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

[User] 1. g3 c6 2. Bg2 d5 3. e3 e6 4. Ne2 Nf6 5. O-O Be7 6. c4 O-O 7. cxd5 Nbd7 8. b3 exd5 9. Bb2 Bd6 10. d3 Be5 11. Nd2 Bxb2 12. Rb1 Be5 13. Nf4 d4 14. exd4 Bxf4 15. gxf4 Nd5 16. Bxd5

[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. c4 d5 2. g3 d4 3. Bg2 c5 4. Nf3 Nc6 5. O-O h5

[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. Nf3 b5 2. e4 Bb7 3. d3 e6 4. Be2 c5 5. O-O Nc6 6. Nc3 b4 7. Nb1 Nf6 8. Bf4 d5 9. exd5 Nxd5 10. Bg3 h5 11. h3

[Assistant] Be7


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

[User] 1. e4 c5 2. c4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2 e6 6. Nge2 Nge7 7. O-O O-O 8. d3 Nd4 9. Rb1 a6 10. a3 b5 11. cxb5 axb5 12. b4 Nxe2+ 13. Nxe2 cxb4 14. axb4 Bb7 15. Bb2 Nc6 16. Bxg7 Kxg7 17. d4 Qf6 18. e5 Qe7 19. Nc3 Rab8 20. Nxb5 Nxb4 21. Bxb7 Rxb7 22. Nd6 Rb6 23. Rb3 Rfb8 24. Qd2 Nd5 25. Rxb6 Rxb6 26. Rc1 Rxd6 27. exd6 Qxd6 28. Qe2 f6 29. Qc4 h5 30. Qc5 Qxc5 31. dxc5 Kf7 32. c6 dxc6 33. Rxc6 e5 34. Kg2 f5 35. Kf3 e4+ 36. Ke2 Nf6 37. h3 Nd5 38. Rd6 Nf6 39. Ke3 g5 40. Kd4 f4 41. gxf4 gxf4 42. Ke5 Ne8

[Assistant] Rd7+


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

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. a3 Bc5 7. Nb3 Ba7 8. Qf3 Nc6 9. Be3 Bxe3 10. Qxe3 Nf6 11. O-O-O b5 12. f4 d6 13. Be2 Bb7 14. g4 h6 15. g5 Nd7 16. Bh5 g6 17. Bg4 h5 18. Bf3 O-O-O 19. f5 Nde5 20. Bg2 Nc4 21. Qe2 N6e5 22. Bh3

[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] FEN: r3kb1r/ppq1nppp/4p3/3pPn2/8/P1N2N2/1P3PPP/R1BQ1RK1 w kq - 2 12

[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. d4 d5 2. Nf3 Nf6 3. e3 c5 4. c3 Nbd7 5. Nbd2 g6 6. Be2 Bg7 7. O-O O-O 8. b4 c4 9. Qc2 e5 10. Nxe5 Nxe5 11. dxe5 Nd7 12. f4 Qb6 13. Nf3 a5 14. Rb1 f6 15. exf6 Nxf6 16. a3 Bf5 17. Qb2 Bxb1 18. Qxb1 Ne4 19. Nd4 Nxc3 20. Qc2 Bxd4 21. exd4 Qxd4+ 22. Kh1 Nxe2 23. Qxe2 Rae8 24. Qg4 Qd3 25. Kg1 d4

[Assistant] Qd7


[System] You are a chess 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 e6 3. d4 d5 4. exd5 Qxd5 5. Nf3 cxd4 6. Qxd4 Nf6 7. Bc4 Qxd4 8. Nxd4 a6 9. a4 Bd6 10. Bg5 Ne4 11. Be3 Bd7 12. f3 Nf6 13. Nd2 Nc6 14. O-O O-O 15. Rfd1 Bc5 16. N2b3 Bxd4 17. Nxd4 Nxd4 18. Bxd4 Bc6 19. a5 Rfd8 20. Kf2 Kf8 21. Bxf6 gxf6 22. Bd3 h6 23. f4 Ke7 24. g3 Rd6 25. Be2 Rad8 26. Ke3 Rxd1 27. Rxd1 Rxd1 28. Bxd1 Kd6 29. Bh5 Be8 30. b4 e5 31. Ke4 Bd7

[Assistant] Bxf7


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

[User] FEN: r4rk1/pp4p1/2B3qp/2bNp3/4P1b1/5N2/PPP2PPP/R2Q1RK1 b - - 0 13

[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. Nf3 c5 2. g3 e6 3. Bg2 Nf6 4. O-O Be7 5. d3 O-O 6. e4 d5 7. Nbd2 dxe4 8. dxe4 e5 9. Nc4 Nc6 10. Qxd8 Be6 11. Qxe7 Rfd8 12. Qxd8+ Rxd8 13. Ncxe5 Rf8 14. Nxc6 bxc6

[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: 1k5r/n1pQ2p1/p3P2p/1pbN4/5P2/6Pq/PPP4P/R1B2R1K b - - 4 23

[Assistant] Qxf1#


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

[User] FEN: r1b2rk1/pp3pbp/n5p1/q2Pp3/4PnP1/4BN1P/PP1QN3/R3KB1R b KQ - 2 14

[Assistant] Nd3+


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

[User] FEN: 1r5k/7p/p2p3r/1p1BbQ2/8/2P3q1/PP2R2P/5R1K w - - 3 32

[Assistant] Qf8+


[System] You are a chess 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 Ne7 3. Nc3 d6 4. f4 Nd7 5. Nf3 a6 6. Bd3 b6 7. O-O Bb7 8. f5 e5 9. Ng5 Ng8 10. Qh5 Qe7

[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. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 e6 6. Be2 Nc6 7. O-O Be7 8. Be3 cxd4 9. cxd4 O-O 10. Nc3 Qd8 11. a3 Nd5 12. Nxd5 Qxd5 13. Rc1 Bf6 14. Bc4 Qd8 15. Qd3 Ne7 16. Ba2 Bd7 17. Bb1

[Assistant] g6


[System] You are a chess 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/p7/3Pk3/1p2P2q/2p5/7Q/PP4PK/8 b - - 6 56

[Assistant] Qxh3+


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

[User] 1. e4 c5 2. Nc3 e6 3. g3 a6 4. Bg2 b5 5. Nge2 Bb7 6. O-O d5 7. exd5 exd5 8. d4 c4

[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: 8/k7/p1pp4/5p2/P3q3/1Q5P/1P3P2/K7 w - - 0 42

[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: r7/6k1/3p2p1/2p2p2/1p1q1P1Q/1P1P1R2/r1P3P1/2R4K b - - 1 30

[Assistant] Rh8


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

[User] 1. d4 c6 2. Nf3 c5 3. Bg5 cxd4 4. Qxd4 d6 5. Qd2 Nc6 6. Nc3 h6 7. Bh4 Nf6 8. Bxf6 gxf6 9. e4 e6 10. Be2 Be7 11. O-O O-O 12. Qxh6 Ne5 13. Nxe5

[Assistant] fxe5


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

[User] 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 c6 5. Nf3 Bg4 6. Bd3 Bxf3 7. Qxf3 Nd7 8. Bd2 Qb6 9. e5 Qxd4 10. exd6 Qxd6 11. O-O-O Ngf6 12. g4 h5 13. h3 Nd5 14. Ne4 Qc7 15. Rhe1 O-O-O 16. f5 hxg4 17. hxg4 Ne5 18. Qg2 Nxd3+ 19. cxd3 Qb6 20. Nc3 Nxc3 21. Bxc3 Bxc3 22. bxc3

[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. d4 d5 2. Nf3 Nf6 3. e3 c6 4. Bd3 Bg4 5. Nbd2 e6 6. O-O Bd6 7. c4 Bc7 8. cxd5 exd5 9. Qb3 b6 10. Ne5 Be6 11. f4 O-O 12. Rf3 c5 13. Qc2 cxd4 14. exd4 Nbd7 15. Nc6 Qe8 16. f5 Nc5 17. fxe6 Qxc6 18. exf7+ Rxf7 19. dxc5 bxc5 20. b3 Qd6 21. Nf1 Re7 22. Bg5 Rf8 23. Bxf6 Rxf6 24. Bxh7+ Kf8 25. Rxf6+ Qxf6 26. Qf2 Bf4 27. Rd1 d4 28. g3

[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] FEN: 3r1r2/4P3/p1p4k/2p1p2p/P1P1N3/1P2R1Pb/5R1P/7K b - - 0 34

[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: 3r4/p4k2/1p2p1p1/2p2p1p/Pnn2P1P/2BP4/2P5/2KB1NR1 b - - 1 36

[Assistant] Na2+


[System] You are a chess 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 c6 3. g3 d5 4. Bg2 g6 5. Nge2 Bg7 6. d3 Ne7 7. exd5 exd5 8. O-O O-O 9. h3 h6 10. Kh2 Nd7 11. Be3 Re8 12. d4 Nf5 13. Bf4 Nf6 14. Re1 Nd6 15. Ng1 Bf5 16. g4 Be6 17. Nf3 g5 18. Bg3 Nfe4 19. Nxe4 Nxe4 20. Be5 f6 21. Bg3 Nxg3 22. fxg3 Qd6 23. c3 Re7 24. Qd3 Rae8 25. Re2 Qd7 26. Rae1 Bf7 27. Ng1 h5 28. Qf5 Qxf5 29. gxf5 Rxe2 30. Rxe2 Rxe2 31. Nxe2 Bf8 32. g4 Bd6+ 33. Kg1 h4 34. Kf2 Kf8 35. Ke3 Ke7 36. b3 b6 37. Kd3 c5 38. c4

[Assistant] dxc4+


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

[User] FEN: 8/2k5/6p1/7p/5PP1/8/5K2/8 w - - 1 43

[Assistant] f5


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

[User] 1. d4 c5 2. d5 Nf6 3. c4 d6 4. Nc3 a6 5. e4 g6 6. f4 Bg7 7. Nf3 O-O 8. Bd3 Nfd7 9. O-O e6 10. Qe2 e5 11. f5 gxf5 12. exf5

[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: 1q4k1/2pb1ppp/r1Np4/4r3/1P6/P2BP2N/6PP/2K4R w - - 0 22

[Assistant] Nxb8


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

[User] 1. e4 d5 2. exd5 c6 3. Nc3 cxd5 4. d4 Nc6 5. Nf3 Bg4 6. Bb5 e6 7. Bxc6+ bxc6 8. h3 Bh5 9. g4 Bg6 10. Ne5 Rc8 11. f4 Qh4+ 12. Kf1 Nf6 13. Kg2 Ne4 14. Be3 Nxc3 15. bxc3 Be4+ 16. Kh2 h5 17. Nf3 Bxf3 18. Qxf3

[Assistant] hxg4


[System] You are a chess 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 g6 4. f3 Bg7 5. Bg5 c6 6. Bxf6 Bxf6 7. a4 a5 8. Bc4 Na6 9. Nge2 d5 10. exd5 cxd5 11. Nxd5 Be6 12. Nxf6+ exf6 13. Bxe6 fxe6 14. O-O O-O 15. c3 Nc7 16. Qb3 Qd5 17. Qxd5 exd5 18. Rfe1 Rfe8 19. Nf4 Kf7 20. Kf2 b5 21. Nd3 b4 22. cxb4 axb4 23. Nxb4 Rab8 24. Nc6 Rxb2+ 25. Kg3

[Assistant] h5


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

[User] 1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. dxe5 dxe5 5. Bd3 Nbd7 6. Nf3 Be7

[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. c4 e5 2. Nc3 d6 3. g3 f5 4. Bg2 Nf6 5. e3 c6 6. Nge2 Be7 7. d4 e4 8. O-O O-O 9. b3 Na6 10. Bb2 d5 11. a3 Nc7 12. f3 exf3 13. Bxf3 g6

[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. b4 Nf6 2. Bb2 e6 3. a3 d5 4. e3 a5 5. b5 c5 6. g4 Bd6 7. g5 Ne4 8. d3 Qxg5

[Assistant] dxe4


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

[User] 1. e4 d6 2. d4 g6 3. Nc3 Bg7 4. Be3 Nf6 5. Qd2 Nc6 6. f3 e5 7. Bb5 exd4 8. Bxc6+ bxc6 9. Bxd4 O-O 10. Nge2 c5 11. Be3 Ba6 12. O-O Bxe2 13. Qxe2 a5 14. Rad1 c6 15. Bxc5 Ne8 16. Bd4 Bxd4+ 17. Rxd4 Qf6 18. Rfd1 Rb8 19. b3 c5 20. Nd5 Qg7 21. Ne7+ Kh8 22. R4d3 a4 23. Nd5 axb3 24. axb3 f5 25. exf5 Rxf5 26. Re3 Rf8 27. Re7 Qb2 28. Qd2 Ng7 29. Qh6 Rg8 30. Nf4 Qf6 31. Rde1 Rbf8 32. g3 g5 33. Qxf6 Rxf6 34. Nd5 Rxf3 35. Kg2 g4

[Assistant] R1e4


[System] You are a chess 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. c4 e6 5. Nc3 Be7 6. Bd3 Nbd7 7. g4 dxc4 8. Bxc4 b5 9. Bd3 Bb7 10. g5 Nd5 11. h4 Nxc3 12. bxc3 a6 13. e4 c5 14. Be3 c4 15. Bc2 Qa5 16. Qd2 Rc8 17. h5 Nb6 18. Ke2 Na4 19. Bxa4 Qxa4 20. g6 f6 21. d5 exd5 22. exd5 Rd8 23. h6 gxh6 24. g7 Rg8 25. Nd4

[Assistant] Bxd5


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

[User] FEN: 2r1r1k1/3n3p/ppB1p1p1/4Pp2/Q2P1q2/5P2/P4P1P/1R3R1K b - - 1 23

[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. f4 e6 2. Nf3 Nc6 3. g3 Nf6 4. Bg2 d5 5. O-O Ne4 6. d3 Bc5+ 7. e3 Nf6 8. d4 Bb4 9. c3 Bd6 10. Ne5 O-O 11. h3 Bd7 12. Nd2 Nxe5 13. fxe5 Bb5 14. exd6 Bxf1 15. dxc7 Qxc7 16. Nxf1 Rad8 17. Qe2 Qc6 18. Bd2 Qc7 19. e4 Nxe4 20. Bxe4 dxe4 21. Qxe4 Rd5 22. Bf4 Qc4 23. a3 Rfd8 24. Re1 Rb5 25. Re2 a6 26. Qg2 Qd3 27. Rd2 Qb1 28. Kh2 Qe1 29. Ne3 Rh5 30. Rd1 Rxh3+ 31. Kxh3 Qxd1 32. Nxd1 b6 33. Qb7 b5 34. Qxa6 e5 35. Bxe5 f6 36. Qb6 Ra8 37. Qc6 Rd8 38. Bc7 Rf8 39. Qxb5 Kf7 40. Qc4+ Kg6 41. Bd6 Re8 42. Qd5 h6 43. Nf2 Re1 44. Qe4+ Rxe4 45. Nxe4 Kf5

[Assistant] Nc5


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

[User] 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 Nf6 5. Nf3 O-O 6. e5 Ne8 7. Bc4 dxe5 8. fxe5 Nc6 9. Be3 Na5 10. Bd3 c5 11. dxc5 Nc6 12. Bf4 Nc7 13. Qe2 Ne6 14. Bg3 Nxc5 15. O-O Nxd3 16. cxd3 Bf5 17. Rad1 Qb6+ 18. Kh1 Rad8 19. d4 Nxd4 20. Nxd4 Rxd4 21. Bf2 Rxd1 22. Bxb6

[Assistant] Rxf1+


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

[User] 1. Nf3 d6 2. d4 f5 3. c4 Nf6 4. Nc3 Ne4 5. Bf4 Nxc3 6. bxc3 e6 7. e3 Be7 8. h3 O-O 9. Bh2 Nc6 10. Be2 Bf6 11. O-O e5 12. Re1 e4 13. Nd2 Ne7 14. Nb3 b6 15. a4 c5 16. a5 Be6 17. a6 Rc8 18. Qc2 Ng6 19. d5 Bf7 20. Nd2 Ne5 21. f4 exf3 22. gxf3

[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] FEN: 8/5pk1/6pp/1R6/P5RK/5P1P/6r1/6r1 b - - 1 46

[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] FEN: 6k1/1b3pbp/6p1/1N4q1/1Q1p4/P7/5PPP/2r1RBK1 w - - 1 28

[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. e3 d5 2. d4 e6 3. g3 Nf6 4. Bg2 Be7 5. h3 O-O 6. Ne2 c5 7. O-O cxd4 8. exd4 Nc6 9. c3 e5

[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 d6 2. e4 c6 3. Bd3 Nd7 4. c4 Qc7 5. Nc3 e5 6. d5 Ngf6 7. Nge2 Be7 8. O-O O-O 9. f4 Qb6+ 10. Kh1 Ng4 11. Qe1 Ne3 12. Bxe3

[Assistant] Qxe3


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

[User] 1. e4 g6 2. Nc3 Bg7 3. d4 d6 4. Nf3 a6 5. Be3 b5 6. h4 h5 7. a3 Bb7 8. Bd3

[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. Nf3 d6 2. d4 Nf6 3. Nc3 g6 4. e4 Bg7 5. Bc4 O-O 6. O-O Nbd7 7. e5 Ne8 8. e6 Nb6 9. exf7+ Kh8 10. Bb3 Nf6 11. Ng5 d5 12. Re1 c6 13. a4 a5 14. Bf4 Bf5 15. h3 h5 16. f3 e6 17. g4 hxg4 18. hxg4 Nh7 19. Nxh7 Kxh7 20. gxf5 gxf5 21. Kf2 Qh4+ 22. Bg3 Bxd4+ 23. Kg2 Qg5 24. Qxd4 f4 25. Rh1+ Kg6 26. Qxf4

[Assistant] Qxf4


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

[User] 1. e4 d6 2. Nc3 g6 3. f4 Bg7 4. Nf3 Nc6 5. Bc4 e6 6. Bb3 Nge7 7. d3 Na5 8. O-O Nxb3 9. axb3 O-O 10. Qe1 f5 11. Qh4 h6 12. e5 Nc6 13. Qg3 Kh7 14. Nh4 Qe8 15. Nb5 Qf7 16. exd6 Nd4 17. Nxd4 Bxd4+ 18. Kh1 cxd6 19. c3 Bf6 20. d4 b6 21. Nf3 Bb7 22. Re1 Be4 23. Bd2 Rg8 24. Qf2 Qb7 25. Rf1 Kg7 26. b4 Kf7 27. b5 a5 28. Be3 Rgc8 29. Nd2 Qd5 30. c4 Qb7 31. b3 d5 32. Rae1

[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] FEN: r1bqr1k1/p5bp/2p2pp1/2Bp4/5P1n/2N2B2/PPP3PP/R2QR1K1 w - - 6 17

[Assistant] Bxd5+


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

[User] 1. e4 g6 2. d3 Bg7 3. Nc3 c5 4. Bd2 Nc6 5. Nf3 h5 6. Be2 d6 7. O-O Nf6 8. h3 O-O 9. Be3 e5 10. Qd2 d5 11. exd5 Nd4 12. Nxe5 Nxd5 13. Nxd5 Bxe5 14. Nc3 Nxe2+ 15. Qxe2 Bg7 16. Bxc5 Re8 17. Qf3 Be6 18. Rae1 Rc8 19. Ba3 b6 20. Ne4 Bd5 21. Qf4 f5 22. Ng5 Bh6 23. Rxe8+ Qxe8 24. Qh4 Qd8 25. f4 Bxg5 26. fxg5 Rxc2 27. Qd4

[Assistant] Rxg2+


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

[User] 1. e4 d5 2. exd5 c6 3. Nc3 cxd5 4. Nf3 Nc6 5. d4 Nf6 6. Be2 e6 7. O-O

[Assistant] Bd6


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

[User] 1. e4 e5 2. f4 d5 3. exd5 e4 4. Nc3 Nf6 5. Bc4 Bb4 6. Nge2 O-O 7. O-O c6

[Assistant] dxc6


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

[User] FEN: 8/1p3k1p/6p1/5p2/P1n1PP2/2BbP2P/6K1/3B4 b - - 0 39

[Assistant] Nxe3+


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

[User] 1. d4 e5 2. Nf3 e4 3. Ng5 d5 4. h4 Nf6 5. c4 h6 6. Nh3 dxc4 7. Nf4 Bb4+ 8. Bd2 Nc6 9. e3 Bg4 10. Be2 Bxe2 11. Qxe2 Bxd2+ 12. Qxd2 b5 13. a4 a6 14. Nc3 Nb4 15. O-O c6 16. axb5 axb5 17. Nxb5 Nd3 18. Rxa8 cxb5

[Assistant] Rxd8+


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

[User] FEN: 2kr1b1r/pp1b1ppp/1qn1p3/4P3/3N4/4B3/PPB1QPPP/R4RK1 b - - 0 15

[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 c5 2. d5 d6 3. c4 g6

[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. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. Nf3 Nf6 5. d4 e6 6. Be2 Be7 7. O-O O-O 8. h3 b6 9. Be3 Bb7 10. Ne5 Nbd7 11. Bf3 Qc8 12. Nxd7 Nxd7 13. Bxb7 Qxb7 14. d5 exd5 15. Nxd5 Bd6 16. Bf4 Bxf4 17. Nxf4 Ne5 18. Re1 Rad8 19. Qh5 Ng6 20. Nxg6 hxg6 21. Qh4 c5 22. c3

[Assistant] Qd5


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

[User] FEN: 5q1k/1Q4pp/p7/P7/1PN5/8/r5PP/4R1K1 b - - 2 34

[Assistant] Qf2+


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

[User] FEN: r2qk2r/pp1bnp2/7p/3p2p1/Q1Nb1p2/3B3P/PP2R1P1/R1B2K2 w kq - 2 21

[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 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 Bb6 6. Nc3 Qh4 7. Qe2 Nd4 8. Nxd4 Bxd4 9. Bd2 Ne7 10. g3 Qf6 11. Bg2 O-O 12. O-O-O c6 13. f4 d5 14. e5 Qg6 15. h3 Qxg3 16. Be1 Qe3+ 17. Kb1 Qxe2 18. Nxe2 Bb6 19. c4 dxc4 20. Bb4 c5 21. Bc3 Nf5 22. Be4 Be6 23. Bxf5 Bxf5+ 24. Kc1 Bd3 25. Ng3 g6 26. h4 Rad8 27. h5 Bc7 28. Rdg1 a5 29. hxg6 fxg6 30. Nh5 b5 31. Nf6+ Rxf6 32. exf6 Bxf4+ 33. Kd1 g5 34. Rh4 Kf7 35. Rxf4 Bg6+ 36. Ke1 gxf4 37. Bxa5 Ra8 38. Bc3 Rxa2 39. Rg4 b4 40. Be5 c3

[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: 1r6/5R1p/4p1p1/6P1/5Pk1/2p5/1P4KP/8 w - - 0 30

[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 c6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Nf6 5. Ng3 h5 6. h4 Bg4 7. Nf3

[Assistant] e6


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

[User] 1. e4 d5 2. d3 dxe4 3. dxe4 Qxd1+ 4. Kxd1 Nc6 5. Ke1 Bd7 6. Bd3 O-O-O 7. Nc3 f5 8. Nf3 fxe4 9. Be3 exd3 10. cxd3 Nf6 11. Ke2 e5 12. Rad1 e4 13. dxe4 Bb4

[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. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. d4 d6 6. Be2 e5 7. O-O Nc6 8. dxe5 Nxe5 9. Nxe5 dxe5 10. Qxd8 Rxd8 11. Be3 c6 12. f3 Be6 13. Rfd1 Bf8 14. Kf2 Be7 15. a3 b6 16. b4 Kf8 17. Rxd8+ Rxd8 18. Rd1 Rxd1 19. Nxd1 Ke8 20. Nb2 Kd7 21. Ke1 Kc7 22. Kd2 Nd7 23. Kc3 c5 24. b5 Nf8 25. Nd1 Bc8 26. Kd3 Ne6 27. Nc3 Nd4 28. Nd5+ Kd6 29. f4 f6 30. Bd1 Be6 31. Nc3 Kd7 32. h3 Bd6 33. fxe5 Bxe5 34. Bg4 f5 35. exf5 gxf5 36. Bh5 f4 37. Bf2 Bf5+ 38. Ne4 Nxb5 39. cxb5 c4+ 40. Kxc4 Bxe4 41. Bf3 Bxf3

[Assistant] gxf3


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

[User] FEN: 3r2k1/6p1/1b2N2p/3q1p2/8/Q1P4P/P4PP1/4R1K1 b - - 0 33

[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 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4

[Assistant] c5


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

[User] 1. e3 Nf6 2. Nf3 g6 3. Bc4 Bg7 4. d4 O-O 5. O-O d6 6. Re1 Nbd7 7. c3 b5 8. Bb3 a5 9. Nbd2 a4 10. a3 axb3 11. Qxb3 e5 12. dxe5 dxe5 13. c4 bxc4 14. Nxc4 Ba6 15. Ncxe5 Rb8 16. Qc3 Nxe5

[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 d5 2. exd5 Nf6 3. Qf3 c6 4. dxc6 Nxc6 5. c3 Bg4 6. Qg3 e6 7. d4 Bd6 8. Bf4 Bxf4 9. Qxf4 O-O 10. Bb5 e5 11. Qg3 exd4 12. Bxc6 bxc6 13. Nf3 Re8+ 14. Kf1 Bxf3 15. Qxf3

[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: r1b2rk1/ppq1ppbp/3p2p1/8/3N4/PBn5/1P3PPP/R1BQ1RK1 w - - 0 14

[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 e6 2. d4 c5 3. Nc3 cxd4 4. Qxd4 Nc6 5. Qe3 b6 6. g3 Bb7 7. Bg2 g6 8. Nge2 Bg7 9. O-O Nge7 10. Kh1 O-O 11. f4 f5 12. e5 Na5 13. Bxb7 Nxb7 14. Qf3 d5 15. Be3 Nc5 16. Rfd1 Qc7 17. Nd4 Qc8 18. Ncb5 Nb7 19. Nd6 Nxd6 20. exd6 Qd7 21. dxe7 Qxe7 22. Re1 Bxd4 23. Bxd4 Rac8 24. c3 b5 25. Qxd5

[Assistant] Rcd8


[System] You are a chess 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/ppp1npbp/3p2p1/8/2n1P3/2N2BB1/PP3PPP/R2QK2R w KQkq - 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. d4 b6 2. e3 Bb7 3. Nf3 e5 4. c4 e4 5. Nfd2 Nf6 6. Nc3 Bb4 7. Qc2 Bxc3 8. bxc3 O-O 9. f3 Re8 10. fxe4 Nxe4 11. Nxe4 Bxe4 12. Bd3 Bxd3 13. Qxd3 d5 14. cxd5 Qxd5 15. O-O Nc6 16. Rf3 Na5 17. Rh3 Qe4 18. Qxe4 Rxe4 19. a4 Rae8 20. Kf2 Nc4 21. Ra2 f5 22. Rf3 g6 23. h3 a5 24. Ra1 Nd6 25. Rb1 R4e6 26. Ke2 Ne4 27. Kd3 Rc6 28. c4 Rd8 29. Bd2 Nc5+ 30. Kc3 Nxa4+ 31. Kb3 b5 32. cxb5 Rb8 33. Kxa4 Rc2 34. Bxa5 Ra2+ 35. Kb4 Ra8 36. Bxc7 R8a4+ 37. Kc5 Rc2+ 38. Kd6 Ra8 39. b6 Ra6 40. Rb5 Kf8 41. e4 Ke8 42. exf5 g5 43. f6 Kf7 44. Re3

[Assistant] Ra4


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

[User] 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. Nf3 Bb4+ 5. Nbd2 Nc6 6. a3 Bxd2+ 7. Nxd2 Nxd2 8. Bxd2 Nxe5 9. e4 Qe7 10. Be2 b6 11. O-O Bb7 12. f4 Nc6 13. Bc3 O-O-O 14. Bf3 f6 15. b4 Rhe8 16. Kh1 g5 17. b5 Nb8 18. e5 fxe5 19. Bxb7+ Kxb7 20. fxe5 Rf8 21. Rxf8

[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. d4 d6 2. c4 g6 3. Nc3 Bg7 4. Nf3 Nf6 5. g3 Nc6 6. Bg2 Bg4 7. d5 Bxf3 8. exf3 Ne5 9. f4 Ned7 10. O-O O-O 11. Be3 Rc8 12. Qb3 b6 13. Qa4 Nc5 14. Qc2 a5 15. b3 Ncd7 16. Rad1 Nc5 17. Nb5 Ng4 18. Bc1 Ra8 19. Rfe1 e6 20. h3 Nf6 21. dxe6 fxe6 22. Bxa8 Qxa8 23. Nxc7 Qc6 24. Nxe6 Nxe6 25. Rxe6 Qf3 26. Qe2 Qc6 27. Bb2 Nh5 28. Bxg7 Nxg7 29. Rexd6 Qe8 30. Qxe8 Nxe8 31. Rxb6 h5 32. Rxg6+ Kf7 33. Rg5 Nf6 34. Rd6 Ke7 35. Ra6 Rd8 36. Rg7+ Kf8 37. Rb7 Ne8 38. Rh6 Kg8 39. Rxh5 Rd1+ 40. Kg2 Rd2 41. Rg5+ Kf8 42. h4 Rxa2 43. h5 Rd2 44. h6 Rd6

[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. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 d5 5. Qb3 Bxc3+ 6. Qxc3 Nbd7 7. f3 c5 8. dxc5 Nxc5 9. Bxf6 Qxf6 10. Qxf6 gxf6 11. cxd5 exd5 12. Kd2 Be6 13. e3 Kd7 14. Ne2 Rac8 15. Nd4 b6 16. g3 a6 17. Be2 b5 18. Rhc1 Na4 19. b3 Nb6 20. f4 f5 21. Bd3 Kd6 22. Nxf5+ Bxf5 23. Bxf5 Rxc1 24. Rxc1 h5 25. h3 h4 26. g4 f6 27. Bd3 Rg8 28. a4 bxa4 29. bxa4 Nxa4 30. Bxa6 Nc5 31. Bd3 Nb3+ 32. Kd1 Nxc1 33. Kxc1 Re8 34. Kd2 d4 35. exd4 Kd5 36. g5 fxg5 37. fxg5 Kxd4 38. g6 Re3 39. Bf5 Rg3

[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. d4 d5 2. Bg5 Nf6 3. Bxf6 gxf6 4. c3 f5 5. Nd2 e6 6. Ngf3 c5 7. e3 Nc6 8. dxc5 Bxc5 9. Bd3 Bd6 10. Qe2 Qc7 11. Nd4 Nxd4 12. exd4 Bd7 13. f4 Bxf4 14. Nf3 O-O-O 15. a4 Kb8 16. a5 Rhg8 17. b4 Qxc3+ 18. Kf2 Qxb4 19. Rhb1 Qd6 20. Ba6 Bc6 21. Rb3 Rd7 22. Rab1 Bxh2

[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. d4 e6 2. e4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nf6 6. Bb5+ Nc6 7. Qe2+ Be7 8. O-O O-O 9. dxc5 Bxc5 10. Nb3 Bg4 11. Nxc5 Nd4 12. Qd3 Nxf3+ 13. gxf3 Bh3 14. Bg5 Qd6 15. Nb3 a6 16. Qd4

[Assistant] axb5


[System] You are a chess 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 Nf6 5. Nxf6+ exf6 6. Ne2 Be6 7. Bf4 Bd6 8. Qd2

[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 c5 2. f4 Nc6 3. Nf3 g6 4. Bb5 Bg7 5. Bxc6 bxc6 6. O-O Nh6 7. d3 O-O 8. Nc3 d6 9. h3 f5 10. Qe1 Nf7 11. Bd2 e6 12. Rb1 Bd7 13. b3 Rb8 14. Na4 Re8 15. c4 Bf6 16. e5 dxe5 17. fxe5 Be7 18. Be3 Qc7 19. Bxc5 Bxc5+

[Assistant] Nxc5


[System] You are a chess 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 Nf6 4. Bxf6 exf6 5. Nxd4 d5 6. Nb3 Be7 7. c3 O-O 8. g3 Nc6 9. Bg2 Bf5 10. Qxd5 Qxd5 11. Bxd5 Rfd8 12. Bxc6 bxc6 13. N1d2 c5 14. c4 Rab8 15. O-O a5 16. Rfd1 a4 17. Nxc5 Bxc5 18. Nf3 Rxd1+ 19. Rxd1 g6 20. Rd2 Be4 21. Ne1 Bf5 22. a3 Be6 23. Rc2 Bd4 24. Nd3 Rc8 25. c5 Bb3 26. Rc1 Rc6 27. Nb4 Rxc5 28. Rxc5 Bxc5 29. e3 Bxb4 30. axb4 Kf8 31. Kf1 Ke7 32. Ke2 Kd6 33. Kd3 Kc6 34. Kc3 Kb5 35. f3 Be6 36. e4 f5 37. e5 g5 38. f4

[Assistant] g4


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

[User] FEN: rn2kb1r/pp3ppp/2p5/q7/2P1n1b1/1P2PN2/PB1NBPPP/R2QK2R b KQkq - 4 12

[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] FEN: r1b2rk1/p1ppnppp/2p5/4Pq2/8/2N5/PPPBQbPP/2KR1B1R w - - 0 11

[Assistant] g4


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

[User] 1. d3 d5 2. Nd2 e5 3. g3 Nf6 4. Bg2 Nc6 5. e4 d4 6. Ngf3 Be6 7. O-O Qd7 8. Re1 Bh3 9. Bh1 h6 10. a4 Bb4 11. Re2 O-O 12. Nc4 Rae8 13. Nh4 Bg4 14. f3 Be6 15. b3 a6 16. Rf2 b5 17. axb5 axb5 18. Nd2 Bc3 19. Ra2 Nb4 20. Ra7 Ra8 21. Rxa8 Rxa8 22. f4 Ng4 23. Re2 Ne3 24. Qe1

[Assistant] Nexc2


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

[User] FEN: r6r/2P1k3/b1Qp1p2/3PpP2/R3P1p1/4BnPp/3qBK2/4R3 b - - 2 35

[Assistant] Qxe1#


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

[User] FEN: 4r1k1/6p1/3Q4/5rp1/3B2q1/5p2/P6R/5K2 w - - 6 55

[Assistant] Rh8+


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

[User] FEN: r1b3k1/pp4pp/1b2pq2/3P4/8/1N1QP1P1/Pn4BP/R1B3K1 w - - 0 20

[Assistant] Qb5


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

[User] 1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. f4 exd4 5. Qxd4 Nc6 6. Qd1 Be7 7. Nf3 O-O 8. Be3 Bg4 9. Be2 Nb4 10. a3 Nc6 11. h3 Bxf3 12. Bxf3 Nd7 13. Qd2 Re8 14. O-O-O Bf8 15. g4 Nf6 16. g5 Nd7 17. h4 a5 18. h5 b5 19. g6 b4 20. Nd5 bxa3 21. bxa3 Nc5 22. Bxc5 dxc5 23. gxh7+ Kxh7 24. f5 Ne5 25. Qf4 f6 26. h6 g5

[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] 1. d3 d6 2. g3 c6 3. Bg2 Nd7 4. Nf3 g6 5. O-O Bg7 6. Bh6 Ngf6 7. Bxg7 Rg8 8. Bxf6 exf6 9. e3 Kf8 10. Nbd2 Kg7 11. c3 Re8 12. d4 Nf8 13. Qc2 a5 14. e4 a4 15. a3 b5 16. Rfe1 Ra7 17. Rad1 Rd7 18. Nf1 Rde7 19. Ne3 Qc7 20. Ng4 Bxg4 21. h3 Bxf3 22. Bxf3 h5 23. h4 c5 24. Qd3 c4 25. Qd2 Qc8 26. Qf4 Qc6 27. e5 dxe5 28. dxe5 fxe5 29. Qe3 Qf6 30. Rd5 Qf5 31. Rxb5 Qc2 32. Re2 Qd1+ 33. Kg2 Qd7 34. Rb4 e4 35. Bxh5 gxh5 36. Rxc4 Ng6 37. Qg5 Re5

[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. d4 e5 2. c3 Nc6 3. Nf3 e4 4. Nfd2 f5 5. Nb3 Nf6 6. Bg5 d5 7. e3 Be7 8. N1d2 Be6 9. Rc1 h6 10. Bxf6 Bxf6 11. c4 dxc4 12. Nxc4 Bxc4 13. Bxc4

[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 d6 2. e3 g6 3. Nf3 Bg7 4. Bd3 Nf6 5. h3 O-O 6. b3 Nc6 7. Nbd2 Re8 8. Bb2 e5 9. dxe5 dxe5 10. e4 Nd4 11. Nxd4 exd4 12. O-O c5 13. Re1 b6 14. a4 Bb7 15. a5 Nd7 16. axb6 axb6 17. f3 Rxa1 18. Qxa1 Qa8 19. Nc4 Bc6 20. Nd6 Rd8 21. Qxa8 Rxa8 22. Ra1 Rxa1+ 23. Bxa1 Nf8 24. Bb5 Bxb5 25. Nxb5 Nd7 26. Kf1 Be5 27. Ke2 f5 28. exf5 gxf5 29. c3 dxc3 30. Bxc3 Bxc3 31. Nxc3 Kf7 32. Kd3 Ke6 33. Kc4 Kd6 34. f4 Kc6 35. Nb5 Nf6 36. Na7+ Kd6 37. Nb5+ Kc6 38. b4 cxb4 39. Kxb4 Nd5+ 40. Kc4 Nxf4 41. Nd4+ Kb7 42. Nxf5 Nxg2 43. Nd4 Nf4 44. h4 Ng6 45. Nf5 Nf4 46. Kd4 Ka6

[Assistant] Ke4


[System] You are a chess 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. d3 Nf6 3. Nd2 c5 4. Ngf3 Nc6 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. c3 b6 9. Re1 Bb7 10. d4 e5 11. d5 Ne7 12. c4 Nd7 13. Nb1 h6 14. Nc3 f5 15. Be3 f4 16. gxf4 exf4 17. Bd2 Ne5 18. Nxe5 Bxe5 19. Bf3 h5 20. Kh1 Kh7 21. Rg1 Ng8 22. Bxh5 Rf6 23. Bg4 Qf8 24. Be6 Qh6 25. Qg4 Qh5 26. Qxh5+ gxh5 27. Rg5 Rg6 28. Rxh5+ Rh6 29. Rxh6+ Kxh6 30. Rg1 Ne7 31. Rg4 Bc8 32. Bxc8 Rxc8 33. Bxf4+ Bxf4 34. Rxf4 Kg6

[Assistant] Kg2


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Bc4 Qc7 9. Bb3 Bd7 10. Qd2 Nc6 11. O-O-O O-O-O 12. Bh4 Nxd4 13. Qxd4 Bc6 14. Rhe1 Rhe8 15. h3 Nd7 16. Bxe7 Rxe7 17. Qxg7 Nc5 18. e5 dxe5 19. Rxd8+ Qxd8 20. Qxe5 Nxb3+ 21. axb3 Qb6 22. g4 Bg2 23. h4 Bh3 24. g5 Bf5

[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: r3k2r/pbpnqpb1/1p1pp1p1/7p/2PPPN2/2NBP1Q1/PP4PP/R4RK1 w kq - 2 13

[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] FEN: r4k2/6Rp/8/1p6/pP4P1/2Bb3P/3RnP1K/8 b - - 4 32

[Assistant] Nxc3


[System] You are a chess 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/pbp3pQ/1p3b1p/3pq3/4P3/1P1B4/P1PN2PP/4R1K1 w - - 1 22

[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] FEN: r3k1nr/pp1n1ppp/3qp3/1B1p4/3P4/5N1P/PPP2PP1/R2QK2R b KQkq - 2 10

[Assistant] Qb4+


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

[User] FEN: r4b1k/6p1/7p/r3N2P/4qp2/P5P1/1B2nPQ1/R2R3K b - - 0 40

[Assistant] Rxe5


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

[User] FEN: 5q2/8/p2pR3/6k1/2P2pr1/1PP2QP1/5K2/8 b - - 1 39

[Assistant] fxg3+


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

[User] 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. e3 d6 5. b3 O-O 6. Bb2 Nbd7 7. Be2 Re8 8. O-O e5 9. dxe5 dxe5 10. Nxe5 Qe7 11. Nxd7 Bxd7 12. Nc3 Bc6 13. Bf3 Rad8 14. Qe2 Ne4 15. Nxe4 Bxe4 16. Bxg7 Bxf3 17. Qxf3 Kxg7 18. Rfd1 Qe5 19. Rxd8 Qxa1+ 20. Rd1 Qxa2 21. Qxb7 Qc2 22. Rf1 Re7 23. Qxa7 Qxb3 24. Qd4+ f6 25. h3 Qb4 26. Rd1 h5 27. c5 Qb5 28. Qd8 Rf7

[Assistant] Qd5


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

[User] 1. Nf3 c6 2. Nc3 d5 3. e4 Nf6 4. exd5 cxd5 5. d4 e6 6. Bd3 Nc6 7. Bg5 Be7 8. Ne2 Nd7 9. Bxe7 Qxe7 10. c3

[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 g6 3. Nc3 Bg7 4. e4 O-O 5. Nf3 d6 6. h3 Na6 7. Bg5 Qe8 8. g4 c5 9. d5 e6 10. Be2 exd5 11. exd5 h5 12. Qd2 hxg4 13. hxg4 Nxg4 14. Rh4

[Assistant] Bf5


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

[User] 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O e6 5. b3 Be7 6. Bb2 O-O 7. d3 c5 8. Nbd2 Nc6 9. e4 d5 10. Qe2 Qc7 11. Rae1 dxe4 12. dxe4 Rad8 13. c4 e5 14. Nh4 Nd4 15. Bxd4 cxd4 16. Nf5 Bb4 17. Rd1 Rfe8 18. Qf3 Bxd2 19. Rxd2

[Assistant] Bxe4


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

[User] 1. Nf3 e5 2. g3 e4 3. Ng1 d5 4. Bg2 Bh3 5. Nxh3 Nf6

[Assistant] d3


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

[User] 1. Nf3 g6 2. d4 Bg7 3. c4 d6 4. Nc3 Nf6 5. e4 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Nd3 f5 11. Bd2 c6 12. Rc1 a5 13. f3 Nf6 14. a3 b5 15. b3 bxc4 16. bxc4 Ba6 17. Qa4 cxd5 18. cxd5 Rc8 19. Nf2 Bxe2 20. Nxe2 Qb6 21. Qxa5 Qb2 22. Qb4 Qa2 23. Rxc8 Rxc8 24. Rc1 Rc5 25. Nc3 Qc4 26. Qxc4

[Assistant] Rxc4


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

[User] 1. c4 e5 2. Nf3 Nc6 3. e3 Bc5 4. d4 exd4 5. exd4 Be7 6. d5 Nb8 7. Nc3 d6 8. Be3 Nf6 9. Be2 O-O 10. Qc2 c6 11. O-O-O cxd5 12. cxd5 g6 13. Kb1 Bf5 14. Bd3 Bxd3 15. Qxd3 Na6 16. Bh6 Nc5 17. Qd4 Re8 18. g4 Rc8 19. g5 Nh5 20. Rhg1 Bf8 21. Rg4 Bxh6 22. gxh6 Qf6 23. Qxf6 Nxf6 24. Rc4 a6 25. b4 b5 26. Rcd4 Ncd7 27. Rc1

[Assistant] Ne5


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

[User] FEN: r1b2br1/pp2k3/5p1p/2pBp3/4P3/8/PPPP1qPP/RNBQ3K w - - 4 14

[Assistant] Bxg8


[System] You are a chess 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. c4 b6 4. Nc3 Bb7 5. Bg5 Bb4 6. e3 h6 7. Bh4 g5 8. Bg3 Ne4 9. Qc2 Bxc3+ 10. bxc3 d6 11. Bd3 f5 12. Bxe4 Bxe4 13. Qa4+ Qd7 14. Qxd7+ Nxd7 15. O-O O-O 16. Rfd1 a5 17. a3 Kg7 18. Nd2 Bc2 19. Rdc1 Bd3 20. f3 Kg6 21. Bf2 e5 22. e4 fxe4

[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Bc4 Nf6 5. Qe2 Nc6 6. Nf3

[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. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Nbd7 5. Qb3 c6 6. Bg5 Be7 7. e3 h6 8. Bxf6 Nxf6 9. O-O-O Ne4 10. Nxe4 dxe4 11. Ne5 O-O 12. h4 Qc7 13. f4 exf3 14. gxf3 Bf6 15. f4 Bxe5 16. fxe5 c5 17. Bg2 Rb8 18. Kb1 b5 19. cxb5 a6 20. Qc3 Rxb5 21. Rc1 Bd7 22. dxc5 Bc6 23. Rh2 Rfb8 24. Bxc6 Qxc6 25. Rd2 Qe4+ 26. Ka1

[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 c5 2. Nf3 e6 3. c3 Nf6 4. Bd3 d5 5. e5 Nfd7 6. O-O Nc6 7. Qe2 Qc7 8. Re1 g6 9. Bc2 Bg7 10. d4 O-O 11. a3 a5 12. Bg5 b6 13. Qe3 Re8 14. Bd3 Ba6 15. Nbd2 Bxd3 16. Qxd3 c4 17. Qe3 b5 18. Bh6 Bh8 19. h4 b4 20. h5 bxc3 21. bxc3 Rab8 22. g3 Rb2 23. Kg2 Reb8 24. Rh1 a4 25. Ng5 Ncxe5 26. dxe5 Qxe5 27. Qxe5 Nxe5

[Assistant] Rab1


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

[User] FEN: r4r2/pp3pk1/5Bq1/3B1b1Q/3b4/6P1/PP6/R4R1K b - - 2 26

[Assistant] Kxf6


[System] You are a chess 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/p1r5/1ppbknQ1/8/1P1Pr2P/P2NP3/5P2/1B5K b - - 1 34

[Assistant] Rxh4+


[System] You are a chess 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. Bc4 e6 7. Bb3 Nbd7 8. O-O Nc5 9. f4 Nfxe4 10. Nxe4 Nxe4 11. f5 e5 12. Qf3 d5 13. Ne2 Bc5+ 14. Be3 Bxe3+ 15. Qxe3 O-O 16. Rad1 Nf6 17. Qxe5 Re8 18. Bxd5

[Assistant] Rxe5


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

[User] FEN: 8/pppR2p1/4nkPp/4p2P/4P3/2P1K3/Pr3rP1/3R4 w - - 4 28

[Assistant] Rf7+


[System] You are a chess 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 g6 2. Nc3 Bg7 3. d4 d6 4. e4 Nc6 5. Nf3 Bg4 6. d5 Nd4 7. Be2 Nxe2

[Assistant] Qxe2


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

[User] 1. d4 g6 2. Nf3 Bg7 3. g3 b6 4. Bg2 Bb7 5. O-O Nf6 6. c4 O-O 7. Nc3 d5 8. Ne5 c6 9. cxd5 Nxd5 10. Nxd5 cxd5 11. Nd3 Nc6 12. Bf4 e6 13. e3 Re8 14. Qb3 Qd7 15. Nb4 Nxb4 16. Qxb4 Rac8 17. Rac1 Ba6 18. Rfe1 h5 19. Qd6 Qxd6 20. Bxd6 Bf8 21. Bxf8 Kxf8 22. f4 Ke7 23. Kf2 Kd6 24. Red1 Rxc1 25. Rxc1 Rc8 26. Rxc8 Bxc8 27. Ke1 Ba6 28. Kd2 f6 29. Kc3 e5 30. Bf3 Bb7 31. Be2 Bc6 32. dxe5+ fxe5 33. Bd3 Be8 34. Bc2 Bf7 35. b4 Be8 36. a3 Bf7 37. Bd3 Be8 38. Bb1 Bf7 39. Ba2 Be8 40. Bb1 Bf7 41. Bc2 Be8 42. h4 Bf7 43. Kd2 Be8 44. Bb3 Bf7 45. Bc2 Be8 46. Kd3 Bf7 47. Kc3 Be8 48. Bd3 Bf7 49. Be2

[Assistant] Be8


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

[User] 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. O-O a6 5. Bxd7+ Bxd7 6. d4 cxd4 7. Qxd4 e5 8. Qd3 b5 9. Rd1 h6 10. Nbd2 Nf6 11. Nf1 Bc6 12. Ng3 Qb6 13. c3 Qb7 14. Re1 Be7

[Assistant] Nh4


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

[User] FEN: 2kR1r2/4R2Q/p1p1bq2/1p3p1p/8/8/PPP3PP/1K6 b - - 0 25

[Assistant] Kxd8


[System] You are a chess 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 Nf6 2. d4 g6 3. f4

[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] FEN: 3r2k1/p1p2Rp1/bp1qpbQ1/3pP3/8/3P3P/PP2N3/2KR4 b - - 0 27

[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. e3 d6 2. d4 g6 3. c4

[Assistant] Bg7


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

[User] 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 g6 6. cxd5 Nxd5 7. Nf3 Bg7 8. Bc4 Nb6 9. Bb3 O-O 10. O-O Nc6 11. d5 Na5 12. Bg5 Nxb3 13. Qxb3 h6 14. Bh4 Bf5 15. Rad1 g5 16. Bg3 Rc8 17. d6 Re8 18. Nd4 Bxd4 19. Rxd4

[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: 8/8/P4p2/5P1p/1k5P/3p4/3K2b1/6B1 w - - 1 57

[Assistant] Bd4


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

[User] 1. Nf3 d6 2. g3 Nf6 3. Bg2 e6 4. O-O Be7 5. d4 O-O 6. c4 Nbd7 7. Nc3 Rb8 8. e4 b6 9. e5 dxe5 10. dxe5 Ne8 11. Qc2 Bb7 12. Rd1 Qc8 13. Bg5 Bxg5 14. Nxg5

[Assistant] g6


[System] You are a chess 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 Nf6 2. f4 d5 3. Nf3 Nc6 4. Be2 Bg4 5. O-O Bxf3 6. Bxf3 e6 7. b3 Bc5 8. Bb2 d4 9. Bxc6+ bxc6 10. Qf3 Qd6 11. e4 e5 12. d3 exf4 13. Qxf4 Qxf4 14. Rxf4 Bd6 15. Rf3 c5

[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. b3 e6 2. Bb2 Nf6 3. g3 Be7 4. Bg2 d5 5. Nf3 O-O 6. O-O Ne4 7. d3 Nd6 8. c4 f5 9. cxd5 exd5 10. Ne5 c6 11. e4 fxe4 12. dxe4 Nxe4 13. Bxe4 dxe4 14. Qxd8 Bxd8 15. Re1 Nd7 16. Nxd7 Bxd7 17. Rxe4 Bf6 18. Bxf6 Rxf6 19. Nc3 Raf8 20. f4 Bh3 21. Rae1 g5 22. Ne2

[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 g6 2. c4 Bg7 3. Nf3 d6 4. Nc3 Nf6 5. g3 O-O 6. Bg2 Nbd7 7. O-O e5 8. h3 Re8

[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] FEN: 4r3/2n1rpkp/p2p2p1/2pP4/1pP5/1P1QNq2/P4P2/1R3KR1 w - - 0 30

[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: 8/8/6pp/2k5/2p2PPP/p1P5/2K5/8 b - - 0 42

[Assistant] Kd5


[System] You are a chess 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. e3 d5 3. f4 Nf6 4. Nf3 Bg4 5. Bd3 e6 6. Nbd2 Nbd7 7. c3 Bd6 8. O-O c5 9. Qe1 O-O 10. Ne5 Bf5 11. Bxf5 exf5 12. Qg3 Ne4 13. Nxe4 fxe4 14. Qh3 Nxe5 15. fxe5 Bc7 16. Bd2 Qe7 17. Be1 Qe6 18. Qg3 f6 19. Qh4 fxe5 20. Bg3 Bd6 21. Qg5 exd4 22. cxd4 Bxg3 23. Qxg3 cxd4 24. exd4 Rxf1+ 25. Rxf1 h6 26. Qc7 Qb6 27. Qf7+ Kh8 28. Qxd5 Rd8 29. Qxe4 Qxd4+ 30. Qxd4 Rxd4 31. Rf8+ Kh7 32. Rf2 Rb4 33. a3

[Assistant] Rb3


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

[User] 1. c4 e6 2. g3 d5 3. Bg2 c6 4. Nf3 dxc4 5. O-O Nd7 6. a4

[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] FEN: 8/5p1k/1BQ1nq2/P3p3/4P1P1/2P3P1/1P4K1/8 b - - 4 44

[Assistant] Nf4+


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 a6 5. h3 Nc6 6. Qe3 Nf6 7. c4 g6 8. Nc3 Bg7 9. Be2 O-O 10. O-O e6 11. Rb1 Qe7 12. b3 Rd8 13. Bb2 b6 14. Rfd1 Bb7 15. Rbc1 Rd7 16. Qd2 Rad8 17. Qe1 d5 18. exd5 exd5 19. cxd5 Nxd5 20. Nxd5

[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] 1. f4 b6 2. g3 Bb7 3. Nf3 Bxf3 4. exf3 d5 5. Bh3 e6 6. Qe2 Bd6 7. f5 e5 8. d4 Qe7

[Assistant] Nc3


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

[User] FEN: 5rk1/3n1ppp/Qp1Np2q/3b4/3NB2n/4P3/PP3PPP/2R3K1 b - - 2 21

[Assistant] Nc5


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

[User] 1. e4 g6 2. Nc3 Bh6 3. g3 d6 4. Nf3 e5 5. Bg2 Nc6 6. d3 f5 7. O-O f4 8. Nd5 g5 9. c3 g4 10. Nh4 f3 11. Bh1 Be6 12. h3 Bg5 13. hxg4 Bxh4

[Assistant] gxh4


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

[User] FEN: 8/5p1k/7p/6p1/8/p1Pq3P/P3K1P1/8 w - - 0 52

[Assistant] Kxd3


[System] You are a chess 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 d4 3. b3 c5 4. g3 Nc6 5. Bg2 e5 6. d3 g6 7. O-O Bg7 8. e3 Nge7 9. exd4 exd4 10. Re1 O-O 11. Na3 a6 12. Nc2 Qb6 13. Ba3 a5 14. Nfxd4 Nxd4 15. Nxd4

[Assistant] Bxd4


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

[User] 1. d4 d6 2. Nf3 c6 3. Bg5 Nd7 4. Bh4 Qb6 5. b3 a5 6. c3 a4 7. Nbd2 h6 8. b4 g5 9. Bg3 Bg7 10. e3 Ngf6 11. Nc4 Qa7 12. Be2 b5 13. Ncd2 Nh5 14. O-O Nxg3 15. fxg3 Nf6 16. e4 e5 17. Nb1 Nxe4 18. Qd3 Nf6 19. Kh1 e4

[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: q3k2r/4b2p/4Qnp1/3pn3/2pP1P2/2P1P3/6PP/2B2RK1 w k - 0 22

[Assistant] fxe5


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

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Nf3 d6 6. h3 Nc6 7. Be3 e5 8. d5 Ne7 9. g4 Ne8 10. Be2 f5 11. gxf5 gxf5 12. Bg5 Nf6 13. Nd2 Qe8 14. Qc2 a6 15. Rg1 Kh8 16. O-O-O f4 17. Bxf6 Bxf6 18. Bg4 Bh4 19. Nf3 Ng6 20. Bxc8 Qxc8 21. Rg4 Bf6 22. Rdg1 b5 23. h4 bxc4 24. h5 Ne7 25. Nd2 c6 26. Nxc4 Qb8 27. dxc6 Nxc6 28. Nd5

[Assistant] Nd4


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

[User] 1. d4 Nf6 2. Nf3 e6 3. g3 Be7 4. Bg2 O-O 5. O-O d5 6. c4 c5 7. cxd5 cxd4 8. dxe6 Bxe6 9. Nxd4 Bd7 10. Bxb7 Nc6 11. Nxc6 Bxc6 12. Qxd8 Rfxd8 13. Bxc6 Rac8 14. Bf3 Nd5 15. Nc3 Nxc3 16. bxc3 Rxc3 17. Be3 Bf6 18. Rac1 Ra3 19. Rc7 Rxa2 20. Rxa7 Rxa7

[Assistant] Bxa7


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

[User] 1. e4 c6 2. Nf3 d5 3. exd5 cxd5 4. d4 Nf6 5. Bd3 a6 6. c3 Nc6 7. Bg5 e6 8. a4 Be7 9. O-O b6 10. Nbd2 Bb7 11. Qe2 O-O 12. Rae1 h6 13. Bh4 a5 14. Nb1 Nd7 15. Bg3 Bf6 16. Na3 Ne7 17. Nb5 Rc8 18. Nd6 Rb8 19. Nb5 Rc8 20. Na7 Ra8 21. Nb5 Bc6 22. Ne5 Bxb5 23. Bxb5 Bxe5 24. dxe5 Rc8 25. f4 Nf5 26. Bf2 Nc5 27. b4 axb4 28. cxb4 Ne4 29. Bd3 Nc3 30. Qc2 Ne4 31. Qb2 Nxf2 32. Rxf2 g6 33. Bxf5 gxf5 34. Rc2 Kh7 35. Rec1 Rxc2 36. Qxc2 Qh4 37. g3 Qg4 38. Qc7 Kg7 39. Qe7 Qf3 40. Qf6+ Kg8 41. Qxh6 Qe3+ 42. Kg2 Qxc1 43. Qg5+

[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. c4 g6 2. g3 Bg7 3. Bg2 Nf6 4. Bxb7 Bxb7 5. Nf3 d5 6. cxd5 Bxd5 7. Nc3 Bxf3

[Assistant] exf3


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

[User] 1. g3 d5 2. Bg2 c6 3. c4 e6 4. cxd5 exd5 5. Nf3 Nf6

[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. c4 e6 2. Nc3 Nf6 3. d4 Be7 4. Nf3 O-O 5. g3 d5 6. cxd5 exd5 7. Bg2 c6 8. O-O Bf5 9. Bf4 Bg6 10. Ne5 Nbd7 11. Nxg6 fxg6 12. Rfe1 Kh8 13. e4 dxe4 14. Nxe4 Nxe4 15. Bxe4 Bf6 16. Qb3 Nb6 17. Rad1 Bxd4 18. Be3 c5 19. Bxb7 Rab8 20. Bg2 Qf6 21. Bxd4 cxd4 22. Qd3 Qxf2+ 23. Kh1 Rbd8 24. Ref1 Qxb2 25. Rxf8+ Rxf8 26. Qxd4 Qxa2 27. Qd6 Re8 28. h4 Qf7 29. Rf1 Qg8 30. Bc6 Rd8 31. Qc7 Nd5 32. Qxa7 Ne3 33. Qxe3 h6 34. Qf3 Rc8 35. Be4 g5 36. Qf5 gxh4

[Assistant] gxh4


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

[User] 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5 Nxe5 5. d4 Nc6 6. d5 Nb8 7. e5 Ng8 8. d6 c6 9. Bc4 Qh4 10. Qe2 g6 11. Ne4 Bg7 12. Bg5 Qh5 13. Qe3 h6 14. Qf4 f5

[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. e4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nge2 Nge7 6. h3 O-O 7. O-O d6 8. Kh2 h6 9. f4 a6 10. d3 b5 11. Nd5 Nxd5 12. exd5 Ne7 13. d4 exf4 14. Nxf4 Kh7 15. Qd3 Ng8 16. 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. e3 e5 2. d3 d5 3. Nd2 Nf6 4. Ne2 Bd6 5. g3 O-O 6. Bg2 Re8 7. h3 c6 8. O-O Nbd7 9. b3 a5 10. Bb2 a4 11. a3 axb3 12. cxb3 Nc5 13. b4 Nxd3 14. Qc2 Nxb2 15. Qxb2 Qe7 16. Nb3 Bf5 17. Kh2 h6 18. Rfd1 Rad8 19. Nc5 Nd7 20. Nxb7 Rc8 21. Nxd6 Qxd6 22. Rac1 Be6 23. e4 d4 24. a4 c5 25. bxc5 Nxc5 26. f4 f6 27. a5 Rb8 28. Qa3 Nxe4 29. Qxd6 Nxd6 30. fxe5 fxe5 31. Nxd4 exd4 32. Rxd4 Nf5 33. Ra4 Bd7 34. Ra2 Ra8 35. Bxa8 Rxa8 36. a6 Ne3 37. a7 Bf5 38. Rc7 Nd5 39. Rb7 Be4 40. Rb8+ Kf7 41. Rxa8

[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. Nf3 g6 2. d3 Bg7 3. g3 c5 4. Bg2 Nc6 5. O-O e5 6. c4 Nge7 7. Nc3 O-O 8. Rb1 d6 9. Ne1 Be6 10. Bg5 f6 11. Be3 b6 12. Nc2

[Assistant] d5


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

[User] 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Qxd4 e6 6. Nf3 Nc6 7. Qe4 f5 8. Qe2 b5 9. g3 Be7 10. Bg2 O-O 11. O-O Rb8 12. Rd1 Qc7 13. Nbd2 b4 14. c4 Ba6

[Assistant] Qe1


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

[User] 1. d4 Nf6 2. e3 e6 3. f4 d5 4. Nf3 c5 5. c3 Nc6 6. Bd3 h6 7. O-O Bd6 8. Ne5 Bd7 9. Bc2 Qe7 10. Nd2 O-O-O 11. Ndf3 Kb8 12. b4 cxb4 13. Nxc6+ Bxc6 14. cxb4 Bxb4 15. Ne5 Rc8 16. a3

[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: r4rk1/2p3p1/pbppb2p/5P2/PP6/2PP2Pq/1B2BP1P/R2Q1RK1 b - - 0 17

[Assistant] Bd5


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

[User] 1. d4 c5 2. d5 f5 3. c4 g6 4. Nc3 Nf6 5. f3 Qa5 6. e4 fxe4 7. Bd2 Bg7 8. fxe4 d6 9. Nf3 Bg4 10. Be2 Bxf3 11. gxf3 Nbd7 12. f4 O-O 13. Qc2 a6 14. O-O Qc7 15. a4 b6 16. Bf3 Rae8 17. Rae1 e5 18. dxe6 Rxe6 19. Nd5 Qd8 20. Bc3 Nxd5 21. cxd5 Bxc3 22. dxe6 Bxe1 23. exd7 Bh4 24. Bg4 Qe7 25. Qc4+ Kh8 26. Kg2 Bf6 27. Rd1

[Assistant] h5


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

[User] 1. e4 d5 2. Nf3 dxe4 3. Ng5 Nf6 4. d3 e6 5. Nxe4 Nxe4 6. dxe4 Qxd1+ 7. Kxd1 c5 8. c3 Nc6 9. Kc2 Be7 10. Be3 O-O 11. Be2 b6 12. f3 Ba6 13. a4 Bxe2 14. Na3 Ba6 15. Nb5 Bxb5 16. axb5 Nb8 17. Rhd1 Nd7 18. Rxd7 Rfe8 19. Rdxa7 Bf6 20. Rxa8 Bd8 21. R1a7 f6 22. Rc8 Kf8 23. Raa8 Ke7 24. Rxd8 Rxd8 25. Rxd8 Kxd8 26. Kb3 Kc7 27. Kc4 e5 28. Bxc5 bxc5 29. Kxc5 Kb7 30. c4 g6 31. b4 g5 32. Kd5 h5 33. Ke6 g4 34. Kf5 gxf3 35. gxf3 Kb6 36. Kxf6 h4 37. Kxe5 h3 38. Kf5 Kc7 39. Kg4 Kd6 40. Kxh3 Ke5 41. Kg4 Kd4 42. h4 Kxc4 43. h5 Kxb5 44. h6 Kxb4 45. f4 Kc3 46. Kg5 Kd3 47. f5 Kxe4 48. f6 Ke5 49. Kg6 Ke6 50. Kg7 Kd5 51. f7 Kd4

[Assistant] f8=Q


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

[User] 1. d4 e6 2. Nf3 d5 3. Nc3 c5 4. e4 cxd4

[Assistant] Nxd4


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

[User] FEN: r1bq1rk1/p4pb1/1pn2n1p/3NB1p1/3Q4/5N2/PP2BPPP/3R1RK1 w - - 1 17

[Assistant] Nxf6+


[System] You are a chess 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 g6 3. e3 Bg7 4. Nf3 O-O 5. h3 d6 6. Be2 c5 7. O-O Qb6 8. b3 cxd4 9. exd4 Nc6 10. c3 Re8 11. Nbd2 Nd5 12. Nc4 Qc7 13. Bd2 Nb6 14. Ne3 e5 15. d5 Ne7 16. c4 e4 17. Ng5 Nf5 18. Nxf5 Bxf5 19. h4 h6 20. Nh3 Bxh3 21. gxh3 Nd7 22. Rc1 Ne5 23. Kg2 Qd7 24. f4 exf3+ 25. Bxf3 Nd3 26. Rc2 Ne5 27. Bc3 Re7 28. Be4 Rae8 29. Rcf2 f5 30. Bc2 Nf7 31. Bxg7 Kxg7 32. Qd4+ Re5 33. h5 Ng5 34. Kh1 f4 35. Kg2 Qxh3+

[Assistant] Kg1


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

[User] 1. e4 e5 2. Bc4 Nf6 3. Nc3 Nxe4 4. Qh5 Nd6 5. Bb3 Nc6 6. Nb5 g6 7. Qf3 f5 8. Qd5 Qe7 9. Nxc7+ Kd8 10. Nxa8 b6 11. d3 Bb7 12. h4 f4 13. Qf3 Nd4 14. Qh3 Bxa8 15. Bd2 Bg7 16. O-O-O Rf8 17. h5 g5 18. h6 Bh8 19. Nf3 Nxb3+ 20. axb3 e4 21. dxe4 Nxe4 22. Bb4 d6 23. Rhe1 Qf6 24. Rd4 Nxf2 25. Qh5 Bxf3

[Assistant] Qxf3


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

[User] 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. Bf4 O-O 6. Rc1 c5 7. dxc5 Qa5 8. cxd5 Ne4 9. Be5 Bxe5 10. Nxe5 Nxc3 11. Rxc3 Qxa2 12. Nc4 Na6 13. e4 Nb4 14. Ra3 e6 15. Rxa2 Nxa2 16. d6 Bd7 17. Be2

[Assistant] Nb4


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

[User] FEN: 5k2/p4p2/5p2/4p3/5q2/8/PP4Qp/3R2bK w - - 2 31

[Assistant] Rd8+


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

[User] 1. g3 h5 2. Bg2 h4 3. gxh4 e5 4. d3 d5 5. Nf3 Nc6 6. Nc3 Nf6 7. e4 d4 8. Ne2 Bg4 9. Ng3 Qd7 10. h3 O-O-O 11. hxg4 Nxg4 12. Bh3 f6

[Assistant] Ng5


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

[User] 1. d4 d5 2. Nf3 c6 3. Bf4 Nf6 4. e3 Bg4 5. c3 e6 6. Nbd2 Nbd7 7. Bd3 Be7 8. h3 Bh5 9. Qc2 Bg6 10. Ne5 Nxe5 11. Bxe5 Rc8 12. g4 Qb6 13. O-O-O c5 14. f4 cxd4 15. exd4 Bxd3 16. Qxd3 O-O 17. Rdg1 Nd7 18. f5 Nxe5 19. dxe5 d4 20. c4 Bb4 21. b3 Qa5 22. Qc2 d3 23. Qxd3 Rfd8 24. Qe4 Rxd2 25. fxe6 Qxa2

[Assistant] exf7+


[System] You are a chess 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. d3 d6 5. c3 O-O 6. Nbd2 Nc6 7. e4 e5 8. O-O Bg4 9. Qb3 Qc8 10. Nc4 h6 11. Ne3 Rb8 12. Nh4 Kh7 13. Nxg4 Nxg4 14. Bh3 f5 15. exf5 gxf5 16. Nxf5 Qxf5 17. f3 e4 18. Bxg4 Qc5+ 19. d4 Bxd4+ 20. cxd4 Nxd4 21. Qe3 Nxf3+ 22. Bxf3 Rxf3 23. Rxf3 exf3 24. Qxc5

[Assistant] dxc5


[System] You are a chess 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/pp1p1p2/4pq2/7p/4P1P1/1N1Bb1BP/PPP5/RN2Q2K b kq - 0 19

[Assistant] Qf3+


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

[User] 1. d4 d5 2. Nc3 Nf6 3. e3 e6 4. Bd3 Be7 5. Nge2 c5 6. dxc5 Bxc5 7. Bd2 Be7 8. O-O Nc6 9. Ng3 b6 10. e4 dxe4 11. Ncxe4 Nxe4 12. Nxe4 Bb7 13. Qg4 O-O 14. Ng5 Bxg5 15. Bxg5 f6 16. Qxe6+ Kh8 17. Qh3 g6 18. Bxg6 Qe7 19. Be3 Qg7 20. Bd3 Ne5 21. Bh6 Bc8 22. Bxg7+ Kxg7 23. Qg3+ Ng6

[Assistant] Bxg6


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

[User] 1. e4 d6 2. Nf3 Nf6 3. Nc3 g6 4. Bc4 Bg7 5. d4 O-O 6. Bf4 Bg4 7. h3 Bxf3 8. Qxf3 Nc6 9. O-O-O Qe8 10. Rhe1 e5 11. dxe5 Nxe5 12. Bxe5 Qxe5 13. g4 a6 14. g5 Qxg5+ 15. Kb1 b5 16. Bd5 Nxd5 17. Nxd5 Qe5 18. c3 b4 19. Nxc7 bxc3 20. Qxc3 Qxc3 21. bxc3 Rab8+ 22. Kc2 Rfc8 23. Nd5 Rb5 24. Ne7+

[Assistant] Kh8


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

[User] FEN: 1br1r1k1/ppqb1pp1/2p4p/3p4/2PP4/5P1P/PPQn1P2/1B1RRNK1 w - - 0 21

[Assistant] Qh7+


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

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Bd3 Nf6 7. O-O b5 8. a3 Bb7 9. h3 Nc6 10. Be3 Rc8 11. Qe2 Be7 12. f4 d6 13. Rad1 O-O 14. Nf3 Na5 15. e5 Nd7 16. exd6 Bxf3 17. Qxf3 Bxd6 18. Ne4 Be7 19. Qh5 g6 20. Qh6

[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: 1r5r/pQ3ppp/3k2b1/q2pn3/P2p1P2/8/1P4PP/2RK1B1R w - - 1 21

[Assistant] fxe5+


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

[User] FEN: 4r3/8/1R6/P1k5/1p1p1P1P/5K2/6P1/8 b - - 1 36

[Assistant] d3


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e5 7. Nde2 h5 8. Bg5 Be6 9. Ng3 Nbd7 10. Be2 h4 11. Nh5 g6 12. Nxf6+ Nxf6 13. O-O Be7

[Assistant] a4


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

[User] FEN: 6k1/6p1/P6p/1P2K3/2p2P2/2PqN1Q1/7P/r7 w - - 7 50

[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] 1. e4 Nf6 2. d3 d5 3. Nc3 dxe4 4. dxe4 Qxd1+ 5. Kxd1 Nc6 6. f3 e5 7. Bd3 Be6 8. Be3 O-O-O 9. Ke2 Bb4 10. Kf2 Ba5 11. Nge2 Bb6 12. Na4 Bxe3+ 13. Kxe3 Rhe8 14. Nc5 b6 15. Nxe6 Rxe6 16. Ba6+ Kb8 17. Bc4 Red6 18. Bxf7 Nd4 19. Nxd4 exd4+ 20. Ke2 R6d7 21. Bb3 Re7 22. Rad1 c5 23. Bc4 Kb7 24. Kf2 a6 25. a4 Nd7 26. Rhe1 Rf8 27. g3 Ne5 28. Be2 Ng4+ 29. Kg1 Ne3 30. Rd2 g5 31. c3 Rd8 32. Kf2 h5 33. b4 a5 34. bxc5 bxc5 35. Rb1+ Kc7 36. Rb5

[Assistant] Kc6


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

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 d6 4. e4 Bg7 5. Nf3 O-O 6. Be2 Bg4 7. O-O Nbd7 8. d5 e5 9. Be3 h6 10. b4 Kh7 11. c5 a6 12. Nd2 Bxe2 13. Qxe2 Ng8 14. Nc4 Qe7 15. cxd6 cxd6 16. a4 f5 17. f3 f4 18. Bf2 g5 19. a5 Rac8 20. Na4 Rc7 21. Nab6 h5 22. Rac1 Ngf6 23. Nxd7 Nxd7 24. Nb6 Nxb6 25. Bxb6 Rcc8 26. Rc2 Rxc2 27. Qxc2 g4 28. Qc7 Rf7 29. Rc1

[Assistant] gxf3


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

[User] 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 b5 6. a4 bxa4 7. Nc3 Be7 8. d6 Bf8 9. e4 Bb7 10. e5 Ne4 11. Bc4 Nxc3 12. bxc3 h6 13. O-O g6 14. Rb1 Bc6 15. Be3 Bg7 16. Bxc5 O-O 17. Re1 Re8 18. Qd4 Bxf3 19. gxf3 Nc6 20. Qd5 Nxe5 21. Ba2 Qg5+ 22. Kh1 Rac8 23. Be3 Qh5 24. Bf4 Re6 25. Rb5 Rce8 26. Re3 Kh7 27. Bg3 Qh3 28. Kg1 Nxf3+ 29. Qxf3 Rxe3 30. fxe3 f5 31. Bc4

[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 Nc6 3. Bb5 Na5 4. d4 a6 5. Bd3 cxd4 6. Nxd4 e6 7. O-O Nf6 8. c4 Qc7 9. Qe2 Bc5 10. Be3 h5 11. h3 b6 12. Nd2 Bb7 13. a3 Nc6 14. Nxc6 Bxc6 15. b4 Bxe3 16. Qxe3 d6 17. Rac1 Ke7 18. Nf3 Qb7 19. Rfe1 Nd7 20. Qg5+ Kf8 21. Bb1

[Assistant] Rh6


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

[User] FEN: r5k1/4brp1/8/1p1pPp1R/pq3P2/3B2QP/2P3PK/8 w - - 0 34

[Assistant] c3


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

[User] FEN: 3b4/B1p5/2Pp2Q1/3PpPq1/4K1pk/8/8/8 w - - 4 51

[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] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 Be7 8. Bg5 O-O 9. Qf3 Nbd7 10. O-O-O Ne5 11. Qg3 Qc7 12. f4 Ng6 13. h4 h6 14. h5

[Assistant] Nxf4


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

[User] FEN: r2q1r1k/pppb2p1/2np3p/6nN/2BP3N/8/PP3PPP/R2QR1K1 b - - 1 17

[Assistant] Nh3+


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

[User] FEN: 4r2k/2p4p/1b1R1qpB/1Q3pN1/7P/2P5/5PP1/6K1 b - - 0 37

[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 g6 2. g3 Bg7 3. Bg2 d5 4. O-O Nf6 5. d3 O-O 6. Nbd2 c5 7. e4 Nc6 8. e5 Ng4 9. e6 Bxe6 10. Nb3 b6 11. Ng5 Qc8 12. Nxe6 Qxe6 13. Bh3 h5 14. f3 Ne3 15. Bxe6 Nxd1 16. Bd7 Ne5 17. Ba4 a6 18. Nd2 Ne3 19. Re1 d4 20. Bb3 e6 21. Ne4 Nxf3+ 22. Kf2 Nxe1 23. Kxe1 a5 24. a4 Nd5 25. Bd2 Rae8 26. Nd6 Re7 27. Nc4 Rb8 28. Kf1

[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 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 6. N1c3 a6 7. Na3 Be7 8. Nd5 Nf6 9. Bd3 O-O 10. c4 Be6 11. O-O Rc8 12. b3 h6 13. Nc2 Nd7 14. Bb2 Bg5 15. f4 exf4 16. Nxf4 Bxf4 17. Rxf4 Nde5 18. Be2

[Assistant] Qg5


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

[User] 1. f4 d6 2. Nf3 e5 3. e4 exf4 4. Nc3 g5 5. h4 g4 6. Nd4 Bh6 7. d3 c5 8. Nf5 Bxf5 9. exf5 Nf6

[Assistant] Be2


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

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. f3 d6 5. e4 O-O 6. Be2 e5 7. Be3 Nc6 8. d5 Nd4 9. Bxd4 exd4 10. Qxd4 Ng4

[Assistant] Qd3


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

[User] 1. e3 c5 2. b3 d5 3. Bb2 Nf6 4. f4 e6 5. Nf3 Be7 6. Bb5+ Bd7 7. Bxd7+ Nbxd7 8. O-O O-O 9. f5 Rc8 10. fxe6 fxe6 11. Ng5 Qb6 12. Qf3 h6 13. Nh3 Bd6 14. Nf4 Be5 15. Nc3 Ne4 16. Rad1 Nxc3 17. Bxc3 Bxc3

[Assistant] dxc3


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

[User] FEN: 8/6K1/1k5p/8/5nPP/8/8/8 w - - 1 55

[Assistant] Kxh6


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

[User] 1. e4 d5 2. e5 c5 3. c3 Nc6 4. f4 f6 5. Nf3 fxe5 6. fxe5 g6 7. d4 Bg7 8. Bb5 e6 9. O-O c4 10. Bg5 Ne7 11. Bxc6+ bxc6 12. Bf6 O-O 13. Bxg7 Kxg7 14. Nbd2 Nf5 15. Qe2 Rb8 16. Qe1 Rxb2 17. g4 Ne7 18. Qh4 Ng8 19. g5 c5 20. Rf2 Rb7 21. Raf1 Rbf7 22. dxc5 Rf4 23. Qg3 Qe7 24. Nd4 Rxf2 25. Rxf2

[Assistant] Rxf2


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

[User] 1. e4 c6 2. Nf3 d5 3. Nc3 Bg4 4. h3 Bh5 5. g4 Bg6 6. Qe2 d4 7. Nd1 c5 8. Ne5 Nc6 9. Nxc6 bxc6 10. f4 f6 11. f5 Bf7 12. e5 fxe5 13. Bg2 Bd5 14. O-O Qd6

[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. g4 h5 2. gxh5 a6 3. d4 Rxh5 4. e4 Rh8 5. Bg2 b5 6. Nc3 Bb7 7. d5 c6 8. Nge2 Nf6 9. Bg5 b4 10. Na4 Qa5 11. b3 cxd5 12. Bxf6 gxf6 13. exd5 f5 14. Qd4 Rg8 15. O-O-O Rxg2 16. Nf4 Rg4 17. d6 e5 18. Rhe1 Nc6 19. Qe3 Bh6 20. Nc5 O-O-O 21. Kb1 Bxf4 22. Qf3 Qxc5 23. Rd5 Qc3 24. Qxc3 bxc3 25. Red1 Nd4 26. Rc5+ Bc6 27. Rxc3

[Assistant] Rg2


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

[User] FEN: 8/6pk/P3p3/4B3/2p2P1p/2PqnQ1P/6PK/8 b - - 0 40

[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. d4 Nf6 2. e3 g6 3. Nf3 Bg7 4. b3 O-O 5. Bb2 c5 6. Nbd2 cxd4 7. exd4 d5 8. Be2 Nc6 9. O-O Bg4 10. Re1 e6 11. Ne5 Nxe5 12. dxe5 Bxe2 13. Qxe2 Nd7 14. f4 Rc8 15. Nf3 Qc7 16. Rac1 Qb8 17. c4 dxc4 18. Rxc4 Nb6 19. Rxc8 Rxc8 20. Ba3 Rc6 21. Bd6 Qc8 22. Nd4 Rc3 23. Nb5 Rc2 24. Qf1 a6 25. Nd4 Rxa2 26. Rc1 Qd8 27. Nf3 Bf8 28. Bc7 Qd5 29. Bxb6 Qxb3 30. Bc5 Bxc5+ 31. Rxc5 Qb6 32. Qc4 Ra5 33. Nd4 Qxc5 34. Qd3 Ra1+ 35. Kf2 Ra4 36. Ke3 Rxd4 37. Qxd4 Qxd4+ 38. Kxd4 Kg7 39. Kc5 f6 40. Kb6 fxe5 41. fxe5 g5 42. Kc5 Kg6 43. g4 h5 44. h3 hxg4 45. hxg4 Kf7 46. Kb6 Ke7 47. Kxb7 a5 48. Kc6 a4 49. Kc5 a3 50. Kc6 a2 51. Kc7 a1=Q 52. Kc6 Qxe5 53. Kb7 Qf4 54. Ka8 Qxg4 55. Kb7 Qf4 56. Ka8 g4 57. Ka7 g3 58. Ka8 g2 59. Kb7 g1=Q

[Assistant] Ka8


[System] You are a chess 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. e3 cxd4 4. exd4 d5 5. b3 Nc6 6. Bb2 Bg4 7. Nbd2 Bxf3 8. Nxf3 e6 9. Bd3 Bb4+ 10. c3 Bd6 11. O-O O-O 12. c4

[Assistant] Ne7


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

[User] 1. d4 c5 2. Nf3 cxd4 3. c3 d3 4. exd3 Nf6 5. d4 g6 6. Bg5 Bg7 7. Bc4 Ne4 8. Bf4 d5 9. Bd3 O-O 10. Nbd2 f5 11. Bxe4 fxe4 12. Bxb8 exf3 13. Bg3 fxg2 14. Rg1 Bh3 15. Qe2 Qa5 16. a3 e5 17. dxe5 Rae8 18. O-O-O Qa4 19. f4 d4 20. Qc4+ Qxc4 21. Nxc4 dxc3 22. bxc3 g5 23. Nd6 Rb8 24. f5 Rfd8 25. f6 Bf8 26. Kd2 Bg4 27. Rb1

[Assistant] Bf3


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

[User] FEN: 2b1k3/5pp1/p3p3/2K5/1r4P1/2NBQqP1/PPP4r/1R2R3 b - - 4 25

[Assistant] Qb7


[System] You are a chess 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 Nf6 3. Ngf3 e6 4. g3 c5 5. Bg2 d4 6. O-O Nc6 7. c3 Nd5 8. c4 Nf6 9. Qc2 Be7 10. a3 a5 11. Rb1

[Assistant] a4


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

[User] FEN: 2r5/p2n2p1/2q3k1/1p1p2B1/3p1QP1/P7/1PPK1P2/7R w - - 3 30

[Assistant] Qf5#


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

[User] 1. e4 e6 2. d4 d5 3. exd5 exd5 4. c4 Nc6 5. Nf3 dxc4 6. d5 Nf6 7. dxc6 Qxd1+ 8. Kxd1 bxc6 9. Bxc4 Bg4 10. Re1+ Be7 11. Bf4 O-O-O+ 12. Kc1 Bb4 13. Nc3 Rhe8 14. Ne5 Be6 15. Bxe6+ Rxe6 16. f3 Nd5 17. Nxd5 Bxe1

[Assistant] Nc3


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

[User] 1. e4 d6 2. d4 Nd7 3. Nd2 Ngf6 4. c3 e5 5. Bd3 g6 6. Ne2 Bg7

[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 c5 2. Nc3 d6 3. g3 Nc6 4. Bg2 g6 5. d3 Bg7 6. Be3 e6 7. Qd2 Rb8 8. Nge2 b5 9. Nd1 b4 10. c3 bxc3 11. bxc3 Qc7 12. O-O Ba6 13. Rc1 Nge7 14. Bh6 Bxh6 15. Qxh6 Bxd3 16. Re1 Bxe2 17. Rxe2 Kd7 18. Ne3 Ne5 19. f4 N5c6 20. Rd1 Kc8 21. Red2 Rd8 22. Qxh7 Ng8 23. e5 d5 24. Bxd5 exd5 25. Nxd5 Qa5 26. Qxf7 c4

[Assistant] Kg2


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

[User] 1. e4 c5 2. d3 e6 3. Nf3 Be7 4. Be2 d5 5. Be3 dxe4 6. dxe4 Nd7 7. Nc3 Ngf6 8. O-O O-O 9. e5 Ne8 10. Ne4 b6 11. Nd6 Nxd6 12. exd6 Bf6 13. Bf4 Bb7

[Assistant] c3


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

[User] FEN: 8/8/p7/8/7K/2k3QP/8/4q3 b - - 2 60

[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] FEN: 1Q6/p4rbk/2R3p1/1P5p/3PpP1q/4P3/P3K2P/6R1 b - - 8 38

[Assistant] Qxh2+


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

[User] FEN: r1b3k1/p5pp/2p1Nr2/2p5/2Pp2Q1/3P4/Pq3PPP/R3R1K1 w - - 0 19

[Assistant] Qxg7#


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

[User] 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 8. d5 Na5 9. Qa4 c5 10. dxc6 Nxc6 11. Bg5 Bd7 12. Qd1 Be6 13. b3 Nd7 14. Rc1 h6 15. Bf4 Re8 16. Qd2 Kh7 17. Nd5 a5 18. h4 Nde5 19. h5 g5 20. Bxg5 hxg5 21. Nxg5+ Kg8 22. h6 Bxh6 23. Nxe6 Bxd2 24. Nxd8 Bxc1 25. Nxc6 bxc6 26. Nc7 Bh6 27. Nxe8 Rxe8 28. f4 Ng4 29. Bxc6 Rb8 30. Rb1 Bg7 31. Kg2 Bd4 32. Kf3 Nf6 33. g4 Bc5 34. g5 Ne8 35. Bxe8 Rxe8 36. e4 Kg7 37. f5 Rb8 38. Kf4 Bd4 39. Rd1 Be5+ 40. Kg4 a4 41. Rd3 Rb4 42. Kh5 a3 43. Rd5 Rxb3 44. axb3 a2 45. Ra5 a1=Q 46. Rxa1 Bxa1 47. b4 Bd4 48. b5 Bc5 49. f6+ exf6 50. gxf6+ Kxf6 51. Kh6 Ke5 52. Kg7 Kxe4 53. Kxf7 Kd4 54. Ke6 Kxc4

[Assistant] b6


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

[User] 1. d4 Nf6 2. e4 Nxe4 3. Bd3 d5 4. Ne2 e6 5. O-O Be7 6. c4 Nf6 7. Nbc3 c6 8. cxd5 exd5 9. Nf4 O-O 10. Re1 Bg4 11. Qc2 Nbd7 12. Bd2 Nb6 13. Re3 h6 14. Rg3 Qd7 15. h3 Be6 16. Re1 Kh8 17. Qc1 Ng8 18. Bb1 Bf5 19. Nh5 Bxb1 20. Nxg7 Bh7 21. Bxh6

[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. e4 c5 2. Nc3 e6 3. Nf3 h6 4. d4 cxd4 5. Qxd4 a6 6. e5 d5 7. exd6 Qxd6 8. Qxd6 Bxd6 9. Be3 Nf6 10. O-O-O Nbd7 11. Rxd6 Ke7 12. Rd2 b5 13. Bd3 Bb7 14. Re1 Rac8 15. Nd4 Nc5 16. Nb3 Ncd7 17. Kb1 Rhe8 18. f3 Kf8 19. Be4 Bxe4 20. Nxe4 Nxe4 21. fxe4 Ne5 22. Bf4 Nc4 23. Rd7 a5 24. Nd4 b4 25. Nb5 Rc6 26. Nd6 Nxd6 27. Bxd6+ Kg8 28. Be5 Rec8 29. c3 Rc4 30. b3 R4c6 31. c4 Rc5 32. Bd4 R5c6 33. Rd1 f6 34. Ra7 e5 35. Be3 a4 36. Rxa4 Kh7 37. Rxb4 Ra8 38. Kb2 Rca6 39. a4 Rc8 40. g4 Rac6 41. Rd5 Kg6 42. h4 h5 43. gxh5+ Kxh5 44. Rdb5 Kxh4 45. Rb8 Kg4 46. Rxc8 Rxc8 47. a5 g5 48. a6 Kf3 49. a7 Ra8 50. Rb8 Rxa7 51. Bxa7 Kxe4 52. Rf8 f5 53. Bb8 g4 54. Bxe5 Kxe5 55. Re8+ Kf4 56. c5 Kg3 57. c6 f4 58. c7 f3 59. c8=Q Kg2 60. Qc7 g3 61. Qf4 f2 62. Rf8 Kg1 63. Qf3 g2 64. Qxf2+

[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] 1. b3 c6 2. Bb2 d5 3. Nf3 Nf6 4. e3 Bg4 5. Be2 Nbd7 6. O-O e6 7. Nc3 Bd6 8. h3 Bxf3 9. Bxf3 a5 10. a4 O-O 11. Re1 e5 12. d3

[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. Nf3 Nf6 3. Bf4 c6 4. e3 Bg4 5. c4 e6 6. Qb3 Qb6 7. c5 Qxb3 8. axb3 Nbd7 9. Ne5 Nxe5 10. Bxe5 Nd7 11. Bg3 a6 12. Nc3 Be7 13. b4 O-O 14. Bd3 f6 15. O-O e5 16. f3 Bh5

[Assistant] Bf5


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

[User] 1. Nc3 e5 2. f4 exf4 3. Nf3 d6 4. d4 g6 5. Bxf4 Bg7 6. e4 Ne7 7. Bc4 c6 8. Bxf7+ Kxf7 9. O-O Kg8 10. Qd2 h6 11. Rae1 Nd7 12. Qd3 Nf8 13. e5 d5 14. h3 Bf5 15. Qe2 Ne6 16. Bd2 g5 17. g4 Bg6 18. h4

[Assistant] Qd7


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

[User] 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. c3 d6 6. Bb3 a6 7. Nbd2 O-O 8. Nf1 Ba7 9. h3 Ne7 10. g4 Ng6 11. Ng3 d5 12. Bc2 dxe4 13. dxe4 Qxd1+ 14. Bxd1 Re8 15. Bc2 b5 16. Be3 Bxe3 17. fxe3 Bb7 18. O-O-O Rad8 19. Rxd8 Rxd8 20. Rd1 Rxd1+ 21. Kxd1 Nf8 22. Nxe5 Ne6 23. Ke2 Nc5 24. Kf3 Ne8 25. Nf5 f6 26. Nd3 Nxd3 27. Bxd3 Kf7 28. Kf4 g5+ 29. Kf3 Nd6 30. Nxd6+ cxd6 31. b3 Ke6 32. c4 bxc4 33. Bxc4+ Ke5 34. Bd5 Bxd5 35. exd5 Kxd5 36. e4+ Kd4 37. a3 a5 38. b4 axb4 39. axb4 Kc4 40. Ke3 d5 41. exd5 Kxd5 42. Kd3 h6 43. b5 Kc5 44. Ke4 Kxb5 45. Kf5 Kc6 46. Kxf6 Kd6 47. Kg6 Ke6 48. Kxh6 Kf6 49. Kh5 Kg7 50. Kxg5 Kf7 51. h4 Kg7 52. h5 Kh7 53. h6

[Assistant] Kg8


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

[User] FEN: r4rk1/1p3pp1/2n1p3/p3q1N1/2P3QP/3B4/5P2/3Rb1K1 w - - 0 28

[Assistant] Qh5


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

[User] FEN: r4nk1/pp2brB1/2p1pn1Q/8/3P4/2N3q1/PPP2PPP/R5K1 w - - 0 19

[Assistant] Qh8#


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

[User] FEN: 5k2/5ppp/8/p1pP1PPP/3p4/PP6/8/4K3 b - - 0 37

[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. e4 c5 2. d4 e6 3. c3 d5 4. Nf3 dxe4

[Assistant] Ne5


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

[User] 1. e4 c5 2. c3 Nc6 3. d4 d5 4. exd5 Qxd5 5. Nf3 Bg4 6. Be2 cxd4 7. cxd4 e6 8. Nc3 Qd6 9. d5 exd5 10. Qxd5 Qxd5 11. Nxd5 O-O-O 12. Nc3 Nf6 13. Be3 Bb4 14. Rc1 Nd5 15. O-O Nxe3 16. fxe3 Rhe8 17. Nd4 Bxe2 18. Nxc6 Bxf1 19. Nxd8 Kxd8 20. Rxf1 f6 21. Kf2 Bc5 22. Re1 a6 23. Kf3 b5 24. Ne4 Be7 25. Rd1+ Kc7 26. Rc1+ Kd7 27. Rc2 Ke6 28. Nc5+ Bxc5 29. Rxc5 Kd6 30. Rc3 Re5 31. e4 b4 32. Rc8 Ra5 33. a3 bxa3 34. bxa3 Rxa3+ 35. Kf4 Ke6 36. Rc7 g5+ 37. Kg4 Ra4 38. Rxh7 Rxe4+ 39. Kf3 Rf4+ 40. Ke3 Ra4 41. Ra7 Kf5 42. h3 Ra3+ 43. Kf2 Kf4 44. Rd7 Ra2+ 45. Kg1 a5 46. Rd4+ Kf5 47. Rd6 Kg6 48. Ra6 Kf5 49. Kh2 a4 50. Kg3 Ra3+ 51. Kf2 Ke5 52. Ke2 f5 53. Kf2 Kf4 54. Rb6 Ra2+ 55. Kf1 Kg3 56. Rb5 Kf4 57. Rc5 a3 58. Kg1 g4 59. hxg4 Kxg4 60. Rc4+ f4 61. Kh2 Rb2 62. Ra4 a2 63. Ra8 f3 64. Rg8+ Kh5

[Assistant] Ra8


[System] You are a chess 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. f4 g6 4. Nf3 Bg7 5. d4 Nf6 6. Bd3 O-O 7. Be3 Nfd7 8. e5 dxe5 9. fxe5 Nb6 10. O-O Nd5 11. Nxd5

[Assistant] cxd5


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

[User] FEN: 1r4k1/p4pp1/2q4p/2pp4/2P1n3/1P3P2/P1Q2P1P/3RR1K1 b - - 0 23

[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: 4r1k1/1R3pp1/p1p4p/2Pn4/1P5P/2Bp2P1/1P3P2/5K2 b - - 3 28

[Assistant] Nxc3


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

[User] 1. d4 Nf6 2. Bg5 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 h6 6. Bh4 b6 7. e4 Bb7 8. f3 d6 9. Bd3 Nbd7 10. Ne2 c5 11. Bb5 O-O 12. e5 dxe5 13. Bxd7 Qxd7 14. dxe5 Qxd1+ 15. Rxd1 Nd5 16. c4 Ne3 17. Rd7 Bc6 18. Rc7 Nxg2+ 19. Kf2 Nxh4 20. Rxc6 Rfd8 21. Rd6 Nf5 22. Rxd8+ Rxd8 23. a4 Rd2 24. Re1 Nd4 25. c3 Nxe2 26. Rxe2 Rxe2+ 27. Kxe2 f5 28. h4

[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 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 Nc6 6. Nc3

[Assistant] g6


[System] You are a chess 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. e3 Nf6 4. Bd3 Nbd7 5. Nbd2 c5 6. b3 Be7 7. Bb2 O-O

[Assistant] O-O


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

[User] 1. Nf3 d6 2. g3 e5 3. Bg2 f5 4. d3 Nf6 5. O-O Be7 6. c4 O-O 7. Nc3 a5 8. Bg5 Na6 9. Bxf6 Bxf6 10. Nd5 c6 11. Nxf6+ Qxf6 12. Rb1 Be6 13. a3 Nc5 14. b4 axb4 15. axb4 Na4 16. b5

[Assistant] Nc3


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

[User] 1. e4 e6 2. Nc3 d5 3. d4 f5 4. exd5 exd5 5. Qf3 Nf6 6. Bd3

[Assistant] g6


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

[User] 1. d4 d5 2. Nf3 c6 3. e3 Nf6 4. c4 e6 5. Nc3 a6 6. Be2 dxc4 7. Bxc4 b5 8. Be2 b4 9. O-O bxc3 10. bxc3 Be7 11. Bd2 c5 12. c4 cxd4 13. exd4 O-O 14. Qc2 Bb7 15. Bd3 h6 16. Bc3 Nc6 17. Rad1 Nb4 18. Bxb4 Bxb4 19. Rb1 Qe7 20. a3 Bd6 21. d5 exd5 22. Rfe1 Qc7

[Assistant] c5


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

[User] 1. e4 d5 2. e5 c5 3. d4 Nc6 4. c3 Bf5 5. a3 Bg6 6. b4 e6 7. bxc5 f6 8. exf6 Nxf6 9. Nf3 e5 10. Be2 e4 11. Ng5 Qd7 12. h4 h6 13. Nh3 Be7 14. Bf4 Bf7

[Assistant] Bg3


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

[User] FEN: r7/3k1p2/3P3p/8/8/R5P1/1K5P/8 b - - 0 40

[Assistant] Rxa3


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

[User] 1. d4 c6 2. Bf4 d5 3. e3 Bf5 4. c4

[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. d4 e6 2. Nf3 d5 3. c4 Nf6 4. Nc3 Be7 5. g3 O-O 6. Bg2 c5 7. O-O cxd4 8. Qxd4 Nc6 9. Qd2 d4 10. Nb5 e5 11. Na3 Ne4 12. Qc2 Bf5 13. Qb3

[Assistant] Nc5


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

[User] 1. d4 d6 2. e4 c6 3. c4 e6 4. f4 f6 5. Nc3 g6 6. Nf3 Bg7 7. Bd3 Nh6 8. Be3 Nf7 9. Qd2 O-O 10. O-O-O f5 11. h3 a6 12. g4

[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: 2r3k1/bb3pp1/p4q1p/1p1pQ3/7P/1P1B2B1/PN3PP1/R5K1 b - - 2 23

[Assistant] Bxf2+


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

[User] 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nc3 Nbd7 6. Qb3 Bd6 7. Bd3 O-O 8. e4 dxc4

[Assistant] Qxc4


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

[User] FEN: 2N5/p2Q1p1p/4pp1b/2kb4/P2q4/8/1P3PPP/6K1 w - - 6 34

[Assistant] Qb5#


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

[User] 1. g3 d5 2. Bg2 c6 3. Nf3 g6 4. O-O Bg7 5. d3 e5 6. c3 f5 7. Nbd2 e4 8. dxe4 fxe4 9. Ng5 Nf6 10. Qb3 Na6 11. e3 Nc5 12. Qc2 h6 13. Nh3 O-O 14. Nf4 Bf5 15. Nb3 Nd3 16. Nd4 Nxf4 17. exf4 Qd7 18. Nxf5 Qxf5 19. Be3 g5 20. fxg5 hxg5 21. c4

[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] FEN: 4k3/6R1/p2rp3/4N1p1/1p1Pn1P1/7r/PP6/1K3R2 b - - 1 26

[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] FEN: 8/5p1k/P2p1P1p/6p1/4P3/1Rr4r/8/1R2NK2 b - - 5 56

[Assistant] Rxb3


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

[User] FEN: 8/p2k4/5b2/5K2/5P1P/8/8/8 w - - 1 68

[Assistant] Kxf6


[System] You are a chess 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 g6 4. c3 Bg7 5. O-O Nge7 6. Re1 O-O 7. d3 d6 8. Bg5 f6 9. Be3

[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] FEN: 2r5/4Qrkp/2p3p1/3P1p2/P1R2q2/7P/6P1/2R3K1 b - - 0 32

[Assistant] Qxc1+


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

[User] 1. e4 c6 2. d4 d6 3. e5 Nd7 4. exd6 exd6 5. Nf3 Ngf6 6. Be2 Be7 7. O-O O-O 8. c4 Re8 9. Nc3 Nf8 10. Be3 Ng6 11. Qd2 Qc7 12. h3 Bf5 13. Rad1 Ne4 14. Nxe4 Bxe4 15. Ne1 Rad8 16. b3 d5 17. c5 b6 18. f3 Bf5 19. b4 h6 20. f4 Bh4 21. g4 Be4

[Assistant] Nf3


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

[User] 1. Nf3 c6 2. e4 d5 3. d3 Nf6 4. exd5 cxd5 5. Be2 Bg4 6. O-O Bxf3 7. Bxf3 e6 8. g3 Nbd7 9. Bg2 Be7 10. Nd2 O-O 11. Kh1 Rc8 12. f4 Qc7 13. Nf3 Qxc2 14. Qxc2 Rxc2 15. Be3 Rfc8 16. Rac1 Rxc1 17. Rxc1 Rxc1+ 18. Bxc1 Bc5 19. Bd2 a6 20. d4 Bb6 21. Bc3 Ne4 22. a3 Nf2+ 23. Kg1 Ne4 24. Kf1 Nxc3 25. bxc3 Ba5 26. Ke2 Bxc3 27. Kd3 Bb2 28. Ne5 Nxe5+ 29. fxe5 Bxa3 30. Kc3 Bb4+ 31. Kxb4 b6 32. Bf1 Kf8 33. Bxa6 f6 34. Kb5 fxe5 35. dxe5 g5 36. Kxb6 Kg7 37. Kc5 Kg6 38. Kd6 Kf5 39. Bc8 d4 40. Bxe6+ Kg6 41. Bc4 Kg7 42. Bd3 Kf8 43. e6 Ke8 44. e7 Kf7

[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. e3 c5 2. g3 d5 3. Bg2 e6 4. Ne2 Nf6 5. c4 Nc6 6. cxd5 exd5 7. d4 Be6 8. dxc5 Bxc5 9. O-O O-O 10. Nbc3 Rc8 11. Bd2 d4 12. exd4 Nxd4 13. Nxd4 Bxd4 14. Re1 Qb6 15. Be3 Bxe3 16. Rxe3 Qxb2

[Assistant] Ne4


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

[User] 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. Bf4 Nc6 6. e3 Bf5 7. Bd3 Bg6 8. Bxg6 hxg6 9. Nf3 e6 10. O-O Bd6 11. Bxd6

[Assistant] Qxd6


[System] You are a chess 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 c5 2. Nf3 e6 3. e3 d5 4. d4 cxd4 5. exd4 Nc6 6. c3 Nf6 7. Bd3 Bd6 8. O-O O-O 9. Ne5 Re8 10. Qf3 Ne7 11. Qh3 Nf5 12. Bxf5 exf5 13. Nd2 b5 14. Ndf3 Qb6 15. Ng5 Bxe5 16. fxe5 h6

[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] FEN: 8/1R4pp/5p2/3p1pk1/2pPn2N/r2nP2P/3N1PP1/6K1 w - - 5 28

[Assistant] Ndf3+


[System] You are a chess 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 Nf6 4. e5 Nd5 5. Nf3 d6 6. Bc4 Nb6 7. Bxf7+ Kxf7 8. Ng5+ Kg8 9. e6 Qe8 10. cxd4 d5 11. Nc3 Qg6 12. h4 Bxe6 13. Qe2 Bf7 14. h5 Qf6 15. Be3 h6 16. Nf3 Nc6 17. O-O-O e5 18. dxe5 Nxe5 19. Bd4 Qf4+

[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] 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. cxd5 cxd5 5. Nf3 Nc6 6. Bf4 Bg4 7. e3 e6 8. Bb5 Bd6 9. O-O Bxf4 10. exf4 O-O 11. h3 Bh5 12. g4 Bg6 13. Ne5 Nxe5 14. dxe5 Nd7 15. Bd3 Nc5 16. Bxg6 hxg6 17. Kg2 Qb6 18. f3 Rfd8 19. Qd2 d4 20. Ne2 d3 21. Nc3 Rac8 22. h4 Nd7 23. Kg3 Nf8 24. h5 Qc7 25. Rh1 Qd7 26. h6 Qd4 27. hxg7 Kxg7 28. Rae1 Nh7 29. Re4 Qd7 30. f5 Rh8 31. Qh6+ Kg8 32. fxg6

[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] 1. d3 d6 2. Nd2 Bg4 3. Ngf3 Bxf3 4. Nxf3 Nf6 5. g3 c6 6. Bg2 Nbd7 7. O-O Qc7 8. Rb1 e5 9. b4 Be7 10. a4 Rb8 11. b5 c5 12. Nd2 b6 13. Nc4 O-O 14. e4 d5 15. exd5 Bd6 16. Ne3 Rfe8 17. Bd2 g6 18. Bc3 Bf8 19. Qd2 Bg7 20. Rbe1 Qd6 21. Nc4 Qc7 22. d6 Qd8 23. Nxe5 Nxe5 24. Bxe5 Rc8 25. Qc3 Nh5 26. Bxg7 Nxg7 27. Bh3 Ne6 28. Bxe6 fxe6 29. Qe5 Qd7 30. Re4 Rcd8 31. Rfe1 Qxd6 32. Qg5 Qd5 33. Qf6 Qf5 34. Qc3 Rf8 35. R1e2 Rde8 36. Re5 Qf6 37. Qc4

[Assistant] Rf7


[System] You are a chess 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/pp3ppp/2nb3q/3p4/3P2P1/5QN1/PPP3PP/RN3RK1 b - - 4 14

[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. e4 c6 2. d4 e6 3. Nd2 d5 4. Ngf3 dxe4 5. Nxe4 Nf6 6. Bd3 Nxe4 7. Bxe4 e5 8. Nxe5 Bd6 9. Nf3 O-O 10. O-O Bg4 11. h3 Bxf3 12. Qxf3 Qf6 13. Qxf6 gxf6 14. c3 Nd7 15. Re1 Rfe8 16. Bh6

[Assistant] Re7


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

[User] 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Be7 6. Qc2 b6 7. Bd3 Bb7 8. O-O

[Assistant] Nbd7


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

[User] FEN: 4k3/5p2/5Pp1/4P1r1/4K2R/8/8/8 w - - 0 62

[Assistant] Rh8+


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

[User] 1. e4 c6 2. c3 d5 3. exd5 cxd5 4. d4 Nc6 5. Nf3 Nf6 6. Bd3 Bg4 7. h3 Bh5 8. g4 Bg6 9. Bf4 e6 10. Ne5 Bd6 11. O-O Bxd3 12. Qxd3 O-O

[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] FEN: 5r1k/pr4p1/2p2P1p/3nP3/6R1/1P6/P1Pb2PP/5R1K w - - 0 28

[Assistant] fxg7+


[System] You are a chess 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 Nb6 4. Bd3 d6 5. exd6

[Assistant] cxd6


[System] You are a chess 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. e4 Bg7 3. Nf3 c5 4. d4 Nc6 5. d5

[Assistant] Nd4


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

[User] 1. e4 c6 2. c4 d5 3. exd5 cxd5 4. d4 Nf6 5. Nc3 Nc6 6. Nf3 Bg4 7. cxd5 Nxd5 8. Be2 e6 9. O-O Be7 10. h3 Bh5 11. Be3 O-O 12. Qd2 Rc8 13. Rac1 Bg6 14. Rfe1 Bf6 15. Bg5 Re8 16. Bxf6 Nxf6 17. Red1 Ne4 18. Nxe4 Bxe4 19. Qe3 Bg6 20. Ne5

[Assistant] Qd6


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

[User] 1. d4 c6 2. e3 d5 3. Bd3 Nf6 4. f4 g6 5. Nf3 Bg7

[Assistant] Nbd2


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

[User] FEN: 3br1k1/5p1p/p1bP1Bp1/1p6/qP3P2/P1N3Q1/4r1PP/4RR1K b - - 6 27

[Assistant] Rxe1


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

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. g3 Ne7 6. Bg2 Nbc6 7. O-O Nxd4 8. Qxd4 Nc6 9. Qc3 b5 10. a3 Bb7 11. Rd1 Rc8 12. Qe1 Qc7 13. Nc3 d6 14. Bf4 Ne5 15. Rd4

[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: 5b1r/1k2p1pp/1pq5/8/P7/2n2QP1/5P1P/1R3K1R w - - 3 28

[Assistant] Qxc6+


[System] You are a chess 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 c6 2. Nf3 d5 3. d4 Nf6 4. cxd5 e6 5. dxe6 Bxe6 6. Nc3 Bd6 7. Bg5 O-O 8. Ne5 Nbd7 9. Nxd7 Bxd7 10. Bxf6 Qxf6 11. e3 Rfe8 12. Qf3 Qxd4 13. Be2 Qe5 14. g3 Qe7 15. O-O Be6 16. Ne4 Bc7 17. Rad1 Bd5 18. Bd3 Bxe4 19. Bxe4 Qxe4 20. Qxe4 Rxe4 21. Rd7 Rc8 22. f3 Rxe3 23. Rfd1 Ree8 24. f4 Bb6+ 25. Kg2 Red8 26. Kh3 Rxd7 27. Rxd7 Kf8 28. Rxb7 Rc7 29. Rb8+ Ke7 30. Rh8 h6 31. Rg8 Kf6 32. Re8 c5 33. Re2 c4 34. Rc2 Bd4 35. b3 cxb3 36. Rxc7 bxa2 37. Rc6+ Ke7 38. Ra6 a1=Q 39. Rxa1 Bxa1 40. Kg4 Bf6 41. Kf3 g5 42. Ke2 g4 43. Kd3 h5 44. Ke4 a5 45. Kd3 Ke6 46. Kc2 Kf5 47. Kb3 Ke4 48. Ka4 Kf3 49. Kxa5 Kg2 50. Kb4 Kxh2 51. Kc4 Kxg3 52. Kd5 h4 53. f5 h3 54. Ke4 h2 55. Kd5 h1=Q+ 56. Kd6 Qf3

[Assistant] Kd7


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

[User] 1. e4 c6 2. d4 d5 3. e5 c5 4. dxc5 Nc6 5. Bb5 a6 6. Bxc6+

[Assistant] bxc6


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

[User] 1. d4 g6 2. c4 Bg7 3. Nc3 e6 4. Nf3 Ne7 5. e4 O-O 6. Bg5 d6 7. Bxe7 d5 8. Bxd8 Rxd8 9. exd5 exd5 10. Nxd5 c5 11. Ne7+ Kh8 12. Nxc8 Rxc8

[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. c4 c5 2. g3 e6 3. Bg2 Nf6 4. Nc3 Qc7 5. d3 d6 6. e4 a6 7. Nge2 Nbd7 8. O-O Be7 9. Rb1 O-O 10. a3 b6 11. b4 Bb7 12. h3 cxb4 13. axb4 Rac8 14. Kh2 Rfe8 15. f4 Qb8 16. Be3 Bf8 17. Na4 Ba8 18. Qd2 b5 19. cxb5 axb5 20. Nac3 g6 21. Rfc1 Bg7 22. Nd1 h5

[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 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Be3 b5 8. Bb3 b4 9. Na4 Nxe4 10. Nb6 Qxb6 11. Nxe6 Qxe3+

[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. d4 d5 2. c4 Nf6 3. Nf3 g6 4. cxd5 Bg7 5. Nc3 Nxd5 6. e4 Nxc3 7. bxc3 c5 8. Bc4 O-O

[Assistant] Rb1


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

[User] 1. d4 d5 2. e3 e6 3. Nf3 Nf6 4. c4 Be7 5. cxd5 exd5 6. Nc3 O-O 7. Be2 Re8 8. O-O c6 9. a3 Nbd7

[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: 1q5k/4QRbp/p5p1/4p3/1p2P1bP/8/PPr1N1P1/R3K3 b Q - 1 26

[Assistant] Rxe2+


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

[User] FEN: 3rr2k/1pp2p1n/p3b2Q/4P1B1/4q3/1P6/1PP3PP/4R2K w - - 0 26

[Assistant] Bf6+


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

[User] FEN: 3r2k1/1bp1qp2/pp1r1n1p/3Pp1p1/B1P3QB/8/PP3PPP/3RR1K1 w - - 4 23

[Assistant] Bxg5


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

[User] 1. e4 e6 2. Nc3 d5 3. exd5 exd5 4. d4 c6 5. Bd3 Nf6 6. Nge2 Bd6 7. O-O O-O 8. Bf4 Bg4 9. f3 Bh5 10. Bxd6 Qxd6 11. Ng3 Bg6 12. Nf5 Bxf5 13. Bxf5 Nbd7 14. Qd3 Rae8 15. Ne2 Re7 16. Ng3 Rfe8 17. c3 g6 18. Bh3 b5 19. Qd2 a5 20. Rfe1 a4 21. Rxe7 Qxe7 22. Kf2 Kg7 23. Re1 Qxe1+ 24. Qxe1 Rxe1 25. Kxe1 Nf8 26. Ke2 Ne8 27. Ke3 Nd6 28. b3 axb3 29. axb3 f5 30. Ne2 Kf6 31. g3 h6 32. Bf1 g5 33. f4 Ne6 34. fxg5+ hxg5 35. h4 gxh4 36. gxh4 Ne4 37. Bg2 f4+ 38. Nxf4 Nxf4 39. Bxe4 Nh5 40. Bf3 Ng7 41. Kf4 Ne6+ 42. Kg4 b4 43. cxb4 Nxd4 44. b5 Nxb5 45. h5 Nd4 46. b4 Nc2 47. b5 cxb5 48. Bxd5 b4 49. h6 Nd4 50. Kf4 Kg6 51. Ke4 Nc2 52. Kd3 Ne1+ 53. Kc4 Nc2 54. Kb3 Ne3 55. Kxb4 Nxd5+

[Assistant] Kc4


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

[User] FEN: 3r2k1/pp3ppp/2p5/5Q2/4P3/8/2q3PP/5RK1 w - - 0 24

[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 Nf6 2. c4 e6 3. Nf3 c5 4. g3 cxd4 5. Bg2 Nc6

[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 c6 3. Nc3 d5 4. Nf3 Bf5 5. g3 e6 6. Bg2 Be7 7. O-O O-O 8. b3 Ne4 9. Bb2 Nxc3 10. Bxc3 Be4 11. Nd2 Bxg2

[Assistant] Kxg2


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

[User] 1. Nc3 e6 2. Nf3 f5 3. e4 Nf6 4. exf5 exf5 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. Re1 Ne4 9. Bg5 Nxg5 10. Nxd5 Bxh2+ 11. Nxh2 Qxd5 12. b3 Kh8 13. Bc4 Qd6 14. f4 Ne4 15. Qf3 Nc6 16. Rad1 Be6 17. c3 Bxc4 18. bxc4 Qg6 19. c5 Na5 20. Qh3 Nc4 21. Nf3 b5 22. Ne5 Qh6 23. Qxh6 gxh6 24. Rb1 Nxe5 25. fxe5 Rab8 26. Rb4 c6 27. Rc1 Nxc3 28. Rxc3 a5 29. Rb2 a4 30. Rf2 Rb7 31. a3 Kg7

[Assistant] Rcf3


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

[User] FEN: 1r5k/p1p4p/2p3r1/3pR1n1/5p2/1NP2P2/PP4PP/R1B3K1 b - - 0 25

[Assistant] Nxf3+


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

[User] 1. d4 Nc6 2. c4 e6 3. d5 Ne5 4. e4 Nf6 5. Nc3 Bb4 6. Bd3 Bxc3+ 7. bxc3 d6 8. Ne2 O-O 9. O-O

[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 b6 2. d4 Bb7 3. Bd3 e6 4. Nf3 d5 5. e5 Ba6 6. Bxa6 Nxa6 7. c3 Qd7 8. O-O c5 9. a3 Ne7 10. b4

[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. Nf3 Nc6 2. b3 e5 3. Bb2 e4 4. Nd4 d5 5. e3 Nxd4 6. Bxd4 c5 7. Bb2 a6 8. Nc3 Be6 9. Be2 Qg5 10. O-O Bd6 11. f4 exf3 12. Bxf3 O-O-O 13. Qe2 h5 14. Na4 Nh6 15. d4 Ng4 16. h3 Nxe3 17. Rf2 Ng4 18. Rff1 Nh2 19. Rf2 Nxf3+ 20. Rxf3 Bg4 21. hxg4 hxg4

[Assistant] Rxf7