[System] You are a chess 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. g3 d5 3. Bg2 Nf6 4. Nf3 Bf5 5. O-O e6 6. d3 h6 7. b3 Bh7 8. Bb2 Nbd7 9. Nbd2 Be7 10. Rc1 O-O 11. Rc2 Rc8 12. Qa1 a6 13. Rfc1 Re8 14. cxd5 exd5 15. Ne5 Nxe5 16. Bxe5 Bf8 17. Bxf6 Qxf6

[Assistant] Qxf6


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

[User] 1. Nf3 Nf6 2. d4 d5 3. g3 Bg4 4. Bg2 c6 5. Ne5 Bf5 6. c4 e6 7. Qb3 Qb6 8. Nc3 Nbd7 9. Nxd7 Nxd7 10. Qxb6 axb6 11. cxd5 exd5 12. O-O Nf6 13. Bg5 Be7 14. a3 h6 15. Bf4 O-O 16. Rac1 b5 17. Rfe1 b4 18. axb4 Bxb4 19. Red1 Rfe8 20. Bf3 g5 21. Be3 Kg7 22. Ra1 Bc2 23. Rdc1 Bb3 24. h3 Kg6 25. Bd2 h5 26. e3 g4 27. hxg4 hxg4 28. Be2 Bd6 29. Kg2 b5 30. Bd1 Bxd1 31. Nxd1 Rxa1 32. Rxa1 Ne4 33. Be1 Kf5 34. Ra6 Rc8 35. Nc3 Ke6 36. Kf1 f6 37. Kg2 Kd7 38. Ne2 Kc7 39. Nf4 Bxf4 40. gxf4 Kb7 41. Ra1 c5 42. Bc3 b4 43. Be1 cxd4 44. exd4 Rc2 45. Kf1 Rxb2 46. Ra5 b3 47. Rxd5 Kc6 48. Rc5+ Nxc5 49. dxc5 Rb1 50. Ke2

[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. d4 c5 2. d5 Nf6 3. c4 b5 4. cxb5 a6 5. b6 g6 6. Nc3 d6 7. e4 Bg7 8. h4 Qxb6 9. Nf3 Bg4 10. Qa4+ Bd7 11. Qc2 O-O 12. h5 Nxh5 13. Ng5 Nf6 14. f4 h6 15. e5 Bf5 16. Bd3 Bxd3

[Assistant] Qxd3


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

[User] 1. d4 c6 2. c4 d6 3. Nc3 Nd7 4. Nf3 Qc7 5. Bg5 h6 6. Bh4 Ngf6 7. e3 g5

[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: r1b2rk1/ppp2p1p/1qn1n1pB/1N2p3/2Bp3Q/P7/5PPP/4R1K1 w - - 4 23

[Assistant] Qf6


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

[User] FEN: 3r3k/6p1/7p/1pQ5/2pq4/5P2/P6P/4R2K w - - 0 40

[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. Nf3 b6 3. g3 Bb7 4. Bg2 e6 5. O-O Be7 6. c4 O-O 7. Nc3 Ne4 8. Bd2 Nxc3 9. Bxc3 Bf6 10. Rc1

[Assistant] d6


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

[User] FEN: 6R1/ppkn1Q2/2pb2r1/8/P4B2/3P2qP/1PP3B1/R6K b - - 2 28

[Assistant] Qxg2#


[System] You are a chess 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. c4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. e4 Bg7 7. Be3 O-O 8. Be2 d6 9. O-O Bd7 10. f3 Rc8 11. Rc1 Ne5 12. b3 a6 13. Qd2 Re8 14. h3 Qa5 15. f4 Nc6 16. Nxc6 Bxc6 17. Bf3 h5 18. Qf2 b5 19. Bb6 Qb4 20. Nd5 Bxd5 21. cxd5 Qa3 22. e5 dxe5 23. Rxc8 Rxc8 24. fxe5 Nh7 25. Bd4 Qb4 26. Rd1 Rd8 27. g4 Ng5 28. Bg2 hxg4 29. hxg4 Qa5 30. Rf1 Qb4 31. Qf4 f6 32. exf6 exf6 33. Qc7 Qd6 34. Qc3 Nh7 35. Be4 Ng5

[Assistant] Bg2


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

[User] FEN: 1k5r/ppp5/2p5/3n4/5pQ1/3P1P1r/PPP2K2/6R1 b - - 3 26

[Assistant] Rh2+


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

[User] 1. e4 e6 2. Qe2 d5 3. exd5 Qxd5 4. Nf3 Qd8 5. g3 b6 6. Bg2 Bb7 7. O-O Nd7 8. Rd1 Ngf6 9. d4 Be7 10. c4 O-O 11. a3 c5 12. Nc3 cxd4 13. Nxd4 Bxg2 14. Kxg2 Qc8 15. Kg1 Qb7 16. Ndb5 Rac8 17. Be3 a6 18. Nd4 Nc5 19. b3 Rfd8 20. Rac1 Bf8 21. h3 e5 22. Nf3 Nxb3 23. Rxd8 Nd4 24. Bxd4 exd4 25. Rxd4 Re8 26. Qd1 Qc6 27. Kg2

[Assistant] h5


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

[User] 1. d4 Nf6 2. Bf4 g6 3. e3 Bg7 4. h3 d6 5. Nf3 O-O 6. Nbd2 Nfd7 7. Be2 Nc6 8. Bh2 e5 9. O-O f5 10. c3 e4 11. Ne1 Nf6 12. a4 Ne7 13. c4 g5

[Assistant] Qc2


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

[User] FEN: r1bqk2r/ppppnppp/1b1n4/1B1PN3/6Q1/2P5/PP3PPP/RNB1K2R w KQkq - 2 9

[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. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 Nf6 5. Nf3 g6 6. Be2 Bg7 7. h3 O-O 8. O-O c6 9. Be3 Nbd7 10. Qd2 Nb6 11. Bh6 Bf5 12. Bxg7 Kxg7 13. Rfe1 Ne4 14. Nxe4 Bxe4 15. c3 Bf5 16. Qe3 Re8 17. Ne5 f6 18. Ng4 Bxg4 19. Bxg4 e5 20. dxe5 Rxe5 21. Qg3 Qe7 22. Rxe5 Qxe5 23. Qxe5 fxe5 24. Rd1 Kf7 25. g3 h5 26. Bf3 Ke7 27. Kg2 Rd8 28. Rxd8 Kxd8 29. Be4 g5 30. h4 gxh4 31. gxh4 Ke7 32. Bg6 Nc4 33. b3 Nd6 34. Bxh5 Ne4 35. c4 Nc3 36. a3 Nb1 37. Bf3 Nd2 38. Be2 Nxb3 39. h5 Nd4 40. Bd3 Kf6 41. Kg3 Ne6 42. Kg4 Nf4 43. Be4 Ne6 44. h6 Nc5 45. Bc2 a5 46. h7 Kg7 47. Kg5 e4 48. Kf4 Kxh7 49. Bxe4+ Kg7 50. Bc2 Kf6 51. Ke3 a4 52. f4 b6 53. Kd4 Ke6 54. f5+ Kf6 55. Kc3 Nd7 56. Bxa4 Ne5 57. Bc2 c5

[Assistant] Be4


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

[User] 1. Nf3 c6 2. g3 d5 3. Bg2 Nf6 4. O-O Nbd7 5. d3 e5 6. c4 Bd6 7. cxd5 cxd5 8. Nc3 O-O 9. Nb5 Bb8 10. b3 Re8 11. Qc2 Nf8 12. Ba3 Ng6 13. Rac1 a6 14. Nc7 Bxc7 15. Qxc7 b5 16. Qxd8 Rxd8 17. Rc7 a5 18. Rfc1 b4 19. Bb2 Re8 20. Nxe5 Nxe5 21. Bxe5 Bg4 22. Bxf6 gxf6 23. f3 Bf5 24. e4

[Assistant] Bg6


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

[User] 1. d4 d5 2. c4 Nc6 3. Nf3 Bg4 4. Nc3 e6 5. Bg5 Be7 6. Bxe7 Ngxe7 7. e3 O-O 8. Qb3 b6 9. cxd5 exd5 10. Rc1 Na5 11. Qc2 Bf5 12. Bd3 Bxd3 13. Qxd3 c5 14. Ng5 g6 15. h4 Nf5 16. dxc5 bxc5 17. Qxd5 Qb6 18. b3 Rad8 19. Qf3 c4 20. bxc4 Nxc4 21. h5 Qb2 22. O-O Nd2 23. Qe2 Qb4 24. Rfd1 Nc4 25. Nce4 Ne5 26. Nf6+ Kg7 27. Nfxh7 Qh4 28. Qb2 f6

[Assistant] Nxf8


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

[User] FEN: 1rr3k1/5ppp/2Q1pn2/p1N3q1/2R5/1P6/5PPP/3R2K1 w - - 1 24

[Assistant] Qxc8+


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

[User] 1. e4 e6 2. Nf3 d5 3. e5 c5 4. b4 Nc6 5. bxc5 Bxc5 6. d4 Bb4+ 7. c3 Ba5 8. Bd3 Nge7 9. h4 Nf5 10. g4 Nfe7 11. Bg5 h6 12. Bf4 Qb6 13. O-O Bd7 14. Na3 Qc7 15. Nb5 Qb6 16. Nd6+ Kf8 17. Rb1 Qd8

[Assistant] Rxb7


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

[User] 1. d4 d5 2. Nc3 Bf5 3. f3 c5 4. e4 dxe4 5. fxe4

[Assistant] cxd4


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

[User] 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Ne7 5. a3 Bxc3+ 6. bxc3 c5

[Assistant] f4


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

[User] 1. e4 c5 2. Nc3 e6 3. g3 a6 4. Bg2 b5 5. Nge2 Bb7 6. O-O f5 7. d3 b4 8. Nb1 fxe4 9. dxe4 Nf6 10. Be3 Bxe4 11. Bxe4 Nxe4 12. Nd2 Nxd2

[Assistant] Qxd2


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Bg5 h6 7. Bxf6 gxf6 8. Qd2 e5 9. Nf3 f5 10. O-O-O fxe4 11. Nxe4 Be6 12. Kb1 d5 13. Nc3 d4

[Assistant] Ne4


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

[User] 1. e4 d6 2. d4 Nd7 3. Bd3 g6 4. f4 Bg7 5. Nf3 c5 6. c3 b6 7. O-O Bb7 8. Qe2 e6 9. Nbd2 Ne7 10. e5 d5 11. Ng5 h6 12. Ngf3 Qc7 13. a4 a6 14. Re1 Nc6 15. Qf2 c4 16. Bc2 b5 17. b3 Nb6 18. axb5 axb5 19. Rxa8+ Bxa8 20. Ba3 Bf8 21. Bd6 Bxd6 22. exd6 Qxd6 23. f5 gxf5 24. Bxf5 Ne7 25. Bc2 Bc6 26. Ne5 Rf8 27. Rf1 Nd7 28. Nxf7 Qa3 29. Nb1 Qb2 30. Nd6+ Kd8 31. Qd2

[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. d4 c5 2. c4 cxd4 3. Qxd4 Nc6 4. Qd1 e6 5. e3 a6 6. Nf3 Qc7

[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] FEN: 8/p1p5/1pP5/4p1p1/PP1Bp1k1/4P1b1/6Kp/8 w - - 0 34

[Assistant] Bxb6


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

[User] FEN: 7k/pp3r1n/8/2pq1n1N/3p2Q1/3Pp1B1/PPP4K/5R2 w - - 0 37

[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] FEN: 3N4/6p1/1p1kn2p/p7/8/P3K2P/2P3P1/8 w - - 10 37

[Assistant] Nxe6


[System] You are a chess grandmaster. 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 Nc6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7 9. Be2 Be7 10. f4 O-O 11. g4 b5

[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] 1. c4 c5 2. Nf3 Nf6 3. g3 d5 4. Bg2 dxc4 5. O-O Nc6 6. Na3 a6 7. Nxc4 b5 8. Ne3 Bb7 9. a4 Qb6 10. axb5 axb5 11. Rxa8+ Bxa8 12. b3 e6 13. Bb2 Be7 14. Qc2 O-O 15. Ra1 Bb7 16. h3 Rd8 17. d3 h6 18. Nh4 Nb4 19. Qd2 Bxg2 20. Nhxg2 Qb7 21. Bc3 Nbd5 22. Nxd5 exd5 23. Be5 Nd7 24. Bb2 Nf8 25. Qf4 Ne6 26. Qe5 Bf6

[Assistant] Qxf6


[System] You are a chess 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

[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: r2r2k1/R4p1p/1p2p1p1/1Pb5/3q4/3B1Q2/2PP1PPP/R5K1 b - - 0 22

[Assistant] Qxa1+


[System] You are a chess grandmaster. 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 Nc6 6. g3 Nxd4 7. Qxd4 g6 8. Bg2 Bg7 9. O-O O-O 10. h3 Be6 11. Qb4 Rb8 12. Be3 b6 13. Qa4 Qc7 14. Nb5 Qd7 15. c4 Bxh3 16. f3 Bxg2 17. Kxg2 Rb7 18. Rfd1 Rc8 19. Rac1 Qc6 20. b3 Nd7 21. Qa3 Ra8 22. Bd4

[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: 2rq1rk1/pp2bppp/2np1n2/3Np3/4P1b1/1NP3P1/PP3PBP/R1BQ1RK1 w - - 1 12

[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. b3 c5 2. Bb2 Nc6 3. Nf3 d5 4. e3 e6 5. Bb5 Bd7 6. O-O Nf6 7. a3 Be7 8. Re1 O-O 9. Nc3 Rc8 10. Ne2 a6 11. Bd3

[Assistant] b5


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e6 7. g4 Be7 8. Bg2 Nc6 9. g5 Nd7 10. Nxc6 bxc6 11. f4 e5 12. h4 exf4 13. Bxf4 Ne5 14. O-O Qb6+ 15. Kh1 Qxb2 16. Qe1 O-O 17. Qg3 Qa3 18. Nd5 Qxg3

[Assistant] Nxe7+


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

[User] FEN: k1r5/p6p/rp1N1p2/8/6np/8/1P2NPP1/2R3K1 w - - 0 27

[Assistant] Rxc8#


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

[User] FEN: 8/5p2/2k1p1p1/p3PP2/P3K1P1/8/8/8 b - - 0 53

[Assistant] gxf5+


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

[User] 1. Nf3 c5 2. g3 e6 3. Bg2 Be7 4. d4 cxd4 5. O-O a6 6. Nxd4 h5 7. Nb3 h4 8. c4 hxg3 9. fxg3 Nc6 10. e4 Nf6 11. Qf3 Ne5 12. Qf2 Nfg4 13. Qe2 Qb6+ 14. Rf2 Nxf2 15. Qxf2 Qxf2+ 16. Kxf2 Rxh2 17. N1d2 Bg5 18. Kg1 Rh8 19. Nf3 Nxf3+ 20. Bxf3 Bxc1 21. Rxc1 d6 22. Rd1 Ke7 23. e5 dxe5 24. Nc5 Rb8

[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 c5 4. O-O Nc6 5. c3 Nf6 6. d3 d6 7. Nbd2 O-O 8. Qc2 Nd7

[Assistant] Re1


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

[User] 1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 Nc6 5. exd5 exd5 6. Bb5 Bd6 7. dxc5 Bxc5 8. O-O Ne7 9. Re1 Bd6 10. Bxc6+ bxc6 11. c4 O-O 12. cxd5

[Assistant] Nxd5


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

[User] 1. e4 e6 2. d4 d5 3. Nc3 c5 4. exd5 exd5 5. dxc5 Nf6 6. Bg5 Bxc5 7. Bb5+ Nc6 8. Qe2+ Be6 9. Nf3 O-O 10. O-O a6 11. Bxc6 bxc6 12. Ne5 Rac8 13. Rad1 h6 14. Bh4 Be7 15. Qf3

[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. d4 c5 2. d5 d6 3. Nc3 Nf6 4. e4 g6 5. Be2 Bg7 6. Nf3 Bg4 7. O-O Bxf3 8. Bxf3 Nbd7 9. Be2 a6 10. a4 O-O 11. Re1 Rb8 12. Bg5 h6 13. Be3 Kh7 14. Qd2 Qa5 15. Ra3 Ng8 16. Kh1 Qc7 17. a5 Rfd8 18. f4 Nf8 19. h4 h5 20. g4 hxg4 21. Bxg4 Nf6

[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: 8/1p6/p1p3k1/P2pP2p/1P1P2K1/2P5/8/8 w - - 0 42

[Assistant] Kf4


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

[User] FEN: 7k/1pr2pp1/q2Np2p/PR1n4/3Q4/7P/P4PP1/6K1 w - - 7 35

[Assistant] Ne8


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

[User] FEN: r3r1k1/1ppqbp2/p2p1nnQ/5N2/4P3/2P4P/PP3PP1/RN2R1K1 w - - 1 18

[Assistant] Qg7#


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

[User] FEN: 3r1r1k/3P2b1/1p4Qp/p4BnP/P1P2RPq/1P2R3/8/6K1 b - - 6 39

[Assistant] Rxd7


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

[User] FEN: 8/5p2/p2k2pp/1p1P3P/1P2K1P1/P4P2/6b1/8 w - - 0 36

[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: Q1kr1r2/1p2b1pp/2pp2n1/3Pn2q/BP2P3/2P2p1P/P5P1/RNB2RK1 b - - 1 17

[Assistant] Kc7


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

[User] FEN: 3q1k2/8/6Q1/3n4/8/2p3N1/5bPK/2B1r3 w - - 1 33

[Assistant] Bh6+


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

[User] 1. Nc3 g6 2. d4 Bg7 3. e4 c5 4. Be3 cxd4 5. Bxd4 Nf6 6. e5 Nh5 7. Nf3 Nc6 8. g3 O-O 9. Bg2 d6 10. exd6 Nxd4 11. Nxd4 Qxd6 12. Nde2 Qb4 13. O-O Qxb2 14. Rb1 Qa3 15. Nd5 e6

[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] FEN: 2r3r1/3q1p1k/4pB1P/p2pP2Q/1p2n3/1P6/2P5/KN4RR b - - 2 34

[Assistant] Rg6


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

[User] 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 b5 5. dxe6 fxe6 6. Bg2 d5 7. cxb5 a6 8. Nc3 Bd6 9. Bg5 axb5 10. Nxb5 Qa5+ 11. Nc3 O-O 12. e3 Kh8 13. Ne2 Ba6 14. O-O Nc6 15. h3 Rab8 16. b3

[Assistant] Be5


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

[User] 1. e4 d5 2. Nc3 Nf6 3. e5 d4 4. exf6 dxc3 5. bxc3 exf6 6. Nf3 c6 7. d4 Be7 8. Be2 O-O 9. O-O Bf5 10. h3 Bg6 11. Bd3 Nd7 12. Re1 Nb6 13. Rb1 Bd6 14. a4 Nxa4 15. Rxb7 Nxc3 16. Qd2 Nd5 17. c4 Bf4 18. Qc2

[Assistant] Bxd3


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

[User] FEN: 8/4Q2p/p4ppk/1p6/5n2/P4N1P/1q3PP1/5K2 w - - 2 43

[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Bc4 Bf5 6. Bd2 c6 7. Nd5 Qd8 8. Nxf6+ exf6 9. c3 Bd6 10. Ne2 Nd7 11. O-O O-O 12. Ng3 Bg6 13. Re1 Re8 14. Qf3 Qc7 15. h3 b5 16. Bb3 a5 17. Nf5 a4 18. Bc2 Bxf5 19. Qxf5 g6 20. Qf3 f5 21. Bg5 Nb6 22. a3 Nc4 23. Rxe8+ Rxe8 24. Rb1 Qd7 25. Bd3 Be7 26. Bxe7 Rxe7 27. Bxc4 bxc4 28. Rd1

[Assistant] Re4


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

[User] FEN: rnb2r1k/pp2p1b1/6Q1/4q1p1/3pB3/8/PPPB2P1/R3K3 w Q - 0 19

[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 e6 2. d4 d6 3. Nc3 Ne7 4. f4 Nd7

[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: 7Q/5p2/6p1/R3pk1p/P2q2PK/7P/5P2/7r b - - 0 41

[Assistant] Qxg4#


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

[User] FEN: 6k1/p4p2/1p2pPpp/2p5/2P2q1P/3Q4/PP3PP1/6K1 w - - 1 29

[Assistant] Qd8+


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

[User] 1. d4 a5 2. Nf3 g6 3. e4 Bg7 4. c3 d6 5. Bd3 Nf6 6. Bg5 O-O 7. Qd2 Nc6 8. Bh6 e5 9. d5 Nb8 10. Bxg7 Kxg7 11. Na3 Bg4 12. h3 Bxf3 13. gxf3 Nh5 14. O-O-O c6 15. Kb1 cxd5 16. exd5 Nd7 17. Bc2 Nc5 18. Nc4 b5 19. Ne3 b4 20. c4 a4 21. Rdg1 b3 22. Bd1 a3 23. Nf5+ Kh8 24. Qh6 bxa2+ 25. Kxa2 axb2+

[Assistant] Kxb2


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

[User] FEN: 2r3k1/1q3p1p/2N1p1p1/2RpP3/p1b2P2/PpQ5/1P4PP/2K5 w - - 2 27

[Assistant] Ne7+


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

[User] 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g3 g6 7. Bg2 Nxd4 8. Qxd4 Bg7 9. O-O O-O 10. Qd3 a6 11. Rd1 Qc7 12. h3 Be6

[Assistant] Be3


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

[User] FEN: 8/1p3p2/2k1p1pp/4P2P/PP4P1/2NK4/8/4b3 b - - 2 41

[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 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. Ngf3 Nc6 7. c3 Qb6 8. O-O cxd4 9. cxd4 Nxd4 10. Nxd4 Qxd4 11. Nf3 Qb6 12. Qa4 a6 13. Qg4 g6 14. a3 Bg7 15. b4 Nxe5 16. Nxe5 Bxe5 17. Rb1 O-O 18. Bh6 Bg7 19. Bxg7 Kxg7 20. h4 h5 21. Qg3 Bd7 22. Qe5+ Kg8 23. Rbe1 Rac8 24. Re3 Qd8 25. Qf4 Bb5 26. Rd1 Bxd3 27. Rdxd3 Rc4 28. Rd4 Rxd4 29. Qxd4 Qd6 30. Rg3 Rc8 31. Qe3 Rc4 32. Qg5 Qf4 33. Qd8+ Kg7 34. Qd7 Rc1+ 35. Kh2 Qxh4+ 36. Rh3 Qf4+ 37. Rg3 Rc3 38. Qe7 Rxg3 39. fxg3 Qe3 40. Qc5 Qxc5 41. bxc5 f5 42. Kh3 e5 43. Kh4 Kf6 44. g4 hxg4 45. g3 g5+ 46. Kh5 f4 47. gxf4 gxf4 48. Kh6 g3

[Assistant] Kh5


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

[User] 1. e4 c5 2. d4 cxd4 3. Nf3 g6 4. c3 Bg7 5. cxd4 d5 6. e5 a6 7. Qa4+ Nc6 8. Nc3 Bg4 9. Be2 e6 10. Bg5 f6 11. exf6 Nxf6 12. O-O O-O 13. Rfe1 Qb6 14. b3 Bxf3 15. Bxf3 Qxd4 16. Qxd4 Nxd4 17. Bd1 Rac8 18. Ne2 Ne4

[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. c3 c5 2. d4 e6

[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: 3rk2r/pp3ppp/2p2n2/2q4P/4P3/2P5/P1Q1N1P1/R3KB1R b KQk - 2 20

[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: 8/6pk/2R3pp/1p3q2/1Q6/P4P1P/1P4PK/4r3 b - - 8 41

[Assistant] Qe5+


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

[User] FEN: 3r2k1/pp3ppp/2ppr3/6q1/6bN/1P1PPP2/PBP3K1/R2Q3R b - - 0 20

[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: 2kr1b2/1p6/p1n4P/8/5B2/P2p1NP1/2r5/3R2KR b - - 0 34

[Assistant] Bc5+


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

[User] FEN: r3k2r/p4pp1/2q1pn1p/P2p4/3P1P2/2b1P3/2BN2PP/R1B2QK1 w kq - 0 17

[Assistant] Ba4


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

[User] 1. d4 d5 2. Nf3 e6 3. e3 c5 4. Nbd2 Nc6 5. b3 Nf6 6. Bb2 Bd6 7. Bd3 O-O 8. O-O a6 9. Ne5 Qc7 10. Nxc6 Qxc6 11. dxc5 Bxc5 12. Bxf6 gxf6 13. Qg4+ Kh8 14. Qh4 f5

[Assistant] c4


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

[User] 1. Nc3 Nf6 2. d4 e6 3. Nf3 d5 4. g3 c5 5. Bf4 cxd4 6. Nxd4 Nc6 7. Bh3 Be7 8. O-O O-O 9. Na4 Bd7 10. Qd3 Nxd4 11. Qxd4 b5 12. Nc5 Rc8 13. Nxd7 Qxd7 14. Rac1 Qc6 15. c3 Qc4 16. Qxc4 bxc4 17. f3 Rfd8 18. b4 a5 19. bxa5 Ra8 20. Rb1 Rxa5 21. Bc7 Rda8 22. Bxa5 Rxa5 23. Rb2 h5 24. e3 Nd7 25. Rd1 Nc5 26. Rd4 Nd3 27. Rb8+ Kh7 28. Rb7 Bf6 29. Rxf7 Bxd4 30. exd4 Rxa2 31. Bxe6

[Assistant] Rc2


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

[User] 1. d4 c5 2. c4 cxd4 3. Nf3 Nc6 4. Nxd4 Nxd4 5. Qxd4 Nf6 6. Qd1 e6 7. g3 Bb4+ 8. Bd2 Bxd2+ 9. Qxd2 d5 10. cxd5 Nxd5 11. Bg2 Bd7 12. O-O Qb6 13. Nc3 Nxc3 14. Qxc3

[Assistant] Rd8


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

[User] 1. e4 c5 2. Ne2 Nc6 3. g3 Nf6 4. Bg2 e6 5. O-O Be7 6. c3 O-O 7. d4 cxd4 8. cxd4 d5 9. e5 Nd7 10. f4 f6 11. a3 Qb6 12. Kh1 fxe5 13. fxe5 Rxf1+ 14. Bxf1 Nf8 15. b4 Bd7 16. Qd3 Be8 17. Be3 Bg6 18. Qd2 Be4+ 19. Bg2 Bxg2+ 20. Kxg2 Ng6 21. h4 Rf8 22. h5 Nh8 23. Nf4 Nd8 24. Nc3 Nhf7 25. Na4 Qb5 26. Nc5 Ng5 27. Qc2 b6 28. a4 Qe8 29. Ncd3 Ne4 30. a5 Bg5 31. axb6 axb6 32. Ra6 Qb5 33. Ra7 Nc6 34. Qa4 Qxa4 35. Rxa4 Bxf4 36. gxf4 Kf7 37. Ra6 Rb8 38. b5 Nd8 39. Ra7+ Rb7 40. Ra8 Ke7 41. Kf3 Rc7 42. Nb4 Rc3 43. Ra7+ Kf8 44. Ra8 Ke8 45. Nc6 Nd2+ 46. Ke2 Nc4 47. Rxd8+ Kf7

[Assistant] Bf2


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

[User] 1. g3 g6 2. Bg2 Bg7 3. Nf3 Nf6 4. O-O O-O 5. d4 d6 6. c4 Nbd7 7. Nc3 Re8 8. d5 e6 9. dxe6 fxe6 10. c5 Nxc5 11. e3 e5 12. Qe2 Be6 13. Rd1 Qe7 14. Ng5

[Assistant] Bf7


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

[User] FEN: 8/8/7p/1p4p1/3N4/3n2P1/1pk1KPP1/1R6 b - - 3 44

[Assistant] Kxb1


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

[User] FEN: 1r1q1r2/4b1kp/3p2p1/1B1Qp3/4Pp2/2P2P2/1P4PP/R4RK1 b - - 0 25

[Assistant] Qb6+


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

[User] 1. d4 d5 2. Nf3 c6 3. Bg5 Nf6 4. e3 e6 5. Nbd2 Bd6 6. Bd3 Qe7 7. e4 dxe4 8. Bxf6 Qxf6 9. Nxe4 Qe7 10. Nxd6+ Qxd6 11. Qd2 Nd7 12. O-O-O Nf6 13. Kb1 O-O 14. Ne5 c5 15. f4 cxd4 16. g4 Nd5 17. Qf2 f6

[Assistant] Qh4


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

[User] FEN: r3r1k1/pq3ppp/2pQ4/3b2B1/8/1P6/P4PPP/R2R2K1 b - - 0 20

[Assistant] Re6


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

[User] 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nxc3 6. dxc3 Be7 7. Be3 Nd7

[Assistant] Qd2


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

[User] FEN: 2b5/8/1K1B2pp/P2p4/1pkP3P/6P1/8/8 b - - 1 52

[Assistant] b3


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

[User] FEN: 5r1k/6pp/2Q5/4P1r1/2P5/P4P2/1P1pq1PP/3R2RK b - - 6 31

[Assistant] Rxg2


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

[User] FEN: 2kr1bQ1/p1p4p/6p1/4Pb2/5P2/2Pq4/PP4PP/RNB1R2K b - - 2 20

[Assistant] Bc5


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

[User] FEN: 5r1k/6p1/4b2P/6QK/4p3/r7/7R/8 b - - 2 55

[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. g3 b6 2. Bg2 Nc6 3. b4 Bb7 4. a3 Rb8 5. Nf3 Ne5 6. O-O Nxf3+ 7. exf3 Ba6 8. Re1

[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 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Qa4+ Nd7 8. Nf3 O-O 9. Be2 c5 10. O-O b6 11. Bg5 Bb7 12. Bb5 Nf6 13. d5 Nxe4 14. Qxe4 f6 15. Bf4 Bxd5 16. Bc4 Bxc4 17. Qxc4+ Kh8 18. Qe6 Re8 19. Rad1 Qc8 20. Rfe1 Qxe6 21. Rxe6 Kg8 22. c4 Kf7 23. Rc6 e5 24. Rc7+ Re7 25. Rxe7+ Kxe7 26. Be3 h6 27. g4 f5 28. gxf5 gxf5 29. Nh4 Ke6 30. Rd5 Bf6 31. Ng2 f4 32. Bc1 Rg8 33. Kf1 h5 34. a4 h4 35. h3 Kf5 36. Bxf4 Ke4 37. Be3 Kf3 38. Ne1+ Ke4 39. Ke2 Kf5 40. Rd6 Rg1 41. Nf3 Rh1 42. Rxf6+ Kxf6 43. Bg5+ Kf5 44. Bxh4 Rxh3 45. Bg3 e4 46. Nh4+ Kg4

[Assistant] Ng6


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

[User] 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. Nf3 e4 5. Nd4 c5 6. Nc2 d4 7. d3 exd3 8. exd3 Bd6 9. O-O O-O 10. Re1 Nc6 11. Nba3 a6 12. Bg5 h6 13. Bd2 Bg4 14. Bf3 Bf5 15. Be2 Re8 16. Rb1 Qe7 17. b4 cxb4 18. Nb5 axb5 19. cxb5 Ne5 20. Nxb4 Bxb4 21. Bxb4 Qd7 22. a4 Bg4 23. f4 Bxe2 24. Qxe2 Neg4 25. Qg2 Ne3 26. Qf3 Qd5 27. Kf2 Qxf3+ 28. Kxf3 Rxa4 29. Bc5 Nfd5 30. Ra1 Rea8 31. Bxd4 Rxa1 32. Rxa1 Rxa1 33. Bxa1 Nc2 34. Bb2 f5 35. g4 g6 36. h4 h5

[Assistant] gxh5


[System] You are a chess 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/pb1r2k1/1p1p2P1/1Pp1pP2/2P5/1PPQ4/R6K/7R b - - 0 35

[Assistant] Qh8+


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

[User] 1. d4 d6 2. c4 Nf6 3. Nf3 g6 4. Nc3 Bg7 5. e4 O-O 6. Be2 Nc6 7. O-O e5 8. d5 Ne7 9. Ne1 c5 10. f4 exf4 11. Bxf4 Ne8 12. Nf3 Bg4 13. Rc1 Bxf3 14. Bxf3 a6 15. Re1 Be5 16. Qd2 Bxf4 17. Qxf4 f6 18. a4 Ng7 19. h4 Qb6 20. Re2 Rad8 21. h5 g5 22. Qg3 h6 23. Qh3 Qb4 24. Nd1 Qxa4 25. Ne3 f5 26. exf5 Nexf5

[Assistant] Nxf5


[System] You are a chess 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. Be3 e5 7. Qd2 c6 8. Nge2 Nbd7 9. O-O-O a6 10. Kb1 b5 11. cxb5 axb5 12. d5 cxd5 13. Nxd5 Nxd5 14. Qxd5 Qa5 15. Nc3 Rb8 16. Bxb5 Nb6 17. Bxb6 Be6 18. Bxa5 Bxd5 19. Rxd5 Ra8 20. Bb4 Rab8 21. a3 Bf6 22. Rhd1 Kg7 23. Be2 Rfc8 24. g4 Bg5 25. h4 Bf4 26. Ka2 Rb6 27. h5 gxh5 28. gxh5 h6 29. Rxd6 Rb7 30. Rd7 Rb6

[Assistant] Bf1


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

[User] FEN: 8/5k2/pp2p2p/2p1K2P/P1P5/1P6/8/8 w - - 5 45

[Assistant] a5


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

[User] 1. e4 c6 2. d4 d5 3. f3 dxe4 4. fxe4 e5 5. Nf3 Be6 6. dxe5 Qxd1+ 7. Kxd1 Nd7 8. c3 Ne7 9. Kc2 Ng6 10. Nbd2 Ndxe5 11. Nxe5 Nxe5 12. Nf3 Bd6 13. Bf4 f6 14. Bxe5 Bxe5 15. Nxe5 fxe5 16. Be2 Ke7 17. Rad1 Rad8 18. b3 Rxd1 19. Rxd1 Rf8 20. Rf1 Rf4

[Assistant] g3


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

[User] FEN: 1N6/3k1K1p/p7/2p1P3/8/1p6/8/8 b - - 1 43

[Assistant] Kc7


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

[User] 1. Nc3 d6 2. e4 c6 3. d3 Nd7 4. f4 Qc7 5. Nf3 f5 6. Ne2 fxe4 7. dxe4 Ngf6 8. e5 dxe5 9. fxe5 Nxe5 10. Bf4 Nxf3+ 11. gxf3 e5 12. Bg3 Bd6 13. Qd3 Be6 14. O-O-O O-O-O 15. Nc3 Bb4 16. Qe3 Bd6 17. Ne4 Nxe4 18. fxe4 Rhe8 19. Bd3 h6 20. Rhe1 Qa5 21. Qd2 Qxa2 22. Qc3 Qa1+ 23. Kd2 Qa4 24. b3 Qb4 25. Qxb4 Bxb4+ 26. c3 Ba5 27. b4 Bb6 28. Ra1 Bd7 29. Bf2 Be6 30. Bxb6 axb6 31. Ra8+ Kc7 32. Rxd8 Bd7 33. Rf1 Rxd8

[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. Nf3 Nc6 2. d4 d5 3. c3 Bg4 4. Bf4 Nf6 5. Nbd2 e6 6. h3 Bd6 7. Bxd6 Bxf3 8. Bxc7

[Assistant] Qxc7


[System] You are a chess 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. Nf3 Nd7 5. g3 e5 6. Bg2 Ne7 7. O-O O-O 8. e4 exd4 9. Nxd4 Nc6 10. Be3 Nde5 11. b3 Ng4 12. Nxc6 Nxe3 13. Nxd8 Nxd1 14. Raxd1 Bxc3 15. Rd3 Bg7 16. e5 Rxd8 17. exd6 Rxd6 18. Rfd1 Rxd3 19. Rxd3 Bf5 20. Rd1 c6 21. h3 Bf6 22. g4 Be6 23. f4 Rd8 24. Re1 Bd4+ 25. Kh2 Bb6 26. Re2 Ba5 27. Kg3

[Assistant] Rd2


[System] You are a chess 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. d4 Nf6 4. Bf4 Bg4 5. Ne5 Bf5 6. e3 e6 7. Bd3 Bd6 8. Bxf5 exf5 9. Qd3 g6 10. O-O-O Qc7 11. f3 Nbd7 12. g4 fxg4 13. fxg4

[Assistant] O-O-O


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

[User] FEN: 4r1k1/1Qp2pp1/p1n2brp/8/3P4/P3BNPq/1P3P2/2R1R1K1 b - - 0 23

[Assistant] Rxg3+


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

[User] FEN: 1r3r1k/1R6/p3pq2/2p2p1P/8/2P3Q1/P4PP1/6K1 w - - 3 32

[Assistant] Rxb8


[System] You are a chess 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/p1q2pp1/bp2p1p1/2n1P1N1/2R4Q/8/PP1r1PPP/5RK1 w - - 0 22

[Assistant] Qh7+


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

[User] FEN: r3k2r/pppq1ppp/2n5/2bn4/3p4/P1N1PNPb/1P3PBP/R1BQ1RK1 w kq - 0 11

[Assistant] Bxh3


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

[User] FEN: 5rk1/3QRp1p/6p1/8/1p6/1Bn2P2/1KP3PP/6q1 b - - 15 42

[Assistant] Qb1#


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

[User] 1. Nf3 d5 2. g3 c6 3. c4 Nf6 4. Bg2 e6 5. O-O Nbd7 6. b3 Be7 7. Bb2 O-O 8. d3 b6 9. Nbd2 Bb7 10. a3 Rc8 11. Qc2 c5 12. e3 Qc7 13. Rfd1 Rfd8 14. Rac1 Nf8 15. h3 Ng6 16. Ne1 dxc4 17. bxc4 Bxg2 18. Kxg2 Qc6+ 19. Ndf3 Rd7

[Assistant] a4


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

[User] 1. e4 c5 2. Nf3 e6 3. c3 Nf6 4. e5

[Assistant] Nd5


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

[User] FEN: 3r1rk1/5pb1/pqb1pnpp/1pp1N3/4P2B/1NP4P/PP2QPP1/2RR2K1 w - - 6 22

[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] 1. Nf3 g6 2. Nc3 Bg7 3. d4 d6 4. e4 Nc6 5. h3 e5 6. d5 Nce7 7. Be3 f5 8. Ng5 Nf6 9. Ne6 Bxe6

[Assistant] dxe6


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

[User] 1. d4 c5 2. Nf3 cxd4 3. Nxd4 d5 4. Nb3 a5 5. c4 a4 6. Nd4 a3 7. Nxa3 e5 8. Ndb5 d4 9. e3 Nc6 10. exd4 exd4 11. Bd3 Nf6 12. O-O Be7 13. Re1 O-O

[Assistant] Bf4


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

[User] 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3

[Assistant] Nxe4


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

[User] FEN: 8/7k/4qbp1/p4p1p/P2N1P1P/2P1pBP1/1P1nQ1K1/8 b - - 9 39

[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] FEN: 8/1kp5/2b5/p7/Pb1Q4/1PqPPN2/3RKP2/8 b - - 0 39

[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: r4k2/ppq2pp1/2b5/2p1RpPQ/8/7R/PPP2P1P/6K1 b - - 0 24

[Assistant] Qxe5


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

[User] FEN: 8/6k1/1p2P1p1/p7/n5PP/4Pp2/5P2/5K2 w - - 0 44

[Assistant] h5


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

[User] FEN: 6k1/pp3p1b/2p2b1p/6p1/4B3/2N4P/PPP2PP1/4K3 b - - 1 26

[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. d4 d5 2. g3 Bf5 3. Bg2 e6 4. Nf3 h6 5. O-O Nf6 6. e3 Be7 7. b3 O-O 8. Bb2 c6

[Assistant] c4


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

[User] 1. Nf3 c5 2. g3 d5 3. Bg2 Nf6 4. O-O e6 5. c4 Be7 6. cxd5 exd5 7. d4 O-O 8. dxc5 Bxc5 9. Nc3 Be7 10. Bg5 Nc6 11. Nd4 Nxd4 12. Qxd4 Be6 13. Bxf6 Bxf6 14. Qf4 Bxc3 15. bxc3 Qf6 16. Qxf6 gxf6 17. e4 dxe4 18. Bxe4 f5 19. Bxb7 Rab8 20. Bf3 Rbc8 21. Rfe1 Rxc3 22. Re3 Rxe3 23. fxe3 Rd8 24. Rd1 Rc8 25. Be2

[Assistant] Rc2


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

[User] 1. e4 e5 2. d4 exd4 3. c3 d3 4. c4 Nc6 5. Bxd3 Bc5 6. Qe2 d6 7. f3 Be6 8. Nc3 Nge7 9. Be3 Nd4 10. Qd2 Nec6 11. Nge2 Nxe2 12. Nxe2 Bb4 13. Nc3 Qf6 14. O-O O-O 15. a3 Bc5 16. f4 Bxe3+ 17. Qxe3 Qd4 18. Rae1 a6 19. f5 Bd7 20. Nd5 Qxe3+ 21. Rxe3 Rac8 22. f6 g6 23. b4 Rfe8 24. h4 h5 25. Be2 Ne5 26. Ne7+ Rxe7 27. fxe7 Re8 28. Rc1 Rxe7 29. c5 dxc5 30. Rxc5 c6 31. Bf3 Bg4 32. Kf2 Bd7 33. Rc2 Be6 34. Rc1 Nc4 35. Rd3 Ne5 36. Rd2

[Assistant] Kf8


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

[User] 1. e3 e5 2. d4 exd4 3. exd4 d5 4. Be3 Nf6 5. Qd2

[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 c6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Nd7 5. Ng3 Ngf6 6. Nf3 g6 7. Bd3 Bg7 8. Bg5 O-O 9. Qd2 Qb6 10. c3 c5 11. O-O a6 12. Rfe1 e6 13. Rab1 Re8 14. Bh6 cxd4 15. Bxg7 dxc3 16. Qh6 Ng4 17. Qg5 Nxf2 18. Bd4 h6 19. Qxh6 Ng4 20. Qf4 e5 21. Qxg4 Nf6

[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. e4 c5 2. Nf3 e6 3. b3 d6 4. Bb2 e5 5. c3 g6 6. d4 exd4 7. cxd4 Bg7 8. Nc3 cxd4 9. Nxd4 a6 10. Qd2 Nf6 11. O-O-O O-O 12. Kb1 Re8 13. f3 Qa5 14. Nc2 Nc6 15. g4 Be6 16. h4 Rac8

[Assistant] h5


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

[User] FEN: 5r2/5pk1/3p1R1p/p2PpQ1P/P2qPB2/2p5/1rB3P1/7K b - - 0 38

[Assistant] exf4


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

[User] 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. Bg5

[Assistant] Be7


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

[User] 1. Nf3 Nf6 2. d4 g6 3. Bf4 Bg7 4. Qd2 O-O 5. Nc3 d6 6. O-O-O a6 7. Kb1 b5 8. a3 Bb7 9. d5 Nbd7 10. e4 c6 11. Be2 Rc8 12. dxc6 Bxc6 13. Bd3 Ng4 14. Nd5 Nge5 15. Nd4 Bxd5 16. exd5 Qb6 17. Be3 Qb7 18. Rhe1 Qxd5 19. f4 Nxd3

[Assistant] Qxd3


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

[User] FEN: 8/1P6/8/2K5/P7/8/5pk1/R3r3 b - - 0 53

[Assistant] Rxa1


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Bc4 Bg7 7. Bb3 O-O 8. f3 Nc6 9. Be3 Bd7 10. Qd2 Ne5 11. O-O Qa5 12. Kh1 Rfc8 13. Rad1 Rc5 14. Nde2 Nc4 15. Bxc4 Rxc4 16. Bg5 Rac8 17. Bxf6 Bxf6 18. Nd5 Qxd2 19. Nxf6+ Kg7 20. Rxd2 Kxf6 21. c3 b5 22. b3 R4c5 23. Kg1 a5 24. Kf2 Be6 25. Ke3 a4 26. b4 Rxc3+ 27. Nxc3 Rxc3+ 28. Kf2 Ra3 29. Rc1 Bc4 30. Rcc2 Ke5 31. g3 g5 32. h3 h5 33. Rxc4 bxc4 34. b5 c3 35. Rc2 Kd4 36. b6 Rb3 37. axb3 axb3 38. Rxc3 Kxc3 39. b7 b2

[Assistant] b8=Q


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

[User] FEN: 8/pp6/2pK4/8/P1PPk3/8/8/8 b - - 0 38

[Assistant] Kxd4


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

[User] FEN: r5k1/1p1r1pp1/p3pnp1/2qN4/8/1Q5P/PP3PP1/3RR1K1 w - - 0 25

[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 Nc6 2. c3 d5 3. Nf3 e5 4. g3 exd4 5. cxd4 Nf6 6. Bg2 Be7 7. O-O O-O 8. Nc3 Bf5 9. Bf4 Ne4 10. e3 Nxc3 11. bxc3 Nb8 12. Qb3 b6 13. c4 Be6 14. Ne5 c5 15. cxd5 Bf5 16. Nc6 Nxc6 17. dxc6 Rc8 18. c7 Qd7 19. dxc5 Be6 20. c6 Qd2 21. Qd1 Qa5 22. Qc2 g5 23. Bxg5 Qxg5 24. Rfd1 Bf6 25. f4 Qa5 26. e4

[Assistant] Bxa1


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

[User] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d3 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. Re1 Qc7 12. Nbd2 b4 13. Nf1 Nc6 14. Ne3 bxc3 15. bxc3 Rb8 16. Bd2 Na5 17. Rb1 Be6 18. Rxb8 Rxb8 19. a4 Qb7 20. Qe2 Nc6 21. Nf5 Bxf5 22. exf5 Qb2 23. Rc1 Nd5

[Assistant] d4


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

[User] 1. g3 e6 2. Bg2 d5 3. c4 Nf6 4. cxd5 exd5 5. Nf3 c6 6. O-O Bd6 7. a3 O-O 8. b4 Bg4 9. Bb2 a5 10. d3 Nbd7 11. bxa5 Qxa5 12. Nbd2 Qc7 13. Qc2 Rfe8 14. Nb3 Bf5 15. a4 h6 16. Nfd4 Bg6 17. Rfc1 Ne5 18. Nb5 Qd7 19. Nxd6 Qxd6 20. Nc5 Re7 21. a5 Neg4 22. h3 Ne5 23. Qb3 Rb8 24. Ba3 Qc7 25. Rab1 Ree8 26. Nxb7 Ned7 27. a6 c5 28. Qb5 c4 29. Bd6 Qd8 30. Bxb8 Qxb8 31. Nc5 Nxc5 32. Qxb8 Rxb8 33. Rxb8+ Kh7 34. a7 cxd3 35. exd3 Nxd3 36. Rd1 Nb2 37. Rxb2 Be4 38. Bxe4+ dxe4 39. a8=Q Kg6 40. Rb6 h5 41. Rxf6+ gxf6 42. Qxe4+ f5 43. Rd6+ f6 44. Qe8+ Kg5

[Assistant] Qg8+


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

[User] 1. e3 c5 2. d4 d5 3. f4 Nc6 4. c3 Bf5 5. Bd3 Nh6 6. Qe2 Bxd3 7. Qxd3 e6 8. Nd2 Be7 9. Ne2 O-O 10. O-O f5 11. Nf3 Nf7 12. Ne5 Nd6 13. a3 Nxe5 14. fxe5 Ne4 15. Nf4 c4 16. Qe2 Qd7 17. Bd2 Bg5 18. Nh3 Bh6 19. g3 b5 20. Kg2 a5 21. Nf2 Nxf2 22. Rxf2 Rfb8 23. Raf1 g6 24. g4 b4 25. axb4 axb4 26. cxb4 Ra2 27. Bc3 Kh8 28. gxf5 gxf5 29. Qh5 Rg8+ 30. Kh3 Rg6 31. Rg2 Rxg2 32. Kxg2 Bg7 33. Rf3 Ra8 34. Rh3 h6 35. Kf3 Rg8 36. Rg3 Rf8 37. Rg6 Qf7 38. Rg5 Qxh5+ 39. Rxh5 Kh7 40. Rh3 Kg6 41. Rg3+ Kh7 42. Rg1 Rb8 43. Ra1 Bf8 44. Ra7+ Kg6 45. Ra6 Kf7 46. Ra7+ Kg6 47. Ra6 Kf7 48. Ra4 Be7 49. h3 Kg6 50. Ra6 Kf7 51. Ra7 Kf8 52. Ra6 Kf7 53. Ra4 Kg6 54. Kg3 Kf7

[Assistant] Kf3


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

[User] FEN: 8/7p/5p1k/Q7/1P2p3/3q3P/6P1/6K1 b - - 0 38

[Assistant] Qd4+


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

[User] 1. g3 b6 2. Bg2 Bb7 3. Bxb7 Nc6 4. Bxa8 Qxa8 5. Nf3 h5 6. d4 h4 7. d5 Nb4 8. Nc3 hxg3

[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] FEN: 2r2r2/pQp1k3/3p3p/5p2/2P5/4q1N1/PPP3PP/5R1K w - - 4 22

[Assistant] Qxc8


[System] You are a chess 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 a5 3. Nf3 a4 4. Nc3 a3 5. bxa3 e6 6. Bg2 Nf6 7. d4 d5 8. cxd5 exd5 9. dxc5 Bxc5 10. O-O Nc6 11. Na4 Be7 12. Qb3 Na5 13. Qd3

[Assistant] Nc6


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

[User] FEN: 3r3r/1k4pp/5p2/2bpp3/1P6/3P3P/P2B1PP1/RR4K1 b - - 0 22

[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. e4 c5 2. Nf3 e6 3. g3 Nc6 4. Bg2 g6 5. d3 Bg7 6. Nc3 Nge7 7. O-O O-O 8. Be3 d6 9. Qd2 Nd4 10. Bh6 Nec6 11. Rae1 Rb8 12. Nd1 b5 13. c3 Nxf3+ 14. Bxf3 b4 15. Bxg7 Kxg7 16. Ne3 Ba6 17. Ng4 g5 18. e5 d5 19. h4 h6 20. Kg2 Qe7 21. Rh1 Rh8 22. Nf6 Nxe5 23. Nh5+ Kg6 24. Rxe5 f6 25. Ree1 Qd6 26. hxg5 hxg5 27. g4 Rh6 28. Ng3 Rbh8 29. Rxh6+ Rxh6 30. Rh1 Rxh1 31. Kxh1 Qf4 32. Qxf4 gxf4 33. Ne2 Kg5 34. Nc1 bxc3 35. bxc3 c4 36. d4 Bb7 37. Kg2 e5 38. Ne2 e4 39. Ng1 exf3+ 40. Kxf3 f5 41. Nh3+ Kh4 42. Kxf4 fxg4 43. Ng5 Bc6 44. Nf7 Bb7 45. Ne5 Bc8 46. Ng6+ Kh3 47. Ne7 Be6 48. Nc6 Bf7 49. Nxa7 Kg2 50. Ke3 g3 51. fxg3

[Assistant] Kxg3


[System] You are a chess 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 f5 2. g4 fxg4 3. e4 d6 4. d4 e5 5. d5 Nf6 6. h3 gxh3 7. Bxh3 Nbd7 8. Nf3 Nc5 9. Ng5 h6 10. Bxc8 Qxc8 11. b4 hxg5 12. Rxh8 Ncxe4 13. Nxe4 Nxe4 14. Qh5+ Ke7 15. Bxg5+ Nxg5 16. Qxg5+ Kf7 17. O-O-O Qd8 18. Qf5+ Qf6 19. Qd7+ Qe7 20. Qxe7+ Kxe7 21. Rf1 a5 22. b5 b6 23. f4 exf4 24. Rxf4 Rd8 25. Kd1

[Assistant] Re8


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

[User] FEN: r2q1rk1/1bppnpbp/p7/1p3pN1/3nP3/1B6/PP4PP/RNBQ1RK1 w - - 0 13

[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: r5k1/pp2r1pp/2n1Nn2/q1p1p3/2Q5/1P5P/PBP2PP1/R4RK1 b - - 5 18

[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: 8/7p/p2k2p1/P7/3K2P1/8/7P/8 w - - 0 43

[Assistant] g5


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

[User] 1. d4 c5 2. d5 g6 3. c4 Bg7 4. Nc3

[Assistant] Bxc3+


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

[User] FEN: 5Q2/1q1k1p2/p3N1p1/4B1P1/P7/1P2p3/1KP5/3r4 b - - 0 43

[Assistant] Kxe6


[System] You are a chess 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 c5 4. Nf3 cxd4 5. Nxd4 Nc6 6. Nxc6 bxc6 7. g3 Rb8 8. Bg2 Qa5 9. O-O Nh6 10. Qc2 O-O 11. Bd2 Nf5 12. a3 Qa6 13. Nd1 Nd4 14. Qd3 Nb3

[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. e4 c5 2. b4 cxb4 3. a3 bxa3 4. Nxa3 Nc6 5. Nf3 d6 6. d4 Nf6 7. Bd3 e6 8. O-O Be7 9. c3 O-O 10. Qe2 e5 11. Bd2 Bg4 12. Nc2 Re8 13. h3 Bh5 14. g4 Bg6 15. g5 Nh5 16. h4 f6 17. Bb5 fxg5 18. d5 g4 19. Ng5 a6 20. 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. e4 e6 2. Nc3 d5 3. Nf3 Nf6 4. exd5 exd5 5. d4 Be7 6. Bd3 O-O 7. O-O c6 8. h3 Be6 9. Ne2 Nbd7 10. Nf4 Re8 11. Nxe6 fxe6 12. Re1 Nf8 13. Qe2 Bd6 14. Bg5 h6 15. Bh4 Be7 16. Ne5 N6d7 17. Bg3 Nxe5 18. Bxe5 Bf6 19. c4 Bxe5 20. Qxe5 Qf6 21. cxd5 Qxe5 22. Rxe5 exd5 23. Rae1 Rxe5 24. Rxe5 Kf7 25. Bf5 Re8 26. f4 Rxe5 27. fxe5 g6 28. Bg4 h5 29. Bc8 Ne6 30. Bxe6+ Kxe6 31. Kf2 b6 32. b4 a5 33. a3 axb4 34. axb4 c5 35. bxc5 bxc5 36. Ke3 c4 37. Kd2 Kf5 38. Kc3 Ke6 39. g4 hxg4 40. hxg4 g5 41. Kb4 Ke7 42. Kc3 Ke6 43. Kd2 Ke7 44. Kc3 Ke6 45. Kc2

[Assistant] Ke7


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

[User] FEN: 2k3rr/pppB2q1/5p2/1P1p3P/3P4/2P2Nb1/P1QN1P2/R1B3K1 b - - 0 20

[Assistant] Qxd7


[System] You are a chess grandmaster. 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. Qxd4 Nc6 4. Qa4 Nf6 5. Nf3 d6 6. Nd4 Bd7 7. Nc3 a6 8. f4 e6 9. Nxc6 Bxc6 10. Qd4 Qc7 11. a4 Be7 12. e5

[Assistant] dxe5


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

[User] 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O d6 5. d4 O-O 6. c4 Nc6 7. Nc3 e5 8. dxe5 Nxe5 9. b3 Nxf3+ 10. Bxf3 Ng4 11. Bb2 Qe7 12. e3 Ne5 13. Bg2 c6 14. h3 Be6 15. Kh2 Rfd8 16. Re1 h5 17. f4 Nd7

[Assistant] e4


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

[User] 1. g3 c6 2. Bg2 d5 3. Nf3 Nf6 4. e4 dxe4 5. Ng5 Bg4 6. f3 Bh5 7. g4 Bg6 8. fxe4 h6 9. e5 hxg5 10. exf6 exf6 11. d3 Bd6 12. Qe2+ Kd7 13. h3 Re8 14. Be4 f5 15. gxf5 Bxf5 16. Kf1 Bxe4 17. dxe4 Kc7 18. Nc3 Qf6+ 19. Qf2 Qxf2+ 20. Kxf2 Nd7 21. Kf3 Ne5+ 22. Kg2 f6 23. h4 gxh4 24. Rxh4 Nc4 25. b3 Nb6 26. Bf4 Be5 27. Bxe5+ Rxe5 28. Ne2 Rd8 29. Ng3 Rd2+ 30. Kf3 Rxc2 31. Rg4 Rc3+ 32. Kf4 g5+ 33. Rxg5 Rxg5 34. Ne2 Rc2 35. Nd4 Rf2+ 36. Ke3 Rfg2 37. Ne6+ Kd6 38. Nxg5 Rxg5 39. Rd1+ Ke6 40. Rh1 Nd7 41. Rh7 Re5 42. Kd4 a5 43. a4 b5 44. axb5 cxb5 45. Rh8 Nc5 46. Rb8 Rxe4+ 47. Kxc5 Rb4 48. Rxb5 Rxb5+ 49. Kxb5 f5 50. Kxa5 f4 51. Kb4 f3 52. Kc3 f2 53. Kb4 f1=Q 54. Ka5 Kd5

[Assistant] b4


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

[User] 1. b3 d5 2. Bb2 Bg4 3. Nf3 Bxf3 4. gxf3 Nf6 5. e3 Nc6 6. c4 dxc4 7. Bxc4 a6 8. Rg1 e6 9. Qc2

[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. d4 e6 2. e3 Nf6 3. Nf3 b6 4. Bd3 Bb7 5. Nbd2 c5 6. Qe2 cxd4 7. exd4 Nc6 8. c3 Be7 9. 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. d4 c6 2. c4 d5 3. cxd5 Nf6 4. Nc3 cxd5 5. Nf3 Bg4 6. Ne5 Bf5

[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] FEN: r5k1/5pp1/3p3p/5Q2/3P4/4PNqn/6P1/2R3K1 w - - 0 35

[Assistant] Qxh3


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

[User] FEN: 8/5p1k/p3bR2/1p1pP1QP/4n3/8/6PK/3q4 w - - 4 44

[Assistant] Rh6#


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

[User] 1. Nf3 f5 2. c4 Nf6 3. Nc3 g6 4. g3 Bg7 5. Bg2 O-O 6. O-O d6 7. d4 e5 8. dxe5 dxe5 9. Qxd8 Rxd8 10. Nxe5 Nbd7 11. Nxd7 Bxd7 12. Rd1 c6 13. Bf4 Be6 14. b3 Nh5 15. Rxd8+ Rxd8 16. Rc1 Nxf4 17. gxf4 Rd2 18. Bf3 Bxc3 19. Rxc3 Rxa2 20. Re3 Kf7 21. Kg2 a5 22. h4 Ra3 23. h5 a4

[Assistant] bxa4


[System] You are a chess 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 d6 5. d4 O-O 6. Be2 Nbd7 7. Be3 e5 8. O-O c6 9. d5 Ng4 10. Bg5 Qc7 11. Rc1 f5 12. exf5

[Assistant] gxf5


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

[User] 1. d4 g6 2. Nf3 Bg7 3. g3 d6 4. Bg2 Nd7 5. O-O Ngf6 6. c4 O-O 7. Nc3 c6 8. e4 Nb6 9. b3 Nfd7 10. Be3 a5 11. Rc1 a4 12. Qd2 axb3 13. axb3 c5 14. d5 Ne5

[Assistant] Nb5


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

[User] 1. d4 Nf6 2. Nc3 e6 3. Bg5 d5 4. Qd2 h6 5. Bf4 Bd6 6. f3 c5 7. dxc5 Bxf4 8. Qxf4 Bd7 9. O-O-O Na6 10. e4 dxe4 11. Bxa6 bxa6 12. fxe4 Rc8 13. e5 Nh7 14. Nf3 Rxc5 15. Qd4 Rc8 16. Qd6 Qe7 17. Ne4 Qxd6 18. Nxd6+ Ke7 19. Nxc8+ Rxc8 20. Rd6 Bc6 21. Rhd1 Ng5 22. Nxg5 hxg5 23. g3 g4 24. R1d4 f5 25. exf6+ gxf6 26. Rd2 Bd5 27. Rxa6 Rh8 28. Rxa7+ Kd6 29. b3 Ke5 30. c4 Be4 31. Ra5+ Bd5 32. cxd5 f5 33. dxe6+ Kxe6 34. Re2+ Kf6 35. Ree5 Rh5 36. Rxf5+ Rxf5 37. Rxf5+ Kxf5 38. a4 Ke4 39. a5 Kf3 40. a6 Kg2 41. a7 Kxh2 42. a8=Q Kxg3 43. Qh1 Kf2 44. Qh2+ Kf3 45. Qg1 g3 46. b4 Ke4 47. b5 Kd5 48. b6 Kc6 49. Qxg3 Kxb6 50. Qd6+ Kb5 51. Kc2 Kc4 52. Qd7 Kc5 53. Kc3 Kb6 54. Qc8 Kb5 55. Kd4 Kb4 56. Qc4+ Ka5 57. Qb3 Ka6 58. Kc5 Ka7 59. Qb6+ Ka8

[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] FEN: r1r3k1/5bpp/p3pp2/2b5/1p6/1P2PNB1/1PR3PP/1NR3K1 b - - 0 22

[Assistant] Bxe3+


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

[User] 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 dxe5

[Assistant] Nxe5


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

[User] FEN: 7k/p1p2p1p/1p6/8/1P5P/P1r3B1/6PK/8 w - - 1 37

[Assistant] Be5+


[System] You are a chess 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/pQ5p/6p1/2rp4/3q4/P5P1/KP5P/5R2 b - - 0 29

[Assistant] Qc4+


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

[User] 1. d4 e6 2. c4 f5 3. Nc3 Nf6 4. Bg5 Bb4 5. Qb3 Nc6 6. Nf3 O-O 7. e3 d6 8. Bd3 Kh8 9. O-O a5 10. e4 Bxc3 11. Qxc3 fxe4 12. Bxf6 Qxf6 13. Bxe4 Bd7 14. Rad1 Rae8 15. Rfe1 b6 16. Qe3 Nd8 17. Bc2 Nf7 18. Qe4 Qh6 19. a3 Nd8 20. b4 axb4 21. axb4 Bc6 22. Qe3 Bxf3 23. Qxh6 gxh6 24. gxf3 Rxf3 25. Re3 Rf6 26. Rde1 Kg7 27. Ba4 Rg8 28. Rg3+ Kf8 29. Re4 Rg5 30. Kg2 Kg7 31. Be8 Rf8 32. Bd7 Rf6 33. h4 Rxg3+ 34. Kxg3 Kf7 35. Ba4 Ke7 36. Bd1 Nf7 37. Bh5 Nd8 38. b5 Nb7 39. Rg4 Kf8 40. Rf4 Rxf4 41. Kxf4 Ke7 42. Be2 Kf6 43. Ke4 Na5 44. f4 Nb3 45. d5 Nc5+ 46. Kd4 e5+ 47. fxe5+ dxe5+ 48. Ke3 Nd7 49. Bg4 Nc5 50. Bc8 Ke7 51. Bh3 Kd6 52. Kf3 Nd7 53. Kg4 Nf6+ 54. Kf5 Nh5 55. Bf1 Ng3+ 56. Kf6 Nxf1 57. Kg7 e4 58. Kxh6 e3 59. Kxh7 e2 60. h5 e1=Q 61. h6 Qe4+ 62. Kg8 Qxc4 63. h7

[Assistant] Qxd5+


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

[User] FEN: 8/5kp1/4p2p/4K2P/6P1/5P2/8/8 w - - 5 57

[Assistant] Kd6


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

[User] FEN: 1r2r1k1/2q2pbp/2p5/p1Np1Q2/3P4/8/PP4PP/R4R1K w - - 1 26

[Assistant] Na6


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

[User] FEN: 3r2k1/1q3ppp/pp6/2prQ3/P4P2/7P/1P3nPB/4RBK1 w - - 0 30

[Assistant] Qe8+


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

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O d5 7. e5 Nfd7 8. f4 Nc6 9. Nxc6 bxc6 10. Kh1 c5 11. Nc3 c4 12. Be2 Rb8 13. Be3 Rxb2 14. Bd4 Rb8 15. f5 Bc5

[Assistant] fxe6


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

[User] 1. e4 e6 2. Nf3 d5 3. Nc3 Nf6 4. e5 Nfd7 5. d4 c5 6. dxc5 Nc6 7. Bf4

[Assistant] Bxc5


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

[User] 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 O-O 5. Nf3 c6 6. e4 d6 7. h3 Nbd7 8. d4 e5 9. O-O Re8 10. Be3 a5 11. Qc2 Qc7 12. Rad1 Nf8 13. Rfe1 h6 14. d5 c5 15. Nh2 Bd7 16. Bf3 Kh7 17. Ng4 Nxg4 18. Bxg4 a4 19. Kg2 Reb8 20. Bxd7 Qxd7 21. h4 f5 22. h5 f4 23. hxg6+ Nxg6 24. Bc1 Rf8 25. Rh1 Qg4 26. Rdf1 Rf7 27. Qd1 Qg5 28. Qh5 Qxh5 29. Rxh5 Raf8 30. f3 fxg3 31. Kxg3 Nf4 32. Rh4 Bf6 33. Rh2 a3 34. bxa3 Bg5 35. Ne2 Nxe2+ 36. Rxe2 Bxc1 37. Rxc1 Rxf3+ 38. Kg2 R3f4 39. Rb1 R8f7 40. Rb3 Rg7+ 41. Rg3 Rgf7 42. a4 h5 43. a5 h4 44. Rb3 Kh6 45. Rb6 R7f6 46. Rxb7 Rg4+ 47. Kh2 Rg3 48. Rb3 Rg4 49. a6 Rf7 50. Ra3 Rgg7 51. Rg2 Rxg2+ 52. Kxg2 Ra7 53. Kh3 Kg5 54. Rf3 Rxa6 55. Rf5+ Kg6 56. Kxh4 Ra4 57. Rg5+ Kf6 58. Rh5

[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. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Nb3

[Assistant] a5


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

[User] 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O e6 5. d4 Be7 6. c4 O-O 7. Nc3 Ne4 8. Bd2 d6 9. Rc1

[Assistant] Nd7


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

[User] FEN: k2r2n1/ppQ3p1/4p1p1/1N1pPp2/5P1q/4P2r/PP4P1/2R2RK1 w - - 1 20

[Assistant] Qc8+


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

[User] 1. d4 d5 2. c4 c6 3. Nc3 dxc4 4. a4 e5 5. dxe5 Qxd1+ 6. Kxd1 Be6 7. e4 Nd7 8. f4 g6 9. Nf3 Bb4 10. Nd4 O-O-O 11. Nxe6 fxe6 12. Kc2 Bxc3 13. bxc3 Nc5 14. Bxc4 Nxe4 15. Bxe6+ Kc7 16. Re1 Nc5 17. Bc4 Nh6 18. Be3 Nd7 19. Bxa7 Rhf8 20. g3 Ra8 21. Bg1 Nf5 22. a5 b5 23. Be6 Ne7 24. Red1 Rfd8

[Assistant] Rxd7+


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

[User] 1. e3 c6 2. d4 d6 3. f4 g6 4. Nf3 Bg7 5. g3 Nf6 6. Bg2 O-O 7. O-O Bg4 8. c3 Bxf3 9. Qxf3 Nbd7 10. Nd2 e6 11. e4 d5 12. e5 Ne8 13. g4 f5 14. g5 c5 15. h4 cxd4 16. cxd4 Nc7 17. Qf2 Rc8 18. Nf3 Nb5 19. Be3 a6 20. Rac1 Na7 21. h5 Rf7 22. hxg6 hxg6 23. Nh4 Nf8 24. Bf3 Rfc7 25. Kg2 Nb5 26. a4 Na7 27. Qe2 Nc6 28. b3 Nb4 29. Qd2 Rxc1 30. Rxc1 Rxc1 31. Qxc1 Qd7 32. Qc3 a5 33. Bd2 Qc6 34. Qxc6 Nxc6 35. Be2 Nxd4 36. Kf2 Nc6 37. Bb5 Kf7 38. Bxc6 bxc6 39. Bxa5 Nd7 40. Bb4 Bf8 41. Bxf8 Nxf8 42. b4 Ke7 43. Ke3 Kd7

[Assistant] Kd4


[System] You are a chess grandmaster. 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. g4 Nf6 5. g5 Ng8 6. Nge2 c6 7. Bg2 b5 8. e5 b4 9. Ne4 a5 10. exd6 exd6 11. h4 Bf5 12. N2g3 Ne7 13. h5 O-O 14. Nf6+ Bxf6 15. gxf6 Nd5 16. Nxf5 Qxf6 17. Nh6+ Kg7 18. Qd2 Re8+ 19. Kf1 Nd7 20. Ng4 Qf5 21. Qh6+ Kg8 22. hxg6 Qxg6 23. Qxg6+ fxg6 24. Bd2 N7f6 25. Nxf6+ Nxf6 26. Bxc6 Reb8 27. Bxa8 Rxa8 28. c4 bxc3 29. Bxc3 Ne4 30. Re1 d5 31. f3 Ng5 32. Kg2 Rf8 33. Re7 Rxf3 34. Rhxh7 Nxh7 35. Kxf3 Ng5+ 36. Kg4 Nf7 37. Rxf7 Kxf7 38. Bxa5 Ke6 39. Bc3 Kd6 40. a4 Kc6 41. a5 Kb5 42. Kg5 Ka6 43. Kxg6 Kb5 44. Kf5 Ka6 45. Ke5 Kb5 46. Kxd5 Ka6 47. Kc5 Kb7 48. d5 Kc8 49. d6 Kb7 50. a6+ Kxa6 51. d7 Kb7 52. d8=Q Ka7 53. Qc7+ Ka8 54. Qd7 Kb8 55. Kb6

[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] FEN: 8/1p6/p1n4p/8/4Q1Pk/4B3/8/q5K1 w - - 3 50

[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. f4 d6 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. d3 Nbd7 7. e4 e5 8. f5 c6 9. Qe2 Re8 10. h3 d5 11. g4 dxe4 12. dxe4 Nc5 13. Ne1 b6 14. Nd3 Ba6 15. Rd1 Nfxe4 16. Bxe4 Qd4+ 17. Qe3 Qxe4 18. Nxc5 Qxe3+ 19. Bxe3 bxc5 20. Bxc5 e4 21. Nc3 Rab8 22. Na4 e3 23. Re1 e2 24. Kf2 Bf6 25. Kg3 Rxb2 26. Nxb2 Bxb2 27. Rab1 Bc3 28. Bxa7 Bxe1+ 29. Rxe1 Bc4 30. fxg6 hxg6 31. a3 f5 32. gxf5 gxf5 33. Kf4 Kh7 34. Bc5 Rb8 35. Kxf5 Rb2 36. h4 Rxc2 37. Bb4 Rb2 38. Ke5 Rb3 39. Kd4 Rf3 40. Kxc4 Rf4+ 41. Kc5 Rxh4 42. Kxc6 Rh5 43. Rxe2 Rh6+ 44. Kb5 Rh5+

[Assistant] Bc5


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

[User] FEN: r3k2r/1b1n1p1p/p2p1q2/1p3P2/8/2NQ4/PPP4P/1K1R2R1 w kq - 1 21

[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: r4rk1/1b3pp1/pq2p2p/np2N3/5n2/2PQ2N1/PPB2bPP/3RR2K w - - 0 22

[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 c6 2. d4 d5 3. exd5 cxd5 4. Nf3 Nc6 5. c3 Bg4 6. h3 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. e4 e5 2. d4 d6 3. dxe5 Nc6 4. Nf3 Bg4 5. Be2 dxe5 6. Nxe5 Qxd1+ 7. Bxd1 Nxe5 8. Bxg4 Nxg4

[Assistant] Bf4


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

[User] 1. d4 c5 2. Nf3 cxd4 3. Nxd4 e5 4. Nb3 Nc6 5. e4 Nf6 6. Nc3 Bb4 7. Bd3 d5 8. exd5 Nxd5 9. Bd2 Nxc3 10. bxc3 Be7 11. O-O O-O 12. Rb1 f5 13. Bc4+ Kh8 14. Be3 b6 15. Bd5 Bb7 16. c4 Rc8 17. Nc5

[Assistant] Bxc5


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

[User] 1. d4 Nf6 2. Bg5 Ne4 3. h4 h6 4. Bf4 d5 5. e3 c6 6. Nf3 Nd7 7. Nbd2 Ndf6 8. Nxe4 Nxe4 9. Bd3 Bf5 10. Nd2 Nxd2 11. Qxd2 Bxd3 12. Qxd3

[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] FEN: 8/8/6Np/1pkp3P/2p4r/2P1K3/8/8 w - - 6 53

[Assistant] Nxh4


[System] You are a chess 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/1b2Q1pp/pb3p2/1p6/1P2P3/PB3n2/5PKP/3RR3 b - - 1 25

[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: 2r3k1/2r1bbpp/3p1p2/1N2pP2/1qP1P3/1P3RP1/4B2P/2RQ2K1 b - - 0 26

[Assistant] Qxb5


[System] You are a chess 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. Bg5 O-O 5. Qd2 c5 6. d5 e5 7. e4 d6 8. Bd3 a5 9. Nge2 Na6 10. f3 Nb4 11. Bb1 b6 12. a3 Na6 13. g4 Nc7 14. Ng3 Ba6 15. Bd3 Rb8 16. a4 Bc8 17. h4 Nce8 18. h5 Qc7 19. O-O-O Bd7 20. b3 b5 21. cxb5 c4 22. Bxc4 Qc5 23. Be3 Qc7 24. g5

[Assistant] Nxh5


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

[User] 1. d4 d5 2. Nf3 e6 3. Bf4 Be7 4. e3 Nf6 5. c4 Bd6 6. Bxd6 Qxd6 7. Nc3 Qe7 8. c5 b6 9. b4 a5 10. Qa4+ Bd7 11. Bb5 Bxb5 12. Nxb5 O-O 13. Rc1 c6 14. Nc3 b5 15. Qb3 axb4 16. Qxb4 Na6 17. Qb2 b4 18. Ne2 Ne4 19. Ng3 Rfb8 20. Nxe4 dxe4 21. Ne5

[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. Nc3 Nf6 2. e4 e5 3. Nf3 Bb4 4. Bc4 O-O 5. d3 c6 6. a3 Bxc3+ 7. bxc3 d5 8. exd5 cxd5 9. Ba2 Re8 10. O-O Bg4 11. Bg5 h6 12. Bh4 Nc6 13. h3 Bh5 14. Re1 Qc7 15. Bg3 Rad8 16. Rb1 Qa5 17. Qd2 Qxa3 18. Bb3 e4 19. Nd4 Nxd4 20. cxd4 exd3 21. Qxd3 Bg6 22. Qb5 b6 23. Bc7 Rc8 24. Be5 Ne4 25. f3 Nc3 26. Qd7 Nxb1 27. Rxb1 Qe7 28. Qg4 Qe6 29. Qg3 f6 30. Bf4 Qf5 31. Rf1 Bf7 32. Kh2 Qg6 33. Qf2 h5 34. Bd2 h4 35. Be1 Qg3+ 36. Qxg3 hxg3+

[Assistant] Bxg3


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

[User] 1. c4 g6 2. d4 Bg7 3. e4 c5 4. Ne2 Nc6 5. d5 Nd4 6. Nxd4 cxd4 7. Bd3 e5 8. O-O

[Assistant] Nh6


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

[User] FEN: R7/8/8/3n1Bp1/3k2P1/1K2p3/p7/8 b - - 0 70

[Assistant] e2


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

[User] 1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bd7 5. Bd3 Bc6 6. Qe2 Nd7 7. Nf3 Ngf6 8. Neg5 Bxf3 9. Nxf3 c6 10. Bd2 Be7 11. O-O-O Qb6 12. Rhe1 O-O-O

[Assistant] c4


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

[User] FEN: r2q4/5p1k/p2p1P1p/2p1r3/1p1nPp2/2b1B1Q1/P5PP/3B1RK1 w - - 0 24

[Assistant] Qg7#


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

[User] 1. d4 d5 2. c4 Nf6 3. Nc3 e6 4. f3 Be7 5. e3 c5 6. Bd3 cxd4 7. exd4 Nc6 8. c5 Nxd4 9. Qa4+ Nc6 10. Bb5 Bd7 11. Nge2 Bxc5 12. Bg5 h6 13. Bh4

[Assistant] g5


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

[User] 1. e4 d5 2. exd5 Qxd5 3. Nf3 Nf6 4. Be2

[Assistant] c5


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

[User] 1. d4 d5 2. Bg5 e6 3. Bxd8 Kxd8 4. e3 Ke8 5. c4 Nf6 6. cxd5 Be7 7. dxe6

[Assistant] Bxe6


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

[User] 1. b3 c6 2. Bb2 d5 3. e3 Nf6 4. Nf3 g6 5. Be2 Bg7 6. O-O O-O 7. Qc1 Nbd7 8. Na3 Re8 9. c4 e5 10. cxd5 cxd5 11. d4 e4 12. Ne5 Nxe5 13. dxe5 Nd7 14. f4 exf3 15. Bxf3 Nxe5 16. Bxe5 Bxe5 17. Rb1 Bf5 18. Rb2 Bxb2 19. Qxb2 Rxe3 20. Nb5 a6 21. Nd4 Bd3 22. Rd1 Bb5 23. Kh1 Qe7 24. h3 Re1+ 25. Rxe1 Qxe1+ 26. Kh2 Qe5+ 27. Kh1 Re8 28. a4 Bc6

[Assistant] b4


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

[User] 1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. Be3 Nc6 5. d5 Nd4 6. Nf3 Nxf3+ 7. gxf3 d6 8. Qd2 a6 9. h4 b5 10. h5 b4 11. Nd1 Bd7 12. Bc4 Bb5 13. Bxb5+ axb5 14. f4 Nf6 15. f3 Nxh5 16. e5 Ng3 17. Rg1 Nf5 18. Bf2 dxe5 19. Bxc5 exf4 20. Qxf4 Bh6 21. Qe5 f6 22. Qe6 Qc8 23. Nf2 Qxc5 24. Qc6+ Qxc6 25. dxc6 Rc8 26. a3 bxa3 27. Rxa3

[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. g3 g6 2. Bg2 Bg7 3. Nf3 Nf6 4. O-O O-O 5. d3 d5 6. Nc3 c5 7. e4 Nc6 8. e5 Ng4 9. d4 cxd4 10. Nxd4 Ngxe5 11. Nxc6 bxc6 12. Bf4 Nc4 13. b3 Nd6 14. Ne2 e5 15. Be3 Nf5 16. Bd2 Be6 17. c4 Rc8 18. cxd5 cxd5 19. Rc1 Rxc1 20. Qxc1 d4 21. Bg5 f6 22. Bd2 Bd5 23. f4 Bxg2 24. Kxg2 e4 25. g4 d3 26. gxf5 dxe2 27. Re1

[Assistant] gxf5


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

[User] 1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. Nf3 Nbd7 5. Bc4 Be7 6. dxe5 dxe5 7. Bxf7+ Kxf7 8. Ng5+ Kg6 9. Ne6 Qg8 10. Nxc7 Rb8 11. N7d5 Nxd5 12. Nxd5 Bc5 13. O-O Nf6 14. Be3 Nxd5 15. exd5 Bxe3 16. fxe3 Bf5 17. Qf3 Qf7 18. e4 Be6 19. Qg3+ Kh6 20. Rxf7 Bxf7

[Assistant] Qxe5


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

[User] 1. e4 e6 2. Nc3 d5 3. Nf3 Nf6 4. exd5 exd5 5. d4 Bd6 6. Bd3 O-O 7. O-O Re8 8. h3 c6 9. Bg5 Nbd7 10. Ne2 h6 11. Bh4 g5 12. Bg3 Bxg3 13. Nxg3 Ne4 14. Nf5 Qf6 15. Ne3 Qg6 16. c4 Ndf6 17. cxd5 cxd5 18. Ne5 Qg7

[Assistant] f3


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

[User] 1. e3 g6 2. c4 Bg7 3. Nc3 Bxc3 4. bxc3 Nf6 5. d4 O-O 6. Bd3 d6 7. e4 c5 8. f3 e5 9. Ne2 b6

[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: 6k1/8/2p5/p4Np1/Pp2Pp2/1P3P2/1b6/3K4 w - - 0 32

[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 Nc6 2. Nf3 d5 3. h3 Bf5 4. Bf4 e6 5. e3 Bd6 6. Bxd6 Qxd6 7. c3 Nf6 8. Bd3 Bxd3 9. Qxd3 e5 10. dxe5 Nxe5 11. Nxe5 Qxe5 12. Qb5+ Ke7 13. Nd2 b6 14. O-O-O Rhd8 15. Nf3 Qd6 16. Nd4 Kf8 17. Qc6 a6 18. Qxd6+ Rxd6 19. Nf5 Rd7 20. Ng3 Re8 21. Rd2 c6 22. Rhd1 Rde7 23. Kc2 Ne4 24. Nxe4 Rxe4 25. Rd4 f5 26. b3 Kf7 27. c4 Rxd4 28. Rxd4 dxc4 29. bxc4 c5 30. Rd5 g6 31. a4 Re6 32. Kc3 a5 33. Rd7+ Kf6 34. Rxh7 Rd6 35. Rb7 Ke5 36. f3 g5 37. Rg7 Kf6 38. Rg8 Rd1 39. Rb8 Rb1 40. f4 gxf4 41. exf4 Kg6 42. g4 fxg4 43. hxg4 Kf6 44. Rc8 Rf1 45. Rc6+ Kf7 46. f5

[Assistant] Rf3+


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

[User] 1. Nf3 e5 2. g3 d6 3. d3 Nc6 4. Bg2 h5 5. O-O h4 6. Nxh4 Rxh4 7. gxh4 Qxh4 8. Nd2 Nf6 9. Nf3 Qh7 10. Re1 Bg4 11. c3 O-O-O 12. Qa4 Bd7 13. Qa3 Kb8 14. Be3 d5 15. Nxe5 Bxa3 16. Nxc6+ Bxc6 17. bxa3 d4 18. cxd4 Bxg2 19. Kxg2 Qg6+ 20. Kh1 Ng4 21. Rg1 Qh5 22. Rg2 Nxe3 23. fxe3 g5 24. e4 f6 25. Rf1 Rd6 26. Rf5 Kc8 27. Kg1 Rxd4 28. h3 Rd6 29. Kh2 Qh4 30. Rgf2 Qh6 31. Kg2 Kd7 32. Kg3 Ke6 33. Kg2 Rd8 34. R5f3 Rh8 35. e3 Rh7 36. Kf1 Qh5 37. Ke2 Rh6 38. Kd2 g4 39. hxg4 Qxg4 40. Rf4 Qg5 41. d4 Qa5+ 42. Ke2 Qxa3 43. d5+ Ke7 44. Rg4 Qxa2+ 45. Kf3 Kf7 46. Rfg2 Qc4 47. Rg7+ Ke8 48. Rg8+ Kd7 49. R2g7+ Kd6 50. Rd8+ Kc5 51. Rxc7+ Kb4 52. Rxc4+ Kxc4 53. Rb8 b5 54. Rb7 a5 55. Rc7+ Kb4 56. d6 Rh7 57. d7 Rh8 58. Rc8 Rh3+ 59. Ke2 Rh2+ 60. Kd3 Rh1 61. d8=Q Rd1+ 62. Ke2 Rxd8 63. Rxd8 a4 64. Kd2 a3 65. Kc2 Ka4 66. Ra8+ Kb4 67. Kb1 Kb3 68. Rb8 b4 69. Rg8 a2+ 70. Ka1 Ka3 71. Rf8 b3 72. Rb8

[Assistant] b2+


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

[User] 1. e4 c5 2. d4 cxd4 3. c3 Nf6 4. e5 Nd5 5. Qxd4 e6 6. Nf3 Nc6 7. Qe4 d6 8. Bb5 Bd7 9. exd6 Bxd6 10. Nbd2 O-O 11. Nc4 Be7 12. 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] FEN: 8/2p5/p7/2bk4/2p2p2/5P2/P1PK1BP1/8 w - - 6 40

[Assistant] Bxc5


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

[User] 1. e4 c5 2. Nf3 a6 3. c3 e6 4. d4 d5 5. e5 Bd7 6. Bd3 cxd4 7. cxd4 Bb5 8. Bc2 a5 9. Nc3 Bc4 10. Ba4+ Nc6 11. b3 Ba6 12. Nb5 Nh6 13. Bxh6 gxh6 14. O-O Bxb5 15. Bxb5 Rg8

[Assistant] Rc1


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

[User] 1. e3 c5 2. d4 d5 3. Nf3 Nf6 4. c4 e6 5. Bd3 cxd4 6. exd4 Nc6 7. Nc3 Bd6 8. h3 O-O 9. O-O Re8 10. Re1 a6 11. Bg5 h6 12. Be3 Qc7 13. Rc1 b6 14. Qd2 Bb7 15. Bxh6 gxh6 16. Qxh6 dxc4 17. Bb1 e5 18. Qxf6 exd4 19. Qh6 Rxe1+ 20. Rxe1 f5 21. Qg6+ Kf8

[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] FEN: r5k1/4pp2/6p1/np2b2p/2p3bP/2Bq2P1/1PQ2P2/R3R1K1 w - - 2 24

[Assistant] Qxd3


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

[User] 1. d4 Nf6 2. Nf3 b6 3. Bg5 Bb7 4. Nbd2 d6 5. e3 Nbd7 6. Bd3 g6 7. c3 Bg7 8. O-O O-O

[Assistant] Rc1


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

[User] FEN: 5rk1/p2q1pp1/8/6pQ/1brp4/6P1/P4RBP/5RK1 w - - 2 33

[Assistant] Be4


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

[User] 1. d4 c5 2. d5 e5 3. Nc3 d6 4. e4 Nf6 5. Be2 Nbd7 6. Nf3 Be7 7. O-O O-O 8. Nd2 Ne8 9. Nc4 g6 10. a4 Ng7 11. Bh6 Bg5 12. Bxg5 Qxg5 13. g3 Qe7 14. f4 exf4 15. gxf4 f5 16. e5 dxe5 17. d6 Qe8 18. Qd5+ Qe6 19. Qxe6+ Nxe6 20. Nxe5 Rd8 21. Bc4 Nxe5 22. fxe5 Kg7 23. Nd5 Bd7 24. Nf6 Nd4 25. c3 Nc6 26. Rfe1 Na5 27. Bd5 Bc6 28. Bxc6 Nxc6

[Assistant] Rad1


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

[User] FEN: 6k1/4Qp1p/p1b3p1/5q2/2pB4/5P1P/6P1/6K1 w - - 4 34

[Assistant] Qd8+


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

[User] FEN: r4qk1/1b3p1p/p4Qp1/P7/3p4/5PNP/3B2P1/7K w - - 1 39

[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: 8/5R2/2r5/p4p1p/Pp3k1p/1P1R2n1/6PK/8 b - - 7 62

[Assistant] Rc1


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

[User] FEN: 6rr/1Q5p/3bkp2/3p4/3P1P2/2P1n2q/6P1/R3R1K1 w - - 6 31

[Assistant] f5+


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

[User] 1. d4 Nf6 2. Nf3 e6 3. Bg5 Be7 4. Bxf6 Bxf6 5. e3 d5 6. Nbd2

[Assistant] O-O


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

[User] 1. e4 Nf6 2. e5 Nd5 3. d4 Nb6 4. Nf3 d6 5. exd6 exd6 6. Bd3 Be7 7. c3 O-O 8. h3 N8d7 9. O-O Re8 10. Qc2 g6 11. Bh6 Bf8 12. Bxf8 Nxf8 13. Nbd2 Be6 14. Rae1 d5 15. Ne5 Nfd7 16. f4 Nxe5 17. fxe5 c5 18. Nf3 cxd4 19. cxd4 Rc8 20. Qf2 Nc4 21. b3 Nb6 22. Qg3 Nd7 23. Ng5

[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. c4 Nf6 2. d4 d6 3. Nf3 g6 4. e3 Bg7 5. Bd3 O-O 6. Nc3 Re8 7. Be2

[Assistant] Nc6


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

[User] 1. d4 g6 2. c4 Bg7 3. Nc3 e6 4. e3 Ne7 5. Nf3 O-O 6. Be2 d5 7. O-O dxc4 8. Bxc4 c5 9. Be2 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] 1. Nf3 Nf6 2. d4 d5 3. c4 g6 4. h4 c5 5. h5 cxd4 6. Nxd4 Nxh5 7. Rxh5 gxh5 8. e3 Nc6 9. Qxh5 Nxd4 10. exd4 Be6 11. Nc3 a6 12. Bf4 Qd7 13. cxd5 Bf5 14. Be2 Bg7 15. O-O-O Rc8 16. Bf3 Bg6 17. Qg4 Qxg4 18. Bxg4 Rc4 19. Be3 b5 20. a3 O-O 21. Kd2 Rd8 22. Be2 Rcc8 23. g4 e6 24. dxe6 fxe6 25. Ke1 Rd7 26. f4 Rcd8 27. d5 exd5 28. f5 Bf7 29. Bd4 Re8 30. Kf2 Rde7 31. Bf3 Bf8 32. g5 Re4 33. Bxe4 dxe4 34. Ke3 Bc4 35. Rg1 Kf7 36. Rh1 Kg8 37. Rh4 Bd3 38. Nxe4 Bb1 39. Kf3 Bxe4+ 40. Rxe4 Rd8 41. Kf4 Bd6+ 42. Kg4 Kf8 43. Bc3 Re8 44. Rxe8+ Kxe8

[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: 8/5p1p/5kp1/8/2q1P3/2p3PP/P1Q2P2/3K4 b - - 7 51

[Assistant] Qf1#


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

[User] 1. e4 d5 2. d4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. O-O O-O 8. Bg5 c5 9. d5 Nbd7 10. a4 h6 11. Bf4 g5 12. Bg3 Nb6 13. Ba2 Bf5 14. Qd2 e6 15. Rad1 exd5 16. Be5 c4 17. Nxg5 hxg5 18. Rxf5 Ne4 19. Nxe4 dxe4 20. Qe2 Qe7 21. Bxg7

[Assistant] Kxg7


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

[User] FEN: 7k/5p2/4p2p/8/3q4/Q5P1/5P1P/6K1 w - - 0 36

[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 g6 2. d4 Bg7 3. Nc3 c5 4. Nf3 cxd4 5. Nxd4 Nc6 6. Nb3 Nf6 7. Be2 d6 8. O-O O-O 9. Be3 a6 10. a4 Be6 11. f3 Na5 12. Nd5 Bxd5 13. exd5 Rc8 14. c3 Nc4 15. Bxc4 Rxc4 16. Qd3 Qc7 17. Na5 Rh4 18. b4 Rc8 19. c4 b6 20. Nc6 b5 21. axb5 axb5 22. cxb5 Rh5 23. Ra7 Rxd5 24. Rxc7 Rxc7

[Assistant] Qc4


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

[User] 1. d4 Nf6 2. b3 c5 3. Bb2 cxd4 4. Qxd4 g6 5. Qh4 Bg7 6. Nf3 d6 7. Nbd2 Nbd7 8. O-O-O O-O 9. e3 a5 10. Bd3 a4 11. Kb1 a3 12. Ba1 Nc5 13. Nc4 Nxd3 14. cxd3 Bf5 15. e4 Be6 16. Ng5 b5 17. Bxf6 h6 18. Bxg7 Kxg7 19. Nxe6+ fxe6 20. Ne3

[Assistant] d5


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

[User] 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 c5 8. Be3 O-O 9. Qd2 Qa5 10. Rb1 cxd4 11. cxd4 Qxd2+ 12. Kxd2 Rd8 13. h3 Nc6 14. d5 e6 15. Bc4 Na5 16. Bd3 exd5 17. exd5 Rxd5 18. Ke2 Rxd3 19. Kxd3 Bf5+ 20. Ke2 Bxb1 21. Rxb1 Rc8 22. Kd3 b6 23. Bd4 Nc6 24. Bxg7 Kxg7 25. a3 Kf6 26. Nd2 Ne5+ 27. Ke2 Rc2

[Assistant] Rb4


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

[User] FEN: 3r1r2/3R1Pkp/p4p2/3n4/8/8/P4PPP/4R1K1 w - - 2 28

[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] 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c5 6. Bxf6 gxf6 7. Nf3 Nc6 8. e3 cxd4 9. Nxd4 Bb4 10. Rc1 Qb6 11. Bb5 Bd7 12. O-O Bxc3 13. Rxc3 Nxd4 14. Bxd7+ Kxd7 15. exd4 Rac8 16. Qf3 Qd6 17. Rc5 Rxc5 18. dxc5 Qe5 19. b4 Re8 20. g3 f5 21. Rd1 Kc6 22. Qa3 a6 23. Qa4+ Kc7 24. Qa5+ Kb8 25. Qb6 Qe6 26. a4 Qxb6 27. cxb6 Rd8 28. Rd4 Rd6 29. a5 Kc8 30. Rf4 d4 31. Kf1 d3 32. Ke1 Rd5 33. Kd2 Kd7 34. Rc4 Rb5 35. Rc7+ Ke6 36. Rxb7 Rxb4 37. Ra7 Kd5 38. Kxd3 Rb3+ 39. Ke2 Ke4 40. Rxf7 Rb2+ 41. Kf1 h5 42. Kg2 Ke5 43. Ra7 Ke6 44. Rxa6 Ke5 45. Ra7 h4 46. b7 f4 47. gxf4+ Kxf4 48. h3 Ke4 49. a6 Kf4 50. Ra8 Ke4 51. b8=Q Rxb8 52. Rxb8 Kd3 53. a7 Ke2 54. a8=Q Ke1 55. Qe4+ Kd2

[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 d6 2. c4 e5 3. Nc3 f5 4. d3 Nf6 5. g3 Be7 6. Bg5 O-O 7. Bg2 c6 8. O-O Na6 9. Rb1 Nc7 10. b4 h6 11. Bxf6 Bxf6 12. Qc2 Bd7 13. a4 Rb8 14. a5 Qe7 15. b5 g5 16. a6 bxa6 17. bxc6 Bxc6 18. Nd2 Bxg2 19. Kxg2 Ne6 20. Nd5 Qf7 21. Nb3 f4 22. Nd2 Nd4 23. Qd1

[Assistant] Rxb1


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

[User] FEN: 4k3/2q2prp/B2R4/4p3/1p2b2P/8/PPP5/K2Q4 w - - 0 31

[Assistant] Bb5+


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

[User] 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 Bg4 6. h3 Bh5 7. g4 Bg6 8. Ne5 Nbd7 9. Nxg6 hxg6 10. Bg2 c6 11. Be3 e5 12. dxe5 Nxe5 13. Qxd6 Bxd6 14. O-O-O Bc7 15. Rhe1 O-O 16. b3 Rfd8 17. f4 Ned7 18. Kb2 Nb6 19. a4 a6 20. Rxd8+ Rxd8 21. Bc1 Rd7 22. Bf3 Kf8 23. h4 Nfd5 24. Nxd5 Nxd5 25. Rd1 Ke7 26. Bxd5 cxd5 27. Re1+ Kd6 28. c3 Kc6

[Assistant] Kc2


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

[User] FEN: r2q1bkr/pppb2pp/2n2n2/8/4NB2/5Q2/PPP2PPP/R3R1K1 w - - 8 15

[Assistant] Qb3+


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

[User] 1. e4 c5 2. d4 cxd4 3. c3 Nf6 4. e5 Nd5 5. Nf3 d6 6. Qxd4 e6 7. Nbd2 Nc6 8. Bb5 Bd7 9. Bxc6 Bxc6 10. Nc4

[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: 8/8/1R3pkp/6r1/3R1n2/6P1/5P1P/6K1 b - - 0 39

[Assistant] Ne2+


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

[User] FEN: 8/8/2Q4p/5qpk/8/8/P5P1/6K1 w - - 7 55

[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. e4 e6 2. Nc3 d5 3. exd5 exd5 4. d4 Nf6 5. Nf3 Bd6 6. Be2 c6 7. O-O Bg4 8. Ne5 Bxe2 9. Qxe2 O-O 10. f4 Rfe8 11. h3 Nbd7 12. Qf3

[Assistant] Qb6


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

[User] FEN: r3k2r/pppb1p2/3bq2p/1B1Np1p1/4Pp1P/1P4n1/PBPR2P1/R3Q1K1 w kq - 4 19

[Assistant] Nxc7+


[System] You are a chess 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. a3 g6 3. Nc3 Bg7 4. Rb1 Nc6 5. b4 b6 6. b5 Nb8 7. g3 Bb7 8. Nf3 Bxf3 9. exf3 d6 10. Bg2 Nd7 11. f4 Ngf6 12. Bxa8 Qxa8 13. O-O h5 14. h4 Ng4 15. d3 e5 16. Re1 O-O 17. Ne4 d5 18. Nd6 Qb8 19. f3 Nh6 20. fxe5 Nxe5 21. Bxh6 Bxh6

[Assistant] Rxe5


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

[User] 1. e4 d5 2. exd5 c6 3. Nf3 cxd5 4. Be2 Nc6 5. O-O e5 6. d4 e4 7. Ne5 Nxe5 8. dxe5 Bd7 9. Qxd5 Bc6 10. Qb3 Ne7 11. Rd1 Qc7 12. e6 fxe6 13. Qxe6 Rd8 14. Rxd8+ Qxd8 15. Nc3 g6 16. Bc4 Qd7 17. Qf7+ Kd8

[Assistant] Be6


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

[User] 1. Nf3 Nc6 2. d4 d6 3. Bf4 g6 4. e3 Bg7 5. Be2 Nf6 6. h3 O-O 7. O-O h6 8. Bh2 Kh7 9. c4 e6 10. Nc3 Re8 11. d5 e5 12. dxc6 bxc6 13. e4 Nh5 14. Ne1 Nf4 15. Nd3 Ne6 16. Rc1 Rb8 17. b3 Qe7 18. Bg4 Nd4 19. Bxc8

[Assistant] Rbxc8


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

[User] 1. e4 c6 2. Qf3 d5 3. exd5 cxd5 4. d4 Nc6 5. c3 Nf6 6. h3 Qc7 7. g4 Nxd4 8. cxd4 Qxc1+ 9. Qd1 Qxd1+ 10. Kxd1 Ne4 11. Ke1 e6 12. Bg2 Bb4+ 13. Ke2 Bd7 14. Bxe4 dxe4 15. Nc3 f5 16. f4 Rc8 17. Rc1 Ke7 18. Ke3 Rhd8 19. Nge2 a6 20. a3

[Assistant] Ba5


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

[User] FEN: r4knr/pp1n1pb1/2pqP1pp/3p4/8/1B3Q1P/PP3PP1/R1B1R1K1 w - - 0 17

[Assistant] Qxf7#


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

[User] FEN: 2r2k2/pR4R1/1p2B2p/4P3/6Pn/2N5/Pr5P/7K b - - 0 26

[Assistant] Rb1+


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

[User] 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d3 e5 5. O-O Bd6 6. Re1

[Assistant] Nge7


[System] You are a chess 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/P3R1p1/7p/5N1P/5PK1/r2n4/8 b - - 2 43

[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. f4 d6 2. Nf3 e5 3. fxe5 Nc6 4. exd6 Bxd6 5. g3 Bg4 6. Bg2 Qd7 7. d4

[Assistant] Bxf3


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

[User] 1. e4 c6 2. Nf3 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Bc4 Bf5 7. d4 e6 8. Bd3 Bg6 9. c4 Nd7 10. Be3 Bd6 11. O-O Qc7 12. Bxg6 hxg6 13. h3 Bf4 14. d5 Bxe3

[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. e4 e6 2. Nc3 d5 3. exd5 exd5 4. Nf3 c6 5. d4 Nf6 6. Bd3 Bd6 7. h3 O-O 8. O-O Re8 9. Bg5 h6 10. Be3 Nbd7 11. Qd2 Qc7 12. Rae1 Ne4 13. Bxe4 dxe4 14. Nh4 Nf6 15. f4 exf3 16. Nxf3

[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] 1. e4 c5 2. Nc3 d6 3. Nf3 g6 4. d4 cxd4 5. Nxd4 Nc6 6. Be3 Bg7 7. Nxc6 bxc6 8. Bd4 e5 9. Be3 Be6 10. f4 exf4 11. Bxf4 Be5 12. Bg3 Bxg3+ 13. hxg3 Nf6 14. Bd3 Ng4 15. Qf3 Qb6 16. b3 Qe3+ 17. Qxe3 Nxe3 18. Kf2 Ng4+ 19. Kf3 Ne5+ 20. Ke3 O-O 21. Ne2 Rac8 22. Nd4 Rfe8 23. Nf3 Ng4+ 24. Kf4 d5 25. exd5 cxd5 26. Rae1 h5 27. Ng5 Kg7 28. Nxe6+ Rxe6 29. Rxe6 fxe6 30. Re1 Rf8+ 31. Kg5 Rf6 32. Rf1 e5 33. Rxf6 Nxf6 34. Bxg6 e4 35. Bxh5 Nxh5 36. Kxh5 e3

[Assistant] Kg4


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

[User] 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Bc4 g6 6. Nge2 c6 7. Bf4 Qb4 8. Bb3 Bg7 9. a3 Qa5

[Assistant] O-O


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

[User] 1. d4 d6 2. Nf3 Nd7 3. e3 c5 4. c4 cxd4 5. exd4 Ngf6 6. Nc3 g6 7. Be2 Bg7 8. O-O O-O 9. Re1 a6 10. Bf4 Rb8 11. a3 Nh5 12. Be3 Nhf6 13. h3 b6 14. Qd2 Bb7 15. b4 Re8 16. Rad1 e5 17. dxe5 Nxe5 18. Qxd6 Nxf3+ 19. Bxf3 Bxf3 20. Qxd8 Rexd8 21. Rxd8+ Rxd8 22. gxf3 Rd3 23. Ne4 Nxe4 24. fxe4 Rxa3 25. Bxb6 Ra4 26. Bc5 a5 27. bxa5 Rxc4 28. Bb6 Ra4 29. Rd1 Bc3 30. Rd8+ Kg7 31. Ra8 Kh6 32. a6 Kh5 33. Kg2 Ba5 34. Be3 Bc7 35. a7 f5 36. exf5 gxf5 37. Rc8 f4 38. Bc5 Rxa7 39. Bxa7 Be5 40. Kf3 Bg7

[Assistant] Rc5+


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

[User] FEN: N1bk3r/pp1p1ppp/8/4P3/1b6/q1B2Q2/P2K1PPP/R4B1R b - - 2 14

[Assistant] Qb2+


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

[User] FEN: 7R/pp2kpp1/1b2p3/7p/QP1pPBnq/P2P1B1P/3N1PP1/6K1 b - - 0 20

[Assistant] Qxf2+


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

[User] FEN: 1k1r3r/pp3ppp/4p3/P1b5/1nP5/BQ3BqP/5P2/1R3RK1 w - - 0 22

[Assistant] Bg2


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

[User] 1. c4 d5 2. Nf3 d4 3. b4 a5 4. d3 Nd7 5. b5 e5 6. a4 f6 7. g3 Nc5 8. Bg2 h5 9. h4 Bd6 10. Ba3 Ne7 11. Nbd2 Bf5 12. Bxc5 Bxc5 13. Nb3 Qd6 14. Nxc5 Qxc5 15. O-O O-O 16. Kh2 Be6 17. Qb3 Rad8 18. Qa3 Qxa3 19. Rxa3 c5 20. Nd2 b6 21. Ne4 Nf5 22. Ra2 Nd6 23. Nxd6 Rxd6 24. Bc6 f5 25. f3 Rfd8 26. Rg1 Kf7 27. Raa1 Kf6 28. Rg2 Bd7 29. Bxd7 R8xd7 30. Rag1 Re6 31. g4 fxg4 32. fxg4 e4 33. g5+ Kg6 34. Rf1 Rde7 35. Rff2 exd3 36. exd3 Re3 37. Rd2 Rf3 38. Rg3 Ree3 39. Rxf3 Rxf3 40. Kg2 Re3 41. Rf2 Rxd3 42. Rc2 Rc3 43. Kf2 Rxc2+ 44. Kf3 Rxc4 45. Ke4 Rxa4 46. Kd5 Rb4 47. Kc6 Rxb5 48. Kxb5 d3 49. Kc4 d2 50. Kb5 d1=Q 51. Kc6 Qg4 52. Kb7 Qxh4 53. Ka6 Qxg5 54. Kb5 Qf5 55. Kc6 Kg5 56. Kb7 Kg4

[Assistant] Ka6


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

[User] 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. g3 Bg7 8. Bg2 O-O 9. O-O a6 10. a4 Re8 11. Bf4 Nh5 12. Bg5 Bf6 13. Bc1 Nd7 14. Nd2 Ne5 15. h3 Bg7 16. Kh2 Bd7 17. f4 b5 18. axb5 axb5 19. Rxa8 Qxa8 20. Nce4 Nc4 21. Nxc4 bxc4 22. Nxd6 Rb8 23. Nxc4 Bb5 24. b3 Qa2 25. e4 Bxc4 26. bxc4 Qxc4 27. e5

[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. d4 d6 2. Nf3 g6 3. c3 h6 4. Bf4 Bg7 5. Bg3 Nf6 6. e3 Nh5 7. Bd3 Nxg3 8. hxg3 c5 9. Qc2 cxd4 10. exd4 Nc6 11. Nbd2 e5 12. dxe5 dxe5 13. O-O-O Be6 14. Bxg6 fxg6 15. Qxg6+ Bf7 16. Qxg7 Rg8 17. Qxh6 Qe7 18. Ne4 Rg6 19. Qh8+ Bg8 20. Nd6+ Rxd6 21. Rxd6 Qxd6 22. Qxg8+ Qf8 23. Qxf8+ Kxf8 24. Rh8+ Ke7 25. Rxa8

[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 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Bd3 Bg7 7. O-O Nc6 8. Nde2 O-O 9. Ng3 a6 10. h3 b5 11. Be3 Bb7 12. Nce2 Rc8 13. c3 Ne5 14. a4 Nxd3 15. Qxd3 Qd7 16. axb5 axb5 17. Ra5 Bc6 18. Rfa1 Ra8 19. Nd4 Rxa5 20. Rxa5 b4 21. Nxc6 Qxc6 22. cxb4 Rb8 23. b5 Qb7 24. Ra7 Qxb5 25. Qxb5 Rxb5 26. Ra8+ Bf8 27. Bh6 Nd7 28. Rd8 Rb7 29. b4 f6 30. Ne2 Kf7 31. Bxf8 Nxf8 32. Nc3 Rxb4 33. f3 Rb7 34. Nd5 e6 35. Ne3 Nd7 36. Ng4 h5 37. Nf2 Ne5 38. Rc8 Ke7 39. Kh2 d5 40. exd5 exd5 41. Rc5 Kd6 42. Rc1 Rb2 43. Nd1 Rd2

[Assistant] Kg3


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

[User] 1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. dxe5 dxe5 5. Qxd8+ Kxd8 6. Bc4 Be6 7. Bxe6 fxe6 8. f3 a6 9. Be3 Bd6 10. Nh3 Nbd7 11. Nf2 Ke7 12. Ke2 Rhf8 13. Rad1 Rad8 14. Nd3 Rf7 15. Na4 b6 16. a3 Nb8 17. b4 Nc6 18. c3 Nh5 19. g3 Rdf8 20. Rhf1 h6 21. Nab2 g5 22. Nc4

[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. d4 d5 2. c4 c6 3. Nc3 Nf6 4. cxd5 cxd5 5. Nf3 Nc6 6. Bf4 e6 7. e3 a6 8. h3 Bd6 9. Bxd6 Qxd6 10. Bd3 O-O 11. O-O Re8 12. Qe2 e5

[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: 7r/2qpkp1p/p1n1p1rQ/1p6/8/1BN4P/PPP2PP1/4RK2 w - - 1 21

[Assistant] Nd5+


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

[User] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. a4 Rb8 9. axb5 axb5 10. c3 O-O 11. h3 Bd7 12. d4 Qc8 13. Nbd2 h6 14. Nf1 Re8 15. Ng3 Bf8 16. Bd2 Ra8 17. Qe2 Na5 18. Bc2 Nc4 19. Rxa8 Qxa8 20. Bc1 Qa2 21. Bd3 exd4 22. cxd4 Qa7 23. b3 Na3 24. Bb2 b4 25. d5 Nxd5 26. Nh4 Nf4 27. Qf3 Nxd3 28. Qxd3 Qb7 29. Ngf5 Bxf5 30. Nxf5 f6 31. Re3 Qb5 32. Qd4 Nc2 33. Qd3 Qxd3 34. Rxd3 Rxe4 35. g4 g6 36. Nh4 Kf7 37. Nf3 Ne1 38. Nxe1 Rxe1+ 39. Kg2 Re4 40. Bd4 c5 41. Be3 Ke6 42. Rd1 d5 43. Ra1 d4 44. Ra6+ Kd5 45. Bd2

[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Nf3 Nf6 5. Be2 c6 6. O-O Bf5 7. d3

[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. d4 Nf6 3. e5 Ne4 4. Nf3 Ng5 5. Nxg5 e6 6. Nf3 Be7 7. Bd3 c5 8. c3 cxd4 9. cxd4 f6 10. Nc3 fxe5 11. Nxe5

[Assistant] Nc6


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

[User] FEN: 5r2/2Q2Bkp/1p4p1/p7/3q1P2/3n3P/4r1P1/1R3R1K w - - 3 34

[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] FEN: 3r2k1/5p1p/6p1/1R3q2/Q2bp3/3p4/P2B1PPP/3R1BK1 b - - 4 31

[Assistant] Qxf2+


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

[User] 1. e3 c5 2. c4 e6 3. Nf3 Nf6 4. d4 Be7 5. d5 d6 6. dxe6 fxe6 7. Nc3 O-O

[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 c5 2. c4 cxd4 3. Qxd4 Nc6 4. Qd1 Nf6 5. Nf3 g6 6. e3 Bg7 7. Be2 O-O 8. O-O d6 9. Nc3 Be6 10. Nd5 Bd7 11. Bd2 Rc8 12. Bc3 Nxd5 13. cxd5 Bxc3 14. bxc3 Na5 15. Qd2 Nc4 16. Bxc4 Rxc4 17. Nd4 Qc7 18. Rab1 b6 19. Rfc1 Rc8 20. Rb3 Ba4 21. Ra3 Qc5 22. Qb2 Qxd5

[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. d3 g6 2. Nf3 Bg7 3. Nc3 e5 4. e4 Nc6 5. Bg5 Nge7 6. h4 h6 7. Be3

[Assistant] d6


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

[User] 1. b3 d6 2. Bb2 e5 3. Nf3 a6 4. e3 c5 5. c4 Nc6 6. d4 e4 7. d5 exf3 8. dxc6 bxc6 9. Qxf3 Qc7 10. Bd3 Be6 11. Nc3 Ne7 12. Rd1 Ng6 13. Bb1 Be7 14. h4 O-O 15. h5 Ne5 16. Qg3 Kh8 17. Ne4 f5 18. f4 Ng4 19. Ng5 Bxg5

[Assistant] fxg5


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

[User] 1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. Nf3 Nc6 5. Be2 Bg4 6. c3 e6 7. h3 Bh5 8. Be3 Bd6 9. Nbd2 Bf4 10. Bxf4 Nxf4 11. Bf1 Qd5 12. g3 Bxf3 13. Qxf3 Qxf3 14. Nxf3 Nd5 15. Bg2 O-O 16. O-O Nf6 17. Rfe1 Rfd8 18. Ne5 Nxe5 19. Rxe5 Nd5 20. Bxd5 Rxd5 21. Rxd5 exd5 22. Re1 Kf8 23. Re5 Re8 24. Rxd5 Re7 25. Rd8+ Re8 26. Rxe8+ Kxe8 27. Kf1 Kd7 28. Ke2 Kd6 29. Kd3 f5 30. f4 g6 31. g4 Ke6 32. g5 Kd6 33. c4 Ke6 34. d5+ Kd6 35. Kd4 c5+ 36. dxc6 bxc6 37. b4 a6 38. a4 c5+ 39. Kc3 Kc6 40. bxc5 Kxc5 41. Kb3 Kd4 42. Kb4 Ke4 43. c5 Kd5 44. c6 Kxc6 45. Kc4 a5 46. h4 Kd6 47. Kb5 Kd5 48. Kxa5 Ke4 49. Kb6 Kxf4 50. a5

[Assistant] Kg3


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

[User] 1. d4 d5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. O-O O-O 6. c4 dxc4 7. Ne5 Nc6 8. Bxc6 bxc6 9. Nxc6 Qd7 10. Nxe7+ Qxe7 11. Na3 c5 12. Nxc4 Ba6 13. b3 Rfd8 14. Bb2 cxd4 15. Qd2 e5 16. Rfd1 Bxc4 17. bxc4 Rac8 18. Rac1 Qe6 19. Qb4 Qh3 20. f3 h5 21. c5 Rc6 22. Qe1

[Assistant] Nd5


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

[User] 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 c5 5. cxd5 Nxd5 6. Bg5 Qa5 7. Bd2 cxd4 8. Nxd4 Bb4 9. Nxd5 Bxd2+ 10. Qxd2 Qxd5 11. Rc1 Bd7 12. Nb3 Qxd2+ 13. Kxd2 Bc6 14. f3 O-O 15. e4

[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. d4 c5 2. d5 e6 3. c4 Nf6 4. Nc3 b5 5. dxe6 fxe6 6. Nxb5 d5 7. Bf4 Na6 8. Nf3 Be7 9. e3 O-O 10. Be2 Nh5 11. Be5 Nf6 12. O-O Qb6 13. h3 Bb7 14. b3 Rad8 15. Qc2 Nb4 16. Qb2 Nc6 17. Bc3 a6 18. Na3 Bd6 19. Nc2 Rfe8 20. Bxf6 gxf6 21. Qxf6 Qc7 22. Ng5 Rf8 23. Qxe6+ Kh8 24. cxd5

[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 e6 2. Nc3 d5 3. exd5 exd5 4. Nf3 c6 5. d4 Nf6 6. Bd3 Be7 7. O-O O-O

[Assistant] Re1


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

[User] 1. e4 c5 2. Nc3 e6 3. Nf3 d5 4. d4 cxd4 5. Qxd4 Nc6 6. Bb5 Bd7 7. Bxc6 Bxc6 8. exd5 exd5 9. O-O

[Assistant] Be7


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

[User] FEN: 8/4k3/4P1K1/p1p2P2/P2p4/3P4/2n5/8 w - - 0 44

[Assistant] f6+


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

[User] FEN: 8/8/4p3/1pR4p/1P1P3k/2P3r1/7K/8 w - - 0 48

[Assistant] Rxh5+


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

[User] 1. d4 Nf6 2. Nf3 c5 3. e3 e6 4. Nc3

[Assistant] a6