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

[User] FEN: r3r1k1/p1p1qp2/1p4pp/4b3/2N1Q3/2P5/PP3PPP/3RR1K1 b - - 1 18

[Assistant] Bxh2+


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

[User] 1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 d6 5. O-O Nbd7 6. b3 g6 7. Bb2 Bg7 8. Nbd2 O-O 9. Re1 Qc8 10. e4 c5 11. c3 Qc7 12. Rc1 e5 13. d5 b5 14. c4 a6 15. Nh4 b4 16. f4 a5 17. f5 a4 18. Nhf3 axb3 19. axb3 Ra2 20. Qc2 Bh6 21. Ra1 Rfa8

[Assistant] fxg6


[System] You are a 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: 8/8/4k3/5p2/5Bp1/bK4P1/P7/8 b - - 2 41

[Assistant] Bd6


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

[User] FEN: 3r2Bk/pb5p/1pq5/7Q/5P2/4P3/P1P4K/3RR3 b - - 0 31

[Assistant] Qg2#


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

[User] 1. e4 c5 2. d4 Nc6 3. c3 d5 4. exd5 Qxd5 5. f4 g6 6. Nf3 Bg7 7. c4 Qd8 8. d5 Nd4 9. Nc3 Bg4 10. Be2 Nxe2 11. Qxe2 Nf6 12. O-O O-O 13. h3 Bxf3 14. Qxf3 a6 15. f5 Rb8 16. Bf4 Rc8 17. Rad1 b5 18. fxg6 hxg6 19. Be5 bxc4 20. Bxf6 Bxf6 21. Qf4 Bd4+ 22. Kh1 Qd6 23. Qg4 Rb8 24. Rd2 Rxb2 25. Rxb2 Bxc3 26. Rbf2 Bd4 27. Rf4 c3 28. Qf3 f5 29. g4 Be5 30. Rc4 Kg7 31. gxf5 Rxf5 32. Qg2 Rxf1+ 33. Qxf1 Qxd5+ 34. Kg1 Bd4+ 35. Kh2 Be5+ 36. Kg1 Bd4+ 37. Kh2 Be5+ 38. Rf4 Bxf4+ 39. Qxf4 Qd2+ 40. Kg3 Qxf4+ 41. Kxf4 c2 42. Ke5 c1=Q 43. Kd5 Qa3 44. Kc6 Qxa2 45. Kxc5 Qh2 46. h4 Qh3 47. h5 a5 48. Kc6 gxh5 49. Kd5 Qg3 50. Kc4 h4 51. Kb5 h3 52. Kxa5 h2 53. Kb5 h1=Q

[Assistant] Kb6


[System] You are a chess 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. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. Nb5 Bxe3 7. fxe3 Kd8 8. N1c3 Nge7 9. Qd2 a6 10. Nd4 d6 11. O-O-O Ne5 12. Be2 Qg5 13. h3 f6 14. g4 Qg6 15. Nf5 Nxf5 16. exf5 Qf7 17. Nd5 Bd7 18. Rhe1 Bc6 19. Nc3 Re8 20. e4 b5 21. Kb1 b4 22. Nd5 Bxd5 23. exd5 Rb8 24. Bxa6 Qd7 25. Re4 Qa4 26. Be2 Ke7 27. a3 Rb6 28. Rxb4 Rxb4 29. Qxb4 Qxb4 30. axb4 Rb8 31. c3 Kd7 32. Kc2 h6 33. Ra1 h5 34. Ra7 hxg4 35. hxg4 Rh8 36. b5 Rh2 37. Kd1 Kc8 38. b6 cxb6 39. Rxg7 Rg2 40. Ke1 Rg1+

[Assistant] Kf2


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

[User] 1. d4 Nf6 2. Bf4 d6 3. e3 g6 4. h3 Bg7 5. Nf3 O-O 6. c4 b6 7. Nc3 Bb7 8. Bd3 Nbd7 9. Bh2 Re8 10. Qc2 e5 11. dxe5 dxe5 12. Be2 e4 13. Nd4 Ne5 14. Bxe5 Rxe5 15. O-O-O Qe7 16. g4 Nd7 17. Nb3 Nc5 18. Nxc5 Rxc5 19. h4 a5 20. h5 Bc6 21. hxg6 hxg6 22. Rd5 Bxd5 23. Nxd5 Qe5 24. g5 Rd8 25. Nc3 Re8 26. Rg1 Qe7 27. Nd5 Qd6 28. Rg4 Qe5 29. Rg1 Qf5 30. Rg2 b5 31. Nc3 bxc4 32. Qa4 Qe5 33. Rg4 Rb8 34. Rxe4 Qxg5 35. Re8+ Rxe8 36. Qxe8+ Bf8 37. Ne4 Qg1+ 38. Kc2 Rf5 39. Bxc4 Kg7 40. Qd7 Qg2 41. Qd4+ Kh7 42. Bd5 Qf1 43. Nf6+ Kh6 44. Qh4+ Kg7 45. Ne8+ Kg8 46. Nf6+ Kg7 47. Ne8+ Kg8

[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 c6 2. c4 d5 3. Nc3 Nf6 4. Nf3 e6 5. Bf4 Bd6 6. Bxd6 Qxd6 7. Ne5 Qe7 8. e3 Nbd7 9. f4 Nxe5 10. fxe5 Nd7 11. c5 O-O 12. Bd3 g6 13. Qg4 f5 14. exf6 Nxf6 15. Qg3 Nh5 16. Qe5 Qg7 17. Qg5 Qf6 18. Qxf6 Nxf6 19. O-O Bd7 20. h3 Nh5 21. Kh2 Rxf1 22. Rxf1 Rf8 23. Rxf8+ Kxf8 24. g4 Ng7 25. Kg3 Ke7 26. h4 b6 27. b4 b5 28. Kf4 Kf7 29. Nd1 Ne8

[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 Nc6 2. Nc3 e5 3. Nf3 d6 4. d4 Bg4 5. d5 Nd4

[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. b3 d5 2. Bb2 c6 3. f4 Nf6 4. Nf3 g6 5. g3 Bg7 6. Bg2 O-O 7. O-O Nbd7 8. e3 Ne4 9. c3 Nec5 10. d3 f6 11. Re1 e5 12. d4 Ne4 13. fxe5 fxe5 14. Nxe5 Nxe5 15. Bxe4 dxe4 16. dxe5 Qxd1 17. Rxd1 Bxe5 18. Nd2 Bg4 19. Re1 Bf5 20. Nc4 Bg7 21. Nd6 Rad8 22. Nxf5 gxf5 23. Rad1 Rd3 24. Rxd3 exd3 25. Rd1 Rd8 26. Kf2

[Assistant] Kf7


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

[User] FEN: r5k1/1b3p1p/p3pBp1/5q1r/2Q5/P7/5PPP/2RR2K1 w - - 1 28

[Assistant] Qc8+


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bd3 e6 7. O-O b5 8. a3 Bb7 9. Kh1 Nbd7 10. f4 Qc7 11. Qe2 Be7 12. Bd2 h5 13. Rad1 h4 14. h3 Nh5 15. Be1 Nc5 16. Nf3 Nxf4 17. Qd2 g5 18. e5 dxe5 19. Qe3 Ncxd3 20. cxd3 f6 21. Ne4 Rd8 22. Bc3 Qc6 23. Rfe1 Nd5 24. Qf2 Nf4 25. Qe3 Qd5 26. d4 Qxe4 27. Qxe4 Bxe4 28. Rxe4 Kf7 29. Rde1 Rd5 30. dxe5 f5 31. R4e3 Rhd8 32. Kh2 Rd1 33. Rxd1 Rxd1 34. Nd4 g4 35. hxg4 fxg4 36. g3 Nd5

[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: 5rk1/1Q5p/p1p3p1/P1PpB3/1P1P2P1/8/3q1PKP/8 w - - 1 41

[Assistant] Qg7#


[System] You are a 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: 2r5/1b1kp1R1/pq1pNp1Q/1p1P4/4P3/7P/PP3PP1/2r3K1 w - - 10 33

[Assistant] Kh2


[System] You are a 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: 4r3/5k1p/6p1/3P4/2PQbq2/4R2P/P5P1/6K1 w - - 6 45

[Assistant] Rf3


[System] You are a chess 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 Nf6 3. f4 e6 4. Nf3 Be7 5. e4 d6 6. e5 Nd5 7. g3 O-O 8. c4 Nb6 9. d4 dxe5 10. dxe5 Qxd1+ 11. Kxd1 Rd8+ 12. Kc2 c5 13. Nc3 Nc6 14. Bg2 Nb4+ 15. Kb1 Bd7 16. a3 Nd3 17. Rd1 Nxb2 18. Kxb2

[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] FEN: 8/8/2k5/1p2p1p1/1PP1pP2/1K4P1/5P2/8 b - - 0 37

[Assistant] exf4


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

[User] 1. d4 d5 2. Nf3 e6 3. Nbd2 Nf6

[Assistant] e3


[System] You are a chess 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. g4 fxg4 3. e4 d5 4. e5 c5 5. c3 Nc6 6. Be3 Bf5 7. Qb3 Qb6 8. Nd2 Qxb3 9. Nxb3 c4 10. Nd2 e6

[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 c5 2. d4 d6 3. c3 cxd4 4. cxd4 Nf6 5. Nc3 Nxe4 6. Nxe4 g6 7. Ng3 Bg7 8. Nf3 O-O 9. Be3 Nc6 10. Qd2 a5 11. Bd3 b5 12. O-O b4 13. Bh6 Ba6 14. Bxg7 Kxg7 15. Bxa6 Rxa6 16. Qd3 Ra7 17. Rad1 Rc7 18. d5 Nb8 19. Qd4+ Kg8 20. Rc1

[Assistant] Nd7


[System] You are a chess 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 e6 4. Qe2 c5 5. c3 cxd4 6. cxd4 Nc6 7. a3 Nxd4 8. Qd1 Nf6 9. Nc3 Bc5 10. Nge2 Ng4 11. O-O Qh4 12. h3 Nf3+ 13. gxf3 Nxf2 14. Rxf2 Qxf2+ 15. Kh1 Qxf3+ 16. Kh2 Qf2+ 17. Kh1 Qf3+ 18. Kh2 Bd6+

[Assistant] Kg1


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

[User] FEN: r3r1k1/4b1p1/p4pQp/1p6/1P6/P7/1B1q1PPP/R3R1K1 w - - 3 23

[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 Nc6 2. Nc3 e5 3. Nf3 Nf6 4. Be2 Be7

[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 b6 2. d4 Bb7 3. Nc3 Nf6 4. a3 Nxe4 5. Nxe4 Bxe4 6. Nf3 Bb7 7. Bc4

[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 c6 2. Qf3 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Bc4 Nd7 7. Qh5 Ne5 8. Bb3 Ng6 9. Nf3 e5 10. d3 Be6 11. Bxe6 fxe6 12. Nh4 Qd7 13. Nxg6 Qf7 14. Nf4 exf4 15. Qxf7+ Kxf7 16. Bxf4 Bg7 17. O-O-O h5 18. g3 h4 19. h3 e5 20. Bd2 Bh6 21. g4 Bxd2+ 22. Kxd2 f5 23. gxf5 Kf6 24. Rhg1 Kxf5 25. Rg4 Rag8 26. Rdg1 Rxg4 27. Rxg4 Rh7 28. Ke3 a5 29. a3 b5 30. b4 a4 31. c4 c5

[Assistant] cxb5


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

[User] FEN: r5k1/1bpr3p/p3p1p1/1p3P2/8/2PB3q/P3Q2P/3R1RK1 w - - 0 24

[Assistant] Bc4


[System] You are a chess 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 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. d3 d5 6. O-O

[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. Nc3 Nf6 2. d4 e5 3. e4 exd4 4. Qxd4 Nc6 5. Qd1 Bc5 6. Be3 Bxe3 7. fxe3 d5 8. Nf3 dxe4 9. Qxd8+ Kxd8 10. Ng5 Ke7 11. O-O-O h6 12. Nh3 Bxh3 13. gxh3

[Assistant] Rhd8


[System] You are a chess 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. Ne2 Re8 6. a3 Bf8 7. d5 exd5 8. cxd5 d6 9. Nd4 Nbd7 10. Bb5 a6 11. Ba4 g6 12. O-O Bg7 13. Re1 Ne4 14. Nxe4 Rxe4 15. f3 Re7 16. Bd2 Nc5 17. Bc2 a5 18. b4 axb4 19. axb4

[Assistant] Rxa1


[System] You are a 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/pp1n4/2ppp3/8/3PP2q/2N1Q2P/PPP3PK/3RR3 b - - 2 24

[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. Nc3 Bb4 4. Nf3 Bxc3+ 5. bxc3 h6 6. Qc2 d6 7. e4 Nbd7 8. Bd3 e5 9. O-O O-O 10. Re1 c5 11. Bb2 b6 12. Nd2 Bb7 13. Nf1 Rc8 14. d5 Nh5 15. g3 g6 16. Ne3 Ndf6 17. a4 a5 18. Bc1 Rb8 19. Bd2 Bc8 20. Rab1 Kg7 21. Rb2 Bh3 22. Bf1 Bxf1 23. Rxf1 Qc8 24. f3 Qh3 25. Bc1 Nd7 26. Qg2 Qxg2+ 27. Rxg2 f5 28. exf5 gxf5 29. g4 Nf4 30. Nxf5+ Rxf5 31. gxf5+ Nxg2 32. Kxg2 Rh8 33. Rg1 Kf6 34. Kf2 h5 35. Rg6+ Kxf5 36. Rg7 Rd8 37. Rg5+

[Assistant] Kf6


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

[User] 1. e4 e6 2. Nf3 d5 3. e5 c5 4. b4 cxb4

[Assistant] a3


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

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Bd3 Nc6 6. Nxc6 dxc6 7. O-O e5 8. Nc3 Bc5 9. Qf3 h6 10. h3 Be6 11. Rd1 O-O 12. a3 Qe7 13. b4 Bd4 14. Bb2 Rfd8 15. Na4 Bxb2 16. Nxb2 c5 17. b5 Rd4 18. c3 Rd7 19. Bc4 Rad8 20. Bxe6 Qxe6 21. Rxd7 Rxd7 22. Rd1 Qb3 23. Rxd7 Nxd7 24. Qd3 Nb6 25. Nd1 c4 26. Qd8+ Kh7 27. Ne3 Qxb5

[Assistant] Qe7


[System] You are a chess 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. Bg5 Nf6

[Assistant] Nf3


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

[User] 1. e4 c6 2. d4 g6 3. Nf3 Bg7 4. Nc3 d6 5. Bg5 Bg4 6. Be2

[Assistant] Qb6


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

[User] FEN: 8/kp1R4/pq4PP/8/2p4Q/8/PPP5/1K4R1 b - - 0 45

[Assistant] Qxg1+


[System] You are a chess 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. c3 d5 3. Bf4 e6 4. e3 Bd6 5. Nf3 O-O 6. Bd3 h6 7. Nbd2

[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: 4rrk1/1p3pb1/p2p3P/3Q4/1q3P2/2p4P/b1P1B3/2BK2R1 w - - 0 26

[Assistant] Rxg7+


[System] You are a chess 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. g3 Nf6 3. Nc3 Bh3 4. Bxh3 e6 5. Bg2 c6 6. Qb3 Nbd7 7. Qxb7 Rb8 8. Qxc6 Rc8 9. Qa4 Be7 10. d3 O-O 11. Qd1 Nc5 12. Nf3 Ncd7 13. O-O Nc5 14. b3 Ncd7 15. Bb2 Nc5 16. Nd2 Ncd7 17. Qc2 Ne5 18. e3 Ned7 19. d4 Ne5 20. dxe5 dxe5 21. Rad1 Ng4 22. Nde4 Nxh2 23. Kxh2 f5 24. Kg1 Qe8

[Assistant] Nd6


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Bd3 Nc6 6. Nxc6 bxc6 7. O-O g6 8. c4 Bg7 9. Nc3 O-O 10. Be3 Ne8 11. Rc1 Nc7 12. Qd2

[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: 8/8/8/4k1pp/5p2/4KPPP/8/8 w - - 0 42

[Assistant] gxf4+


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

[User] 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Qe7 5. a3 Bxd2+ 6. Qxd2 a5 7. Nc3 d6 8. e4 e5 9. Bd3 Bg4 10. dxe5 dxe5 11. Qe3 Bxf3 12. Qxf3 c6 13. O-O Nbd7 14. Nd1 Nc5 15. Bc2 a4 16. Ne3 g6 17. Rfd1 O-O 18. Rd2 Ne6 19. Qe2 Rfd8 20. Rad1 Nd4 21. Qe1 Qc5 22. Bd3 Rd7 23. Nc2 Nb3 24. Re2 Rad8 25. Qc3 Nd4 26. Ree1 Nxc2 27. Bxc2 Rxd1 28. Rxd1

[Assistant] Rxd1+


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

[User] 1. d4 d6 2. e4 Nf6 3. Nc3 Nc6 4. Be3 Bg4 5. f3 Bd7 6. Qd2 e5 7. Nge2 exd4 8. Nxd4 Nxd4 9. Bxd4 a6 10. O-O-O b5 11. Be3 c5 12. Bg5 Be7 13. h4 h6 14. Bf4 Be6 15. Bxd6 b4 16. Na4 Bxd6 17. Qxd6 Qxd6 18. Rxd6 Ke7 19. Rxa6 Rxa6 20. Bxa6 Ra8 21. Bb5 c4 22. b3 c3 23. Rd1 Rb8 24. Bc6 g5 25. hxg5 hxg5 26. Nc5 g4 27. Nxe6 Kxe6 28. Kb1 gxf3 29. gxf3 Ke5 30. Ba4 Kf4 31. a3 bxa3 32. Rd3 Rc8 33. Ka2 Nh7 34. Kxa3 Ng5 35. Kb4 Nxf3 36. Rxc3 Rb8+ 37. Ka3 Ne5 38. Bc6 Nxc6 39. Rxc6 Kxe4 40. Rf6 Rb7 41. Ka4

[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. d4 c5 2. e3 e6 3. c3 Nf6 4. Nf3 d5 5. Be2 Be7 6. O-O Nc6 7. dxc5 h6 8. Nbd2 Bxc5 9. c4 Be7 10. cxd5 Nxd5 11. Nb3 Nf6 12. Bd2 Bd7 13. Rc1 Rc8 14. Bc3 O-O 15. Bxf6 a6 16. Nfd4 Bxf6 17. Nxc6 Bxc6 18. Qxd8 Rfxd8 19. Rfd1 Kf8 20. Bf3 Ke7 21. Bxc6 bxc6 22. Rxd8 Kxd8 23. Nd4 Kc7 24. Rxc6+ Kb8 25. Rxc8+ Kxc8 26. Kf1 Kc7 27. Ke2 Kb6 28. Kd3 Kc5 29. b3 a5 30. Kc3 e5 31. Nf5 e4+ 32. Kc2 Kd5

[Assistant] Ng3


[System] You are a chess 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. c4 Nc6 4. Nc3 e5 5. a3 a5 6. d3 d6 7. Be2 g6 8. O-O Nge7 9. Ne1 Bg7 10. Nc2 O-O 11. Ne3 f5 12. Ned5 Be6 13. f4 Rb8 14. g3 Bf7 15. Be3 Nxd5 16. exd5 Nd4 17. fxe5 Bxe5 18. Bxd4 Bxd4+ 19. Kg2 Qe7 20. Bf3 Rbe8 21. Qc2 Qf6 22. Rae1 Qg7 23. a4 b6 24. Nb5 Be5 25. b3 Re7 26. g4 fxg4

[Assistant] Bxg4


[System] You are a chess 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. Bd3 c5 5. c3 Nc6 6. Ngf3

[Assistant] Be7


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

[User] FEN: 2rr1bk1/1p3ppp/p3p3/1qp1PP2/3pP3/1P5R/1BP1Q1PP/4R1K1 w - - 1 23

[Assistant] Qh5


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

[User] 1. e4 g6 2. Nc3 Bg7 3. d4 c6 4. Be3 d5 5. exd5 cxd5 6. h3 e6 7. Nf3 Ne7 8. Bd3 Bd7 9. O-O Nbc6 10. Ne2 Nb4 11. c3 Nxd3 12. Qxd3 O-O 13. Ne5 Be8 14. Qd2 a6

[Assistant] Bh6


[System] You are a chess 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. g3 d5 4. c3 c6 5. Bg2 Nbd7 6. O-O Bd6 7. Nbd2 O-O 8. Re1 e5 9. e4 exd4 10. e5 dxc3 11. exd6 cxd2 12. Bxd2 Ne4 13. Bf4 Ndf6 14. Ng5 Nxd6 15. Be5 h6 16. Nf3 Nc4 17. Bc3 Ne4 18. Rxe4 dxe4 19. Nd4 c5 20. Qb3 cxd4 21. Qxc4 dxc3 22. Qxc3 Be6 23. Bxe4 Qf6 24. Qe3

[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] 1. e4 c6 2. Nc3 d5 3. d4 Nf6 4. e5 Ng8 5. f3 Bf5 6. Bd3 Bxd3 7. Qxd3 e6 8. Nge2 g6 9. h4 Bg7 10. h5 Ne7 11. h6

[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. Nc3 Nc6 3. g3 Nf6 4. Bg2 d6 5. d3 e5 6. f4 Be7 7. Nf3 O-O 8. O-O

[Assistant] Rb8


[System] You are a 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: 2r3k1/4p2p/3pPp2/2r4P/6q1/1P6/PP2Q1P1/1K2R2R b - - 2 28

[Assistant] Rc1+


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

[User] FEN: 5r2/pp1nb1k1/3ppnp1/1Pp1p1P1/P3Pq2/2N2B2/1BPPQ3/2K3Rr w - - 0 28

[Assistant] gxf6+


[System] You are a chess 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. h3 cxd4 3. Qxd4 Nc6 4. Qd1 g6 5. Nf3 Bg7 6. c4 Nf6 7. e3 O-O 8. Nbd2 d6

[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. Nf3 c6 2. c4 d5 3. e3 dxc4 4. Bxc4 e6 5. Nc3 Nf6 6. a3 Be7 7. Qc2 O-O 8. b4 Re8 9. Bb2 b6 10. h4 Ba6 11. Bf1 Bxf1 12. Kxf1 Nd5 13. Ne4 f5 14. Neg5 Bf6 15. Rc1 h6 16. Nh3 e5 17. Nhg1 Qd6 18. Qxf5 Rc8 19. Nxe5 Re8 20. Nc4 Qe6 21. Qxe6+ Rxe6 22. Nf3 a5 23. Bxf6 Rxf6 24. e4 Nf4 25. Nxb6 Ra6 26. bxa5 Rxa5 27. Nc4 Ra4 28. Rc3 Nd7 29. g3 Ne6 30. e5 Rf8 31. d4 Nc7 32. Ke2 Nd5 33. Rcc1 Rb8 34. Rhd1 Rb3 35. Rd3 Rb5 36. Nfd2 N7b6 37. f4 Nxc4 38. Nxc4 Ra6 39. Nd6 Rb8 40. Rc5 Ne7 41. d5 Rd8 42. dxc6 Rxc6 43. Rxc6 Nxc6 44. Ke3 Na5 45. Kd4 Nb7 46. Kd5 Na5 47. Ke6 Rf8 48. Ke7

[Assistant] Nc6+


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

[User] FEN: 6k1/2q2p2/Q5pp/3p4/3P4/4P1P1/Prp2PKP/2R5 b - - 1 30

[Assistant] Rb1


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

[User] FEN: r4bk1/p5pp/1p2bp2/1N1p4/8/5N2/PP3PPP/5RK1 w - - 2 24

[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. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. cxd4 d6 6. exd6 Qxd6 7. Nc3 Nc6 8. Nf3 Bg4 9. Be2 e6 10. O-O Be7 11. h3 Bh5 12. a3 O-O 13. Ne4 Qd8 14. Ng3 Bg6 15. Ne5 Nxe5 16. dxe5 Rc8 17. Bf3 Rc2 18. Ne4 Qc7 19. Re1 Rc8 20. g3 h6 21. h4 Qb6 22. Re2 Qb3 23. Rxc2 Qxc2 24. Qxc2 Rxc2 25. Nd6 b6 26. Bd1 Rc6 27. Nb5 a6 28. Nd4 Rc4 29. Nf3 Bh5 30. Kg2 f6 31. b3

[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] 1. f4 d5 2. Nf3 c6 3. e3 Bg4 4. Be2 Nd7 5. O-O e6 6. c4

[Assistant] Ngf6


[System] You are a chess 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. Nc3 Bg7 4. e4 d6 5. e5 dxe5 6. dxe5 Qxd1+ 7. Nxd1 Nfd7 8. Bf4 Nc6

[Assistant] Bb5


[System] You are a chess 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. e3 Nf6 4. Be2 Bg4 5. O-O Bxf3 6. Bxf3 Nbd7 7. c4 e6 8. cxd5 exd5 9. Nc3 Bd6 10. e4 O-O 11. e5 Nxe5 12. dxe5 Bxe5 13. Re1 Re8 14. g3 Qc7 15. Bg5 Rad8 16. Bxf6 Bxf6 17. Rxe8+ Rxe8 18. Qd3 Qb6 19. Rb1 g6 20. a3 Qb3 21. Bd1 Qb6 22. Bc2 Re7 23. b4 Qd8 24. Rd1 Qe8 25. Kg2 Kg7 26. Na4 a6 27. Nc5 Qd8 28. Rd2 Qd6 29. Re2 Qd8 30. Rxe7 Qxe7 31. Qe3 Qc7 32. Bb3 b6 33. Nd3 d4 34. Qf4 Qxf4 35. Nxf4 c5 36. bxc5 bxc5 37. Bc4 g5 38. Nd3 Be7 39. Bxa6 f5 40. Bc4 Kf6 41. a4 h6 42. a5 Bd8 43. a6 Bb6 44. f4 g4 45. Kf2 Ke7

[Assistant] Ke2


[System] You are a 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: 2rq1r2/1b1p2k1/p2Ppp1p/1p4p1/3N4/1PP3P1/1P4PP/R2QR1K1 w - - 1 23

[Assistant] Rxe6


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

[User] FEN: 8/6p1/4p1k1/p2pP2p/P2P2P1/6K1/5P2/8 w - - 0 44

[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. e4 Nc6 2. Nc3 d6 3. f4 e5 4. Nf3 Bg4 5. Bc4

[Assistant] Bxf3


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

[User] 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 c5

[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: rk6/p1R2Q2/2ppN2B/3q4/5K2/6rP/6P1/8 b - - 5 38

[Assistant] Qe5#


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

[User] 1. e4 c5 2. Nc3 e6 3. f4 a6 4. Nf3 Nc6 5. a4 d5 6. d3 Bd6 7. Be2 d4 8. Nb1 Nge7 9. O-O O-O 10. Bd2 f5 11. Na3 fxe4 12. dxe4 Ng6 13. Nc4 Bxf4 14. Bxf4 Nxf4 15. Bd3 Kh8

[Assistant] Qd2


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

[User] 1. b3 e5 2. Bb2 f5 3. Bxe5 Nf6 4. Bb2 d5 5. Nf3 Bd6 6. e3

[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 Nf6 2. c4 c6 3. Nc3 d5 4. e3 e6 5. Nf3 b6

[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: 8/1r1b2p1/1kp4p/4Q3/1P1P4/Pqn1P1P1/6P1/2K5 w - - 4 47

[Assistant] Qa5#


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

[User] FEN: 2r3k1/1p3p2/p3pPp1/3p4/3P4/r1PK3R/8/2R5 w - - 2 34

[Assistant] Kc2


[System] You are a chess 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. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. Nd2 Nbd7 10. a4 Re8 11. h3 a6 12. Nc4 Nb6 13. Na3 Bd7 14. O-O Nc8 15. Nc4 Rb8 16. Bf4 Qc7 17. a5 Bb5 18. Qb3 Bxc4 19. Qxc4 Nd7 20. Rfc1 b5 21. axb6 Rxb6 22. Rc2 Qb7

[Assistant] Ra2


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

[User] 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. Nc3 d6 6. O-O Bb6 7. h3 O-O 8. Qe2 Ne7 9. Be3 Ng6 10. Bxb6 axb6 11. Nh2 Be6 12. Bxe6 fxe6 13. f4

[Assistant] exf4


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

[User] FEN: k1b3r1/3p1RNr/p6q/1pQ4P/4P3/2PP4/PP4B1/6K1 b - - 0 29

[Assistant] Rhxg7


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

[User] 1. d4 Nf6 2. c4 c5 3. Nc3 cxd4 4. Qxd4 Nc6 5. Qd1 e5 6. Nf3 Bb4 7. g3 Bxc3+ 8. bxc3 Qa5 9. Bd2 O-O 10. Bg2 d6 11. O-O Bf5 12. Nh4 Be6 13. Qb3 Rab8 14. Nf3 Rfc8 15. Ng5 Bf5 16. e4 Bd7 17. f4 h6 18. Nh3 Nd8 19. Nf2 Ne6 20. fxe5 dxe5 21. Be3 Nc5 22. Bxc5 Qxc5 23. Rad1 Be6 24. Kh1 Bxc4 25. Qc2 Bxf1 26. Rxf1 Qxc3 27. Qe2 Qc2

[Assistant] Qe3


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

[User] 1. Nf3 d5 2. c4 e6 3. g3 c5 4. Bg2 Nc6 5. O-O Nf6 6. cxd5 exd5 7. d4 Be7 8. Nc3 O-O 9. b3 h6 10. Bb2 Bg4 11. Na4 cxd4 12. Nxd4 Nxd4 13. Qxd4

[Assistant] Bxe2


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

[User] 1. e4 c5 2. Nf3 a6 3. c3 e6 4. d4 d5 5. e5 Bd7

[Assistant] Bd3


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

[User] 1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. f3 Nbd7 5. Be3 e5 6. Nge2 b5 7. a3 a6 8. g4 Bb7 9. g5 Nh5 10. Ng3 Nf4 11. Qd2 Ne6 12. Nce2 Be7 13. h4 Qc7 14. Nf5 Bf8 15. Bh3 O-O-O 16. Kd1 Kb8 17. Kc1 g6 18. Nfg3 exd4 19. Nxd4 Nxd4 20. Bxd4 Rg8

[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 c5 2. Nf3 d6 3. Nc3 e6 4. d4 cxd4 5. Nxd4 a6 6. Be2 Nf6 7. O-O Be7 8. f4 Nbd7 9. Be3 O-O 10. Bf3 Qc7 11. Kh1 Re8 12. a4

[Assistant] Rb8


[System] You are a chess 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

[Assistant] Bg2


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

[User] 1. c4 e6 2. d4 d5 3. Nc3 c6 4. Nf3 f5 5. Bf4 Nf6 6. e3 Nbd7 7. Bd3 a6 8. O-O Be7 9. a3 O-O 10. b4 dxc4 11. Bxc4 Nd5 12. Bg3 Nxc3 13. Bxe6+ Kh8 14. Qb3 Ne4 15. Bf4 Ndf6

[Assistant] Bc4


[System] You are a chess 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 e6 3. d5 exd5 4. exd5 d6 5. Nc3 Nf6 6. Nf3 Be7 7. Be2 O-O 8. O-O Nbd7 9. a4 Re8 10. Re1 Nf8 11. Bf1 Ng6 12. h3 a6 13. Bg5 Bd7 14. a5 h6 15. Be3 b6

[Assistant] axb6


[System] You are a chess 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 Nd7 4. O-O Ngf6 5. c4 e5 6. d3 Bd6 7. cxd5 cxd5 8. Nc3 O-O 9. Bg5 h6 10. Bxf6 Nxf6 11. Nd2 Be6 12. Qa4 Qd7 13. Qxd7 Nxd7 14. Nxd5 Rac8 15. Nc3 b6 16. a3 Nc5 17. b4 Nb3 18. Nce4 Nxd2 19. Nxd2 Rc2 20. Rfd1 Rfc8 21. Ne4 Be7 22. Kf1 f5 23. Nd2 Rb2 24. Nc4 Bxc4 25. dxc4 Kh7 26. Bd5 e4 27. Rdb1 Rc2 28. Rc1 Rd2 29. e3 Bf6 30. Rab1 Bb2 31. Rd1 Rxd1+ 32. Rxd1 Bxa3 33. b5 Bc5 34. Be6 Rf8 35. Rd7 Rf6 36. Bd5 Kg6 37. Rxa7 h5 38. h4 Kh6 39. Ke2 g5 40. hxg5+ Kxg5 41. Rg7+ Rg6 42. Rc7 Rf6 43. Rh7 Rh6 44. Rd7 Rd6 45. Rc7 h4 46. gxh4+ Kxh4 47. Rg7 Kh5 48. Rg1 Rg6 49. Rd1 Rd6 50. Ra1 Kg5 51. Rg1+ Kf6 52. Rg8 Ke5 53. Re8+ Kf6 54. Rc8 Ke5 55. Kd2 Kf6 56. Kc3 Ke5

[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] FEN: 1rbqk2r/1p3ppp/p3pn2/8/1b1P4/2N2N1P/PP3PP1/R2QKB1R w KQk - 0 11

[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 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Be7 12. O-O-O Ngf6 13. Ne4 Nxe4 14. Qxe4 Nf6 15. Qe2 Qd5 16. Kb1 Qe4 17. Be3 Ng4 18. Nd2 Qf5 19. Nc4 O-O 20. Bc1 Nf6 21. f3 Qb5 22. g4 Nd5 23. Qd3 a5 24. Ne5 Nb4 25. Qxb5 cxb5 26. c3 Nd5 27. Rhe1

[Assistant] Rfd8


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

[User] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5 6. c3 b5 7. Bb3 d6 8. a4 Rb8 9. d4 Bb6 10. axb5 axb5 11. Na3 O-O 12. Nxb5 Bg4 13. Bc2 Qe8 14. h3 Bxf3 15. Qxf3 exd4 16. Nxd4 Nxd4 17. cxd4 Bxd4 18. Re1 Bxb2 19. Bxb2 Rxb2 20. Ra7 Rxc2 21. Rb1 Qxe4 22. Rbb7 Rc1+ 23. Kh2 Qxf3 24. gxf3 Nd5 25. Ra5 Rc5 26. Rxc5 dxc5 27. Rb5 Rc8 28. Rxc5 c6 29. Kg3 g5 30. h4

[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. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 g6 5. Nc3 Bg7 6. Bd2 Nf6 7. O-O-O O-O 8. f3 d5 9. exd5 Nxd5 10. Nxd5 Qxd5 11. Kb1 a5 12. a3 Bf5 13. Bd3 Rfe8 14. Be4 Bxe4 15. fxe4 Rxe4 16. Qf3 Nd4 17. Bc3 Nxf3 18. Rxd5 Bxc3 19. Nxf3 Bf6 20. Rd7 Rc8 21. h3 Kf8 22. g4 Re7 23. Rd5 b6 24. g5

[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. Nf3 Nc6 2. g3 e5 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 Qf6 6. Qd2 d5 7. Bg2 c6 8. O-O Bd6 9. c4 dxc4 10. Qc2 Ne7 11. Qxc4 O-O 12. Nc3 Qe6 13. Qa4 Bc7 14. Be3 Nf5 15. Bf4 Bxf4 16. Qxf4 Qd6 17. Qa4 Be6 18. Rad1 Qc7 19. Ne4 Rfd8

[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: 8/3b1p2/3k4/pB1p4/P2K1P2/2P5/8/8 b - - 2 38

[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. b3 d5 2. Bb2 f6 3. e3 e5 4. f4 e4 5. Ne2 Be6 6. d3 f5 7. dxe4 dxe4 8. Qxd8+ Kxd8 9. Nbc3 Nf6 10. O-O-O+ Nbd7 11. Nd4 Ke7 12. Nxe6 Kxe6 13. Bc4+ Ke7 14. Nb5 Ne8 15. Ba3+ c5 16. Nd4 Nd6 17. Ne6 Nxc4 18. Nxf8 Rhxf8 19. bxc4 Rac8 20. Rd5 Rf7 21. Rhd1 Ke8 22. Bb2 Nb6 23. Re5+ Re7 24. Rxe7+ Kxe7 25. Bxg7 Nxc4 26. Re1 Rg8 27. Bc3 Rxg2 28. h4 Rh2 29. Rg1 Nxe3 30. Rg7+ Kf8 31. Be5 Nc4

[Assistant] Rg1


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

[User] 1. c4 Nf6 2. d4 c6 3. Nc3 d5 4. cxd5 cxd5 5. Nf3 Nc6 6. Bg5 Bf5 7. Bxf6 gxf6 8. e3 Bg6 9. Bd3 e6 10. Bxg6 hxg6 11. O-O Bd6 12. h3

[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. b3 c5 2. Bb2 Nc6 3. Nf3 Nf6 4. e3 d5 5. c4 Bf5 6. cxd5 Bc2 7. Qxc2 Nb4 8. Qc4 Nbxd5 9. d4 cxd4 10. Qxd4 e6 11. Bb5+ Nd7 12. Ne5 Bb4+ 13. Kf1 O-O 14. Nxd7

[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 e6 2. Nf3 d5 3. Nbd2 Bd6 4. e4 dxe4 5. Nxe4 Be7 6. Bd3 Nf6 7. Qe2 Nc6 8. Be3 Nd5 9. O-O-O Nxe3 10. fxe3 Nb4 11. Bc4 Bd7 12. a3 Nd5 13. h4 Bc6 14. Ne5 Nf6 15. Nxc6 bxc6 16. Ng5 Qb8 17. e4 Qb6 18. d5 Rb8 19. c3 cxd5 20. exd5 Bxa3 21. Rd2 Bc5 22. Re1 O-O 23. dxe6 Qa5 24. exf7+ Kh8 25. Kc2 Qa4+ 26. Kb1 h6 27. Ne6 Ba3 28. Nxf8 Bxf8 29. Ba2 Rb6 30. Qd1 Qa5 31. Rd8 Qf5+ 32. Qc2

[Assistant] Qc5


[System] You are a chess 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 Nf6 3. exd5 Nxd5 4. Nxd5 Qxd5 5. c4 Qd6 6. Nf3 Nc6 7. Be2 Bg4 8. O-O O-O-O 9. h3 Bxf3 10. Bxf3 Nd4 11. Be2 Nxe2+ 12. Qxe2 f6 13. Re1 e5 14. Rd1 Qd3 15. Qe1 Bc5 16. a3 Qb3 17. Qe2 Rd3 18. a4 Rhd8 19. Rb1 a5 20. Rf1 R8d4 21. f4 Re4+ 22. Qf2 Bxf2+ 23. Rxf2 Rxf4 24. Re2 Qd1+

[Assistant] Re1


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

[User] 1. Nf3 d5 2. d4 c6 3. c4 e6 4. Nc3 dxc4

[Assistant] a4


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

[User] 1. b4 e5 2. Bb2 e4 3. c4 Nf6 4. a3 a5 5. b5 d6 6. Nc3 Nbd7 7. Qc2 Nc5 8. e3 Bf5 9. f4 Be7 10. Nge2 h5 11. Nd4 Qd7 12. Nxf5 Qxf5 13. Be2 O-O 14. h3 h4 15. Rg1 a4 16. g4 hxg3 17. Rxg3 Nb3 18. Nxa4 Nxa1 19. Bxa1 Ne8 20. Bg4 Qh7 21. Nc3 Bh4 22. Kf2 f5 23. Be2 Qg6 24. Nxe4 fxe4 25. Bg4 Rxa3

[Assistant] Qb2


[System] You are a 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: r1b1kb1r/pp3ppp/2nppn2/2p5/4P3/2NPBN2/PqPQBPPP/R3K2R w KQkq - 0 8

[Assistant] Rb1


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

[User] 1. Nc3 c5 2. d4 cxd4 3. Qxd4 Nc6 4. Qd1 g6 5. Nf3 Bg7 6. a3 Nf6

[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. c4 c5 2. Nf3 Nc6 3. g3 Nf6 4. Bg2 e6 5. O-O d5 6. cxd5 exd5 7. d4 cxd4 8. Nxd4 Be7 9. Nc3 O-O 10. Bg5 Bg4 11. Bxf6 Bxf6 12. Nxc6 bxc6 13. Qd2 Re8 14. e3 Rb8 15. Rac1 Qa5 16. a3 h5 17. Qc2 h4 18. Qa4 Qxa4 19. Nxa4 h3 20. Bh1 Bxb2 21. Nxb2 Rxb2 22. Rxc6 d4 23. exd4 Ra2 24. Rc3 Ree2 25. d5 Rad2 26. Rfc1 Kh7 27. Rc4 Bd7 28. Rh4+ Kg6 29. Bf3 Rxf2 30. Be4+ f5 31. Bh1 Rxh2 32. Rf1 Bb5 33. Re1 Bc4 34. Bf3 Rdg2+ 35. Bxg2 Rxg2+ 36. Kh1 Bxd5 37. Rxh3 Re2+ 38. Kg1 Rxe1+ 39. Kf2 Ra1 40. Rh8 Ra2+ 41. Ke3 Rxa3+ 42. Kf4 Rf3+ 43. Ke5 Be4 44. Rd8 Rxg3 45. Rd6+ Kg5 46. Ra6 g6 47. Rxa7 Rd3 48. Rg7 Rd5+ 49. Ke6 Kf4 50. Rxg6 Re5+ 51. Kd6 Rd5+ 52. Ke6 Ke3

[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: 2Q4q/6k1/p4pp1/1p2p1p1/1P1pP3/P4PK1/2R3P1/8 b - - 0 51

[Assistant] Qh4#


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

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Nf3 Na6 7. O-O e5 8. d5 Nc5 9. Qc2 a5 10. Bg5 h6 11. Bh4 g5 12. Bg3 Nh5 13. Nd2 Nf4 14. Rfe1 Nxe2+ 15. Rxe2 f5 16. exf5 Bxf5 17. Nde4 Qe8 18. Qd2

[Assistant] Nxe4


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

[User] 1. Nc3 Nf6 2. d4 d5 3. f3 c5 4. e3 cxd4

[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: r1b1k2r/1p2qpp1/1bnp3p/1B6/P5n1/1QPp1N2/3B1PPP/RN3RK1 w kq - 0 15

[Assistant] Bxc6+


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

[User] 1. Nf3 d5 2. c4 e6 3. cxd5 exd5 4. d4 Nf6 5. Bg5 Be7 6. e3 O-O 7. Bd3 Nbd7 8. Nbd2 h6 9. Bh4 b6 10. Rc1 Bb7 11. Bb1 c5 12. O-O Ne4 13. Nxe4 dxe4 14. Bxe7 Qxe7 15. Nd2 Nf6 16. dxc5 bxc5 17. Nc4 Rad8 18. Qb3 Nd5 19. Rfd1 Nb4 20. a3 Nd3 21. Bxd3 exd3 22. f3 Bd5 23. e4 Be6 24. Rxd3 Rd7

[Assistant] Rxd7


[System] You are a chess 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. e3 c5 4. c4 cxd4 5. exd4 Nf6 6. Nc3 Nc6 7. d5 Nb8 8. Be2 d6 9. O-O O-O 10. Bf4 e5 11. dxe6 Bxe6 12. Qxd6 Qa5 13. Qc7 Qb4 14. Rab1 Nc6 15. a3 Qb3 16. Bd1 Qxc4 17. Qxb7 Qxf4 18. Qxc6 Rac8 19. Qa4 Qc7 20. Nb5

[Assistant] Qb6


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

[User] 1. e4 d5 2. Nc3 dxe4 3. Nxe4 Qd5 4. Nc3 Qa5 5. d4 Nf6 6. Nf3 Nc6 7. Bc4 Bg4 8. Be3 O-O-O 9. Qe2 Nxd4 10. Bxd4 Rxd4 11. Bd3 e6 12. O-O-O Bb4 13. Nb1 Rd7 14. h3 Bh5 15. g4 Bg6 16. Ne5 Rd5 17. Nc4 Qxa2 18. g5 Bxd3 19. cxd3 Rxg5 20. Qc2 Rc5 21. Nc3

[Assistant] Bxc3


[System] You are a 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: 3r4/4kp1p/6p1/8/1RP1P2P/1K3P2/R2r2P1/8 b - - 2 31

[Assistant] R8d3+


[System] You are a 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/pp2nppp/1bp2q2/3P4/1P2P3/P1N1BN2/2P1QPPP/R4RK1 b - - 0 13

[Assistant] Qxc3


[System] You are a 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: 1k3bnr/ppp3pp/8/4Q3/2q5/8/PPP1NPPP/2Kr3R w - - 0 17

[Assistant] Rxd1


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

[User] FEN: r2qk2r/pp3ppp/5n2/8/2pPPBP1/3n2P1/PP4BP/RN1Q1RK1 b kq - 0 15

[Assistant] Qxd4+


[System] You are a 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: 1k6/1p6/1p1r4/6bB/3N1p1p/P3P3/1P1R1KPP/8 b - - 0 34

[Assistant] fxe3+


[System] You are a chess 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 c5 2. b3 Nf6 3. Bb2 e6 4. c4 Be7 5. g3

[Assistant] d5


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

[User] 1. d4 c5 2. Nf3 cxd4 3. Nxd4 d6 4. Nf3 Nf6 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. c4 a6 9. Nc3 Nc6 10. Bg5 h6 11. Bf4 Be6 12. Nd5 Rc8 13. Rc1 Nh5 14. Be3 Bxd5 15. cxd5 Ne5 16. Qd2 Nc4 17. Rxc4 Rxc4 18. Bxh6 Bxh6 19. Qxh6 f6 20. Nh4 Rxh4 21. gxh4 Qe8 22. Bh3 Ng7 23. Kh1 f5 24. Rg1 Rf6 25. f3 Kf7 26. e4 e6 27. h5 Qg8 28. hxg6+ Ke7 29. dxe6 Nxe6 30. exf5 Nd4 31. Re1+ Kd7 32. Qh4

[Assistant] Qg7


[System] You are a 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/p6p/6P1/2b1q3/1p1p4/1P1Q2P1/PB4KP/5R2 b - - 0 36

[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: 5r1k/1p4pp/pqp5/4Q3/4P2b/2N2r1B/PPP4P/1K1R2R1 b - - 0 25

[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] 1. Nf3 d5 2. d4 e5 3. Bg5 e4 4. Bxd8 exf3 5. Bxc7 Na6 6. Bd6 Bxd6 7. exf3 Nf6 8. Bxa6 bxa6 9. Qe2+ Be6 10. O-O O-O 11. Qxa6 Bb4 12. Qa4 Be7 13. c3 Rfd8

[Assistant] Nd2


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

[User] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2 c6 6. a3 Ba5 7. b4 Bc7 8. d5 d6 9. g3 cxd5 10. cxd5 e5 11. Bg2

[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 e6 2. c4 Be7 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bxf3 6. exf3 c6 7. f4 d6 8. O-O Nf6 9. Nc3 O-O 10. b3 Na6 11. Bb2 Rc8 12. Re1 Nb8 13. Qe2 Qc7 14. Rad1 Rfd8 15. Rd2 Nbd7 16. Red1 Nf8 17. h3 Ng6 18. Kh2 Re8 19. f3 Bf8 20. Qd3 Rcd8 21. Rf2 e5 22. fxe5 dxe5 23. d5 cxd5 24. Nxd5 Nxd5 25. cxd5 Ne7 26. f4

[Assistant] exf4


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

[User] 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7 6. Be2 f6 7. O-O fxe5 8. dxe5 Qc7 9. Bf4 Nh6 10. Re1 Nf7 11. Bf1 Be7 12. Nbd2 g5 13. Bg3 h5 14. h4 O-O-O 15. Nxg5 Nxg5 16. hxg5 Bxg5 17. Nf3 Be7 18. Rc1 h4 19. Bh2 Rdg8 20. Kh1 Be8 21. b4 Bh5

[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. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. c4 Nc6 6. Be3 Qa5+ 7. Nc3 Nf6 8. Nb3

[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. Nf3 d5 2. g3 c6 3. Bg2 Nf6 4. O-O Bf5 5. d3 h6 6. Nbd2 Bh7 7. b3 e6 8. Bb2 Bd6 9. Qe1 O-O 10. e4 dxe4 11. dxe4 Bb4 12. c3 Be7 13. e5 Nd5 14. Ne4 Nd7 15. Qe2 Qc7 16. c4 Nb4 17. a3 Na6 18. Rfd1 Nac5 19. Nd6 Nxb3 20. Ra2 Nbc5 21. Bd4 Rad8 22. Qe3 Na4 23. h4 c5 24. Ba1 Ndb6 25. g4 Bxd6 26. exd6 Rxd6 27. Re1

[Assistant] Nxc4


[System] You are a chess 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. d3 d5 3. f4 dxe4 4. fxe5 exd3 5. Bxd3 Qh4+ 6. g3 Qg4 7. Qxg4 Bxg4 8. Ne2 Bf3 9. Rf1 Bg2 10. Rf2 Bc6 11. Bf4 Bc5 12. Rf1 Bg2 13. Nbc3 Bxf1 14. Kxf1 Ne7 15. Ne4 Bb6 16. Rd1 O-O 17. Bg5 Nbc6 18. Kg2 h6 19. Bf4 Nd5 20. Bc4 Ne3+ 21. Bxe3 Bxe3 22. Kf3 Bb6 23. Rd5 Rfe8 24. Nf4

[Assistant] Nxe5+


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Nf6 6. f3 Be7 7. Nb3 O-O 8. Be3 Nc6 9. Qd2 d5 10. exd5 exd5 11. O-O-O Re8 12. Kb1 Bb4 13. a3 Bxc3 14. Qxc3 Qe7 15. Bg5 Be6 16. Bxf6 gxf6 17. Nd4 Nxd4 18. Qxd4 Rec8 19. Bd3 f5 20. Rhe1 Qg5 21. g3 Rc6 22. f4 Qg4 23. Qf2 Rac8 24. Re5 Qxd1+ 25. Ka2 d4+ 26. Rxe6 fxe6 27. Qxd4 Rxc2 28. Qf6

[Assistant] R2c6


[System] You are a chess 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 e5 5. Nxc6 bxc6 6. Bd3 Be7 7. O-O Bg5 8. f4 exf4 9. Bxf4 Bxf4 10. Rxf4 Qb6+ 11. Kh1 Qxb2 12. Nd2 Ne7 13. Rb1 Qe5 14. Rf1 O-O 15. Nc4 Qc7 16. Qe2 Ba6 17. Ne3 Bxd3 18. cxd3 Rab8 19. Rbd1 Qe5

[Assistant] Ng4


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. O-O Be7 8. Be3 O-O 9. f4 Nbd7 10. Bf3 Qc7 11. a4 Rb8 12. Nb3 b6 13. Qd2 Bb7 14. Kh1 Rfd8 15. Rfd1 Nc5 16. Nxc5 dxc5 17. Qf2 b5 18. axb5 axb5 19. Nxb5 Qb6 20. c4 Nxe4 21. Qc2 f5 22. b4

[Assistant] Rxd1+


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

[User] 1. d4 g6 2. c4 Bg7 3. Nc3 Nf6 4. e4 b6 5. f3 Bb7 6. Be3 d6 7. Qd2 Nbd7 8. O-O-O e6 9. Kb1 Qe7 10. g4 h5 11. g5 Nh7 12. h4 O-O-O 13. Bh3 Kb8 14. Nge2 e5 15. Rhf1 exd4 16. Nxd4 Rhf8 17. Nd5 Qe8 18. Qb4 Ne5 19. Qa3 c5 20. Nb5 a6 21. Nbc3 Qc6 22. f4 Nd7 23. f5 Ka7 24. f6 Bh8 25. Ne7 Qc7 26. Ncd5 Bxd5 27. exd5 Ne5 28. Qb3 Rfe8 29. Bf4 Rxe7 30. fxe7 Qxe7 31. Rde1 Rf8 32. Bxe5 Bxe5 33. Ka1 Qd8 34. Qf3 Qe7 35. Bg2 f5 36. Qa3 Nf6 37. Re2 Ng4 38. Rfe1 Qb7 39. Qf3 Re8 40. Bh3 Qc7 41. Bxg4 hxg4 42. Qg2 Qg7 43. a3 Rb8 44. Ka2 Kb7 45. Re3 Kc7 46. Qe2 Re8 47. Qc2 b5 48. cxb5 axb5 49. Qb3 Kb6 50. a4 Ra8 51. Qxb5+ Kc7 52. Qc6+ Kb8 53. Rxe5 dxe5 54. Qd6+ Qc7 55. Qxc7+ Kxc7 56. Rxe5 Kd6 57. Kb3 Kxe5 58. Kc4 Kd6 59. b3 Rb8 60. a5 Rb4+ 61. Kc3 Rd4

[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] FEN: 2r5/P2R1pk1/2K3p1/1B5p/3r1P2/8/8/8 w - - 4 48

[Assistant] Kb7


[System] You are a chess 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. cxd5 cxd5 4. Nc3 Nf6 5. Bf4 Nc6 6. e3 Bf5 7. Qb3 Qb6 8. Qxb6 axb6 9. Bb5 e6 10. Nf3 Bb4 11. Ne5 O-O 12. Bxc6 bxc6 13. Nxc6 Bxc3+ 14. bxc3 Bd3 15. Kd2 Bc4 16. f3 Bxa2 17. g4 b5 18. h4 Bc4 19. h5 h6

[Assistant] Na5


[System] You are a 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: 8/8/8/1p3p2/1PN2K2/P6k/8/8 b - - 0 53

[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] 1. d4 c5 2. Nf3 cxd4 3. Bg5 d5 4. Nxd4

[Assistant] Nc6


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

[User] 1. e4 g6 2. d4 Bg7 3. Nc3 e6 4. h4 Ne7 5. h5 O-O 6. hxg6 fxg6 7. Bh6 Bxh6 8. Rxh6 d5

[Assistant] e5


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

[User] FEN: r5k1/1R1P1pp1/8/8/3p3p/3K1P2/8/8 w - - 0 34

[Assistant] Rc7


[System] You are a 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: 8/3N3k/4p3/2p2p2/2Pbb3/pP1N2Pp/P3K2P/8 w - - 2 56

[Assistant] N7xc5


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

[User] 1. d4 e5 2. Nf3 d6 3. dxe5 Nc6 4. exd6 Bxd6 5. Bd2 Nf6 6. Nc3 O-O 7. e3 Re8 8. Be2 Ng4

[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 d5 2. Nf3 c5 3. dxc5 Nc6 4. c4 d4 5. e3 e5 6. exd4 exd4 7. Bd3 Bxc5 8. O-O Nf6 9. Re1+ Be6

[Assistant] a3


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

[User] FEN: r5k1/1p2p1b1/p2p2q1/2pP1bn1/2P5/5QN1/PP3P2/4RR1K w - - 2 27

[Assistant] Qxf5


[System] You are a chess 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 c5 3. c4 cxd4 4. Nxd4 b6 5. Nc3 Bb7 6. f3 e6 7. e4 d6 8. Be2 Be7 9. Be3 Nbd7 10. O-O a6 11. Qd2 Qc7 12. Rac1 Rc8 13. Rfd1 O-O 14. Bf1 Qb8 15. b4 Kh8 16. Nce2 Rg8 17. Ng3 g5 18. a3 Rg6 19. h3 Rcg8 20. Ndf5

[Assistant] exf5


[System] You are a chess 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 Bb4 6. Bd3 Nc6 7. Nxc6 dxc6

[Assistant] Qg4


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

[User] 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. exd6 exd6 5. Nf3 Be7 6. Be2 O-O 7. O-O Bg4 8. c4 Nb6 9. b3 Nc6 10. Be3

[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] FEN: rq3rk1/3R1p1p/p1b1pbpP/1p2p3/4P1Q1/1BN3P1/PP3PK1/7R w - - 6 23

[Assistant] Rxf7


[System] You are a chess 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 g6 4. Nf3 Bg7 5. O-O c5 6. d5 d6 7. c4 Nd7 8. Nc3 Ngf6 9. Bg5 h6 10. Bh4 O-O 11. Re1 Re8 12. e5 dxe5 13. Nxe5 Nxe5 14. Rxe5 a6 15. Re1 Qd7 16. Bc2 b5 17. Qd3 Rab8 18. Rad1 Ba8 19. b3 Red8 20. Ne4 bxc4 21. bxc4 Qc7 22. Bg3 Qa5 23. Bxb8 Rxb8 24. Bb3 Rd8 25. Ng3 Qc7 26. Qe2 Bf8 27. Rd3 Ne8 28. Qd2 Bb7 29. Ne4 Nd6 30. Nxd6 exd6 31. Rde3 Bc8 32. Re8 Rxe8 33. Rxe8 Kg7 34. Qe3 Bd7 35. Re4 a5 36. h4 a4 37. Bc2 Qd8 38. h5 Qf6 39. Rf4 Qa1+ 40. Kh2 Qe5 41. Qf3 g5 42. g3 gxf4 43. gxf4 Qb2 44. Qe4 f5 45. Qd3 Qd4 46. Qg3+ Kh8 47. Qg6 Qxf2+ 48. Kh3 Qf3+ 49. Kh2

[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] FEN: 2r2rk1/p4p1p/1p2p1p1/2q5/8/PB3Q2/5PPP/2R1R1K1 b - - 3 28

[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] FEN: 3r1b1r/4pppp/2Bq1nk1/8/2Q3P1/2P5/PP3P1P/nNB2K1R w - - 1 18

[Assistant] Be4+


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

[User] 1. g3 d5 2. Bg2 c6 3. b3 Nf6 4. Bb2 Bf5 5. d3 Nbd7 6. Nd2 h6 7. h4 Bh7 8. e3 e6

[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] 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. e3 g6 6. Nc3 Bg7 7. Nf3 O-O 8. a4 d6

[Assistant] Ra3


[System] You are a chess 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. Nf3 c5 3. b3 Nc6 4. Bb2 e6 5. g3 Be7 6. Bg2 O-O 7. O-O d5 8. d3 b6 9. Nbd2 Bb7 10. e4 d4

[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 e6 2. b3 d5 3. Bb2 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be2 Rb8 8. O-O b5 9. Nc3 a6 10. Qe1 c4 11. d4 cxd3 12. Bxd3 Nc5 13. Ne2 Nxd3 14. cxd3 Be7 15. Ned4 Bd7 16. f5 Nxd4 17. Nxd4 exf5 18. e6

[Assistant] fxe6


[System] You are a chess 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. Nf3 Nc6 4. g3 d5 5. exd5 Nxd5 6. Bg2 Nxc3 7. bxc3 Bd6 8. O-O O-O 9. Re1 Bg4 10. Rb1 b6 11. d3 Ne7 12. h3 Bh5

[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 c6 2. Nc3 d5 3. exd5 cxd5 4. Nf3 Nf6 5. d4 Bg4 6. Bd3 Bxf3 7. gxf3 e6 8. f4 Be7 9. f5 Nbd7 10. fxe6 fxe6 11. Bf4 Qc7 12. Bxc7 O-O 13. Be5 Ne4 14. Bxe4 dxe4 15. Nxe4 Bb4+ 16. c3 Nxe5

[Assistant] dxe5


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

[User] 1. d4 Nf6 2. Nc3 d5 3. e4 dxe4 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. Bg5 O-O 8. Qd2 c5 9. d5 Bg4 10. O-O-O Nbd7 11. h3 Bf5 12. g4 Be4 13. Qf2 a6 14. Be2 b5 15. h4 b4 16. Nxe4 Nxe4 17. Qe3 Ng3 18. h5 Nxh1 19. Rxh1 Nf6 20. hxg6 fxg6 21. Qe6+ Rf7 22. Bxf6 Bxf6 23. g5 Bg7 24. Ne5 Bxe5 25. Qxe5 Qd6 26. Qe4 Raf8 27. Bg4

[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. e4 c5 2. Nf3 e6 3. b3 Nc6 4. Bb2 a6 5. a4 d5 6. Nc3 Nf6 7. e5 Nd7 8. Qe2 Qc7 9. Nd1 Be7 10. g3 g5 11. g4 h5 12. gxh5 g4 13. Ng1 Ndxe5 14. Ne3 Nd4 15. Bxd4 cxd4 16. Nxg4 Nxg4 17. Qxg4 Bf6 18. Qd1 e5 19. Bg2 Be6 20. Ne2 Ke7

[Assistant] c3


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

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. a3 Bc5 7. Nb3 Bb6 8. Be2 d5 9. exd5 Nxd5 10. Nxd5 Qxd5 11. Qxd5 exd5 12. Bf3 Be6 13. Be3 O-O-O 14. O-O-O Bxe3+ 15. fxe3 Ne5 16. Rhe1 Nxf3 17. gxf3 Rhe8 18. Nd4 Kc7 19. b3 a6 20. a4 b6 21. Kb2 g6 22. Rg1 h5 23. h4 Rd6 24. Rg5 Red8 25. Ne2 Rc6 26. Nf4 Kb7 27. Nxd5 Bxd5 28. Rgxd5 Re8 29. e4

[Assistant] Rec8


[System] You are a 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: 8/8/2k1r2p/pp5R/2pP1P2/P1P3p1/3K2P1/8 w - - 0 39

[Assistant] d5+


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

[User] 1. d4 e5 2. Nf3 Nc6 3. Bg5 f6 4. Bh4 g5 5. Bg3 e4 6. Ng1 f5

[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: 2r3k1/7p/p3nPpQ/1p1pP3/1P1P1p2/P3q3/6RK/8 w - - 0 42

[Assistant] f7+


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

[User] 1. e4 c6 2. Nc3 d5 3. exd5 cxd5 4. d4 Nf6 5. Nf3 Nc6 6. Be2 Bg4 7. O-O e6 8. Be3 Bb4 9. h3 Bh5 10. a3 Bxc3 11. bxc3 O-O 12. c4 Rc8 13. cxd5 exd5 14. Rc1 Na5 15. Bd2 Nc4 16. Bxc4 dxc4 17. Bc3 Nd5 18. g4 Bg6 19. Qd2 Nxc3 20. Qxc3 Qc7 21. Ne5 f6 22. Nxg6 hxg6 23. Rce1 Rfe8 24. Re3 Rxe3 25. Qxe3 c3 26. Qe6+ Kh7 27. Re1 Rd8 28. d5 Qd6 29. Qxd6 Rxd6 30. Re3 Rxd5 31. Rxc3 Ra5 32. Rb3 b6 33. c4 g5 34. Kg2 Kg6 35. Kg3 f5 36. f4 gxf4+ 37. Kxf4 fxg4 38. hxg4 Rg5 39. Rb5

[Assistant] Rxb5


[System] You are a 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: 1kr5/pq6/1p6/5p1p/PP1R4/2P1PP1P/2Q5/6K1 b - - 0 30

[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 c5 2. c4 cxd4 3. Nf3 Nc6 4. Nxd4 e5 5. Nxc6 bxc6 6. Nc3 f5 7. e4 Nf6 8. exf5 d6 9. Be2 Bxf5 10. O-O Qc7 11. Bf3 Be7 12. Nb5 Qb8 13. Bxc6+ Kf7 14. Bxa8 Qxa8 15. Nxd6+ Bxd6 16. Qxd6 Rd8 17. Qxe5

[Assistant] Bd3


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

[User] 1. b4 a5 2. b5 Nf6 3. c4 b6 4. Bb2 Bb7 5. e3 e6 6. Nc3

[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: r3q1kr/ppp1n1p1/7B/b2pP2R/3P2Q1/2P5/PP4PP/RN4K1 b - - 0 16

[Assistant] Qg6


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

[User] 1. Nf3 c5 2. g3 Nc6 3. d3 g6 4. Bg2 Bg7 5. O-O Nf6 6. Nbd2 O-O 7. e4 d6 8. Re1 Bg4 9. a4 Be6 10. Nc4 Bd7 11. Ng5 Bg4 12. f3 Bd7 13. Nh3 h6 14. Nf2 Qc8 15. Ne3 Qc7 16. f4 a6 17. Nd5

[Assistant] Ne8


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

[User] 1. d4 d5 2. c4 c6 3. Nf3 dxc4 4. a4 b6 5. Nc3 Ba6 6. e3 Nf6 7. Ne5 e6 8. Bxc4 Bxc4 9. Nxc4 Bd6 10. O-O Bc7 11. e4 Nbd7 12. e5 Nd5 13. Nxd5 cxd5 14. Na3 O-O 15. Nb5 Rc8 16. Nxc7 Rxc7 17. Bd2 Qc8 18. Rc1 Nb8 19. Rxc7 Qxc7 20. Qb3 Rc8 21. Rc1 Qd8 22. Rxc8 Qxc8 23. Qc3 Qxc3 24. Bxc3 Kf8 25. Kf1 Ke8 26. Ke2 Kd7 27. Kd3 Nc6 28. b4 Nd8 29. b5 Nb7 30. Bb4 f5 31. exf6 gxf6 32. f4 f5 33. Ke3 Nd8 34. Kf3 Ke8 35. g4 Nf7 36. g5 Nh8 37. h4 Kd7 38. h5 Ke8 39. Kg3 Nf7 40. g6 hxg6 41. hxg6 Nh6 42. Kh4 Ng8 43. Kg5 e5 44. fxe5 f4 45. Kxf4 Kd7 46. Kg5 Ke8 47. g7 Kd7 48. e6+ Ke8 49. Kg6 Ne7+

[Assistant] Kh7


[System] You are a chess 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. Nf3 e6 3. d4 d5 4. exd5 exd5 5. c4 Nf6 6. Nc3 Bb4 7. Be2 O-O 8. O-O dxc4 9. Bxc4 Bg4 10. Be3 Bxc3 11. bxc3 Nd5 12. Bd2 Nb6 13. Be2 Qf6 14. h3 Bxf3 15. Bxf3 Rad8 16. Qc1 h6 17. Bf4 Rd7 18. Re1 Rfd8 19. Bg4 Rd5 20. Bxc7 Rf8 21. Bg3 Nc4 22. Bf3 Rb5 23. Rb1 Rf5 24. Rxb7 N6a5 25. Rxa7 Rxf3 26. gxf3 Qxf3 27. Qf4 Qxc3

[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 d5 2. e3 Nf6 3. Nf3 e6 4. b3 c5 5. Bb2 Nc6 6. Nbd2 Bd6 7. Bd3 O-O 8. O-O g6 9. Ne5 Bxe5 10. dxe5 Ne8 11. f4 Ng7 12. Qf3 Ne7 13. g4 Re8 14. h4 b6 15. Kf2 Bb7

[Assistant] e4


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

[User] 1. Nf3 g6 2. d4 Bg7 3. Bf4 Nf6 4. e3 O-O 5. h3 c5 6. Nbd2 cxd4 7. exd4 d5 8. c3 Nc6 9. Bd3 Bf5 10. Bxf5 gxf5 11. O-O Ne4 12. Re1 e6 13. Nf1 Kh8 14. N3d2 Rg8 15. f3 Nxd2 16. Nxd2 Bf6 17. Qe2 Bg5 18. Qe3 Bxf4 19. Qxf4 Rg6 20. Kh1 Qe7 21. Re2 Rag8 22. Rae1 Qf6 23. Nf1 Qg7 24. g4 fxg4 25. fxg4 Rf6 26. Qg3 Rg6 27. Qf4

[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] 1. Nf3 c6 2. b3 d5 3. Bb2 Nf6 4. d4 Bf5 5. g3 Nbd7 6. Bg2 h6 7. O-O e6 8. Nbd2 Be7 9. c4 O-O 10. Rc1 a5 11. Ne5 Bh7 12. a3 Bd6 13. e3 Qe7 14. Nxd7 Nxd7 15. c5 Bc7 16. Qe2 e5 17. Rfe1 e4 18. f3 f5 19. fxe4 fxe4 20. Rf1 Nf6 21. Rf2 Rf7 22. Rcf1 Raf8 23. Bh3 g5 24. Bf5 h5 25. b4 axb4 26. axb4 Kg7 27. Bxh7 Kxh7 28. Rf5 g4 29. R1f2 Ng8 30. Rxf7+ Rxf7 31. Rxf7+ Qxf7 32. Qf2 Qxf2+ 33. Kxf2 Ne7 34. Nb3 Kg6 35. Nc1 Kg5 36. Ne2

[Assistant] Nf5


[System] You are a 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: 2r5/2rk4/q3p1pp/1R1pPp2/1n1P1PP1/4B1KP/2R1Q3/8 w - - 0 35

[Assistant] Rxb4


[System] You are a chess 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. Nd2 c6 3. e4 e5 4. exd5 cxd5 5. c4 Nc6 6. cxd5 Qxd5 7. Nb3 Qd8 8. Be2 Nf6 9. Be3 Bd6 10. h3 O-O 11. Nf3 Re8 12. O-O Bf5 13. Nfd2 Qd7

[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: 5rk1/5ppp/8/3Q4/8/1PR1P2P/4rqP1/3R3K b - - 3 26

[Assistant] Re1+


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

[User] 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. Bd3 Bb5

[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] 1. f3 d5 2. g4

[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 c5 3. Nf3 cxd4 4. Nxd4 b6 5. Nc3 Bb7 6. f3 d6 7. e4 e6 8. Be3 Be7 9. Qd2 a6 10. O-O-O Qc7 11. g4 Nbd7 12. Kb1 h6 13. h4 Rc8 14. Be2 Ne5 15. b3 b5 16. Ndxb5 axb5 17. Nxb5 Qb8 18. Nxd6+ Bxd6 19. Qxd6 Qxd6 20. Rxd6

[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] 1. d4 Nf6 2. Nf3 e6 3. Bg5 d5 4. Bh4 c5 5. Nbd2 Qb6 6. e3 Qxb2 7. dxc5 Bxc5 8. Be2 Bb4 9. O-O Bxd2 10. Qxd2 Nc6 11. Rfb1 Qa3 12. Rb3 Qe7 13. c4 O-O 14. cxd5 exd5 15. Rd1 Be6 16. Bxf6 Qxf6 17. Rxb7 Rab8 18. Rxb8 Rxb8 19. h3 Ne5 20. Nd4 Qg6 21. Kh2 h6 22. f4 Nd7 23. Bd3 Qf6 24. f5 Qe5+ 25. Kg1 Nc5 26. fxe6 fxe6 27. Bb1 Ne4 28. Bxe4 Qxe4 29. Rf1 e5 30. Nc6 Rc8 31. Ne7+ Kh7 32. Nxc8 d4 33. exd4 exd4 34. Nd6 Qd5 35. Qd3+ g6

[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: 3r1k2/p2P2b1/Ppp2p1p/4qQp1/3N4/4K3/4R3/8 w - - 4 42

[Assistant] Qxe5


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

[User] 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bf4 Bd6 6. Bg5 Nbd7 7. Rc1 h6 8. Bh4 O-O 9. e3 a6 10. Qc2 Re8 11. c5 Be7 12. g4 Ne4 13. Bxe7 Qxe7 14. Nxe4 dxe4 15. Qxe4 Nf6 16. Qc2 Nxg4 17. Rg1 Nf6 18. Ne5 Nd7 19. f4 Nxe5 20. fxe5 Qh4+ 21. Kd1 f6 22. Qg2 Re7

[Assistant] exf6


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

[User] 1. g3 Nf6 2. Nf3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 d6 6. Nc3 Nc6 7. d4 a6 8. d5 Na5 9. Nd2 c5 10. Qc2 b5 11. b3 bxc4 12. bxc4 Bf5 13. e4 Bg4 14. f3 Bd7 15. Bb2 e5 16. Rab1 Rb8 17. Ne2 Nh5 18. Bc3 Rxb1

[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 d6 2. d4 Nd7 3. Nc3 c6 4. Be3 Ngf6 5. f3 e5 6. Bc4 Be7 7. Qd2 Nb6 8. Bb3 exd4 9. Bxd4 O-O 10. Be3 c5 11. Bd5 Nfxd5 12. Nxd5 Nxd5 13. exd5 Bf6 14. c3 Re8 15. Kf2 Qb6 16. Ne2 Bf5 17. Ng3 Bg6 18. h4 c4 19. Bxb6

[Assistant] axb6


[System] You are a 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/p1Qbkrp1/1p2p3/3pP1K1/3Pp3/2P1B2R/PP2q1PP/8 b - - 5 33

[Assistant] Rf5+


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

[User] 1. c3 e5 2. Nf3 Nc6 3. d4 exd4 4. cxd4 d5 5. e3 Bb4+ 6. Bd2 Bxd2+ 7. Nbxd2 Nf6 8. Be2 O-O 9. O-O Bg4 10. b3 Bh5 11. Ne5 Bg6 12. Nxc6 bxc6 13. Rc1 Qd7 14. a3 Ne4 15. b4 a5 16. Nb3 axb4 17. axb4 Rab8 18. Nc5 Nxc5 19. bxc5 Rb4 20. Bg4 Qe7 21. Bf3 Rfb8 22. g3 Be4 23. Bg2 Bxg2 24. Kxg2 Qe4+ 25. Qf3 Qxf3+ 26. Kxf3 Rb2 27. h4 g6 28. Ra1 Kf8 29. Ra6 Ke7 30. Rxc6 Kd7 31. Rf6 Ke7 32. Rc6 Kd7 33. Ra6 Rc2 34. Rfa1 Rbb2 35. Rf1 h5 36. Ra8 Ra2 37. Rh8 Ke7 38. Rh7 Kf8 39. Rh8+ Ke7 40. Rc8 Kd7 41. Rg8 Ke7 42. Kg2

[Assistant] Kd7


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

[User] 1. g3 d6 2. Bg2 Nf6 3. b3 g6 4. Bb2 Bg7 5. h4 O-O 6. e3 Bg4 7. Ne2 c6 8. d3 Nbd7 9. Nd2 e5 10. f3 Be6 11. g4 d5 12. h5 g5 13. h6 Bh8 14. Ng3 Re8 15. e4 d4 16. Nf5 Bxf5 17. gxf5 Kf8 18. Qe2 Ng8 19. Qf2 Bf6 20. Qg3 b5 21. O-O-O a5 22. c3 dxc3 23. Bxc3 Nc5 24. Nb1 Qd7 25. Kc2 Nb7 26. Rhg1 Ke7 27. Bh1 Kd8 28. Qh3 Kc7 29. Qh5 Rad8 30. Rxg5 Bxg5 31. Qxg5 f6 32. Qg7 Qxg7 33. hxg7 Rd7 34. Rg1 b4 35. Bb2 Ree7

[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: 8/8/4p3/3k1p2/1p1P1P2/2p1K3/PP6/8 w - - 0 44

[Assistant] bxc3


[System] You are a 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: 8/2RR4/p4pk1/4p3/4P1pp/5P1P/P2B2PK/5q2 b - - 3 34

[Assistant] g3#


[System] You are a 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: 6k1/1bq2pbp/pn1p1np1/1p1Pp3/1P2P2P/N2QBN2/P4PP1/1B4K1 b - - 2 24

[Assistant] Nbxd5


[System] You are a chess 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 Nd7 3. Bd3 e5 4. Ne2 Ngf6 5. O-O Be7 6. Bg5 O-O 7. Nd2 h6

[Assistant] Bh4


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

[User] 1. Nf3 d5 2. b3 c6 3. Bb2 Nf6 4. g3 Bf5 5. Bg2 Nbd7 6. O-O e6 7. d4 Be7 8. c4 O-O 9. Nc3 a5 10. Rc1 Ne4 11. Nd2 Ndf6

[Assistant] Ndxe4


[System] You are a chess 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 d3 4. c4 Nc6 5. Bxd3 g6 6. Nf3 Bg7 7. Nc3 d6 8. O-O Nf6 9. h3 O-O 10. Be3 Nd7 11. Qe2 Nde5 12. Rfd1 Nxf3+ 13. Qxf3 Ne5 14. Qe2 b6 15. Rac1 Bb7 16. Nd5 e6 17. Nc3 Qh4 18. f3 h5 19. Qf1 Nxd3 20. Rxd3 Be5 21. Bf2 Qg5 22. Rcd1 Rac8 23. b3 h4 24. Ne2 f5 25. exf5 Rxf5 26. Be3 Qh5 27. Rxd6 Bxd6 28. Rxd6 Bxf3 29. Nd4 Re5 30. Bf4 Re4 31. Nxe6 Bxg2 32. Qxg2 Re1+ 33. Kh2 Re2 34. Ng5

[Assistant] Rxg2+


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

[User] FEN: 6k1/pN2qpp1/1n2p1bp/2Q1n3/8/P2P1BP1/3NPP1P/6K1 b - - 4 27

[Assistant] Nxf3+


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

[User] FEN: 8/7k/8/1P1B4/P1K3p1/7p/8/4b3 w - - 0 46

[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. e4 g6 2. d4 Bg7 3. Nc3 c5 4. Nf3 cxd4 5. Nxd4 d6 6. Be3 Nc6 7. f3 Bd7 8. Qd2 Rc8 9. O-O-O a6 10. g4 b5 11. Nxc6 Bxc6 12. Bd4 Bxd4 13. Qxd4 f6 14. h4 Qc7 15. Kb1 Bd7 16. Bd3 e5 17. Qf2 Ne7 18. g5 fxg5 19. hxg5 b4 20. Nd5 Nxd5 21. exd5 Bf5 22. Bxf5 gxf5 23. g6 h5 24. Qh4 Qxc2+ 25. Ka1 b3 26. Qf6 Rg8 27. Qe6+ Kd8 28. Qxg8+ Kc7 29. Qxc8+ Kxc8 30. Rc1

[Assistant] Kd8


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

[User] 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bf4 dxc4 6. e3 b5 7. a4 Bb4 8. Be2 Bb7 9. O-O a6 10. Ne5 Nbd7 11. Bf3 Nxe5 12. Bxe5 O-O 13. axb5 axb5 14. Nxb5 cxb5 15. Bxb7 Rxa1 16. Qxa1 Qb6 17. Bf3 Nd5 18. Qb1 Bd6 19. Bxd6 Qxd6 20. Qc2 Nb4 21. Qc3 f5 22. Rd1 Nd3 23. Be2 Nb4 24. b3 cxb3 25. Qxb3 Rc8 26. Bxb5 Rc2 27. Bc4 Qc6 28. Bxe6+ Kh8 29. Bd5 Nxd5 30. Qb8+ Qc8 31. Qe5 Nf6 32. h3 h6 33. d5 Ne4 34. d6 Qd7 35. Qe7 Qa4 36. d7 Rxf2 37. d8=Q+ Kh7 38. Qee8

[Assistant] Qa2


[System] You are a 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: 1r1q1rk1/pb3p2/2nbpn1p/2pp4/6P1/2N2N1P/PPPQBP2/1K4RR w - - 0 18

[Assistant] Qxh6


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

[User] 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. h5 Bh7 8. Nf3 Nf6 9. Bd3 e6 10. Bxh7 Nxh7 11. Qd3 Nd7 12. Bd2 Bd6 13. O-O-O Qc7 14. Kb1 Bxg3 15. fxg3 Qxg3 16. c4

[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] 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. Kf1 O-O

[Assistant] c4


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

[User] FEN: 4r1k1/Q4pp1/1p5p/2p5/4q3/4P1R1/P5PP/1r3RK1 w - - 2 32

[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] 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bg5 Ne4 5. Nxe4 dxe4 6. Qd2 h6 7. Bh4 g5 8. Bg3 Bg7 9. e3 f5 10. Ne2 e5 11. Bxe5 Bxe5 12. dxe5 Qxd2+ 13. Kxd2 Nd7 14. e6 Nc5 15. Nd4 Rf8 16. h4 g4 17. g3 Nxe6 18. Nxe6 Bxe6 19. Kc3 Ke7 20. Be2 Rfd8 21. Rhd1 c5 22. a3 Rxd1 23. Rxd1 Rd8 24. Rb1 Kd6 25. b4 b6 26. bxc5+ Kxc5 27. Rb5+ Kd6 28. Kd4 Rc8 29. a4 Rc5 30. Bf1 Bd7 31. Rb4 Ra5 32. Rb2 Rxa4 33. Rd2 Be6 34. Kc3+ Kc7 35. Be2 Ra3+ 36. Kb4 Ra5 37. Bd1 Rc5 38. Bb3 a5+ 39. Kc3 Bxc4 40. Bxc4 b5 41. Kd4 Rxc4+ 42. Ke5

[Assistant] Rc5+


[System] You are a 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/ppknR3/2p5/3p4/8/1P3P1q/P1Q4R/7K b - - 1 35

[Assistant] Qf1#


[System] You are a chess 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. c3 Nf6 4. e5 Nd5 5. Bc4 Nb6 6. Bb3 d5 7. d4 cxd4 8. cxd4 Bf5 9. Nh4

[Assistant] Bg6


[System] You are a chess 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. cxd5 cxd5 4. Bf4 Nc6 5. Nc3 Nf6 6. e3 Bf5 7. Nf3 a6 8. Rc1 e6 9. Qb3 Ra7 10. Ne5 Nxe5 11. Bxe5 Nd7 12. Bg3 Be7 13. Be2 O-O 14. O-O b5 15. a4 b4 16. Na2 a5 17. Rc6 Nf6 18. f3 h6 19. Rfc1 Qa8 20. Bd3 Bxd3 21. Qxd3 Rd8 22. R1c2 Bf8 23. Nc1

[Assistant] Nd7


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

[User] FEN: 3q4/8/3PNnpk/4Qr2/2p5/1nP5/8/6K1 w - - 2 49

[Assistant] Qe3+


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

[User] FEN: 8/7p/6p1/3nkp2/1p2P3/7P/2N1K1P1/8 w - - 0 40

[Assistant] exd5


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

[User] 1. e4 d5 2. exd5 Nf6 3. Nf3 Qxd5 4. g3 Bg4 5. Bg2 Qe4+ 6. Kf1 Nc6 7. h3 Bh5 8. Nc3 Qe6 9. g4 Bg6 10. Nh4 O-O-O 11. d3 Qd7 12. f4 e6 13. Qf3

[Assistant] Bc5


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

[User] FEN: rnbqr1k1/ppp2ppp/8/3n2N1/3P4/P2QB3/2P2PPP/R3K2R w KQ - 2 13

[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. d3 g6 2. Nf3 Bg7 3. g3 c5 4. Bg2 d5 5. O-O Nc6 6. Nc3 Nf6 7. h3 h5 8. e4 h4 9. Nxh4 Rxh4 10. gxh4 d4 11. Nd5 Nh5 12. Nf4 Nxf4 13. Bxf4 e5 14. Bg3 Be6 15. f4 Qc7 16. f5 gxf5 17. exf5 Bd7 18. Qg4 Bf6 19. Qh5 O-O-O 20. Qxf7 Qd6 21. Kh2

[Assistant] Rf8


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

[User] 1. g3 e6 2. Bg2 c5 3. Nf3 Nc6 4. O-O Nf6 5. d4 d5 6. c4 cxd4 7. Qa4 Bd7 8. cxd5 Nxd5 9. Nxd4 Nxd4 10. Qxd4 Qf6 11. Qxf6 gxf6 12. Bxd5 exd5 13. e3 Bd6 14. Nc3 Be6 15. Rd1 d4 16. Rxd4 Be5 17. Rd1 Bxc3 18. bxc3 Ke7 19. Ba3+ Ke8 20. Bc5 b6 21. Bd4 Ke7 22. a4 Rhd8 23. a5 Bg4 24. Rdb1 bxa5 25. Rxa5 Bf3 26. Ra6 f5 27. Bf6+ Ke8 28. Bxd8 Kxd8 29. Rd6+ Ke7 30. Rd4 Be4 31. Rb5 a5 32. Ra4 Bc6 33. Raxa5 Bxb5 34. Rxa8 Bd3

[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] 1. Nc3 c5 2. Nf3 a6 3. e4 b5 4. d4 cxd4 5. Qxd4 Nc6 6. Qd1 g6 7. Bf4 Bg7 8. Nd5 d6 9. Ng5 Nf6 10. h4 Be6 11. h5 gxh5 12. Rxh5 Nxh5 13. Qxh5 Qd7 14. Bd3 O-O-O 15. O-O-O Kb7 16. Be3 Bf6

[Assistant] Nb6


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

[User] FEN: 8/4p1k1/3p1pp1/3qP1Qp/1p1P4/1Pr4P/5PP1/3R2K1 w - - 0 31

[Assistant] exf6+


[System] You are a chess 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 b6 2. g3 Bb7 3. Bg2 g6 4. O-O Bg7 5. d3 d6 6. c3 e5 7. Nbd2 Nf6 8. e4 O-O 9. a4 a5 10. b3 Nbd7 11. Ba3 Re8 12. Rc1 Nc5 13. Qc2 Bh6 14. Rfe1 Ba6 15. Bxc5 dxc5 16. Rcd1 Qxd3 17. Qb2 Qd6 18. Nc4 Qe7 19. Ncxe5 Bg7 20. Qc2 Bb7 21. c4 Rad8 22. Rxd8 Rxd8 23. h3 Qd6 24. Nxf7 Kxf7 25. e5 Qd3 26. Qxd3 Rxd3 27. exf6 Bxf6 28. Ne5+ Bxe5 29. Bxb7 Bd4 30. Bd5+ Kf8 31. Re2 Rxb3 32. Bc6 Rxg3+ 33. Kh2 Rc3 34. Bb5 c6 35. Bxc6 Rxc4 36. Bb5 Rc3 37. Re4 Rf3 38. Kg2 Rxf2+ 39. Kg3 Rf5 40. Re6 Kg7 41. Rxb6 h5 42. Rb7+ Kh6 43. Rc7 Be5+ 44. Kg2 Bxc7 45. Bc4 h4 46. Bb5 Rf4 47. Kg1 c4 48. Kg2 c3 49. Bd3 Rd4 50. Bc2 Rd2+ 51. Kf3 Rxc2 52. Kg4 Rd2 53. Kxh4 c2 54. Kg4 c1=Q 55. h4 Rd4+

[Assistant] Kf3


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

[User] 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. O-O b5 7. Bd3 Bb7 8. Qe2 c5 9. Rd1 cxd4 10. Nxd4 Nbd7 11. Nc3 Be7 12. b3 O-O 13. Bb2 Qb6 14. Rac1 Rfd8 15. h3 Rac8 16. Bb1 Nc5 17. Kh1 Nce4 18. Nxe4 Bxe4 19. Bxe4 Nxe4 20. Kg1 Bf6 21. Rxc8 Rxc8 22. Qd3 Qb7 23. a3 Nc5 24. Qb1 h6 25. Rc1 Nd7 26. g3 Rxc1+ 27. Qxc1 Ne5 28. Qc5 Nd3 29. Qc2 Nxb2 30. Qxb2 Qd5 31. Qc3 Bxd4 32. exd4 g6 33. b4 Kg7 34. h4 h5 35. Qc5 Qf3 36. Qe5+ Kg8 37. Qe3 Qxe3 38. fxe3 Kf8 39. e4 f6 40. Kf2 Ke7 41. Ke3 Kd6 42. Kd3 e5 43. Ke3 exd4+ 44. Kxd4 Ke6 45. Kd3 Ke5 46. Ke3 Kd6 47. Kd4 Ke6 48. Kd3 f5 49. exf5+ Kxf5 50. Ke3 Kg4 51. Kf2 g5 52. hxg5 Kxg5 53. Kf3

[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] FEN: r7/2q4k/1p2p2p/p3Pp2/3p1r2/P2B3Q/1PP4P/4K1R1 w - - 2 33

[Assistant] Qg2


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

[User] 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. b3 Nbd7 6. Bd3 Bd6 7. Bb2 Ne4 8. O-O

[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. Nf3 e6 2. g3 Be7 3. Bg2 Nf6 4. O-O e5 5. d4 e4 6. Nfd2 d5 7. c4 c6

[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 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Nbd7 7. O-O e5 8. Re1 Qe7 9. d5 a5 10. Be3 Ng4 11. Bg5 f6 12. Bh4

[Assistant] g5


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

[User] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 d6 6. Nc3 Bd7 7. Bg5 h6 8. Bxf6 Qxf6 9. Nd5 Qd8 10. c3 g6 11. O-O Bg7 12. d4 O-O 13. dxe5 Nxe5 14. Nxe5 Bxa4 15. Qxa4 dxe5 16. Rad1 c6 17. Ne3

[Assistant] Qc7


[System] You are a chess 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. d3 d6 5. c3 Be7 6. O-O O-O 7. h3 Na5 8. d4 exd4 9. cxd4 b6 10. b4 Nb7 11. Bc6 Rb8 12. Nc3 Bd7 13. d5 Re8 14. Re1 Bf8 15. Bb2 Qc8 16. e5 dxe5 17. Nxe5 Bxb4 18. Nxd7 Nxd7 19. Qg4 Rxe1+ 20. Rxe1 Ndc5 21. Qxb4 Nd3 22. Qe4 Nxe1 23. Qxe1 Nd6 24. Qe5 Qf5 25. Nb5 Qxe5 26. Bxe5 Nxb5

[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] FEN: 1k1r1b1r/pp3p2/2np1q1p/8/3NP3/6P1/PPQ2PP1/3RR1K1 w - - 0 20

[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: rn6/pp2qkp1/2p1b2p/8/2BPn3/1QP5/P5PP/R1B3K1 w - - 0 16

[Assistant] Bxe6+


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

[User] FEN: 8/8/7p/6p1/P7/6k1/1K6/8 w - - 0 53

[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 Nf6 2. Nc3 d5 3. Bg5 Nbd7 4. Nf3 c5 5. e3 e6 6. Be2 a6 7. O-O h6 8. Bh4 Be7 9. a3 Nh5 10. Bxe7 Qxe7 11. e4 dxe4 12. Nxe4 O-O 13. Ne5 Nhf6 14. Nxf6+ Nxf6 15. Bf3 Qc7 16. c3 cxd4 17. Qxd4 Rd8 18. Qf4 Nd5 19. Qg3 f6 20. Ng6

[Assistant] Qxg3


[System] You are a 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: 8/2p3pp/8/1P4P1/6kP/2K5/8/8 b - - 0 35

[Assistant] Kxh4


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

[User] 1. d4 d5 2. c4 c6 3. Nf3 e6 4. g3 g6 5. Bg2 Bg7

[Assistant] O-O


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

[User] 1. e3 b6 2. b3 Bb7 3. Nf3 e6 4. Be2 Nf6 5. Bb2 c5 6. d4 Be7 7. O-O Qc7 8. c4 Ng4 9. g3 h5 10. d5 f5 11. h3 Nc6 12. dxc6 Bxc6 13. Nc3 Nxe3 14. fxe3 Qxg3+ 15. Kh1

[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] FEN: 2R5/pp3p1k/7p/1b1P1PN1/5rB1/P3q3/6QP/7K b - - 0 32

[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] FEN: 2r1r1k1/pp3ppp/1q2b3/8/8/1BP1nN2/P3Q1PP/3RR2K w - - 8 23

[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] FEN: 1R6/1r6/2kP2p1/4P2p/1p3BrP/6P1/6K1/8 w - - 2 52

[Assistant] Rxb7


[System] You are a chess 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 Nc6 2. c3 e5 3. e3 exd4 4. exd4 d5

[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: r1b2rk1/ppp2ppp/3p1n2/2q5/4P2P/2N2Q2/PPP2PP1/2KR1B1R b - - 0 11

[Assistant] Bg4


[System] You are a chess 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 Bf5 4. d3 e6 5. Nbd2 h6 6. e4 Bh7 7. O-O Nf6 8. Re1 Be7 9. c3 O-O 10. Qb3 Qb6 11. Qc2 Na6 12. Ne5 Rfd8 13. Nb3 Nc5 14. Nxc5 Qxc5 15. d4 Qb6 16. f3 Rac8 17. Nd3 c5 18. dxc5 Bxc5+ 19. Nxc5 Qxc5+ 20. Be3 d4 21. Bf2 Qc7 22. Qa4 dxc3 23. bxc3 a6 24. Rac1 Nd7 25. Qb3 Nc5 26. Qb2 Na4 27. Qe2 b5 28. c4 b4 29. Qc2 Nc5 30. Qb2 a5 31. Qb1 Nd3 32. Red1 Nxc1

[Assistant] Rxc1


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

[User] 1. e4 c6 2. Nc3 d5 3. exd5 cxd5 4. d4 Nc6 5. Nf3 Bg4 6. Bb5 e6 7. Bxc6+ bxc6 8. Qd3 Nf6 9. Ne5 Bf5 10. Qa6 Rc8 11. Nxc6 Qc7 12. Ne5 Bd6 13. Nb5 Bb4+ 14. c3 Qb6

[Assistant] Qxb6


[System] You are a chess 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 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Bd3 Nxe4 7. Bxe4 Nf6 8. Bd3 Bd6 9. O-O O-O 10. c4 h6 11. c5 Be7 12. Qe2 b6 13. Rd1 Bb7 14. Ne5 Bd5 15. b3 bxc5 16. dxc5 Bxc5 17. Bb2 Bd6 18. Rac1 Qe7 19. Ng4 Nxg4 20. Qxg4 f5 21. Qg6 Qf7 22. Qxf7+ Rxf7 23. Bc4 Bxc4 24. Rxc4 e5 25. Kf1 e4 26. Bd4 a5 27. Bc5 Bxc5 28. Rxc5 g6 29. Rdd5 a4 30. b4 a3 31. Ra5 Rxa5 32. Rxa5 Rd7 33. Ke2 Kf7 34. Rxa3 Rd4 35. Rb3 f4

[Assistant] a3


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

[User] FEN: 5r2/4r1k1/3p1b1p/4q1pB/p4p2/P3p2R/1P4PP/1Q1R3K w - - 2 45

[Assistant] Qg6+


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

[User] FEN: r1bqk1r1/4npQN/1pn1p1p1/p1p5/4P3/P1PP4/B1P2PPP/R3K2R w KQq - 7 18

[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: 8/5ppk/8/3n4/7N/1P3P2/1Pr3PP/2R4K b - - 1 31

[Assistant] Rxc1#


[System] You are a chess 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 d5 6. Nbd2 c5 7. e4 Nc6 8. exd5 Nxd5 9. Nc4 b6 10. Re1 Bb7 11. c3 Qc7 12. Qc2 Rad8 13. a4 h6 14. Bd2 Rd7 15. Rad1 Kh7 16. Bc1 Rfd8 17. Nfd2 Nf6 18. Ne4 Nxe4

[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] FEN: r1b1k2r/pp3p1p/2n1p1pB/q2pP3/2pP2Q1/P1P2N2/2P1BPPP/R3K2R b KQkq - 0 11

[Assistant] Qxc3+


[System] You are a 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: r1k2b1r/5Rpp/p1nqP3/1p1Qp3/8/4p3/PP4PP/3R2K1 w - - 2 26

[Assistant] Rxf8+


[System] You are a chess 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 g6 3. f4 Bg7 4. Nf3 d5 5. g3 Bg4 6. Bg2 Bxf3 7. Qxf3 e6 8. O-O f5 9. Nd2

[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 e5 2. d4 Nc6 3. d5 Nce7 4. c4 d6 5. Nc3 f5 6. Nf3 f4 7. Bd3 Nf6 8. O-O Ng6 9. c5 Be7 10. cxd6 cxd6 11. b3 O-O 12. Ba3 a6 13. Rc1 b5 14. Ng5 Bd7 15. Ne6 Bxe6 16. dxe6 Rc8 17. Nd5 Re8 18. Rxc8 Qxc8 19. Qc2 Qxe6 20. Nc7 Qd7 21. Nxe8 Nxe8 22. Rc1 Nf6 23. Qc8+ Qxc8 24. Rxc8+ Kf7 25. Rc7 Ke8 26. Ra7 Nd7 27. Ra8+ Kf7 28. Rxa6 Ngf8 29. Bxd6 Bxd6 30. Rxd6

[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] 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. e4 Bg7 6. Be3 d6 7. Nc3 a5 8. Be2 a4 9. Nxa4 Bd7 10. Nc3 Nf6 11. O-O Qa5 12. Qd2 O-O 13. f3 Rac8 14. Rfd1 Ne5 15. b3 Nc6

[Assistant] Rac1


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

[User] 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 e5 5. Nf3 Bg4 6. dxe5 dxe5 7. Bd2 f6 8. Be2 Nd7 9. Qc2 c6 10. Rd1 Qc7 11. O-O Nh6

[Assistant] b4


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

[User] FEN: 2kr4/1pp1p3/p4p2/5P2/8/1B6/PP1RKP2/1r6 w - - 4 32

[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: 5rk1/1R3ppq/p1p5/4p3/3bP3/r6P/4NPP1/4QRK1 w - - 0 25

[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] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3

[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. e4 e6 2. Nc3 d5 3. b3 dxe4 4. Nxe4 Nd7 5. Ng3 Ngf6 6. Bb2 Be7 7. d4 O-O 8. Nf3 b6 9. Bd3 Bb7 10. O-O Rc8 11. Ne5 c5 12. Nxd7 Qxd7 13. dxc5 Qd5 14. f3 Bxc5+ 15. Kh1 Rfd8 16. Bxf6 gxf6 17. Qe2 f5 18. Rad1 Qc6 19. Qe5 Bd4 20. Qf4 Bg7 21. Nh5 h6 22. Qg3 Qc3 23. Rde1 Kh8 24. Nxg7 Qxg7 25. Qh3 Rf8 26. Re2 Rg8 27. Rfe1 Qg5 28. c4 Rg6 29. Bc2 Rcg8 30. Rf2 Bc8 31. f4 Qg4 32. Qe3 f6 33. g3 Bb7+ 34. Kg1 Re8 35. Bd1 Qh3 36. Bf3 Bxf3 37. Qxf3 e5 38. fxe5 fxe5 39. Qxf5 Qxf5 40. Rxf5 Rge6

[Assistant] Re4


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

[User] FEN: r1b2rk1/pp3pp1/2p2q2/4R1B1/1PB4n/P1PP2QP/5Pn1/RN4K1 b - - 2 17

[Assistant] Qxe5


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

[User] 1. c4 Nf6 2. Nf3 e6 3. d4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 c5 8. Bg5 cxd4 9. Nxd4

[Assistant] Bxg2


[System] You are a chess 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 e5 2. e3 Nf6

[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. c4 d5 3. Nc3 Nf6 4. e3 dxc4 5. Nf3 e6 6. Bxc4 Be7 7. Bd3 O-O 8. O-O Nbd7 9. e4 Re8 10. e5

[Assistant] Nd5


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

[User] 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. e4 b5 6. a4 Bb4 7. Bg5 Qc7 8. Be2 Bb7 9. O-O a6 10. Ne5 Nd7 11. Bh5 g6 12. Qf3 Nxe5 13. dxe5

[Assistant] Bxc3


[System] You are a chess 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. d4 dxe4 4. Nxe4 Nxe4 5. f3 Nf6 6. Ne2 Bd7 7. c3 e6 8. Be3 c5 9. Bf2 cxd4

[Assistant] Qd2


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 e5 6. Nb3 Be6 7. c4 Nbd7 8. Nc3 Rc8 9. Be3 Be7 10. Nd5 O-O 11. Nxe7+ Qxe7 12. Rc1 Nc5 13. Qd2 Rfd8 14. Be2 a6 15. O-O Bd7 16. Rfd1 Bc6 17. Qe1 Ne6 18. Qf2 Nh5 19. c5 dxc5 20. Rxd8+ Rxd8 21. Nxc5 Nhf4 22. Nxe6 Nxe6 23. Rd1 Nd4 24. Bxd4 exd4 25. Rxd4 Re8 26. Qe3 h6 27. Qd2 Qc5 28. Kf1 Qb6 29. Bc4 Qc7 30. Bd5 Bd7 31. Bxf7+ Kxf7 32. Rxd7+ Re7 33. Rxc7 Rxc7 34. Qd5+ Ke7 35. Qe5+ Kd7 36. Qxc7+ Kxc7 37. Ke2 Kd6 38. Ke3

[Assistant] Kc5


[System] You are a chess 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. d3 Nf6 4. Nbd2 g6 5. c3 Bg7 6. a4 O-O 7. Qc2 b6 8. Be2 Bb7 9. Nf1 Nbd7 10. Ng3 e6 11. O-O d5 12. Bf4 dxe4 13. dxe4 Ng4 14. Rfd1 Re8 15. h3 e5 16. Bg5 Ngf6 17. Nd2 h6 18. Bxf6 Nxf6 19. Nc4 Qc7 20. Ne3 Red8 21. Bc4 a6 22. f3 Bc6 23. Rxd8+ Rxd8 24. Rd1 Rxd1+ 25. Qxd1 b5 26. axb5 axb5 27. Bd5 Qb6 28. Bxc6 Qxc6 29. Nd5 Qd6 30. Nxf6+ Qxf6

[Assistant] Nf1


[System] You are a chess 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 e5 6. Ndb5 d6 7. a4 Nb4 8. Bg5 a6 9. Na3 Be6 10. Nc4 Rc8 11. Bxf6 gxf6 12. Ne3 Bh6 13. Qh5 Bxe3 14. fxe3 Nxc2+

[Assistant] Kd2


[System] You are a chess 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. Bf4 d5 3. e3 Nf6 4. Nf3 Nbd7 5. Nbd2 g6 6. c4 Bg7 7. Bd3 O-O 8. h3 dxc4 9. Bxc4 Nb6 10. O-O Nxc4 11. Nxc4 Be6 12. Nce5 Bd5 13. Rc1 Nd7 14. Re1 Bxf3 15. Nxf3 Qb6 16. Qb3 Qxb3 17. axb3

[Assistant] Rfd8


[System] You are a chess 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. c4 Bg7 4. Nc3 O-O 5. Bf4 d5 6. e3 c5 7. h3 cxd4 8. exd4 dxc4 9. Bh2 b5 10. Nxb5 Qa5+ 11. Nc3 Nd5 12. Rc1 Ba6 13. Be2 Nc6 14. O-O Rfd8 15. Nxd5 Rxd5 16. Bxc4 Bxc4 17. Rxc4 Qb5 18. Rc2 Nxd4 19. Nxd4 Bxd4 20. Rd2 Rad8 21. Qc2 Bf6 22. Rfd1 Rxd2 23. Rxd2 Rxd2 24. Qxd2 Qxb2 25. Qxb2 Bxb2 26. Kf1 Kf8 27. Ke2 Ke8 28. Kd3 Kd7 29. Kc4 Bf6 30. Bb8 Kd8 31. Bxa7 Kd7 32. Bc5 Kc6 33. a3 e5 34. a4 Bd8 35. Bb4 f5 36. Bc3 e4 37. Kb3 Bb6 38. a5 Bxf2 39. Kc4 Ba7 40. Bd4 Bxd4 41. Kxd4 Kb5 42. g4 Kxa5 43. gxf5 gxf5 44. h4

[Assistant] Kb4


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

[User] FEN: 8/7p/6p1/8/2k1K1P1/1p5P/1B3P2/4n3 b - - 0 42

[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. Nc3 g6 2. Nf3 Bg7 3. e4 e6 4. d4 Ne7 5. e5 O-O 6. h4

[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: rq3rk1/pp2bppp/2np2b1/4p3/2B1n1PN/2N1B2P/PP2QP2/R2R2K1 w - - 0 18

[Assistant] Nxg6


[System] You are a chess 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 f5 3. Bg2 Nf6 4. Nc3 Be7 5. d3 O-O 6. e3 d6 7. Nge2 Qe8 8. O-O Nc6 9. Rb1 a5 10. a3 Qh5 11. b4 axb4 12. axb4 e5 13. f4 Kh8 14. b5 Nd8 15. h3 Nf7 16. Bb2 g5 17. Nd5 Bd8 18. Nec3 Qh6 19. Nxf6 Bxf6

[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] FEN: 3q2k1/3N1p1p/6p1/r7/3Q2P1/7P/5PK1/8 w - - 0 43

[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: b4rk1/p2npp2/1p3qpp/3P4/2N1P3/1P1Q2P1/P1r2PBP/1R2R1K1 b - - 10 26

[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 e6 2. d4 d5 3. e5 b6 4. b3 Ba6 5. c4 Bb4+ 6. Bd2 Nd7 7. Bxb4 c5 8. Bc3 Ne7 9. Nf3 dxc4 10. Bxc4 Bb7 11. O-O O-O 12. Nbd2 Rc8 13. Re1 a6 14. Ne4 b5 15. Bd3 b4

[Assistant] Bd2


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

[User] 1. e4 c5 2. Nc3 e6 3. f4 d5 4. Nf3 Nc6 5. e5 h5 6. Ne2 Nh6 7. c3 d4 8. d3 Nf5 9. c4 Be7 10. Ng3 Bh4 11. Nxh4 Qxh4 12. Qf3 Nb4 13. Kd1 Qg4 14. Ne4 Qxf3+ 15. gxf3 b6 16. a3 Nc6 17. Bd2 a6 18. Bh3 g6 19. Bxf5 exf5 20. Nd6+ Ke7 21. b4 Be6 22. Ke2 Rab8 23. Rab1 f6 24. bxc5 bxc5 25. Nb7 fxe5 26. Nxc5 a5 27. fxe5 Nxe5 28. Bf4 Rxb1 29. Rxb1 Nd7 30. Rb7 Rc8 31. Nb3 Kf6

[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] 1. d4 e6 2. Nf3 Nf6 3. c4 d5 4. Nc3 c6 5. e3 Ne4 6. cxd5 cxd5 7. Nxe4 dxe4 8. Nd2 f5 9. f3 Nc6 10. fxe4 fxe4 11. Nxe4 Qh4+ 12. Ng3 Bd6 13. Qf3 Rf8 14. Qe2 Bxg3+ 15. hxg3

[Assistant] Qxh1


[System] You are a chess 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. h4 Bg7 3. h5 gxh5 4. e4 d5 5. e5 c5 6. c3 Nc6 7. Be3 cxd4 8. cxd4 Nh6 9. Qxh5 Nf5 10. Qg5 h6 11. Qf4 Qb6 12. Nd2 Nfxd4 13. Ngf3 Nc2+ 14. Kd1 Nxe3+ 15. fxe3 Qxb2 16. Rb1 Qxa2 17. Bd3 e6 18. Ke2 Qa3 19. Rb3 Qe7 20. Rc1 f6 21. exf6 Qxf6 22. Qc7 O-O 23. Qd6 Ne5 24. Rc7

[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: 8/p7/1kp2R2/3p4/3P1N2/2P3Pp/P3rPb1/6K1 b - - 6 34

[Assistant] Re1+


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

[User] 1. d4 c6 2. c4 d5 3. cxd5 cxd5 4. Nc3 Nf6 5. Nf3 Nc6 6. Bf4 e6 7. e3 Be7 8. Bd3 O-O 9. O-O Bd7 10. h3 Rc8

[Assistant] Rc1


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

[User] 1. a3 e5 2. c4 Nf6 3. Nc3 d5 4. cxd5 c6 5. dxc6 Nxc6 6. e3 Bc5 7. Nf3 e4

[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] FEN: 1k1r3r/1P4p1/1Qp2p2/6q1/2P5/3P1n2/5R1P/1R3K2 w - - 2 35

[Assistant] Qa7+


[System] You are a 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: 8/8/8/3k1p2/4R2p/5K2/5P2/8 b - - 0 58

[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] 1. e4 c6 2. Nc3 d6 3. d4 g6 4. f4 Bg7 5. Nf3 Bg4 6. e5 Bxf3 7. Qxf3 e6 8. Bd3 d5 9. g4 h6 10. f5 gxf5 11. gxf5 Qh4+ 12. Qf2 Qxf2+ 13. Kxf2 c5 14. f6 Bf8 15. Be3 cxd4 16. Bxd4 Nc6 17. Bb5 h5 18. Ne2 Nh6 19. Ng3 Ng4+ 20. Kf3 Nh6 21. Nxh5 Nf5 22. Ng7+ Bxg7 23. fxg7 Nxd4+ 24. Ke3 Rg8 25. Rag1 Nf5+ 26. Kf3 Rxg7 27. Rxg7 Nxg7 28. Rg1 Kf8 29. Kf4 Nf5 30. h4 Ke7 31. h5 Ncd4 32. Bd3 Rh8 33. c3 Nc6 34. Bxf5 exf5 35. Rh1 Ke6 36. h6 Nxe5 37. h7 Ng6+ 38. Kg5 Ke7 39. Kh6 Kf8 40. Rd1 Ne7 41. Re1 f4 42. Rf1 Nf5+ 43. Kg5 Ng7 44. Rxf4 Ne6+ 45. Kf5 Nxf4 46. Kxf4 Rxh7 47. Ke5 Rh2 48. Kxd5 Rxb2 49. Kd4 Rxa2 50. c4 Ra3 51. c5 Ra4+ 52. Kd5 Ra6 53. c6 Rxc6 54. Kd4 a5 55. Kd5 a4 56. Kd4 a3 57. Kd5 a2 58. Kd4 a1=Q+ 59. Ke4 Qa5 60. Kf4 Rb6 61. Kg4 Rb4+

[Assistant] Kg3


[System] You are a chess 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 d5 2. Nf3 e6 3. d4 Nf6 4. e3 Be7 5. Bd3 O-O 6. O-O b6 7. Ne5 Bb7 8. c3 Nbd7 9. Bd2 c5 10. Be1 a6 11. Nd2

[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] FEN: r5k1/1R5p/p1B3p1/5p2/3b4/3P3P/PP4P1/2K5 b - - 0 36

[Assistant] Rc8


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

[User] 1. d4 Nc6 2. c3 e5 3. e3 exd4 4. exd4 d5 5. Nf3 Nf6 6. Bd3 g6

[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. e3 g6 2. d4 Bg7 3. Nf3 b6 4. Be2 Bb7 5. O-O d6 6. c4 e6 7. Nc3 Ne7 8. Bd3 O-O 9. Re1 Nd7 10. e4 e5 11. Be3 f5 12. exf5 gxf5 13. dxe5 dxe5 14. Ng5 Rf6 15. f4 e4 16. Bf1 Rg6 17. c5 Nf6 18. Bc4+ Ned5 19. Bd4 c6 20. Qb3 b5 21. Bxf6 Bxf6 22. Rad1 Bxc3 23. bxc3 h6 24. Nh3 Qh4 25. Bxd5+ cxd5 26. Rxd5 Kh8 27. Re3 Rag8 28. Rd2 a6 29. c4 Qe7 30. cxb5 Qxc5 31. Qc3+ Qxc3 32. Rxc3 e3 33. Rxe3 Rxg2+ 34. Rxg2

[Assistant] Rxg2+


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

[User] 1. e3 g6 2. d4 Bg7 3. Nf3 d6 4. Be2 e6 5. O-O Ne7 6. b3 O-O 7. Bb2 b6 8. Nbd2 Bb7 9. c4 Nd7 10. Qc2 c5 11. Rad1 Rc8 12. dxc5 bxc5 13. Bxg7 Kxg7 14. Ne1 Nf6 15. Bf3 Qc7 16. Bxb7 Qxb7 17. Nef3 Rfd8 18. Rfe1 d5 19. cxd5 exd5 20. Nf1 Nf5 21. Ng3 Nxg3 22. hxg3 Ne4 23. Nd2 Re8 24. Nxe4 dxe4 25. Rd2 Qc6 26. Red1 Re6 27. Qc3+ Kg8 28. Qc4 Rce8 29. Rd7 R6e7 30. Rxe7 Rxe7 31. Rd8+ Re8 32. Rxe8+ Qxe8 33. Qxc5 Qd7 34. Qd4 Qxd4 35. exd4 f5 36. Kf1 Kf7 37. Ke2 Ke6 38. Ke3 Kd5 39. f3 a5 40. fxe4+ fxe4 41. a3 g5 42. b4 axb4 43. axb4 h5 44. b5 h4 45. gxh4 gxh4 46. b6 Kc6 47. Kxe4 Kxb6 48. Ke5 Kc7

[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. d4 e6 2. Nf3 d6 3. c3 c5 4. Nbd2 cxd4 5. cxd4 Nf6 6. g3 g6 7. Bg2 Bg7 8. O-O O-O 9. e4 d5 10. e5 Ne4 11. Nxe4 dxe4 12. Ng5 Nc6 13. Nxe4 Qxd4 14. Nf6+ Bxf6 15. exf6 Qxf6 16. Bh6 Rd8 17. Qe2 Nd4 18. Qe3 b6 19. Bg5 Nc2 20. Bxf6 Nxe3 21. fxe3 Rd2 22. Rf2 Rxf2 23. Kxf2 Rb8 24. Be5 Rb7 25. Bxb7 Bxb7 26. Bf6 Bd5

[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] FEN: 4r1k1/ppq2pp1/2p4p/3nr3/8/1Q2B2P/PP3PP1/2RR2K1 w - - 2 24

[Assistant] Rxd5


[System] You are a 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: 1kr5/ppR5/4R3/2N1nppq/8/5B2/PPP1KPP1/7q w - - 0 29

[Assistant] Rxb7+


[System] You are a 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: 2r3k1/1p3rbp/4N3/p1pPp2n/P4p2/2N3P1/1P2RPKP/3R4 b - - 2 26

[Assistant] f3+


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

[User] FEN: 8/4k3/4p3/3p1p2/1PpP2p1/2P3P1/5PK1/8 w - - 1 42

[Assistant] Kf1


[System] You are a chess 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 d5 6. c3 b6 7. Bg5 Bb7 8. Nbd2 Nbd7

[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. e4 d5 2. Nc3 d4 3. Nce2 d3 4. cxd3 c5 5. Nc3 Nc6 6. g3 e5 7. Nf3 Be6 8. Bg2 Qxd3 9. Qe2 Qxe2+ 10. Kxe2 O-O-O 11. d3 f6 12. Be3 Nd4+ 13. Bxd4 cxd4 14. Nd5

[Assistant] Kb8