kh2 c5 15. d5 exd5 16. exd5 Nf6 17. Bf4 Nexd5 18. Nxd5 Nxd5 19. Bg5 Nf6 20. b3 Rfe8 21. c4 Rxe1 22. Nxe1 d5 23. Bxf6 Bxf6 24. Bxd5 Bxd5 25. cxd5 Qe5 26. Ng2 Qd4 27. Ne3 Qxd2 28. Rxd2 Bg5 29. Kg2 Bxe3 30. fxe3 Kg7 31. Kf3 Kf6 32. e4 Ke5 33. Ke3 f5 34. exf5 gxf5 35. Kf3 Rxd5 36. Re2+ Kf6 37. Re3 Rd4 38. g4 fxg4+ 39. hxg4 a5 40. Kg3 h6 41. Kh4 Kg6 42. Re6+ Kg7 43. Rxb6 Rb4 44. Rxb4 cxb4 45. g5 Kg6 46. gxh6 Kxh6 47. Kg4 Kg6 48. Kf4 Kf6 49. Ke4 Ke6 50. Kd4 Kd6 51. Kc4 Kc6 52. Kd4 Kd6

[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] 1. b3 Nf6 2. Bb2 g6 3. Nf3 Bg7 4. d4 O-O 5. c3 Ne8 6. g3 d6 7. Bg2 Nd7 8. O-O c6 9. Nbd2 e5 10. Re1 f5 11. dxe5 dxe5 12. e4 f4 13. Qc2 Qe7 14. c4 Nc5 15. Nb1 Nf6 16. Nc3 fxg3 17. hxg3 Nh5 18. Rad1 Bg4 19. Rd3 Nxd3 20. Qxd3 Qf6 21. Nh2

[Assistant] Qxf2+


[System] You are a 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 e5 4. Bc4 Be7 5. O-O Nbd7 6. a3 h6 7. b4 c6 8. Bb2 Qc7 9. d3 Nf8 10. Ne2 Bg4 11. Ng3 g6 12. h3 Be6 13. Qe2 b5 14. Bxe6 Nxe6 15. c3 Nf4 16. Qd2 O-O 17. c4 a6 18. Rac1 Qd7 19. Rc2 h5 20. Rfc1 Rac8 21. d4 Nxh3+ 22. gxh3 Qxh3 23. dxe5 Ng4 24. exd6 Bh4 25. Qd4 Bf6 26. e5 Bh4 27. Qf4 Rce8 28. cxb5 cxb5 29. d7 Rd8 30. Rc8 Nxf2 31. Kxf2 Qxd7 32. Rxd8 Bxd8

[Assistant] Nxh5


[System] You are a 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. Nf3 d5 3. Nc3 Nf6 4. e5 Nfd7 5. d4 a6 6. Bf4 c5 7. dxc5 Nc6 8. a3 Bxc5 9. Bd3 b5 10. b4 Be7 11. O-O Bb7 12. Qe2 Qb6 13. Rad1 h6

[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 e6 2. d4 d5 3. Nd2 Be7 4. Ngf3 Nf6 5. Bd3 dxe4 6. Nxe4 Nxe4 7. Bxe4 O-O 8. Qe2

[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 d5 2. Nc3 d4 3. Nce2 Nc6 4. Ng3 e5 5. Bb5 Bd6 6. Bxc6+ bxc6 7. d3

[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] FEN: 8/5kP1/8/p3K3/3pB3/P7/7p/8 b - - 0 44

[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] FEN: 5rk1/4q1pp/5p2/p1rRpP2/1p2Q3/7P/6P1/3R3K w - - 0 33

[Assistant] Rd7


[System] You are a 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. b3 d6 3. Bb2 e5 4. d4 e4 5. Nfd2 f5 6. e3 Nf6 7. c4 Be7 8. Nc3 O-O 9. Be2 Be6 10. O-O d5 11. Bf3 exf3 12. Nxf3 Ne4 13. cxd5 cxd5 14. Ne5 Nd7 15. Ne2 Nxe5 16. dxe5 Rc8 17. Nd4 Qd7 18. a4 a6 19. Qe2 Rc7 20. Rac1 Rfc8 21. f3 Ng5 22. h4 Nf7 23. Qf2 Rxc1 24. Rxc1 Rxc1+ 25. Bxc1 Nxe5 26. Bb2

[Assistant] Nd3


[System] You are a 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. e3 Bg7 4. Nbd2 O-O 5. Be2 d6 6. 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: r3kb1r/pp2qppp/5n2/2PNn3/8/5P1P/PP3P2/R1BQKB1R b KQkq - 0 11

[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. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nc6 5. Nf3 Nf6 6. Nc3 Be6 7. c5 Qd7 8. Be3 O-O-O 9. h3 Ne4 10. Bd3 Nxc3 11. bxc3 Bf5 12. Qc2 Bxd3 13. Qxd3 f6 14. O-O e5 15. Qc2 e4 16. Nd2 g6 17. f3 f5 18. fxe4 fxe4 19. Nb3 Bg7 20. a4 Rhf8 21. Qe2 Qe7 22. Rxf8 Rxf8 23. Rf1 h6 24. Rxf8+ Qxf8 25. Qg4+ Kc7 26. Qxg6 Qf6 27. Qxf6 Bxf6 28. Bxh6 Ne7 29. Be3 Nf5 30. Kf2 Bh4+ 31. Ke2 Ng3+ 32. Kd1 Nf1 33. Ke2 Ng3+ 34. Kd1 Kd7 35. Nd2 Ke7 36. c4

[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] FEN: 4r1k1/ppq2rp1/8/3QN1Bp/3P1b2/2P1n3/PP6/R4R1K w - - 4 30

[Assistant] Qxf7+


[System] You are a 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: rnq1kbnr/pQ3ppp/4p3/5b2/8/6P1/PP1PPPBP/RNB1K1NR b KQkq - 0 7

[Assistant] Qxc1#


[System] You are a 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 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 f6 8. Nf4 Qe7 9. Qh5+ Kd8 10. Qh3 Ndxe5 11. dxe5 Nxe5 12. Bc2 Bd7 13. O-O g5 14. Ng6 Nxg6 15. Bxg6 Kc7 16. Re1 Bg7 17. Bf5 Rae8 18. Nb3 Qd6 19. Bc2 h5 20. Qg3 e5 21. Be3 b6 22. Rad1 h4 23. Qf3 Bc6 24. Bc1 h3 25. g3 Rhf8 26. Bf5 d4 27. Be4 f5 28. Bxc6 Qxc6 29. Qxc6+ Kxc6 30. Bxg5 c4 31. Nd2 b5 32. a4 a6 33. axb5+ axb5 34. Ra1 d3 35. b3 Kc5 36. bxc4 bxc4 37. Ra4 e4 38. Rxc4+ Kd5 39. Be3 Rc8 40. Rxc8 Rxc8 41. c4+ Ke6 42. f3 Bc3 43. fxe4 Bxd2 44. Bxd2 Rxc4 45. exf5+ Kxf5 46. Re3 Rc2 47. Rxd3 Ke4 48. Rd8 Kf3 49. Kf1 Ra2 50. Rf8+ Ke4 51. Rf2 Kd3 52. Be1 Ra1 53. Rf3+ Ke4 54. Rb3 Rc1

[Assistant] Rb4+


[System] You are a 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: 2kr1n1Q/1p1bbp2/pqn1p1p1/3B2P1/3P1B2/PNN5/1PP2P2/1K1R4 b - - 0 20

[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] FEN: 5nk1/R1R3p1/1p3r2/3pq3/8/6Q1/PP3PPK/8 b - - 6 39

[Assistant] Rh6+


[System] You are a 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: r1b1k2r/pp3p2/8/3pq1pp/1bp5/2N1P1PP/PPQ1B1P1/R3K2R w KQkq - 0 17

[Assistant] Qa4+


[System] You are a 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: 8/8/4p3/4Pk2/3Pp3/8/4K3/8 w - - 8 56

[Assistant] Ke3


[System] You are a 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/R1p3k1/1pPp1np1/1P4Pp/5r1P/8/8/6K1 w - - 0 41

[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] FEN: 7r/1Q3ppk/4p2p/7P/4NbP1/Pn5q/1P3P2/5RK1 w - - 1 33

[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. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Bxd2+

[Assistant] Qxd2


[System] You are a 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. d4 Nf6 5. Nf3 e6 6. Bc4 Be7 7. O-O O-O 8. Bf4 c5 9. dxc5 Qxd1 10. Raxd1 Bxc5 11. Bd3 Nc6 12. h3 Nb4 13. Rfe1 Nxd3 14. Rxd3 Bb6 15. Bd6 Re8 16. Be5 Nd5 17. Nxd5 exd5 18. Rxd5 Be6 19. Rd3 Bxa2 20. b3 Rac8 21. Ra1 Rxc2 22. Nd2 f6 23. Bc3 Rc8 24. Nc4 Bxb3 25. Nxb6 axb6 26. Rad1 R2xc3 27. Rd8+ Rxd8 28. Rxd8+ Kf7 29. Rd7+ Kg6 30. Rxb7 Rc1+ 31. Kh2

[Assistant] b5


[System] You are a 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 c5 2. Nd2 d5 3. Ngf3 Nc6 4. g3 e5 5. Bg2 h5 6. e4 dxe4 7. dxe4 Be6 8. c3 g5 9. Qe2 h4 10. Nc4 g4 11. Nxh4 Rxh4 12. gxh4 Qxh4 13. Be3 O-O-O 14. Rd1 Rxd1+ 15. Kxd1 Nf6 16. Kc2 Bg7

[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. c4 e6 3. Nc3 c6 4. e3 f5 5. Bd3 Nf6 6. Qc2 Bb4 7. Bd2 O-O 8. cxd5 cxd5 9. Nge2 Nc6 10. a3 Bd6 11. Nb5 Bb8 12. Rc1 a6 13. Nbc3 Ne4 14. f3 Qh4+ 15. g3 Bxg3+ 16. Nxg3 Nxg3 17. hxg3 Qxh1+ 18. Bf1 Qxf3 19. Ne2 Bd7 20. Qd1 Rac8 21. Rc3 e5 22. dxe5 Nxe5 23. Nd4 Qxg3+ 24. Ke2 Rxc3 25. Bxc3 f4 26. exf4 Rxf4 27. Qe1 Re4+ 28. Kd2 Qxe1+ 29. Kc2 Qxf1 30. Kb3 Qd3 31. Kb4 Rxd4+ 32. Bxd4 Qxd4+ 33. Ka5 Nc4+ 34. Kb4 Nd6+ 35. Kb3

[Assistant] Qd3+


[System] You are a 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. Bf4 b6 4. e3 Bb7

[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] FEN: 1k6/pp2bp2/2b1p3/2B1Pp2/1P3P2/P4NP1/3r1RKr/2R5 w - - 7 33

[Assistant] Kxh2


[System] You are a 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. c3 Nf6 4. Qc2 Nc6 5. Bb5 Bd7 6. h3 e5 7. O-O Be7 8. d3 O-O 9. Be3 a6 10. Ba4 b5 11. Bb3 h6 12. a4 Na5 13. axb5 Nxb3 14. Qxb3 Be6 15. c4 axb5 16. Rxa8 Qxa8 17. Nbd2 Nd7 18. Qc2 bxc4 19. dxc4 f5

[Assistant] Nb1


[System] You are a 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/pr4k1/3R3R/4r1pP/8/1p4P1/5PK1/8 w - - 1 40

[Assistant] Rdg6+


[System] You are a 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: 4r1k1/1p3ppp/p7/2b3Q1/2b4B/2P2B2/PPq2PPP/3R2K1 b - - 5 27

[Assistant] Qxd1+


[System] You are a 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. Bg5 Ne4 3. Bh4 g5 4. f3 c5 5. fxe4 gxh4 6. e3 Bh6 7. Bc4 e6 8. Nc3 Nc6 9. Nf3 h3 10. O-O Bxe3+ 11. Kh1 hxg2+ 12. Kxg2 Rg8+ 13. Kh1 cxd4 14. Nd5 exd5 15. exd5 b5 16. Bd3 Nb4 17. Bxh7 Rg7 18. Be4 Bb7 19. Nxd4 Qh4 20. Qf3 Qxe4 21. Qxe4+

[Assistant] Kf8


[System] You are a 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 a6 5. Nc3 Qc7 6. Bd3 Nf6 7. Qf3 b5 8. Bd2 Bb7 9. O-O-O d5 10. exd5 Nxd5 11. Nxd5 Bxd5 12. Qg3 Qxg3 13. hxg3 Bxg2 14. Rhg1 Bd5 15. Kb1 Nc6 16. Nxc6 Bxc6 17. Bf4 O-O-O 18. Rge1 Bc5 19. a3 Bxf2 20. Rf1 Bb6 21. Be5 f6 22. Bc3 e5 23. Bf5+ Kb7

[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: 8/1p4p1/p6p/4k3/PP4P1/4K2P/8/8 b - - 6 38

[Assistant] b5


[System] You are a 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 Bf5 3. e3 e6 4. Bd3 Nf6 5. Bxf5 exf5 6. O-O Bd6 7. c4 c6 8. cxd5 cxd5 9. Qc2 Ne4 10. Qa4+ Qd7 11. Qb3 O-O 12. Nc3 Nxc3 13. bxc3 Nc6 14. Ba3 Rfe8 15. Bxd6 Qxd6 16. Qxb7 Na5 17. Qb4 Qc7 18. Qb2 Nc4 19. Qc2 g6 20. Rfc1 Rac8 21. Nd2 Nd6 22. Nb3 Ne4 23. Qd3 Kg7 24. Rc2 Nd6 25. Nc5 Nc4 26. Rb1 Rb8 27. Rxb8 Rxb8 28. g3 Rb1+ 29. Kg2 Qe7 30. Re2 Nb2 31. Qxb1 Nc4 32. Qc1 g5 33. Qc2 Kg6

[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. d3 d5 2. g3 c6 3. Bg2 Bf5 4. Nf3

[Assistant] e6


[System] You are a 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 Nf6 4. O-O Nxe4 5. d4 Nd6 6. dxe5 Nxb5 7. a4 Nbd4 8. Nxd4 Nxd4 9. Qxd4 d5 10. exd6 Qxd6 11. Qe4+ Qe6

[Assistant] Qd4


[System] You are a 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 a6 5. Qd1 Nc6 6. Nf3 Qc7 7. e3 b6 8. Bd3 Bb7 9. O-O Ne5 10. h3

[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. d4 d6 2. c4 e5 3. dxe5 dxe5 4. Qxd8+ Kxd8 5. Nf3 f6 6. Nc3 Be6 7. e4 Nd7 8. b3 c6 9. Bb2 Kc7 10. O-O-O Nh6 11. h3 Bc5 12. Rd2 Nf7 13. Bd3 a5 14. a3 Rad8 15. Kc2 Nb6 16. Rhd1 Rd7 17. Bf1 Rhd8 18. Rxd7+ Rxd7 19. Rxd7+ Kxd7 20. Nd1 Kc7 21. Ne3 a4 22. Bd3 axb3+ 23. Kxb3 Bxe3 24. fxe3 c5 25. Bc3 Kc6 26. Ba5 Nd7 27. Kc3 Nd6 28. g4 b6 29. Bb4 cxb4+ 30. axb4 Nf8 31. Nh4 g6 32. Nf3 b5 33. c5 Nc4 34. Bxc4 bxc4 35. Nd2 Kb5 36. Nb1 Nd7 37. Na3+ Kc6 38. Nxc4 Bxc4 39. Kxc4 Nf8 40. b5+ Kd7 41. Kd5 h5 42. b6 hxg4 43. hxg4 Kc8 44. c6 Kd8 45. Kd6 Kc8 46. Ke7 Nh7 47. Kf7 Ng5+ 48. Kxf6 Nxe4+ 49. Kxe5 Nf2 50. g5 Ng4+ 51. Kf4 Nf2 52. e4 Nd3+ 53. Kg4 Ne5+ 54. Kf4 Nxc6 55. e5 Kb7 56. e6 Ne7 57. Ke4 Kxb6 58. Ke5 Kc7 59. Kf6 Kd8 60. Kf7 Nd5 61. Kxg6 Ke7 62. Kf5 Ne3+ 63. Ke5 Ng4+ 64. Kf5 Ne3+ 65. Ke4 Ng4 66. Kf4 Nf2 67. Ke5 Nd3+

[Assistant] Kf5


[System] You are a 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. g3 Nf6 4. Bg2 Bb4 5. e3 Bxc3 6. bxc3 O-O

[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. d4 d5 2. Nf3 e6 3. e3 c5 4. b3 Nf6 5. Bb2 Nc6 6. Bd3 Bd6 7. O-O O-O 8. Nbd2 Qe7 9. Ne5 cxd4 10. exd4 Ba3 11. Qc1 Bxb2 12. Qxb2 Bd7 13. a3 Rfc8 14. c4 dxc4 15. bxc4 Nxe5 16. dxe5 Ng4 17. h3 Nh6 18. Qxb7 Rab8 19. Qe4 g6 20. Qe3 Nf5 21. Bxf5 exf5

[Assistant] Rab1


[System] You are a 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. c3 d5 4. exd5 Qxd5 5. Nf3 e5 6. cxd4 Bb4+ 7. Nc3 exd4 8. Qxd4 Qxd4 9. Nxd4 Nf6

[Assistant] Be2


[System] You are a 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. e5 Bf5 4. Nf3 e6 5. Nbd2 Nd7 6. Nb3 Ne7 7. a4 Bg6 8. a5 a6 9. Be2 h6 10. O-O Nc8 11. c4 dxc4 12. Bxc4 Be7 13. Bd2 O-O 14. Rc1 b5 15. axb6 Ndxb6 16. Be2 Be4 17. Na5 Qd7 18. Qb3 Bd5 19. Qc2 Re8 20. Nxc6 Bxc6 21. Qxc6 Qxc6 22. Rxc6 Nd5 23. Rxa6 Ncb6 24. Rfa1 Rac8 25. g3 Rc2 26. Bb5 Rec8 27. b4 Nc4 28. Bxc4 R8xc4 29. b5 Rb2 30. Rc6 Rxd4 31. Nxd4 Rxd2 32. Rc8+ Kh7 33. Nc6 Bc5

[Assistant] Rf1


[System] You are a 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: 6k1/6p1/P5np/8/q4p2/4p3/4Q2P/2R3K1 w - - 0 43

[Assistant] Qc4+


[System] You are a 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 c6 2. d4 d5 3. Bd2 Nf6 4. Nf3 e6 5. Be2 Be7 6. O-O O-O 7. c4 Nbd7 8. Nc3 dxc4 9. Bxc4 b5 10. Bd3 a6 11. Rc1 Bb7 12. Ne4 c5 13. Nxf6+ Bxf6 14. Qc2 c4 15. Bxh7+

[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. b3 c6 2. Bb2 d6 3. d4 Nf6 4. e4 g6 5. e5 Nd5 6. exd6 exd6 7. c4 Nf6 8. Nf3 Bg7 9. Bd3 O-O 10. O-O Bg4 11. h3 Bxf3 12. Qxf3 Nbd7 13. Nc3 Qc7 14. Rfe1 Rae8 15. Kf1 Nh5 16. Rxe8 Rxe8 17. Ne2 d5 18. c5 Nhf6 19. Qf4 Qd8 20. Re1 Ne4 21. Bxe4 Rxe4 22. Qf3 f5 23. Ng3 Rxe1+ 24. Kxe1 Qe7+ 25. Qe2 Kf7 26. Qxe7+ Kxe7 27. Ke2 Kf6 28. Kd3 Ke6 29. Ne2 Nf6

[Assistant] Nf4+


[System] You are a 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. Nxd4 Nf6 5. Nc3 Qb6 6. Nb3 e6 7. Be3 Qc7 8. Bd3 d5 9. exd5 exd5 10. O-O Ng4 11. g3 Nxe3 12. fxe3 Be6 13. Nd4 O-O-O 14. Nxe6 fxe6 15. Qg4 Bc5 16. Qxe6+ Kb8 17. Nxd5 Qd6 18. Qxd6+ Rxd6

[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. d4 c6 2. Nf3 d5 3. Bg5 Nf6 4. Bh4 Bf5 5. Nbd2 Ne4 6. e3 Nd7 7. Bd3 Nxd2 8. Qxd2 Bxd3 9. Qxd3 Qb6 10. O-O e6 11. c4 f5 12. c5 Qc7 13. Bg3 Qd8 14. b4 Be7 15. a4 a6 16. b5 O-O 17. bxc6 bxc6 18. Rab1 Bf6 19. Rb7 Re8 20. Rfb1 g6 21. h3 e5 22. dxe5 Nxe5 23. Nxe5 Bxe5

[Assistant] Bxe5


[System] You are a 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: 8/1Q6/5p1k/4p1p1/3b4/P4P2/1P5r/1K6 b - - 0 39

[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. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d3 d6 6. Nbd2 Nbd7 7. e4 e5 8. c3 Qe7 9. Qc2 a5 10. a4 h6 11. b3 Nh7 12. Bb2 f5 13. Rae1 Ng5 14. Nxg5 Qxg5 15. Nf3 Qf6 16. exf5 Qxf5 17. c4 Nc5 18. Rd1 Qf7 19. d4 Bf5 20. Qc3 Ne4 21. Qc1 Bg4 22. Rd3 exd4 23. Bxd4 Bxd4 24. Nxd4 Nc5 25. Re3 Kg7 26. Qc3 Qf6 27. h3 Bd7 28. Nb5 Bxb5 29. Qxf6+ Kxf6 30. axb5 Rae8 31. b6

[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] 1. e4 g6 2. d4 Bg7 3. Nc3 Nh6 4. Be3 f6 5. h3 O-O 6. g4 Nf7 7. Bg2

[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] FEN: 2r3k1/p4p2/bp3qp1/2rP1p1p/2P2Q2/6N1/P4PP1/2RR2K1 w - - 3 24

[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] FEN: 2R5/pp3kBp/8/8/5q2/6R1/PK2b2P/8 w - - 1 33

[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] FEN: 4rrk1/pbpn2pp/1p1b4/3p4/3P4/1P1B1N1n/PBQN2P1/6RK b - - 0 25

[Assistant] Nf2#


[System] You are a 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 Qd6 4. d4 Nf6 5. h3 Bf5 6. Nf3 Nc6 7. Bd3 e6 8. Bxf5 exf5 9. Qe2+ Be7 10. Be3 O-O-O 11. O-O-O Rhe8 12. Qd2 h6 13. Bf4 Qd7 14. Ne5 Nxe5 15. dxe5 Qxd2+ 16. Rxd2 Nh5 17. Rxd8+ Rxd8 18. g3 Nxf4 19. gxf4 g5 20. Rd1 Rxd1+ 21. Kxd1 gxf4 22. Ne2 Bg5 23. f3 f6 24. exf6 Bxf6 25. b3 Bg5 26. Nd4 b6 27. Nxf5 c5 28. Ng7 Kb7 29. Ne6 Ka6 30. Nxg5 hxg5 31. Kd2 Kb5 32. c3 a5 33. a4+ Kc6 34. Kd3 Kd5 35. c4+ Ke5 36. Kc3 Kf5 37. Kd3 Ke5 38. Kc3 Kf5 39. Kd3 Kg6 40. Ke4 Kh5 41. Kf5 Kh4 42. Kg6 Kxh3 43. Kxg5 Kg3 44. Kf5 Kxf3 45. Ke5 Ke3 46. Kd5 f3 47. Kc6 f2 48. Kxb6 f1=Q 49. Kxc5 Qb1 50. Kb5 Qxb3+ 51. Kxa5 Qxc4 52. Kb6 Qc8 53. a5 Qa8 54. a6 Kd4 55. a7 Kc4 56. Ka6 Kc5 57. Ka5 Kc6 58. Ka6 Qb7+ 59. Ka5 Qxa7+ 60. Kb4 Qc5+ 61. Kb3 Qd5+ 62. Kb2 Qc4 63. Ka3 Kd5 64. Kb2 Kd4 65. Ka3 Qb5 66. Ka2 Kd5 67. Ka1 Kd6 68. Ka2 Kd5 69. Ka1 Kc4 70. Ka2 Kc3

[Assistant] Ka3


[System] You are a 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/pb2ppbp/5np1/3p4/5P2/2N1B3/PPPQB1PP/R4RK1 b - - 2 12

[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 e5 2. Nf3 d5 3. Bc4 dxc4 4. O-O Bd6 5. d3 cxd3 6. Qxd3 Nf6 7. c4 O-O 8. Nc3 Nc6 9. Nd5 Nxd5

[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. d4 d5 2. c4 Nf6 3. Nc3 e6 4. Bg5 Be7 5. e3 O-O 6. cxd5 exd5 7. Nf3 c6 8. h3 Bf5 9. Bd3 Bg6 10. Bxg6 hxg6 11. O-O Nbd7 12. a3 Bd6 13. b4 Re8 14. Rb1 a5 15. Qb3

[Assistant] axb4


[System] You are a 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: 1k1r3r/ppp1nqb1/2P5/1P3p1p/Q3pp2/2NP3P/P3BPP1/1R3RK1 w - - 0 25

[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 c5 2. Nf3 cxd4 3. c3 Nc6 4. cxd4 d5 5. Bg5 Bg4 6. Ne5 Bf3 7. Nxf3 h6 8. Bh4 Qb6 9. Nbd2 Rc8 10. e3 Nb4 11. Bg3 Nc2+ 12. Ke2 Qa6+ 13. Nc4 Qxc4+ 14. Kd2 e5 15. Bxc4 Bb4+ 16. Kxc2 Rxc4+ 17. Kb1 e4

[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. d4 d6 2. c4 g6 3. Nf3 Bg7 4. Nc3 Nf6 5. Bg5 O-O 6. e3 c6 7. Be2 Qa5 8. Qc2 Bg4 9. Bh4 Nbd7 10. O-O Rac8 11. h3 Bf5 12. e4 Be6 13. d5 cxd5 14. cxd5 Bxd5 15. exd5 Nxd5 16. Rac1 Nf4 17. Bxe7 Rfe8 18. Bxd6 Nxe2+ 19. Kh1 Nxc3 20. bxc3 Rxc3 21. Qd2 Rxc1

[Assistant] Qxa5


[System] You are a 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/p3p3/5p2/1P1PpPk1/4P2p/5B2/6K1 b - - 1 47

[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] FEN: 2rqrbk1/1b1n1p2/pp1ppn1Q/6N1/2PP4/2NB3P/PP3PP1/R3R1K1 w - - 3 17

[Assistant] Bh7+


[System] You are a 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 e6 3. Bg2 Be7 4. d3 O-O 5. O-O b6 6. Nbd2 Bb7 7. e4 d6 8. Re1 Nbd7 9. b3 e5 10. Bb2 Re8 11. a4 Nf8 12. Nc4 a6 13. Ne3

[Assistant] b5


[System] You are a 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. g3 d5 3. Bg2 Nf6 4. O-O Bg4 5. d3 Bxf3 6. Nd2 Bxg2 7. Kxg2 e6 8. e3 Nbd7 9. Qe2 Be7 10. b3 Ne5 11. Bb2 Ng6 12. d4 Bd6 13. c4 O-O 14. Rfd1 Re8 15. Rac1 Qe7 16. c5 Bc7 17. b4 e5 18. b5

[Assistant] exd4


[System] You are a 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: 8/8/2p3k1/5p2/2PP1K2/8/8/8 w - - 2 62

[Assistant] Ke5


[System] You are a 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. h4 Nf6 2. Nh3 e5 3. g3 d5 4. Bg2 Nc6 5. O-O Bd6 6. d3 e4 7. dxe4 dxe4 8. Nc3 Bg4 9. Bg5 Qd7 10. Kh2 h6 11. Bxf6 gxf6 12. Nxe4 O-O-O 13. Nxf6 Qf5 14. Nxg4 Qxg4 15. e3 Qxh4 16. Qf3 Rhg8 17. Rad1 Ne5 18. Qf5+ Kb8 19. Qe4 Ng4+ 20. Kg1

[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] 1. e4 Nf6 2. Nc3 d5 3. g3 dxe4 4. Nce2 Nc6 5. Bg2 h5 6. h4 Bg4 7. f3 exf3 8. Nxf3 Qd6 9. O-O O-O-O 10. d4 e5 11. c3 e4 12. Ng5 Bxe2 13. Qxe2 Qxg3 14. Bf4 Qg4 15. Nxf7 Qxe2

[Assistant] Nxd8


[System] You are a 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: 1r4k1/5p2/p2p3p/3Nr1p1/8/1P4PP/P1P3P1/3R2K1 w - - 1 28

[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] FEN: 8/3b4/p1p3k1/PpPp1pq1/1P1P1Q2/4PB2/5K2/8 w - - 31 69

[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] 1. g3 d5 2. Bg2 c6 3. d3 Nf6 4. Nd2 e6 5. e4 Nbd7 6. f4 Be7 7. Ngf3 O-O 8. O-O Bc5+ 9. Kh1 Ng4 10. Qe2 Ne3 11. Nb3 Nxf1 12. Nxc5 Nxg3+ 13. hxg3 Nxc5 14. Be3 Na4 15. Rb1 b6 16. e5 c5 17. Ng5 h6 18. Nh3 Bb7 19. Nf2 Qd7 20. Bd2 b5 21. Qh5 d4 22. Ne4 c4 23. b3 Nb6 24. bxc4 bxc4 25. Bb4 Rfc8 26. Bd6 cxd3 27. cxd3

[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. g3 d5 2. Bg2 c6 3. c4 Nf6 4. cxd5 cxd5 5. Nf3 g6 6. O-O

[Assistant] Bg7


[System] You are a 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. Nd2 c6 4. Bd3 Nbd7 5. c3 e5 6. Ngf3 Be7 7. Qe2 O-O 8. O-O exd4 9. cxd4 Re8 10. Re1 Bf8 11. a3 d5 12. e5 Nb6 13. Nf1 Nfd7 14. b3 c5 15. dxc5 Nxc5 16. Bc2 d4 17. b4 d3 18. Qe3 dxc2 19. bxc5 Nc4 20. Qc3 Be6 21. Qxc2 Bxc5 22. Ng3 Rc8 23. Ne4 Bb6 24. Qb1 Qe7 25. Nfg5 g6 26. Nf6+ Kg7 27. Nxe8+ Qxe8 28. Qc2 Ne3 29. Qe2 Nc2 30. Be3 Nxa1 31. Rxa1 Qc6 32. h4 h6 33. Nf3 Bg4 34. Re1 Bxf3 35. Qxf3 Qxf3 36. gxf3 Bxe3 37. fxe3 Rc6 38. f4 Ra6 39. Ra1 b5 40. Kf2 Ra4 41. Kf3 b4 42. e6 Rxa3 43. Rd1 fxe6 44. Rd7+ Kf6 45. Rb7 b3 46. e4 e5 47. Kg4 exf4 48. Kxf4 Ke6 49. e5 Kd5 50. Rd7+ Ke6 51. Rd6+ Kf7 52. Rc6 Ra4+ 53. Kf3 Rb4 54. Rc7+ Ke6 55. Rc1

[Assistant] b2


[System] You are a 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 Nf6 3. g3 d5 4. exd5 Bg4 5. Nge2 Bf3 6. Rg1 Nxd5 7. d3 Nc6 8. Bg2 Bxg2 9. Rxg2 Be7 10. Rg1 O-O 11. Bd2 f5 12. Nxd5 Qxd5 13. Nc3 Qe6

[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: r2q1b1r/1pNbkppp/4p3/p2pP3/5n2/5Q2/PP3PPP/R1R3K1 w - - 0 19

[Assistant] Qa3#


[System] You are a 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 g6 5. g3 Bg7 6. Nb3 Nf6 7. Bg2 O-O 8. O-O d6 9. e4 Bg4 10. f3 Be6 11. Rb1 d5 12. Nc5 Qb6 13. Na4 Qb5 14. Nxe6 fxe6 15. Nc3 Qb6+ 16. Kh1 Rad8 17. Qe1 d4 18. Na4 Qb5 19. b3 e5 20. c4 Qb4 21. Qxb4 Nxb4 22. Ba3 a5 23. Nb2 Nd7 24. Bxb4 axb4 25. Nd3 b6 26. Bh3 Nc5 27. Nxb4 Kh8 28. Rbd1 Bh6 29. Nd3

[Assistant] Nxd3


[System] You are a 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: 1R6/5p1k/p5pp/4Q3/8/P1P1p3/1PK1NqP1/4r3 b - - 1 52

[Assistant] Rxe2+


[System] You are a 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. Nf3 Nf6 4. O-O g6 5. d3 Bg7 6. c4 O-O 7. cxd5 cxd5 8. Nc3 Nc6 9. Qb3 Qb6 10. Qc2 e6 11. Be3 Qd8 12. Bc5 Re8 13. b4 b6 14. b5 bxc5 15. bxc6 Qd6 16. Na4 Bf8 17. Rac1 Qxc6 18. Nxc5 Bd7 19. Ne5 Qd6 20. Ncxd7 Nxd7 21. Nxd7 Qxd7 22. e4 dxe4 23. dxe4 Rad8 24. Rcd1 Qb5 25. Rfe1 Qa5 26. Bf1 Rxd1 27. Rxd1 Qa3 28. Bc4 a5 29. Bb3 Bb4 30. e5 Bf8 31. Rd7 Re7 32. Rd8 Kg7 33. Kg2 Qb4 34. Qe2 Qd4 35. Rd5 exd5 36. Qf3 Qxe5 37. Bxd5 Rd7 38. Ba8 Bb4 39. Bc6 Rd2 40. Kh3 Bc5 41. Qg4 Rxf2 42. Bg2 Qf5 43. Qxf5 Rxf5 44. Bd5 Re5 45. Bb3 Re2 46. Bc4 Re3 47. Bb3 Kf6 48. Bc4 Kg5 49. Bb5 f5 50. Be8 h6 51. Kg2 f4 52. Kf1 fxg3 53. Bd7 gxh2 54. Kg2 Re2+

[Assistant] Kh1


[System] You are a 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: 1qr3k1/5ppp/Q2p4/1r1Pp1P1/1b3P1P/4B3/PPP1R3/1K1R4 b - - 0 25

[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. e3 d5 2. b3 Nf6 3. h3 Nc6 4. Bb2 e5 5. Nc3 Bb4 6. Nf3 d4 7. exd4 exd4 8. Ne2 Qe7 9. a3 Bc5 10. b4 Bb6 11. d3 Bf5 12. Qd2 O-O-O 13. O-O-O a5 14. b5 Ne5 15. Nfxd4 Bxd4 16. Nxd4 Be6 17. Nxe6 Qxe6 18. Qxa5 b6 19. Qa8+ Kd7 20. Qa4 Ra8 21. Qb4 Rhb8 22. f4 Ng6 23. Qd4+ Qd6 24. Qxd6+ cxd6 25. g3 Ra5 26. Bg2 Rxb5 27. Bxf6 gxf6 28. Rhe1 Ra8 29. f5 Ne5 30. Bxa8 Ra5 31. Rxe5 fxe5 32. Be4

[Assistant] Rxa3


[System] You are a 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 d6 3. d4 Nf6 4. Bd3 g6 5. Nf3 Bg7 6. O-O O-O 7. h3 Qc7 8. Re1 b6 9. Bf4 Bb7 10. Nbd2 Nbd7 11. Bh2 Rfd8 12. e5 Ne8 13. exd6 Nxd6 14. Rxe7 Re8 15. Rxe8+ Rxe8 16. Nc4 Bf8 17. dxc5 Nxc5 18. Bxd6 Bxd6 19. Bxg6 hxg6 20. Qxd6 Qxd6 21. Nxd6 Re2 22. Nxb7 Nxb7 23. Rb1 Nc5 24. Nd4 Rd2 25. Kf1 Nd3 26. f3 Rf2+ 27. Kg1 Rxb2 28. Rxb2 Nxb2 29. Kf2 Nd1+ 30. Ke2 Nxc3+ 31. Kd3 Nxa2 32. Nc6 a5 33. Kc2

[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] 1. Nf3 d5 2. g3 c5 3. Bg2 Nf6 4. O-O Nc6 5. c4 Bf5 6. cxd5 Qxd5 7. Nc3 Qd7 8. Qa4 e6 9. e4 Bg6 10. Rd1 Nd4 11. Qxd7+ Nxd7 12. Ne5 Nxe5 13. f4 Nd7 14. f5 exf5 15. exf5 Bxf5 16. Bxb7 Rb8 17. Re1+ Be7 18. Nd5 Rxb7

[Assistant] Nxe7


[System] You are a 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. exd5 cxd5 4. d4 Nc6 5. Bd3 Bg4 6. h3 Bh5 7. c3 e6 8. Bf4 Bd6 9. Bxd6 Qxd6 10. Nbd2 Nge7 11. O-O Bg6 12. Nb3 O-O 13. Nc5 b6 14. Nb3 a5 15. Qe2 a4 16. Nbd2 a3 17. b3 Rfc8 18. Rac1 Na5 19. Rfd1 Rab8 20. Ne5 Bxd3 21. Qxd3 b5 22. f4 f6 23. Ng4 h5 24. Ne3 Kf7

[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. d4 Nf6 2. Nf3 d6 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. c4 Nbd7 7. Nc3 c6 8. e4 Qc7 9. Ne1 e5 10. d5 c5 11. Nd3 a6 12. a3 Ne8 13. Be3 f5 14. f3 Nef6 15. Qd2 Rf7 16. Rac1 Nf8 17. Ne2 b6 18. b4 Bd7 19. bxc5 bxc5 20. Rb1 Qd8 21. Rb2 Bc8 22. Rfb1 f4 23. Bf2 g5 24. Rb8 Rxb8 25. Rxb8 Qc7 26. Rb2 h5 27. Qc3 g4 28. gxf4 exf4 29. Qd2 Ng6

[Assistant] Nexf4


[System] You are a 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. Bxc6 dxc6 5. O-O Qd6 6. d4 exd4 7. e5 Qg6 8. Qxd4 Bg4 9. Qf4 Bxf3 10. Qxf3 O-O-O 11. Nc3 Ne7 12. Bf4 Nd5 13. Ne4 Qf5 14. Bg3 Qxf3 15. gxf3 Be7 16. a3 Rhe8 17. c3 Bf8 18. c4 Nb6 19. Rad1 Rxd1 20. Rxd1 Nxc4 21. Rb1 Nxe5 22. Kg2 h6 23. f4 Nc4 24. Nc3 Bc5 25. Na4 Ba7 26. Nc3 f5 27. h4 h5 28. Nd1 Rd8 29. Nc3 Rd2 30. Na4 Ne3+ 31. Kf3 Ng4 32. Rf1 Bd4 33. b4 b5 34. Nc5 Bxc5 35. bxc5 Rd3+ 36. Kg2 Rxa3 37. Re1 Rc3 38. Re8+ Kb7 39. Rg8 a5 40. Rxg7 a4 41. Rg5 a3 42. Rxf5 a2 43. Rxh5 a1=Q 44. f5 Qe1 45. f6 Rxg3+ 46. Kxg3 Qxf2+ 47. Kxg4 Qxf6 48. Rg5 Qd4+

[Assistant] Kh5


[System] You are a 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: 1k4r1/pp6/8/Q1bPp2p/4PpP1/5P1P/PP3q2/K1R5 w - - 8 30

[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] FEN: 2R5/pp2pk2/5b2/1q2p3/4P1Q1/2P5/PP5r/2K5 w - - 11 39

[Assistant] Qg8#


[System] You are a 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 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2 Qe7 6. d3 Nf6 7. Nc3 c6 8. Bg5

[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] FEN: 2rqr3/3nkp2/p2bpn1Q/1b1pN3/1p1P4/6RP/PP2NPP1/1BB3K1 w - - 1 26

[Assistant] Ng6+


[System] You are a 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/p2n2P1/8/2pp4/5R2/B1P4P/PP2q3/3n2RK w - - 1 39

[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. b3 f5 2. Bb2 Nf6 3. Bxf6 exf6 4. g3 g6 5. Bg2 Qe7 6. e3 Bg7 7. Ne2 O-O 8. d3 d6 9. Nd2 c6 10. O-O Nd7 11. c4 Nc5 12. Rc1 Nxd3 13. Rc3 Nc5 14. Nf3 Ne4 15. Rd3 Be6 16. Nfd4 Bf7 17. Qc1 Rab8 18. b4 Rbd8 19. Rfd1 Rfe8 20. a4 Bh6 21. b5 c5 22. Nb3 b6 23. Nf4 g5 24. Nd5 Bxd5 25. Rxd5 f4 26. Bxe4 Qxe4 27. Nd2 Qg6 28. e4 fxg3 29. hxg3 g4 30. Qc2 Re5 31. Qd3 Rxd5 32. Qxd5+ Kg7 33. Nf1 f5 34. exf5 Qf6

[Assistant] Nh2


[System] You are a 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: rnbq1rk1/2p3bp/1p1p2p1/p1nPppN1/2P1P3/2N1B1PP/PP1Q1PBK/R4R2 b - - 1 15

[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. c4 e6 2. Nc3 d5 3. Nf3 Nf6 4. d4 Be7 5. cxd5 O-O 6. dxe6 Bxe6 7. e4 c6 8. e5 Nd5 9. Bd3 h6 10. O-O Bg4 11. Re1 Nd7 12. Nxd5 cxd5 13. h3 Bh5 14. g4 Bg6 15. Bxg6 fxg6 16. Qd3 Nb6 17. Kg2 g5 18. Bd2 Nc4 19. Bc3 Qd7 20. b3 Nb6 21. e6 Qd6 22. a3 Qf4 23. Bb4 Bxb4 24. axb4 Rae8 25. Qe3 Qf6 26. Rac1 Nc8 27. Rc7 Nd6 28. Rd7 Ne4 29. Rxb7 Rxe6 30. Rc7 Rfe8 31. Rc2 Nc5 32. Ne5 Nd7 33. Rce2 Nxe5 34. dxe5 Qe7 35. Qf3 Qxb4 36. Qxd5 Qf4

[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] 1. d4 d5 2. c4 dxc4 3. e4 e5 4. Nf3 exd4 5. Bxc4 Bb4+ 6. Nbd2 Nf6 7. O-O O-O 8. a3 Bxd2 9. Nxd2 Nc6 10. b4 Ne5 11. Bb3 Bg4 12. f3 Bh5 13. Bb2 Nd3 14. Qc2 Nxb2 15. Qxb2 Qd6 16. Rac1 Rad8 17. Nc4 Qf4 18. Qd2 Qxd2 19. Nxd2 c6 20. h4 h6 21. Kf2 Bg6 22. Bc4 Nd7 23. Nb3 Ne5 24. Rfd1 d3 25. Nc5 d2 26. Rc2 Nxc4 27. Rxc4

[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 f5 2. e3 e6 3. Nf3 d5 4. g3 c6 5. Bg2 Nf6 6. O-O g6 7. b3 Bg7 8. Bb2 O-O 9. Nbd2 b6 10. c4 Bb7 11. Ne5 Nbd7 12. Ndf3 Ne4 13. Nxd7 Qxd7 14. Ne5 Qc7 15. f3 c5 16. fxe4 cxd4 17. Bxd4 dxe4 18. Ng4 e5 19. Bb2 fxg4 20. Qxg4 Rxf1+ 21. Rxf1 Qc5 22. Bxe4 Qxe3+ 23. Rf2

[Assistant] Bxe4


[System] You are a 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 c6 2. d4 d6 3. c3 Qc7 4. f4 Nd7 5. Nf3 e5 6. Bd3 Ngf6 7. O-O e4 8. Bxe4 Nxe4 9. Ng5 Nxg5 10. fxg5 Be7 11. Qh5 O-O 12. e4 g6 13. Qh6 Rfe8 14. Rf3 Bf8 15. Qh4 Bg7 16. Rh3 Nf8 17. Qxh7+ Nxh7 18. Rf3 Bg4 19. Rf4

[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 d6 2. c4 e5 3. Nf3 Bg4 4. e3 Nd7 5. Be2 Ngf6 6. O-O Be7 7. Nc3 c6 8. h3 Bh5

[Assistant] b3


[System] You are a 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 f5 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. c4 d6 7. Nc3 Qe8 8. Bg5 Nc6 9. d5 Nd8 10. dxe6 Nxe6 11. Bxf6 Bxf6 12. Rc1 a5 13. b3 Nc5 14. Nd5 Bd8 15. Nd4 Kh8 16. Qc2 Bd7 17. Rfe1 Ne4 18. e3 Qf7 19. Nf4 Nc5 20. h4 Rb8 21. Red1 b6 22. Nc6 Bxc6 23. Bxc6 Bf6 24. Bf3 Rbe8 25. Nd5 Bd8 26. a3 Ne4 27. b4

[Assistant] axb4


[System] You are a 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/p2q1ppp/Q1pbr3/4p3/B1Np4/5P2/PP1B1P1P/R1R3K1 b - - 11 19

[Assistant] Rg6+


[System] You are a 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. c4 e6 4. cxd5 exd5 5. d4 Be7 6. Nf3 O-O 7. O-O c6 8. Nc3 Nbd7 9. Rb1 b6 10. b4 Bb7 11. Qb3 Rc8 12. Bf4 Re8 13. Rfc1 Nf8 14. a3 Ne6 15. Be5 Bd6 16. Nd1 Bxe5 17. dxe5 Ne4 18. Qb2 c5 19. bxc5 N4xc5 20. Nc3 d4 21. Nb5 a6 22. Nbxd4 Nxd4 23. Nxd4 Rxe5 24. Nc6 Bxc6 25. Qxe5 Bxg2 26. Kxg2 Qd7

[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. e4 e6 2. d4 d5 3. Nd2 c6 4. e5 Bd7 5. f4 c5 6. c3 Nc6 7. Ndf3 cxd4 8. cxd4 Qb6 9. a3 Nge7 10. b4 a5 11. b5 Nb8 12. a4 Nf5 13. g4 Bb4+ 14. Kf2 Nxd4 15. Nxd4 Bc5 16. Be3 O-O 17. Ngf3 f6 18. Kg3 fxe5 19. Nxe5 Qc7 20. Bd3 Bd6 21. Rc1 Qd8 22. h4 Be8 23. h5 Nd7 24. Nxd7 Qxd7 25. Qc2 h6 26. Qd2 e5 27. Bf5 Qe7 28. fxe5 Qd7 29. exd6 Qxd6+ 30. Bf4 Qe7 31. Ne6 Rxf5

[Assistant] gxf5


[System] You are a 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. Nf3 Bg7 3. Nc3 c5 4. d5 d6 5. e4

[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 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 g6 6. Nf3 Bg7 7. c5 O-O 8. Be3 Nc6 9. h3 Bf5 10. a3 Ne4 11. Rc1 e5 12. dxe5 Nxc3 13. Rxc3 Nxe5 14. Nxe5 Bxe5 15. Bd4 Re8 16. Be2 Qf6 17. Bxe5 Qxe5 18. Re3 Qxb2 19. O-O Rxe3 20. fxe3 Qe5 21. Qd4

[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. d4 c5 2. d5 e5 3. c4 d6 4. Nc3 Be7 5. e4 Bg5 6. Nf3 Bxc1 7. Rxc1 Ne7 8. h4 Nd7 9. h5 h6 10. Be2 Nf6 11. Nh4 Bd7 12. g3 Qa5 13. Kf1 a6 14. a4 Qb4 15. Qc2 Bg4 16. Bxg4 Nxg4 17. Kg2 Qxc4 18. Qe2 Qxe2 19. Nxe2 Nf6 20. f3 Nxh5 21. b4 b6 22. bxc5 bxc5 23. Rb1 O-O 24. Rb7 Nc8 25. Nf5 Nf6 26. Rhb1 Rd8 27. a5

[Assistant] Ra7


[System] You are a 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: 3r1b1r/p4ppp/2k5/1ppN3P/2P2QP1/3KP3/PP2Bq2/R1B5 b - - 1 25

[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: 2b3k1/1p4pp/2p1p3/q3Np1P/r2PnP1Q/R6R/2P3P1/2K5 b - - 1 31

[Assistant] Rxa3


[System] You are a 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. Bc4 Nf6 3. d3 Nc6 4. Nf3 Be7 5. c3 O-O 6. Nbd2 d6 7. h3 Be6 8. Bb3 Bxb3 9. axb3 a6 10. Nf1 d5 11. Qe2 Bc5 12. g4 dxe4 13. dxe4 Qd6 14. Ng3 Qe6 15. b4 Bb6 16. g5 Ne8 17. h4 Nd6 18. h5 Qc4 19. Qxc4 Nxc4 20. Nf5 Rfd8 21. Ke2 Rd7 22. b3 Nd6 23. Nxd6 Rxd6 24. b5 Na5 25. Nxe5 Nxb3 26. Ra3 Nxc1+ 27. Rxc1 Re8 28. f4 f6 29. gxf6 gxf6 30. bxa6 bxa6 31. Ng4 Rxe4+ 32. Kf3 f5 33. c4 Bc5 34. Rb3 Kf7 35. Ne5+ Ke6 36. Rc2 Bd4 37. c5 Rd5 38. Rb7 Bxe5 39. fxe5 Rd7 40. Ra7 Kxe5 41. Rxa6 Rd3+ 42. Kf2 Rdd4 43. Rh6 Rc4 44. Rxc4 Rxc4 45. Rxh7 Kf4 46. Ke2 Rc2+ 47. Kd3 Rxc5 48. Rg7 Kf3

[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: 2r5/1R5p/pprk2p1/5p2/3p2n1/3P2N1/PPP1KPPP/2R5 b - - 7 26

[Assistant] Rxc2+


[System] You are a 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: 2Q2Bk1/q4ppp/4p3/3p4/N7/P2n1P2/6PP/7K b - - 1 30

[Assistant] Nf2+


[System] You are a 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. cxd5 e6 4. dxe6 Bxe6 5. Nc3 c5 6. e3 Nc6 7. Bb5 Qa5 8. Ne2 cxd4 9. Nxd4 Rc8 10. O-O Bc5 11. Nxe6 fxe6 12. Bc4 Nd8 13. Bb3 O-O 14. Qf3 Bd6 15. Qh3 Qe5 16. Bd2 Nc6 17. Rad1 Na5 18. Bc2

[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. b3 c6 2. Bb2 d5 3. Nc3 Nf6 4. e3 e6 5. Qe2 Be7 6. O-O-O O-O 7. f4 Nbd7 8. g4 b6 9. g5 Ne8 10. h4 Bb7 11. h5 g6 12. hxg6 fxg6 13. Qh2 Rf7 14. Bh3 Nc5 15. b4 Bc8 16. bxc5 bxc5 17. Nge2 Rb8 18. Ba1 Qb6 19. d4 c4 20. Kd2 Bb4 21. Rb1 Bxc3+ 22. Nxc3 Qxb1 23. Rxb1 Rxb1 24. Nxb1

[Assistant] Nc7


[System] You are a 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. Bf4 c5 3. e3 Nf6 4. c3 Nc6 5. Nd2 Qb6 6. Qb3 c4 7. Qxb6 axb6 8. a3 b5 9. Rc1 Bf5 10. Ngf3 h6 11. Ne5 Nd7 12. Nxd7 Kxd7 13. f3 e6 14. e4 Bg6 15. Kf2 Bd6 16. Bxd6 Kxd6 17. Be2 Rhe8 18. e5+ Kc7 19. f4 f6 20. Rhf1 fxe5 21. fxe5 Rf8+ 22. Ke3 Kd7 23. Rxf8 Rxf8 24. Rf1 Rxf1 25. Nxf1 Ne7 26. g4 Nc8 27. Bd1 Nb6 28. Ng3 Ke7 29. Kf4 Kf7 30. h4 Bd3 31. g5 hxg5+

[Assistant] Kxg5


[System] You are a 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: r1b2rk1/ppq2pp1/4p2p/4Pn2/Q1pP4/Pn3N2/3BBPPP/2R2RK1 w - - 2 18

[Assistant] Qxb3


[System] You are a 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 d6 2. Nc3 g6 3. d4 Bg7 4. Nf3 Nf6 5. e4 O-O 6. Be2 c5 7. O-O Nc6

[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. b3 d5 2. Bb2 c5 3. e3 Nc6 4. Nf3 Nf6 5. Bb5 g6 6. Ne5 Bd7 7. Bxc6 Bxc6 8. f4 Bg7 9. O-O O-O 10. d3 Qc7 11. Nd2 Nd7 12. Ndf3 Nxe5 13. Nxe5 f6 14. Nf3 e5 15. fxe5 fxe5 16. Qe1 e4 17. Bxg7 Qxg7 18. Ng5 Qe5 19. Qh4

[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] FEN: 6rk/ppp4q/2n1p2p/3p3N/3P3P/2bQ1P2/PPP5/2K3R1 w - - 0 25

[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] 1. e4 d6 2. Nc3 c6 3. Nf3 g6 4. d4 Nd7 5. Bc4 b5 6. Bb3 b4 7. Ne2 Bg7 8. Ng3 Ba6 9. c4 bxc3 10. bxc3 Qa5 11. Bd2 Ngf6 12. c4 Qc7 13. O-O O-O 14. Re1 e5 15. d5 cxd5 16. exd5 Nc5 17. Ng5 Rab8 18. N5e4 Nfxe4 19. Nxe4 Nxe4 20. Rxe4 f5 21. Re1 e4 22. Rc1 f4 23. Bc3 Bxc3 24. Rxc3 Rbe8 25. Qg4 Qf7 26. Rh3 Bc8 27. Qh4

[Assistant] Bxh3


[System] You are a 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: 3R4/5pkp/4pNp1/4P3/1b3P2/8/2K2P1r/8 w - - 0 42

[Assistant] Rg8+


[System] You are a 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. Nf3 Bg7 3. c4 c5

[Assistant] Nc3


[System] You are a 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 a6 5. Nc3 d6 6. Be3 Nf6 7. Qe2 Be7 8. O-O-O Qc7

[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. e4 a6 2. Nf3 b5 3. d4 Bb7 4. Bd3 e6 5. O-O Nf6 6. Re1 d5 7. e5 Nfd7

[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] FEN: 7k/5p2/7P/p4K2/P1B3P1/1P6/8/4r3 w - - 0 45

[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. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bc4 e6 6. f5 d5 7. exd5 Na5 8. Bb5+ Bd7 9. dxe6 Bxb5 10. exf7+ Kxf7 11. fxg6+ hxg6

[Assistant] Nxb5


[System] You are a 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: 1Q6/8/3R2p1/5pk1/1P2q3/7r/KP6/8 w - - 1 50

[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 Nc6 2. Nc3 e5 3. Nf3 Nf6 4. Bc4 Be7 5. Bb3 O-O 6. d3 d6 7. Be3 Bg4 8. h3 Bxf3 9. gxf3 Nd4 10. Bxd4 exd4 11. Nd5 Nxd5 12. Bxd5 Bg5 13. Bb3 b5 14. Qe2 a5 15. h4 Bf4 16. Bd5 Ra6 17. a3 c6 18. Ba2 Qe7 19. h5 Rc8 20. Rg1 a4 21. Qf1 Rb6 22. Qg2 Bh6 23. Qg4 Rcb8 24. f4 b4 25. Bc4 bxa3 26. bxa3 Rb1+

[Assistant] Rxb1


[System] You are a 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 f5 3. c4 Nf6 4. h3 Be7 5. g4 c5 6. g5 Ne4 7. h4 cxd4 8. exd4 Nc6 9. Nc3 Qa5 10. Bd2 Nxd2 11. Qxd2 d5 12. cxd5 exd5

[Assistant] Nge2


[System] You are a 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. e3 e6 5. Nf3 dxc4 6. Bxc4 b5 7. Bd3 Bb7 8. O-O Nbd7 9. e4 Be7 10. e5 Nd5 11. Nxd5 exd5 12. Re1 Nf8 13. Nd2 Ne6 14. Qg4 g6 15. Nf3 h5 16. Qg3 Rg8 17. h4 Qb6 18. Be3 O-O-O 19. a4 a6 20. Rec1 Kb8 21. b3 Rc8 22. Ng5 Nxg5 23. hxg5 Qd8 24. Qf4 Rf8 25. Rc2 Qd7 26. f3 Qe6 27. Rac1 Ba3 28. Rb1 Bb4 29. Kf2 Rc7 30. Qf6 Rfc8 31. Qxe6 fxe6 32. Bxg6 c5 33. dxc5 Bxc5 34. Bxc5 Rxc5 35. Rbc1 Rxc2+ 36. Rxc2 Rg8

[Assistant] Bxh5


[System] You are a 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. Bc4 d5 3. exd5 Nf6 4. Nc3 Bd6 5. Bb3 b5 6. d3 b4 7. Ne4 Nxe4 8. dxe4 O-O 9. Nf3 a5 10. a4 bxa3 11. bxa3 Bg4 12. a4 Bh5 13. O-O Nd7

[Assistant] Qd3


[System] You are a 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: 4r1k1/6pp/1p5q/7Q/7K/B4R2/P5PP/8 b - - 8 34

[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. d4 d5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. O-O O-O 6. Nbd2 b6 7. Re1 Bb7 8. Ne5 Nbd7 9. f4 c5 10. e3 Rc8 11. c3 Qc7 12. Rf1 Rfd8 13. h3 Ne4 14. Nxe4 dxe4 15. g4 f6 16. Nxd7 Qxd7 17. Kh1 f5 18. g5 cxd4 19. cxd4 Ba6 20. Rg1 Bd3 21. Bd2 Rc2 22. Bc3 b5 23. Rc1 Rxc1 24. Qxc1 Rc8 25. Qe1 Qd5 26. a3 Qb3 27. Bf1 Bxf1 28. Rxf1 b4 29. axb4 Rc4 30. Qd1 Qxd1 31. Rxd1 Bxb4 32. Bxb4 Rxb4 33. Ra1 Rxb2 34. Rxa7 Rb3 35. Re7 Rxe3 36. Rxe6 Rf3 37. d5 Rxf4 38. d6 Rf1+ 39. Kg2 Rd1 40. Kg3 Kf7 41. Re7+ Kf8 42. Re6 e3 43. Kf3 Rd3 44. Rxe3 Rxd6 45. Kf4 g6 46. Ke5 Rd7 47. Kf6 Rf7+ 48. Ke5 Re7+ 49. Kf4 Rxe3 50. Kxe3 Kf7 51. Kd4 Ke6 52. Ke3 Kd6 53. Kf4 Kd5 54. h4 Kd4 55. h5 gxh5 56. Kxf5 Kd5 57. Kf4 Ke6 58. Kg3 Kf7 59. Kh4 Kg6 60. Kg3 Kxg5

[Assistant] Kh3


[System] You are a 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. c4 Nf6 4. Nc3 O-O 5. d4 c6 6. e4 d6 7. e5 dxe5 8. dxe5 Qxd1+ 9. Nxd1 Ng4 10. f4 f6 11. h3 Nh6 12. exf6 exf6 13. Nc3 Nf5 14. Nge2 Re8 15. O-O Bf8 16. g4 Bc5+ 17. Kh2 Ne3 18. Bxe3 Rxe3 19. Rf3 Rxf3 20. Bxf3 Be6 21. b3 Nd7 22. Ne4 Be7 23. Rd1 Kf7 24. Kg3 Nf8 25. g5 f5 26. N4c3 Rd8 27. h4 Rxd1 28. Nxd1 Nd7 29. Ne3

[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. d4 d5 2. Nc3 Nf6 3. Bg5 Bf5 4. Bxf6 exf6 5. e3 Nc6 6. Nf3 Nb4 7. Rc1 g6 8. a3 Nc6 9. Bd3

[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: 1r4k1/1r4p1/2pp2Q1/p3p2R/P2q4/1Pp5/2B5/1K6 w - - 2 35

[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. d4 d5 2. Nf3 e6 3. Bg5 Be7 4. Bf4 f5 5. Bg3 Nf6 6. e3 Bd6 7. Bd3 Bxg3 8. hxg3 O-O 9. c3 h6 10. Ne5 Ne4 11. Bxe4 fxe4 12. Qe2 Nd7 13. Ng6 Rf6 14. Nh4 c6 15. Nd2 e5 16. dxe5 Nxe5 17. O-O-O

[Assistant] Nd3+


[System] You are a 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. c4 e6 4. Nc3 Ne7 5. e4 O-O 6. Be2 d5 7. cxd5 exd5 8. e5 c5 9. Bf4 cxd4 10. Nxd4 Nbc6 11. O-O

[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. d4 b6 2. c3 Bb7 3. Bg5 f6 4. Bh4 e6 5. e3 Be7 6. Bd3 Nh6

[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: 3r1rk1/1p3pp1/pR2b3/2pNb3/4P2p/5P2/PPP5/2K2B1R w - - 4 21

[Assistant] Ne7+


[System] You are a 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. d4 Bb7 3. Bd3 Nf6 4. Qe2 Nc6 5. Bg5 Nb4 6. Bxf6 Nxd3+ 7. cxd3 gxf6 8. f3 e6 9. Nh3 Be7 10. Nd2 d5 11. O-O dxe4 12. dxe4 Qxd4+ 13. Kh1 Qxb2 14. Rab1 Qe5 15. Rb5 Ba6 16. Rfb1 Bxb5 17. Rxb5 Qa1+ 18. Ng1 O-O-O 19. Rb1 Rxd2 20. Qa6+ Kb8 21. Rxa1 Bc5 22. Nh3 Rg8 23. Qf1 Bd4 24. Rb1 c5 25. a4 h5 26. a5 Kc7 27. axb6+ axb6 28. Nf4 e5 29. Nd5+ Kd7 30. Nxf6+ Ke6 31. Nxg8 f5 32. Qc4+ Kd6 33. Nf6 Kc7 34. Qd5 fxe4 35. Qd7+ Kb8 36. Ne8 Bb2 37. Qc7+ Ka8 38. Nd6 Rxd6 39. Qxd6 c4 40. Qd8+ Kb7

[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 e6 3. Nc3 Bb4 4. Nf3 b6 5. e3 Bb7 6. Bd3 Ne4 7. Qc2 Bxc3+ 8. bxc3

[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. e4 d5 2. d3 dxe4 3. dxe4 Qxd1+ 4. Kxd1 Nf6

[Assistant] Nc3


[System] You are a 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: 8/5kp1/5p2/p7/2Q2B1K/1q1P3P/8/8 b - - 3 55

[Assistant] Qxc4


[System] You are a 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 Nf6 3. Nc3 Bb4 4. Nf3 c5 5. d5 exd5 6. cxd5 d6 7. e3 O-O 8. Be2 Re8 9. O-O Bf5 10. a3 Bxc3 11. bxc3 Nbd7 12. Bd3 Bxd3 13. Qxd3 Ne5 14. Nxe5 Rxe5 15. c4 Qe7 16. Bb2 Rg5 17. f4 Rg6 18. Rf3 Re8 19. Re1 Ne4 20. Kh1 f5 21. g3 Rh6 22. Re2 Qf7 23. Rf1 Nxg3+ 24. Kg2 Nxf1 25. Kxf1 Qh5 26. Ke1 Qh4+ 27. Kd2 Qg4 28. Qc3 Rh3 29. a4 b6 30. a5 Re4 31. axb6 axb6 32. Qa3 h6 33. Qa7 Qg1 34. Qxb6 Rhxe3 35. Rxe3

[Assistant] Qxe3+


[System] You are a 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. exd4 d5 4. Nf3 Bd6 5. c4 Be6 6. cxd5 Bxd5 7. Nc3 Nf6 8. Bg5 Be6 9. Bxf6 Qxf6 10. d5 Bd7 11. Be2 O-O 12. O-O Na6 13. Rc1 Nc5 14. b4 Na6 15. a3 Rfe8 16. Bd3 Bg4 17. Ne4 Qh6 18. Nxd6 Qxd6 19. Be2 Nb8 20. Re1 Nd7 21. h3 Bh5 22. Rc4 Bg6 23. Rg4 Nb6

[Assistant] h4


[System] You are a 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. Bg5 e6 7. f4 b5 8. Qf3 Bb7 9. Bd3 Nbd7 10. O-O-O Rc8 11. Rhe1 Be7 12. h4 O-O 13. g4 b4 14. Nce2 Nc5 15. Bxf6 Bxf6 16. g5

[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. b3 d6 2. Bb2 c5 3. e3 Nc6 4. f4 a6 5. Nf3 Bg4 6. Be2 Nf6 7. O-O Qc7 8. h3

[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] FEN: r1b2rk1/pp2q1bp/3p2p1/2pNn3/4p3/PP2P2P/2PN2B1/1RB1Q1KR b - - 5 17

[Assistant] Qg5


[System] You are a 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 Bf5 4. e3 e6 5. Bd3 Bxd3 6. Qxd3 Be7 7. O-O O-O 8. c4 h6 9. Bxf6

[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. e4 e6 2. Nc3 d5 3. d4 Bb4 4. Ne2 Nc6 5. a3 Ba5 6. b4 Bb6 7. e5 Nge7 8. Na4 O-O 9. Nxb6 axb6 10. Ng3 Ng6 11. Bd3 f6 12. h4 fxe5 13. h5 Nf4 14. dxe5

[Assistant] Nxd3+


[System] You are a 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: 2r1r1k1/1b2bNp1/p3pn1p/1p6/6qB/P1N3Q1/BP3P1P/4R1K1 w - - 1 24

[Assistant] Nxh6+


[System] You are a 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. g3 c5 3. Bg2 cxd4 4. Qxd4 Nc6 5. Qd1 g6 6. Nc3 Bg7 7. Bg5 O-O 8. Nf3 Qa5 9. O-O d6 10. h3 Bd7 11. Bd2 Rac8 12. a3 Qa6 13. Re1 d5 14. e3 e5 15. Rb1 Rfd8 16. Bf1 Qb6 17. Na4 Qc7 18. Nc5 Bf5 19. g4 Nxg4 20. hxg4 Bxg4 21. Be2 e4 22. Nh2 Bxe2 23. Qxe2 Ne5 24. b4 b6 25. Nb3 Qxc2 26. Nd4 Qd3 27. Rb3 Qxe2 28. Rxe2 Nd3 29. Kg2 Bxd4 30. exd4 Rc2 31. Rc3 Nf4+ 32. Bxf4 Rxc3 33. Ra2 f6 34. Ng4 Kf7 35. Be3 Ke6 36. a4 h5 37. Nh2 a6 38. Kf1 g5 39. Ke2 Rdc8 40. Kd2 Kf5 41. Nf1 h4 42. b5 a5 43. Ra1 g4 44. Ke2

[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. e4 c5 2. c3 Nc6 3. d4 d5 4. exd5 Qxd5 5. Nf3 cxd4 6. cxd4 e5 7. Nc3 Bb4 8. dxe5 Bxc3+ 9. bxc3 Qxd1+ 10. Kxd1 Bg4 11. Be3 Nxe5 12. Be2

[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: k1r2b2/8/p7/1p1Rp1N1/1P2R2p/K6P/P4rPB/8 b - - 0 36

[Assistant] Rc3#


[System] You are a 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/pQ1n1ppp/4p3/1B6/8/8/P4PPb/RN3RK1 w kq - 0 15

[Assistant] Kxh2


[System] You are a 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: 1r1q1r1k/1b4pp/p2b4/5p2/2B1n3/3QPN2/PP3PPP/R1B2RK1 b - - 4 17

[Assistant] Nc5


[System] You are a 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: 5R2/3N2k1/8/5PK1/6P1/8/7b/5r2 b - - 0 54

[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] 1. d4 d5 2. Nf3 c6 3. c4 Nf6 4. Nc3 e6 5. Bf4 Bd6 6. Bxd6 Qxd6 7. Qc2 O-O 8. O-O-O Nbd7 9. e4 dxe4

[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] FEN: 2k2r1r/1p1q3p/pB1p1Q2/3P1N2/8/2Pn4/P5PP/1R5K w - - 1 30

[Assistant] Nxd6+


[System] You are a 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 b6 3. Bd3 Bb7 4. Nf3 f5 5. O-O Nf6 6. Nbd2 Bd6 7. Re1 O-O 8. e4 Nxe4 9. Nxe4 fxe4 10. Bxe4 Bxe4 11. Rxe4 Nc6 12. c3 Qe8 13. Qd3 Qh5 14. Bd2 Rxf3 15. Qxf3 Qxh2+ 16. Kf1 Qh1+ 17. Ke2 Qxa1 18. Rg4 Rf8 19. Qe4 Qh1

[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] FEN: 6k1/8/1pq1N1p1/p2p1p1p/4nQ1P/4P3/2r3PK/1R6 w - - 5 40

[Assistant] Nd4


[System] You are a 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 Nf6 3. g3 d6 4. Bg2 e5 5. Nf3 Nc6 6. O-O Be7 7. e3 h6 8. d4 cxd4 9. exd4 exd4 10. Nxd4 O-O 11. Qd2 Nxd4 12. Qxd4 Nd7 13. Nd5

[Assistant] Nc5


[System] You are a 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 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4 fxe4 6. Nc3 Bf5 7. Be2 Nc6 8. d5 Ne5 9. O-O O-O-O 10. Be3 Nxc4 11. Bxc4 a6 12. a4 h5 13. a5 h4 14. f3 exf3 15. Qxf3 Ne7 16. Ra3 h3 17. g4 Qg6 18. Kh1 Bxg4 19. Qf4 Bf5 20. Rg1 Qf6 21. Bxa6 bxa6 22. Qc4 Kd7 23. Qa4+ c6 24. dxc6+

[Assistant] Nxc6


[System] You are a 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: 4r1r1/pp6/4b2k/3q2p1/3p3B/4R3/PPPQ2PP/4R1K1 b - - 3 27

[Assistant] dxe3


[System] You are a 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. c3 g6 4. Bd3 Bg7 5. Nf3 O-O 6. O-O Bg4 7. h3 Bxf3 8. Qxf3 e6 9. b3 c5 10. Nd2 cxd4 11. cxd4 Nc6 12. Bb2 Rc8 13. a3 a6 14. Rac1 b5 15. Qe2 Qb6 16. b4 Ne8 17. Nb3 Nd6 18. Nc5 Rfd8 19. Bc3 Nc4 20. Ra1 a5 21. Rfb1 axb4 22. Bxb4 Ra8 23. a4 bxa4 24. Be1 Qc7 25. Bxc4 dxc4 26. Qxc4 a3 27. Bc3 Ne7 28. Rb3 Nd5 29. Rbxa3 Rxa3 30. Rxa3 Rc8 31. Bd2 h6 32. Rb3

[Assistant] Bf8


[System] You are a 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 Qd6 3. c4 c6 4. dxc6 Nxc6 5. Nf3 e5 6. Nc3 Nf6 7. d3 Be7 8. h3 O-O 9. Be2 Rd8 10. O-O Bf5 11. Nd5 Nxd5 12. cxd5 Qxd5 13. Be3 Bg6 14. a3

[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: 4r1r1/pp5k/2p3p1/5pRn/5q1Q/2P2P1P/PP3P2/6RK w - - 4 30

[Assistant] Rxh5+


[System] You are a 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 gxf6 5. e3 f5 6. c4 Nc6 7. cxd5 exd5 8. Nc3 Be6 9. Qb3 Bb4 10. a3 Bxc3+ 11. bxc3 a5 12. Bb5 O-O 13. O-O Rb8 14. Bxc6 bxc6 15. Qc2 Qe7 16. Ne5 f6

[Assistant] Nxc6


[System] You are a 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 b6 3. g3 Bb7 4. Bg2 e6 5. O-O Be7 6. c4 O-O 7. Ne1 Bxg2 8. Nxg2 d5 9. Nc3 dxc4 10. Ne3 c5 11. dxc5

[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] FEN: 5R2/p2b2r1/1ppk1p2/1P1B1p2/P1P1pP2/4P3/5K2/8 w - - 0 43

[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. d4 Nf6 2. c4 b6 3. Nc3 Bb7 4. e3 e6 5. Bd3 Bb4 6. Nf3 Bxc3+ 7. bxc3 O-O 8. O-O d6 9. Qc2 Nbd7 10. e4 a5 11. Bg5 Qc8 12. Rab1 Ne8 13. d5

[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. d4 d5 2. c4 c5 3. e3 Nf6 4. Nf3 e6 5. Nc3 Nc6 6. cxd5 Nxd5 7. Be2 Nxc3 8. bxc3 cxd4 9. cxd4 Bb4+ 10. Bd2 Bxd2+ 11. Qxd2 e5 12. O-O exd4 13. exd4 O-O 14. Bb5 Ne7 15. Rfe1 Nd5 16. Rad1 Be6 17. h3 h6 18. Bd3 Rc8 19. Ne5 Nc3 20. Rc1 Nxa2 21. Rxc8 Qxc8 22. d5

[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: 6k1/1R3p1p/4p3/2Bpb1P1/2p2qP1/8/5nB1/5QK1 b - - 5 40

[Assistant] Nh3+


[System] You are a 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. Bb5 Bd7 7. h3 Qb6 8. Bd3 e6 9. O-O Nxd4 10. Nxd4 Qxd4 11. Be3 Qf6 12. Re1 Bd6 13. Nxd5 Qg6 14. Nf4 Qg5 15. Nxe6 Qe7 16. Nxg7+ Kf8 17. Nf5 Bxf5 18. Bxf5 Re8 19. Bh6+ Nxh6 20. Rxe7 Bxe7 21. Qd2 Kg7

[Assistant] Qd4+


[System] You are a 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. d3 g6 4. c4 Bg7 5. Nc3 d6 6. Be2 Nge7 7. O-O O-O 8. Be3 h6 9. Nd5 Kh7 10. Nxe7 Qxe7 11. Nd2 f5 12. f3 g5 13. exf5 Bxf5 14. Ne4 Bg6 15. Qd2 Nd4 16. Bd1 c6 17. Bb3 Rad8 18. Rad1 d5 19. cxd5 cxd5 20. Ng3 e4 21. dxe4 Nxb3 22. axb3 dxe4 23. Qe2 exf3 24. Rxf3 Rxd1+ 25. Qxd1 Rxf3 26. Qxf3 Qb4 27. Nf5 Qe1+ 28. Qf1 Qxf1+ 29. Kxf1 Bxf5 30. Bxa7 Bxb2 31. Ke2 Be6 32. b4 Ba3 33. Bc5 b6 34. Bxb6 Bxb4 35. Kf3 Be7 36. Bd4 Kg6 37. Be3 h5 38. Kf2 Bd5 39. Kf1 Kf5 40. Kg1 g4 41. Bd2 Bd6 42. Be3 h4 43. Bf2 Be7 44. Be1 Ke4 45. Bd2 Kd3 46. Bh6 Ke2 47. Bg7 Bc5+ 48. Kh1 Kf1

[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. Nf3 Nf6 2. b3 g6 3. Bb2 Bg7 4. g3 O-O 5. Bg2 c5 6. c4 Nc6 7. O-O e5 8. Nxe5 Qc7 9. Nf3 Re8 10. d4 cxd4 11. Nxd4 Ne5 12. Nb5 Qb8 13. N1c3 a6 14. Nd6 Rf8 15. c5 Nc6 16. Nd5 Nxd5 17. Bxg7 Kxg7 18. Qxd5 f6 19. Rac1 Ne7 20. Qd2 b6 21. Bxa8 Qxa8 22. Nxc8 Qxc8 23. cxb6 Qb7 24. Rc7 Qxb6 25. Qxd7 Rf7 26. Rd1 Qb4 27. Rd4 Qe1+ 28. Kg2 Qxe2 29. Rd6 Qe4+ 30. Kg1 h5 31. Re6 Qb1+ 32. Kg2 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. d4 c6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Bd7

[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. d4 b6 2. Nf3 Bb7 3. c4 e6 4. Nc3 Nf6 5. Bg5 Be7 6. Rc1 c5 7. e3 d5 8. cxd5 exd5 9. Bb5+ Nbd7 10. Qa4 O-O 11. O-O a6 12. Bxd7 Nxd7 13. Bxe7 Qxe7 14. dxc5 bxc5 15. Qa3 Rac8 16. Rfd1 Nb6 17. Na4 Nxa4 18. Qxa4 Rfd8

[Assistant] Qf4


[System] You are a 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. Nf3 Nc6 4. Nc3 Bg4 5. g3 Qd7 6. h3 Bxf3 7. exf3

[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] 1. g3 g6 2. Bg2 Bg7 3. Nf3 Nf6 4. O-O O-O 5. d3 d6 6. c4 c6 7. Nc3 Nbd7 8. b3 Re8 9. Bb2 e5 10. Rc1 e4

[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. c4 e6 2. g3 d5 3. Bg2 Nf6 4. Nf3 Nbd7 5. O-O dxc4 6. Qc2 Nb6 7. Na3 Bxa3 8. bxa3 O-O 9. Bb2 Bd7 10. Rac1 Bc6 11. Rfd1 h6 12. d3 cxd3 13. Rxd3 Qe7 14. Rcd1 Be4 15. Ne5 Bxd3 16. Rxd3 c6 17. a4 Rad8 18. Rb3 Nxa4 19. Ba3 Qc7 20. Bxf8 Qxe5 21. Be7 Rd7 22. Bb4 Nb6 23. h3 Nbd5 24. Bd2 Nb6

[Assistant] Be3


[System] You are a 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: 3rr1k1/1p5b/p2P3p/6p1/3Q1pP1/2N1qB1P/PPP5/3R3K w - - 1 29

[Assistant] Bd5+


[System] You are a 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: r7/5kp1/Bb2p2q/3pPp2/5P1p/5R1P/P5PK/2Q5 w - - 1 32

[Assistant] Qc6


[System] You are a 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. Bg2 Be7 4. Nc3 O-O 5. d3 c6 6. Nf3 d6 7. O-O Nbd7 8. b4 a5 9. b5 Nc5 10. Ba3 Bd7 11. bxc6 Bxc6 12. Rb1 Qc7 13. Qc2 Ne6 14. Qb2 Rfd8 15. Rfc1 Qd7 16. e4 g5 17. Nd5 g4 18. Nb6 Qe8 19. Nh4 Ra6 20. Nf5 Ng7 21. Nh6+ Kh8 22. Nd5 Ngh5 23. Ne3 Bf8 24. Nhf5 Ng7 25. Nh4 Ne6 26. Qe2

[Assistant] Nd4


[System] You are a 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 cxd4 3. cxd4 d5 4. Nc3 Nf6 5. Nf3 e6 6. Bf4 g6 7. e3 Bg7 8. Bd3 O-O 9. Qd2 Nc6 10. O-O

[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] 1. Nf3 d6 2. e3 Nd7 3. d4 Ngf6 4. c4 g6 5. Nc3 Bg7 6. h4 O-O 7. h5 e5 8. d5 Nxh5 9. Rxh5 gxh5 10. e4 f5 11. exf5 Nf6 12. Bd3 e4 13. Nxe4 Nxe4 14. Bxe4 Re8 15. Qd3 Bxf5 16. Nd2

[Assistant] Bxe4


[System] You are a 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 Nc6 2. Bb2 d5 3. e3 Nf6 4. f4 Bf5

[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. Nf3 d5 2. c4 Nf6 3. b3 c6 4. Bb2 Bf5 5. e3 e6 6. Nd4 Bg6 7. f4 Be7 8. Be2 O-O 9. O-O c5 10. Nf3 Nc6 11. Ne5 Nxe5 12. fxe5 Nd7 13. cxd5 exd5 14. Nc3 Nb6 15. d4 Re8 16. Bf3 cxd4 17. exd4 Rc8 18. Rc1 Bb4 19. Nb5 a6 20. Rxc8 Nxc8 21. Na3 Bxa3 22. Bxa3 Na7 23. Bc5 Nc6 24. Qd2 h6 25. a4 Qh4 26. g3 Qh3 27. a5 Rd8 28. b4 Be4 29. Bxe4 dxe4 30. Qf2 Rd7 31. Qf4 Nxd4 32. Bxd4

[Assistant] Rxd4


[System] You are a 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. e4 Bg7

[Assistant] d4