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

[User] 1. d4 e6 2. Nf3 d5 3. c4 c6 4. Nc3 f5 5. Bf4 Be7 6. e3 Nf6 7. h3 O-O 8. Rc1 Nbd7 9. Bd3 a6 10. a4 Ne4 11. O-O h6 12. Ne5 Nxe5 13. Bxe5 Bf6 14. Bxf6 Qxf6 15. f4 Bd7 16. c5 Be8 17. Nxe4 fxe4 18. Be2 Bg6 19. Kh2 Kh7 20. g3 Rae8 21. b4 Re7 22. Rb1 Be8 23. b5 axb5 24. axb5 Ref7 25. bxc6 Bxc6 26. Bb5 g5 27. Rg1 gxf4 28. gxf4 Rg7 29. Rxg7+ Qxg7 30. Bxc6 bxc6 31. Qg4 Rg8 32. Qxg7+ Rxg7 33. Rb8 Rc7 34. Re8 Kg6

[Assistant] Rxe6+


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

[User] 1. b4 g6 2. Bb2 Nf6 3. c4 Bg7

[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 d5 2. exd5 e6 3. dxe6 Bxe6 4. Nf3 Nf6 5. Be2 Nc6 6. O-O Be7 7. d4 O-O 8. c4 Bg4 9. d5 Bxf3 10. Bxf3 Ne5 11. Be2 Bd6 12. Nc3 Re8 13. Bg5 a6 14. Re1 h6 15. Bh4 Qd7 16. Bxf6 gxf6 17. Qd2 Kg7 18. Qd4 Qf5 19. Qe4 Qg5 20. h4 Qg6 21. Qxg6+ fxg6 22. Rad1 Bc5 23. Kf1 Bd6 24. Ne4 Be7 25. f4 Nd7 26. Bf3 f5 27. Nc3 Bxh4 28. Rxe8 Rxe8 29. Ne2 Nf6 30. g3 g5 31. gxh4 g4 32. Bg2 Nh5 33. d6 cxd6 34. Rxd6 Re3 35. Rd7+ Kf6 36. Rd6+ Ke7 37. Rb6 Rd3 38. Ke1 Ng3 39. Nxg3 Rxg3 40. Kf2 Rd3 41. Rxb7+ Kd6 42. Rb3 Rd2+ 43. Kf1 h5 44. Rb6+ Kc5 45. Rf6 Rxb2 46. Rxf5+ Kxc4 47. Rxh5

[Assistant] Rxa2


[System] You are a chess grandmaster. 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. exd5 exd5 4. c4 Nf6 5. cxd5 Nxd5 6. Nc3 Be6 7. Be2 Nc6 8. O-O Bd6

[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. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 O-O 5. Bg5 h6 6. Bh4 c5 7. e3 g5 8. Bg3 Ne4 9. Qc2 f5 10. Bd3 d5 11. h4 g4 12. Ne5 Nxg3 13. fxg3 dxc4

[Assistant] Bxc4


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

[User] 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. Bc4 Nf6 5. Nf3 a6 6. O-O b5 7. Be2

[Assistant] Bb7


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

[User] FEN: 4r1k1/pp3pp1/6np/3rp3/1P6/P3nNP1/1B3bNP/1R1R1K2 w - - 2 30

[Assistant] Nxe3


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

[User] FEN: rn1q1rk1/p3bp2/2p1p1p1/1p2P1BQ/2pPN2P/8/PPn2PP1/R4RK1 w - - 0 17

[Assistant] Qh6


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

[User] 1. d4 c6 2. c4 d5 3. Nf3 e6 4. e3 Nf6 5. Nbd2 Bb4 6. Qc2 Bxd2+ 7. Bxd2 Ne4 8. Ne5 f5 9. f3 Qh4+ 10. Ke2 Qf2+ 11. Kd3 Na6 12. fxe4 fxe4+ 13. Kc3 b5 14. cxb5 cxb5 15. Bxb5+ Ke7 16. Rhf1

[Assistant] Qh4


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

[User] 1. b4 e5 2. Bb2 f6 3. e4 Bxb4 4. Bc4 Ne7 5. Qh5+ Ng6 6. f4 exf4 7. Nf3 Qe7 8. Kd1 Nc6 9. a3 Bd6 10. Nc3 Ne5 11. Nd5 Qf8 12. Nxe5 fxe5 13. g3 c6 14. gxf4 cxd5 15. exd5 exf4 16. Qg5 Be7 17. Re1 Kd8 18. Qg2 d6 19. Bb5 f3 20. Qf1 Bg4 21. Kc1 a6 22. Ba4 f2 23. Re4 Bh3 24. Bd4 Bxf1 25. Kb2 Bb5 26. Bb6+ Kd7 27. Rc4 f1=Q 28. Rc7+ Ke8 29. Bxb5+ axb5 30. Rxf1 Qxf1 31. Rxb7 Rc8 32. c3 Qe2

[Assistant] Kb3


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

[User] 1. d4 Nc6 2. c4 d5 3. cxd5 Qxd5 4. e3 Qd8 5. Nc3 e5 6. Nf3 exd4 7. Nxd4 Nxd4 8. exd4 Nf6 9. Bc4 Be6 10. Bxe6 fxe6 11. O-O Bd6 12. Re1 Qd7 13. Qe2 O-O 14. Qxe6+ Qxe6 15. Rxe6 Rad8 16. h3 Bb4 17. Bg5 Rxd4 18. Bxf6 Rxf6 19. Rxf6 gxf6 20. Re1 Bxc3 21. bxc3 Rd3 22. Re8+ Kf7 23. Rb8 Rxc3 24. Rxb7 a5 25. Ra7 Rc5 26. a4 h5 27. h4 Ke7 28. Kh2 Kd7 29. g3 Kc6 30. Ra6+ Kd5 31. Rxf6 Rc4 32. Rf5+ Kd4 33. Rxh5 c5 34. Rf5 Rxa4 35. Rf4+

[Assistant] Kc3


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

[User] FEN: r3kb1r/1b1q2pp/pQ1p1p2/1ppPn3/P3P3/1BN1R3/1P3PPP/R1B3K1 b kq - 0 20

[Assistant] Be7


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

[User] 1. d4 c6 2. c4 d5 3. Nc3 Nf6 4. e4 Bf5 5. exf5 e6 6. fxe6 fxe6 7. Nf3 Bb4 8. Bd2 Bxc3 9. Bxc3 O-O 10. Bd3 Nbd7 11. Qc2 Re8 12. O-O h6 13. Rfe1 b5 14. c5 a5 15. a3 a4 16. Ne5 Nxe5 17. dxe5 Nd7 18. Bd4 Qe7 19. Bg6 Rf8 20. Re3 Qg5 21. Rg3 Qf4 22. Bh7+ Kh8 23. Qg6 Rf7 24. Be3 Qf5 25. Qxf5 exf5 26. e6 Re7 27. Bxf5 Nf6 28. Bd4 Rf8 29. Rg6 Ne8 30. Rxh6+ Kg8 31. Bh7+ Kh8 32. Rh3 Nf6 33. Bg6+ Kg8 34. Bf7+ Rfxf7

[Assistant] exf7+


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

[User] 1. f4 d5 2. Nf3 g6 3. g3 Bg7 4. Bg2 Nf6 5. O-O O-O 6. d3 c5 7. Nc3 d4 8. Ne4 Nd5 9. e3 Nxe3 10. Bxe3 dxe3 11. c3 Nd7 12. Qe2 Qb6 13. Rab1 Qa5 14. a3 b5 15. Qxe3 Bb7

[Assistant] Rfd1


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

[User] 1. d4 b6 2. Nf3 Bb7 3. g3 g6 4. Bg2 Bg7 5. O-O Bxf3 6. Bxf3 c6 7. c4

[Assistant] e6


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

[User] 1. d4 c5 2. c3 cxd4 3. cxd4 Nf6 4. e3 d6 5. Nf3 g6 6. Be2 Bg7 7. O-O O-O 8. Re1 Bg4 9. Nbd2 Bxf3 10. Nxf3 Nc6 11. Bf1 Rc8 12. b3

[Assistant] Nb4


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

[User] FEN: 3r2k1/2P2pp1/q7/8/4p3/1P2PQPp/P1R2P1P/4K3 b - - 2 29

[Assistant] Qa5+


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

[User] FEN: r3k3/ppp3pp/3p4/2bBp3/2K1P3/2N1qP1b/PBQ4P/R6R b q - 6 20

[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] FEN: 2rk4/5pp1/P3pq1p/3p4/Q2P4/4P3/P4PPP/2r2RK1 w - - 1 20

[Assistant] a7


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

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. g3 Bb4 7. Qd3 Nc6 8. Nxc6 dxc6 9. a3 Be7 10. Bg2 e5 11. O-O Nf6 12. h3 O-O 13. Bg5 Rd8 14. Qe3 Ne8 15. Bxe7 Qxe7 16. Rfd1 Be6 17. Na4 b5 18. Nc5 Qa7 19. b4 Bc4 20. Qc3 f6 21. a4

[Assistant] Qe7


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

[User] FEN: 7k/1bq3rp/p7/1p6/1bpBR2P/5PP1/P1r3B1/6K1 w - - 0 33

[Assistant] Re8+


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

[User] FEN: 8/4RP2/2k1p3/3pP3/1p1n4/8/r5rP/5R1K w - - 0 38

[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: r6k/pR5p/2p2N2/4n3/3p4/7P/3q2P1/4R2K w - - 1 33

[Assistant] Rxh7#


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

[User] FEN: 2r4k/1b1Q2p1/5p1p/p1Bp4/P2P4/2q3P1/5P1P/4R1K1 w - - 0 28

[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. Nf3 c6 2. c4 d5 3. d4 Nf6 4. e3 a6 5. Nc3 e6 6. h3 dxc4 7. Bxc4 b5 8. Bb3 c5 9. O-O Bb7 10. Qe2 Nc6 11. Rd1 cxd4 12. Nxd4 Nxd4 13. exd4 Be7 14. Bg5 O-O 15. Rac1 Re8 16. Bxf6 Bxf6 17. Ne4 Bxe4 18. Qxe4 Rc8 19. Rxc8 Qxc8 20. h4 g6 21. h5 Qd7 22. hxg6 hxg6 23. Rd3 Kg7

[Assistant] Rd1


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

[User] 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Bb4 7. a3 Bxc3+ 8. bxc3 O-O 9. cxd5 Nc6 10. dxc6 Qa5 11. Qc2 Ne4 12. Bd2 Nxd2 13. Kxd2 bxc6 14. Bd3 Rd8 15. Bxh7+ Kf8 16. Bd3 c5 17. Ke2 Bb7 18. Rab1 Bxf3+ 19. gxf3 cxd4 20. cxd4 Rac8 21. Qb3 Rxd4 22. Rhc1 Rcd8 23. Qc3 Qe5+ 24. Kf1 Qxh2 25. Qc5+ Kg8 26. Be4 Qh1+ 27. Ke2 Rd2+

[Assistant] Ke3


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

[User] FEN: r1b2rk1/pp3ppp/2n5/2b2q2/3p4/1Q3N2/PP1BPPPP/2R1KB1R w K - 8 14

[Assistant] g4


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

[User] FEN: 6k1/R4N1p/bp2p1p1/p3P3/P7/B4PK1/2r2b1P/8 w - - 7 35

[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. f4 d5 2. Nf3 Bf5 3. g3 e6 4. Bg2

[Assistant] h6


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

[User] 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Bd2 c6 6. Bc4 Bf5 7. Nf3 e6 8. Qe2 Nbd7 9. O-O-O Bb4 10. a3 Bxc3 11. Bxc3 Qc7 12. Ne5 Nxe5 13. Qxe5 Qxe5 14. dxe5 Nd5 15. Bd2 O-O-O 16. f3 h5 17. h4 b5 18. Bb3

[Assistant] Kb7


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

[User] FEN: rn3k1r/pp4bp/4Qnpq/3p4/8/2N2B1P/PPP2PP1/R5K1 w - - 1 18

[Assistant] Qd6+


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

[User] FEN: 1RRbk3/p6p/4p1p1/8/4P3/7P/3r2r1/3N1K2 w - - 4 30

[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 e5 2. e3 e4 3. c4 d5 4. cxd5 c6

[Assistant] Nc3


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

[User] 1. e4 c6 2. Nc3 d5 3. d3 d4 4. Nce2 c5 5. g3 Nc6 6. h3 e5 7. Bg2 Bd6 8. f4 Be6 9. f5 Bd7 10. Nf3 g6 11. O-O Nge7 12. g4 Qc7 13. Bg5 O-O-O 14. c3 Rhg8 15. 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. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. Bxc6 bxc6 5. b3 Ne7 6. Bb2 f6 7. e5 Ng6 8. h4 Be7 9. h5 Nxe5 10. Nxe5 fxe5 11. Bxe5 Bf6 12. d4 cxd4 13. Qxd4 Bxe5 14. Qxe5 Qf6 15. f4 O-O 16. O-O Ba6 17. Rf2 Qxe5 18. fxe5 Rxf2 19. Kxf2 Rf8+ 20. Ke3 Rf1 21. g4 h6 22. Kd2 Kf8 23. Kc3 Ke7 24. Kb2 Be2 25. a4

[Assistant] Bxg4


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

[User] 1. e4 c6 2. Nc3 d5 3. exd5 cxd5 4. d4 Nf6 5. Nf3 Nc6 6. h3 Bf5 7. a3 Bg6 8. Bd3 e6 9. Bxg6 hxg6 10. O-O Bd6 11. Re1 a6 12. Bg5 Qc7 13. Bxf6 gxf6 14. Nxd5 Qd8 15. Ne3 Ne7 16. c4 O-O 17. c5 Bc7 18. b4 Kg7 19. Ng4 Nc6 20. Qd2 Rh8 21. Rad1 Rh5 22. Re3 Qd7 23. Rd3 Rd8 24. d5 Rxd5 25. Rxd5 Qxd5 26. Qxd5 Rxd5 27. Re1 f5 28. Ne3 Rd3 29. Ra1 Ne5 30. Ne1 Rb3 31. N3c2 Nd3 32. Nxd3 Rxd3 33. Kf1 Be5 34. Ra2 Rc3 35. Ke2 Kf6 36. g3 g5 37. f3 Bxg3 38. a4 Be5 39. b5 Rxc5 40. bxa6 bxa6

[Assistant] Nb4


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

[User] FEN: r4rk1/1p3pbp/p1np1pp1/3B4/P3P3/2N2Q1P/1qP2PP1/R4RK1 w - - 0 15

[Assistant] Rfb1


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

[User] 1. d4 d6 2. c4 g6 3. f4 Nd7 4. Nf3 Bg7 5. e3 e5 6. fxe5 dxe5 7. Nc3 Ne7 8. d5 O-O 9. e4 h6 10. Bd3 f5 11. Be3 f4 12. Bf2 g5 13. h4 g4 14. Nd2 g3 15. Bg1 Nf6 16. Nf3 Ng4 17. Qe2 Bd7 18. O-O-O b6 19. Bc2 Qe8 20. Kb1 Nc8 21. c5 Rf7 22. c6 Bxc6 23. dxc6 Kh8 24. Bb3 Rf6 25. Bd5

[Assistant] Nd6


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

[User] 1. e4 b6 2. Nc3 Bb7 3. Nf3 e6 4. d4 Bb4 5. Bd3 Nf6 6. Qe2 d5 7. exd5 Qxd5 8. O-O Bxc3 9. bxc3 Qh5 10. Rfe1 Bxf3 11. Qxf3 Qxf3 12. gxf3 Nbd7 13. Bg5 h6 14. Bxf6 Nxf6 15. Kf1 Rad8 16. Be4 Nd5 17. Bxd5 Rxd5 18. Re5 Rxe5 19. dxe5 Ke7 20. Rd1 Rd8 21. Ke2 Rxd1 22. Kxd1 Kd7 23. Kd2 Kc6 24. Kd3 Kc5 25. f4 g6 26. c4 c6 27. a4 a6 28. c3 h5 29. h4 b5 30. cxb5 axb5 31. axb5 cxb5 32. f3 Kd5 33. Kd2 Kc4 34. Kc2 Kc5 35. Kd3 Kd5 36. Kd2 Kc4 37. Kc2 b4 38. cxb4 Kxb4 39. Kd3 Kb3 40. Kd4 Kc2

[Assistant] Kc5


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

[User] 1. Nf3 e6 2. g3 Ne7 3. Bg2 d6 4. O-O Nd7 5. d4 h6 6. e4 g6 7. e5 Bg7 8. exd6 cxd6 9. Nc3 a6 10. Ne4 Nf6 11. Nxf6+ Bxf6

[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: r5k1/1bq1rppp/p3p3/1p1N4/8/P2P1N1P/1PP1QPP1/R3K2R b KQ - 0 18

[Assistant] exd5


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

[User] 1. d4 c5 2. e4 cxd4 3. Qxd4 Nc6 4. Qd1 Nf6 5. Nc3 e6 6. Nf3 Bb4 7. Bg5

[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 Nf6 2. Nf3 d5 3. Nc3 c5 4. Bf4 a6 5. e3 Nc6 6. Bd3 Bg4 7. h3 Bh5 8. g4 Bg6 9. Ne5

[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: 3q1rk1/p1p2ppp/2pb1n2/6Bb/4N3/P4N1P/1rP2PP1/R2Q1RK1 w - - 0 15

[Assistant] Bxf6


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

[User] 1. c4 e5 2. b3 f5 3. Bb2 d6 4. g3 Nf6 5. Bg2 Be7 6. Nf3 c6 7. O-O O-O 8. d3 Be6 9. Nbd2 Nbd7 10. Ng5 Bf7 11. Nxf7 Rxf7 12. e3 Rc8 13. f4

[Assistant] Ng4


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

[User] 1. d3 Nc6 2. Nd2 g6 3. g3 Bg7 4. Bg2 f5 5. Ngf3 e5 6. O-O d6 7. e4 Nf6 8. exf5 gxf5 9. Re1 O-O 10. c3 Bd7 11. d4 exd4 12. Nxd4 Nxd4 13. cxd4 c6 14. Nb3 Re8 15. Bf4 Rxe1+ 16. Qxe1 Qf8 17. Rd1 Re8 18. Qd2 Ne4 19. Bxe4 fxe4 20. d5 c5 21. Nc1 Bg4 22. Re1 Qf5 23. Qe3 Bf3 24. Qxf3 exf3 25. Rxe8+ Kf7

[Assistant] Re3


[System] You are a chess grandmaster. 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. Nf3 Nf6 5. Bc4 c6 6. d3 Bf5 7. O-O e6 8. Re1 Qc7 9. Bg5 Bd6 10. Ne4 Nxe4 11. dxe4 Bg4 12. h3 Bh5 13. e5 Be7 14. Bf4 O-O 15. Bd3 Nd7 16. Qe2 Nc5 17. Bg3 Nxd3 18. Qxd3 Rfd8 19. Qc3 Qb6 20. a3 Bxf3 21. gxf3 Rd5 22. f4 Rad8 23. f5 exf5 24. Qf3 g6 25. c4 Rd3 26. Qe2 Rd2 27. Qf1 Bc5 28. b4

[Assistant] Bd4


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

[User] FEN: r1b2rk1/p1q1bpp1/1p1p3p/2p1pN2/4P1Q1/1P1P4/PBP2PPP/R4RK1 w - - 1 17

[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. c4 e6 2. g3 d5 3. Bg2 Nf6 4. Nf3 Be7 5. O-O O-O 6. b3 c6 7. Bb2 Nbd7 8. d3 b6 9. Nbd2 Bb7 10. Rc1 Re8 11. Rc2 Bf8 12. cxd5 e5 13. Qa1 cxd5 14. e4 d4 15. Nc4 b5 16. Ncd2 a6 17. Rfc1 Rc8 18. Qb1 Rxc2 19. Qxc2 h6 20. Qc7 Qb8 21. Qxb8 Rxb8 22. Nb1 Bd6 23. Bh3 Kf8 24. Bxd7 Nxd7 25. Ba3 Ke7 26. Bxd6+ Kxd6 27. Nbd2 f6 28. Kf1 Rc8 29. Rxc8 Bxc8 30. h3 Nb6 31. g4 g5 32. Ke2 a5 33. Ne1 Kc5 34. Nb1 Kb4 35. Nc2+ Kc5 36. a3 b4 37. a4 Bd7 38. Nd2 Nxa4 39. bxa4 Bxa4 40. Na1 Bb5 41. Ndb3+ Kb6 42. Kd2 a4 43. Nc1 Kc5 44. Kc2 Bd7 45. Ne2 Be6 46. Ng3 b3+ 47. Kb2 Kb4 48. Nxb3 Bxb3 49. Nh5 a3+ 50. Ka1 Kc3 51. Nxf6 Kxd3 52. Nd7 Ke2 53. Nxe5

[Assistant] d3


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

[User] 1. e4 c5 2. Nf3 Nc6 3. Nc3 Nf6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. h3 d6 8. d3 Rb8 9. Bg5 Bd7 10. Qd2 Re8 11. Kh2 b5 12. a3 a5 13. Ne2 b4 14. axb4 axb4 15. b3 Kh8 16. Bh6 Ng8 17. Bxg7+ Kxg7 18. h4 h6 19. Nf4 e5 20. Nd5 Nd4 21. Ra6 Bc8 22. Ra7 Rb7 23. Ra2 Be6 24. Ne3 Qb6 25. Nxd4 cxd4 26. Nc4 Bxc4 27. dxc4 Ree7 28. f4 Ra7 29. Rxa7 Rxa7 30. f5 Nf6 31. Bf3 d3 32. Qxd3 gxf5 33. exf5 Ra2 34. Qe2 Qd4 35. Re1 e4 36. Bg2 Qc3 37. Rc1 h5 38. Bxe4 Nxe4 39. Qxe4 Qd2+ 40. Kh3 Qxc1 41. f6+ Kxf6 42. Qf3+ Kg6 43. Qe4+

[Assistant] Kg7


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

[User] 1. e4 c6 2. Nc3 d5 3. d3 d4 4. Nce2 e5 5. f3 f6 6. f4 Nd7 7. Nf3 Bd6 8. g3 Ne7 9. Bg2 O-O 10. O-O exf4 11. gxf4 f5 12. e5 Bc7 13. Nfxd4 Nd5 14. Ne6 Qe7 15. Bxd5 cxd5 16. Nxc7 Qc5+ 17. d4 Qxc7 18. Nc3 Nb6 19. Qf3 Be6 20. b3 Rac8 21. Bb2 Nd7 22. Rac1 Qc6 23. Ne2 Nb6 24. a4 a6 25. h4 Nd7 26. Ng3 g6 27. h5 Kh8 28. Kg2 g5 29. fxg5 b5 30. a5 b4 31. Ne2 Rg8 32. Qe3 Rg7 33. Kh2 Rcg8 34. Rg1 Nf8 35. Nf4 Bf7 36. e6 Nxe6 37. Nxe6 Qxe6 38. Qxe6 Bxe6

[Assistant] Rce1


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

[User] 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 Bf5 5. cxd5 e6 6. dxe6 Bxe6 7. e4 Bb4 8. Bd3 Bxc3+ 9. bxc3 O-O 10. Bc2 Nbd7 11. O-O Nb6 12. Qd3 h6 13. e5 g6 14. exf6 Bf5 15. Qd2 Bxc2 16. Qxc2 Qxf6 17. Ne5 Nd5 18. Be3 Qe7 19. c4 Nf6 20. Bxh6 Rfe8 21. Bg5 Qe6 22. Bxf6 Qxf6 23. Qd2 Rxe5 24. dxe5 Qxe5 25. Qe3 Qf6 26. Rae1 Kg7 27. g3 Kh7 28. Qe5 Qg5 29. Qxg5 f6 30. Qh4+ Kg7

[Assistant] Re7+


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

[User] 1. d4 e6 2. Nf3 d5 3. Bg5 Nf6 4. Bf4 Nbd7 5. Bg3 Bd6 6. Bh4 e5 7. e3 e4 8. Nfd2 O-O 9. c4 c6 10. cxd5 cxd5 11. Nc3 Qa5 12. Bb5 Bb4 13. Bxd7 Bxd7 14. Bxf6 Bxc3 15. Rc1

[Assistant] Bxd2+


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

[User] 1. e4 e5 2. Nc3 Nf6 3. g3 Bc5 4. Bg2 d6 5. Nge2 Nc6 6. h3 a6 7. O-O Be6 8. Nd5 Qd7 9. Kh2 h5 10. Nxf6+ gxf6 11. c3 Ba7 12. d4 d5 13. dxe5 dxe4 14. Qxd7+ Bxd7 15. exf6 Bf5 16. Be3 O-O-O 17. Rad1 Rxd1 18. Rxd1 Bxe3 19. fxe3 Rh6 20. Nf4 Rxf6 21. Nxh5 Rh6 22. g4 Be6 23. Bxe4 Ne5 24. Kg3 Bxa2 25. Bf5+ Kb8 26. Kf4 Nc4 27. Rd8+ Ka7 28. b4 Nb6

[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. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. Nc3 Nb6 7. e3 O-O 8. Nf3 Nc6 9. O-O Re8 10. a3 a5 11. b3 a4 12. bxa4 e5 13. dxe5 Nxe5 14. Nxe5 Bxe5 15. Bb2 Nc4 16. Qc1 Nxb2 17. Qxb2 Qf6 18. Rac1 c6 19. Qb4 Qg7 20. Ne4 Be6 21. Nc5 Bd5 22. Bxd5 cxd5 23. Rfd1 b6 24. Nd7 Bb2 25. Rc2 Bf6 26. Nxb6 Rab8

[Assistant] a5


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

[User] FEN: r1b4r/ppN3pp/2nQ4/7k/2B5/2P1b1P1/PP5q/RN2K3 w Q - 4 17

[Assistant] g4+


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

[User] FEN: 6rk/pp1Q2bp/2p5/3pPr2/3P4/P1P1B3/BP4K1/RN6 b - - 0 34

[Assistant] Bxe5+


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

[User] FEN: 8/4r2p/7K/4k1P1/8/7P/4p3/4R3 b - - 3 46

[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] 1. d4 c6 2. c4 d5 3. cxd5 cxd5 4. Nc3 Nf6 5. Nf3 Nc6 6. Bf4 e6 7. e3 a6 8. Bd3 Bd6 9. Bxd6 Qxd6 10. O-O b5 11. a3 Bb7 12. Rc1 O-O

[Assistant] Ne2


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

[User] FEN: 1r1r4/5k1N/2p3qQ/p7/2p2p2/P7/1P2RK2/8 w - - 2 46

[Assistant] Ng5+


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

[User] 1. e4 d5 2. e5 c5 3. Nf3 Nc6 4. c3 Bf5 5. d4 e6 6. Be2 Qb6 7. O-O Nge7 8. dxc5 Qxc5 9. Nbd2 Bg4 10. Nb3 Qb6 11. Bf4

[Assistant] Ng6


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

[User] FEN: r1b2r1k/bpp2N2/5qBp/Q6n/P2P4/2P5/1P3nPP/RNB2RK1 b - - 1 19

[Assistant] Rxf7


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

[User] 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 c6 5. Bd3 Bd6 6. Nge2 Ne7 7. Be3 Bf5 8. f3 Qc7 9. g4 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 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O a6 10. a4 Bg4 11. Qc2 Nbd7 12. h3 Bxf3 13. Bxf3 Re8 14. Re1 Rb8 15. Be2 Qc7 16. f4 c4 17. Be3 b5 18. axb5 axb5 19. Bf3 b4 20. Ne2 Rb7 21. Rac1 Nxd5 22. Bf2 N5b6 23. e5 d5 24. Kh2 Nc5 25. Red1 Nd3 26. Rxd3 cxd3 27. Qxc7 Rxc7 28. Rxc7 dxe2 29. Bxe2 Rxe5 30. Bxb6 Rxe2 31. Rc8+ Bf8 32. Bc5 Kg7 33. Bxf8+ Kf6 34. Bxb4 Kf5 35. Bc3 Kxf4 36. Rd8 f5 37. Rxd5 Rc2 38. Rd4+ Ke3 39. Kg3 g5 40. Rd8 f4+

[Assistant] Kh2


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

[User] FEN: 5rk1/pb4p1/1p2pq2/3rN1Rp/2BP1n1P/8/PP3PP1/R2Q2K1 b - - 4 27

[Assistant] Nh3+


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

[User] FEN: 2r2rk1/3q1ppp/3p1b2/3P4/3B2n1/5R1P/PPNQ2P1/R5K1 b - - 0 20

[Assistant] Rxc2


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

[User] 1. e4 c5 2. Nf3 e6 3. Nc3 Nc6 4. g3 Be7 5. Bg2 Nf6 6. O-O d5 7. d3 d4 8. Ne2 Nd7 9. Nf4 e5 10. Nd5 f6 11. Nxe7 Qxe7 12. Nh4 Nb6 13. Qh5+ Qf7 14. Qxf7+ Kxf7

[Assistant] f4


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

[User] FEN: 8/8/3k1p2/3p1p1p/7P/3KP1P1/5P2/8 w - - 9 56

[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. d4 g6 2. c4 Bg7 3. Nc3 d6 4. d5 c6 5. e4 Nd7 6. Nf3 Ngf6 7. Bd3 O-O 8. h3 Nc5 9. Bc2 Qb6 10. Rb1 a5 11. b3 Nh5 12. Bd2 e6 13. O-O exd5 14. cxd5 a4 15. b4 Nd7 16. dxc6 bxc6 17. b5 c5 18. Nd5 Qd8 19. b6

[Assistant] Bb7


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

[User] 1. g3 h5 2. h4 d5 3. c4 c6 4. Bg2 Nf6 5. Qa4 Nbd7 6. cxd5 cxd5 7. Nc3 e6 8. Nf3 Bd6 9. O-O O-O 10. d3 a6 11. Bg5 Be7 12. e4 Nc5 13. Qc2 dxe4 14. dxe4 Ng4 15. Rad1 Qc7 16. Bxe7 Qxe7 17. Rfe1 Bd7 18. b4 Rac8 19. bxc5 Rxc5 20. Qb3 Rfc8 21. Ne2 Rb5 22. Qd3 Be8 23. Ned4 Rb2 24. Rd2 Rxd2 25. Nxd2 e5 26. Nf5 Qc5 27. Ne3 Bb5 28. Qd5 Nxe3 29. Qxc5 Rxc5 30. Rxe3 Rc2 31. Nf3 f6 32. a3 Bc4 33. Bf1 Be6 34. Bd3 Rc1+ 35. Kg2 b5 36. Re2 Rc3 37. Rd2 Rxa3 38. Be2 Kf7 39. Rd8 Ra2 40. Bf1 b4 41. Rb8 a5 42. Rb7+ Kg6 43. Ne1

[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] FEN: 1Q4r1/8/3B4/8/3pp2P/1k4P1/5PK1/8 b - - 0 54

[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] 1. b4 e5 2. Bb2 f6 3. e4 Bxb4 4. Bc4 c6 5. Qh5+ g6 6. Qh4 d5 7. exd5 Bc5 8. dxc6 Nxc6 9. Ne2 f5

[Assistant] Qxd8+


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

[User] 1. b4 Nf6 2. Bb2 g6 3. Bxf6 exf6 4. a3 Bg7 5. c4 h5 6. Nc3 h4

[Assistant] e3


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

[User] FEN: r7/R5kp/5pp1/Q2Pr3/8/5P2/P1q3PP/3R2K1 b - - 0 26

[Assistant] Kh6


[System] You are a chess 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/4k1p1/5pP1/5K2/5P1P/8 b - - 2 62

[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] FEN: r1bqr1kb/ppp4p/5ppP/8/8/1P1PR3/1BQ2PP1/5K1R w - - 0 20

[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. e4 e6 2. Nf3 d5 3. exd5 exd5 4. d4 Bg4 5. g3 Nc6 6. Bg2 Bd6 7. h3 Bh5 8. O-O Nge7 9. c3 f6 10. Kh2 Qd7 11. Re1 O-O-O 12. Qd3 g5 13. Nbd2 Bg6 14. Qe2 h5 15. Qe6 g4 16. Qxd7+ Kxd7 17. Nh4 Bd3 18. Nb3 gxh3 19. Bxh3+

[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 Nc6 2. e3 e5 3. Nf3 exd4 4. Nxd4 Ne5 5. Nc3 Ng6 6. Bc4 Nf6 7. Bd2 d5 8. Bd3 c6 9. h4 Ne5 10. h5 h6 11. Be2 Bd6 12. Nb3 Qe7 13. f4 Neg4 14. Bxg4 Nxg4 15. Qf3 Bf5 16. O-O-O

[Assistant] Nf6


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

[User] FEN: 8/1q2k3/1N6/1KP5/1P6/8/8/8 w - - 1 52

[Assistant] c6


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

[User] 1. d4 d6 2. c4 e5 3. dxe5 dxe5 4. Qc2 Nc6 5. Nc3 Nf6 6. e3 Be6 7. a3 a5 8. Nf3 Be7 9. b3 O-O 10. Bb2 Nd7 11. Rad1 f6 12. Be2 Qe8 13. O-O Qg6 14. Qxg6 hxg6 15. Bd3 g5 16. Bg6 Nc5 17. Bc2 g6 18. Nd5 Bd6 19. b4 axb4 20. axb4 Na4 21. Bxa4

[Assistant] Rxa4


[System] You are a chess grandmaster. 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. f4 Nf6 5. Nf3 Bg4 6. c3 Bxf3 7. Qxf3 e6 8. Bd3 g6 9. O-O h5 10. Nd2 Bg7 11. Qh3 Nbd7 12. Nf3 Qb6 13. Ne5 Nxe5 14. fxe5 Nd7 15. Qf3 Nxe5 16. Qg3 Nxd3 17. Qxd3 O-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] FEN: 1r2r1k1/1p3ppp/3Rb3/1R2P1q1/4B1P1/4QP2/2P1K3/8 b - - 2 33

[Assistant] Bc4+


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

[User] 1. c4 e5 2. g3 Bc5 3. Bg2 d6 4. b4 Bb6 5. Nc3 a5 6. Qa4+ Nc6 7. c5 dxc5 8. Bxc6+ bxc6 9. bxc5 Ba7 10. Nf3 Ne7 11. Nxe5 O-O 12. Ba3 Be6 13. Nxc6 Nxc6 14. Qxc6 Rb8 15. Qa4 Qf6 16. Qxa5 Ra8 17. Bb4 Rfb8 18. Rb1 Qe5 19. f4 Qd4 20. e3 Qd3 21. Qxc7 Rc8 22. Qd6 Qc4 23. Qd4 Qa6 24. a4 Rab8 25. e4 Rd8 26. Qe3 Rd3 27. Qe2 Bc4 28. Qh5 Rbd8 29. Rb2 Qe6 30. Qf5 Qh6 31. Ba5 Re8 32. Bb6 Bb8 33. O-O g6 34. Qg4 Qg7 35. e5 f5 36. Qh3 Qd7 37. Qg2 Qd4+ 38. Kh1 Rxc3 39. dxc3 Qd3 40. Kg1 Qxc3 41. Rfb1 Bd3 42. Qd5+ Kh8 43. Bd8

[Assistant] h5


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

[User] 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 Nf6 6. Nge2 O-O 7. O-O d6 8. d4 Bf5 9. a3 Qc8 10. Re1 Bh3 11. Bh1 Rd8 12. Nf4 Bg4 13. f3 Bf5 14. Ncd5 Nxd5 15. cxd5 Na5 16. e4 Bd7 17. dxc5 Qxc5+ 18. Be3 Qb5 19. b4 Nc4 20. Bd4 Bxd4+ 21. Qxd4 Qb6 22. Red1 Rdc8 23. Qxb6 axb6

[Assistant] Rd3


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

[User] 1. d4 d6 2. c3 e5 3. dxe5 dxe5 4. Qxd8+ Kxd8 5. e4 c6 6. Be3 Be6 7. Nd2 Nd7 8. Bc4 Bxc4 9. Nxc4 f6 10. O-O-O Kc7 11. Ne2 g6 12. f3 Nh6 13. Kc2 Nf7 14. Nc1 Be7 15. Nb3 b6 16. a4 Rad8 17. Rd2 b5 18. axb5 cxb5 19. Nca5 a6 20. Rhd1 Bd6 21. g3 Rhe8 22. h4 h5 23. Rd5 Nb6 24. Bxb6+ Kxb6 25. R1d3 Bc7 26. Rd1 Rxd5 27. Rxd5 Rd8 28. Rxd8 Nxd8 29. Kd3 Ne6 30. c4 Bd6 31. Kc3 g5 32. c5+ Bxc5 33. Nxc5 Nxc5 34. Nb3 Nxb3 35. Kxb3 gxh4 36. gxh4 Kc5 37. Kc3 a5 38. b3

[Assistant] Kc6


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

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. f3 d6 6. c4 Nd7 7. Nb3 Qc7 8. Nc3 b6 9. Be3 Bb7 10. Rc1 Ngf6 11. Qd2 Be7 12. Be2 O-O 13. O-O Ne5 14. Nd4 Nxc4 15. Bxc4 Qxc4 16. Nd5 exd5 17. Rxc4 dxc4 18. Nf5 Rfe8 19. Nxe7+ Rxe7 20. Qxd6 Rd7 21. Qxb6 Rad8 22. Bg5 Rd6 23. Qa5 Re8 24. e5 Rd5 25. Qa4 Rdxe5 26. Bxf6 gxf6 27. Qxc4 R5e6 28. Qg4+ Kh8 29. Qh4 Bc6 30. h3 Bb5 31. Rf2 Re1+ 32. Kh2 R1e6 33. Rc2 Rg8 34. b3 Rg6 35. Rf2 Kg7 36. f4 f5 37. g4 Ref6 38. g5 Re6 39. Qg3 Rd6 40. h4 h5 41. Qc3+ Kh7 42. Rd2 Rc6

[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: 2k2r1r/pp1q4/3pN1p1/3Pp3/1P4P1/P3P1P1/3BQ1K1/R7 b - - 2 26

[Assistant] Qh7


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

[User] 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5 Ne4 7. Bc4

[Assistant] Bc5


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

[User] 1. d4 e6 2. Nf3 d5 3. c4 Nf6 4. cxd5 exd5 5. e3 c6

[Assistant] Be2


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

[User] 1. e4 g6 2. d4 Bg7 3. f4 e6 4. Nf3 Ne7 5. Bd3 O-O 6. O-O d6 7. c3 Nd7 8. Nh4 b6 9. f5 Bb7 10. Qg4 Nf6 11. Qh3 Bxe4 12. Bxe4 Nxe4 13. fxe6 f5 14. Nd2 Ng5 15. Qg3 Nxe6 16. Ndf3 Nd5 17. Bg5 f4 18. Qg4 Qd7 19. c4 Ne3 20. Qh3 Nxf1 21. d5 Nc5 22. Qxd7 Nxd7 23. Rxf1 Bxb2 24. Nd2 Rfe8 25. Ndf3 Be5 26. Bxf4 Bxf4 27. g3 Be3+ 28. Kg2 Re4 29. Ng5 Rae8 30. Nxe4 Rxe4 31. Nf3 Re5 32. Nxe5 Nxe5 33. Re1 Nxc4 34. Kf3 Bc5 35. Re7 Ne5+ 36. Ke4 Ng4 37. Rxc7 Nf6+ 38. Kd3 a6 39. Ra7 Nxd5 40. Rxa6

[Assistant] Nb4+


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

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nfd7 7. Nge2 c5

[Assistant] Qd2


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

[User] 1. e4 d5 2. exd5 Qxd5 3. d4 Qd8 4. f4 Nf6 5. Nf3 e6 6. c3 Be7 7. Bd3 c5 8. O-O cxd4 9. cxd4 Nc6 10. Nc3 Nd5 11. Be3 Nxe3 12. Qe2 Nxf1 13. Rxf1 Nxd4 14. Nxd4 Qxd4+ 15. Kh1 O-O 16. f5 exf5 17. Nb5 Qc5

[Assistant] a4


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

[User] FEN: r2r2k1/ppq2pbp/2p3p1/8/P3pNn1/1P2P3/1BPR1PPP/1R1Q2K1 w - - 2 19

[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. Nf3 c6 3. c4 Nf6 4. cxd5 cxd5 5. Nc3 e6 6. Bf4 Nc6 7. e3 Bd6 8. Bxd6 Qxd6 9. Bd3 a6 10. O-O Bd7 11. Rc1 Ng4 12. a3 e5 13. dxe5 Ncxe5 14. Nxe5 Nxe5 15. h3 h5 16. Ne2 Ng4 17. g3 Nf6 18. Nd4 Bxh3 19. Re1 Bg4 20. Be2 Bxe2 21. Qxe2

[Assistant] h4


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

[User] 1. e4 c5 2. d4 cxd4 3. c3 d3 4. Bxd3 b6 5. f4 Bb7 6. Nf3 e6 7. O-O d6 8. Be3 Nd7 9. Kh1 Qc7 10. Re1 Ngf6 11. Na3 a6 12. Rc1 Be7 13. Bb1 O-O 14. Bg1 Rfd8 15. Qd3 b5 16. Rcd1 g6 17. Nc2 Nc5 18. Qf1 Ncxe4 19. Ncd4 e5 20. fxe5 dxe5 21. Nb3 Rxd1 22. Rxd1 Ng4 23. Bxe4 Bxe4 24. Re1 f5 25. h3 Nf6 26. Ng5 Qc4 27. Nc5 Bxc5 28. Qxc4+ bxc4 29. Bxc5 Rb8 30. Ba3 Rb5 31. Kg1 Bd3 32. Nf3 e4 33. Nd4 Rd5 34. g3 Kf7 35. Kf2 h5 36. Bb4 Nd7 37. Ba3 Ne5 38. Ke3 Kf6 39. h4 Nd7 40. b3 Ra5 41. Bb4 Rxa2 42. bxc4 Ne5 43. Nb3 Bxc4 44. Na5 Nf3 45. Rb1

[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. c4 c6 2. Nc3 d5 3. cxd5 cxd5 4. d4 e6 5. Bf4 Nf6 6. e3 g6 7. Nf3 Bg7 8. Bd3 O-O 9. O-O b6 10. Ne5 Ba6 11. Qe2 Bxd3 12. Qxd3 Nbd7 13. Nf3 h5 14. Bg5 Rc8 15. h3 Qc7 16. Rac1 Qb7 17. Ne2 Rxc1 18. Rxc1 Rc8 19. Rxc8+ Qxc8 20. Nf4 Ne4 21. Bh4 Qc1+ 22. Kh2 Qxb2 23. Ne2 Qxa2 24. Ng5 Nxg5 25. Bxg5 Qc4 26. Qd2 Nf6 27. Bxf6 Bxf6 28. Ng3 Be7 29. e4 dxe4 30. Nxe4 Qd5 31. f3 Bd6+ 32. Kg1 e5 33. Nf6+ Kf8 34. Nxd5 exd4 35. Kf1 Bc5 36. Qe2 Kg7 37. Qe5+

[Assistant] f6


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

[User] 1. e4 c5 2. b3 Nc6 3. Bb2 Nf6 4. Nc3 d6 5. f4 g6 6. Nf3 Bg7 7. Bb5 O-O 8. Bxc6 bxc6 9. e5 Nd5 10. Nxd5 cxd5 11. h3 Bf5 12. d3 Rb8 13. Qe2 c4 14. dxc4 dxc4 15. O-O d5 16. Bd4 a5 17. g4 Be4 18. Ng5 cxb3 19. axb3 Qc8 20. Nxe4 dxe4 21. Qxe4 Rd8 22. Rfd1 e6 23. Rxa5 Bf8 24. Ra4 Bc5 25. Rc4 Bxd4+ 26. Rdxd4 Qa6 27. Ra4 Qb6 28. Kg2 Rbc8 29. Rxd8+ Rxd8 30. Ra8 Kg7 31. Rxd8 Qxd8 32. Qd3 Qa8+

[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Nf3 Bg4 5. h3 Bh5 6. d4 Nf6 7. Bd2 c6 8. Bc4 Nbd7 9. Ne4 Qc7 10. Nxf6+ gxf6 11. c3 Rg8 12. g4 Bg6 13. Nh4 e6 14. Qb3 O-O-O 15. Nxg6 hxg6 16. O-O-O Bd6 17. a4 Nb6 18. Bd3 Nd5 19. a5 Nf4 20. Bc4 Rh8 21. h4 Ng2 22. h5 Nf4 23. h6 g5 24. Kb1 Qxa5 25. Bxf4 Bxf4 26. h7 Qc7 27. Rh6 Qe7 28. Bd3 Kb8 29. Bc2 c5

[Assistant] d5


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

[User] FEN: 5k2/p4P2/1p6/2pR4/B1P3rp/8/PP1prRPb/5K2 b - - 1 40

[Assistant] Re1#


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

[User] FEN: 3k1b1r/p4p2/1P1p4/5p2/5qp1/1P2R3/P4P2/R2Q1K2 b - - 0 27

[Assistant] Rh1+


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

[User] 1. e3 c5 2. d4 g6 3. f4 Bg7 4. Nf3 cxd4 5. exd4 d6 6. c3 Nc6 7. Be2 Bg4 8. O-O Bxf3 9. Bxf3 Nf6 10. Be3 O-O 11. Nd2 e5 12. fxe5 dxe5 13. Nb3 exd4 14. Nxd4 Nd5 15. Bxd5 Qxd5 16. Nxc6 Qxc6 17. Qf3 Qxf3 18. Rxf3 Rfd8

[Assistant] Raf1


[System] You are a chess 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. cxd5 c6 3. Nc3 cxd5 4. d4 Nf6 5. g3 Bf5 6. Bg2 e6 7. Bg5 Be7 8. Bxf6 Bxf6 9. e3 O-O 10. Nge2 a6 11. O-O Bg6 12. a3 Nc6 13. b4 Rc8 14. Rc1 Qd7 15. Nf4 Bf5 16. Qh5 g6 17. Qh6 Bg7 18. Qh4

[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: 6k1/pp2r1p1/2p4p/3qpQ2/8/3P3P/PP4PK/5R2 w - - 0 29

[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. e3 c6 2. d4 d5 3. Nf3 Bg4 4. Be2 Bxf3 5. Bxf3 e6 6. c4 Nf6 7. cxd5 exd5 8. Nc3 Bd6 9. O-O O-O 10. e4 Re8 11. e5 Be7 12. exf6 Bxf6 13. Be3 Qb6 14. Qb3 Qc7 15. Na4 Nd7 16. Nc5 Nxc5 17. dxc5 Rad8 18. Rad1 Be7 19. Bd4

[Assistant] Bf8


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

[User] FEN: 8/8/1k4p1/1b1p1p1p/Pp1P1P1P/3B2P1/P1K5/8 b - - 0 39

[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] 1. d4 d6 2. c4 e5 3. Nc3 exd4 4. Qxd4 Nf6 5. Bg5 Be7 6. Qh4 Nc6 7. Nf3 Bf5 8. e3 Qd7 9. Be2 h6 10. O-O-O O-O-O 11. Bf4 Ne4 12. Qh5 g6 13. Ne5 Nxe5 14. Bxe5 gxh5 15. Nd5 dxe5 16. Nb6+ axb6 17. Rxd7 Bxd7 18. f3 Nd6 19. Rd1 Bg5 20. Kd2 Be6 21. Kc3 f5 22. b3 Bf6 23. e4 fxe4 24. fxe4 Nxe4+ 25. Kc2 Bf5 26. Bd3

[Assistant] Rxd3


[System] You are a chess 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 g6 2. Bb2 Nf6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 b6 6. O-O Bb7 7. c4 d6 8. d4 Nbd7 9. Nc3 c5 10. d5 Ng4 11. Qc2 Nge5 12. Nxe5 Bxe5 13. e3 f5 14. f4 Bg7 15. e4 fxe4 16. Nxe4 Bxb2 17. Qxb2 Nf6 18. Ng5 Bc8 19. Rae1 h6 20. Nf3 Bf5 21. Re2 Bd3 22. Rfe1 Bxe2 23. Qxe2 Qd7 24. Nh4 Kh7 25. Qd3 Rg8 26. Re6 Qe8 27. Bh3 Qf7 28. f5 g5 29. Ng6 Rae8 30. Bg2 Kg7 31. h4 Nh7 32. Qe4 Nf8 33. f6+ exf6 34. Rxe8 Nxg6 35. Re6 Rd8 36. Qf5 Ne5 37. Be4 Ng6 38. Kg2 gxh4 39. a3 hxg3 40. Kxg3 Nf8

[Assistant] Qg4+


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

[User] 1. d4 Nf6 2. c4 Nc6 3. g3 e5 4. d5 Ne7 5. Bg2 Ng6 6. Nc3 Bc5 7. Nh3 O-O 8. O-O d6 9. Kh1 a6

[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 e6 2. Nc3 d5 3. d4 Bb4 4. exd5 exd5 5. Nf3 Nf6 6. Bd3

[Assistant] O-O


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

[User] FEN: 8/p4k1p/2Q3p1/8/3bP1n1/5N2/PP3qPP/2RR3K b - - 0 19

[Assistant] Qg1+


[System] You are a chess grandmaster. 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 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 a6 8. Qd2 b5 9. a3 Qb6 10. Be2 Be7 11. O-O O-O 12. g4 Bb7

[Assistant] g5


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

[User] 1. d4 d5 2. c4 c6 3. Nc3 Bf5 4. Qb3 Qb6 5. cxd5 Qxb3 6. axb3 Nf6 7. dxc6 Nxc6 8. e3 Bg6 9. Bb5 e6 10. Nf3 Bb4 11. Ne5 O-O 12. Bxc6 bxc6 13. Nxc6 Bxc3+ 14. bxc3 Rab8 15. Nxb8 Rxb8 16. b4 Rb7 17. O-O h6 18. f3 a6 19. Rxa6 Bd3 20. Ra8+ Kh7 21. Rd1 Be2 22. Rd2 Bc4 23. e4 Bb3 24. Rc8 Ba4 25. Ra2 Bd7 26. Rc5 Be8 27. Ra8 Bd7 28. Kf2 Ne8 29. e5 Nc7 30. Rd8 Nb5 31. Rxd7 Rxd7 32. Rxb5 Rc7

[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: 5rk1/p5p1/b1P1p2p/4P3/P5Q1/2B5/1Pq2PPP/R5K1 b - - 6 26

[Assistant] Qxf2+


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

[User] 1. d4 g6 2. c4 Bg7 3. Nf3 Nf6 4. Nc3 d5 5. e4 dxe4 6. Ne5 Bg4 7. Be3 Bxd1 8. Kxd1 Nbd7 9. Kc2 Nxe5 10. dxe5 Ng4

[Assistant] Rd1


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

[User] 1. e4 e5 2. Nf3 Nc6 3. Nc3 d6 4. Bc4 h6 5. d3 f5 6. Bxg8 Rxg8 7. d4 Qf6 8. d5 Ne7 9. Be3 Bd7 10. Qd3 a6 11. a4 f4 12. Bd2 g5 13. b4 g4 14. Ng1 h5 15. Nge2 Ng6 16. f3 Be7 17. Kd1 Nh4 18. Rg1 Kf7 19. Kc1 gxf3 20. gxf3 Rxg1+ 21. Nxg1 Rg8 22. Kb2 Rg2 23. Nge2 Rxh2 24. Rg1 Rh3 25. Rf1 Bg4 26. Ng1 Rg3 27. Be1 Rxg1 28. Bxh4 Rxf1 29. Bxf6 Rxf3 30. Qc4 Kxf6 31. Qxc7 h4 32. Qb8 Bh5 33. Qh8+ Kg5 34. Qg7+ Bg6 35. Qxe7+ Kg4 36. Qf6 Bh5 37. Ne2 h3 38. Qg7+ Kh4 39. Qf6+ Kg4 40. Ng1 Rg3 41. Qf5+ Kh4 42. Qf6+ Kg4 43. Qg7+ Kh4

[Assistant] Qf6+


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

[User] 1. e4 c6 2. Nc3 d5 3. d4 dxe4 4. Bf4 Nf6 5. f3 Bf5 6. Bc4 Nbd7 7. Qe2 exf3 8. Nxf3 e6 9. O-O Be7 10. Rae1 O-O 11. Bb3 Nd5 12. Bd2 Nxc3 13. bxc3 Nf6 14. Qf2 Bg6 15. Ne5 Ne4 16. Qe2 Nxd2 17. Qxd2 Bf6 18. Ng4 Bg5 19. Qe2 a5 20. a4 b5 21. axb5

[Assistant] a4


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

[User] 1. d4 Nf6 2. Nc3 d5 3. e4 dxe4 4. f3 exf3 5. Nxf3 Bg4 6. h3 Bh5 7. g4 Bg6 8. Ne5 Nbd7 9. Qf3 c6 10. Nxg6 hxg6 11. g5 Nh5 12. Bc4 e6 13. Rf1 Qe7 14. Bd2 Nb6 15. Bd3 Nc8 16. Ne4 f5 17. gxf6 gxf6 18. Nxf6+ Nxf6 19. Qxf6 Qxf6 20. Rxf6 Ke7 21. Rxg6 Rxh3 22. O-O-O Nd6 23. Bg5+ Kd7 24. Rf1 Re8 25. a4 Rg3 26. Rh1 Be7 27. Rh7 Nf5 28. Bxf5 exf5 29. Rgg7 Rxg5 30. Rxg5 Ke6 31. Rg6+ Kd5 32. Kd1 Kxd4 33. Re6 f4 34. Rexe7 Rg8 35. Rd7+ Ke3 36. Rhe7+ Kf2 37. Rxb7 f3 38. Rxa7 Kf1 39. Rf7 f2 40. Rad7 Re8 41. Kd2 Kg2 42. Rg7+ Kf1 43. Rdf7 Re2+ 44. Kc3 Ke1 45. Rg6 f1=Q 46. Rxf1+ Kxf1 47. Rxc6 Kf2 48. a5 Re5 49. a6 Ke3 50. b4 Re8 51. b5

[Assistant] Ke4


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

[User] 1. c4 Nf6 2. Nc3 d6 3. d4 e5 4. dxe5 dxe5 5. Qxd8+ Kxd8 6. g3 c6 7. Bg2 Be6 8. b3 Nbd7 9. Nf3 h6 10. Bb2 Kc7 11. O-O-O Bc5 12. Rhf1 Rhe8 13. Na4 Bd6 14. c5 Nxc5 15. Nxc5 Bxc5 16. Nxe5 Rad8 17. e3 a5 18. Nd3 Bd6 19. Nf4 Bg4 20. Rd2 a4 21. h3 Bf5 22. Rfd1 axb3 23. axb3 Bb4 24. Rxd8

[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 e6 2. c4 d5 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O 7. Bd3 h6 8. Bh4 Bg4 9. f3 Be6 10. Nge2 c5 11. O-O Nc6 12. Qd2 cxd4 13. Nxd4 Nxd4 14. exd4 Qb6 15. Qf2

[Assistant] Rac8


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

[User] 1. d4 Nf6 2. e3 e6 3. Nf3 d5 4. Bd3 c5 5. Nbd2 cxd4 6. exd4 Nc6 7. c3 Be7 8. Qe2 O-O 9. O-O Nd7 10. Re1 Bf6 11. Nf1 g6 12. Bh6 Bg7 13. Bxg7 Kxg7 14. Qe3 Kg8 15. Ng3 Qf6 16. Qh6 Qg7 17. Qxg7+ Kxg7 18. Re2 Nf6 19. Rae1 b6 20. a3 a5 21. h3 Ba6 22. Bxa6 Rxa6 23. Nd2 b5 24. Nb3 b4 25. Nc5 Rb6 26. axb4 axb4 27. Nf1 bxc3 28. bxc3 Rd8 29. g4 Nd7 30. Nxd7 Rxd7 31. Rc2 Rdb7 32. Rec1 Na5 33. Ne3 Rb2 34. Kf1 Rxc2 35. Rxc2 Rc7 36. Ke2 Nc4 37. Nxc4 Rxc4 38. Kd3 Kf6 39. f4 h5 40. Rf2 hxg4 41. hxg4 Ra4 42. Ke3 Ra3 43. Rc2 g5 44. Kf3 gxf4 45. Kxf4 Ra8 46. g5+ Kg6 47. Kg4 Ra4 48. Rf2 e5 49. Rf6+ Kg7 50. Kf5 exd4 51. cxd4 Rxd4

[Assistant] Rd6


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

[User] FEN: r1b1r1k1/pp3p1p/2n3p1/2p1Np1n/2B5/2PP3P/PP3PP1/R3R1K1 w - - 0 18

[Assistant] Bxf7+


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

[User] 1. c4 Nf6 2. Nc3 d5 3. d4 g6 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 8. Bd3 O-O 9. Bb2 cxd4 10. cxd4 Qa5+ 11. Qd2 Qxd2+ 12. Nxd2 Nc6 13. Nf3 Rd8 14. O-O Bg4 15. Rfd1 Bxf3 16. gxf3 Bxd4 17. Bxd4 Rxd4 18. Kg2 Rad8 19. Be2 Rxd1 20. Rxd1 Rxd1 21. Bxd1 e5 22. Kf1 f6 23. Ke2 Kf8 24. Kd3 Ke7 25. Kc4 Kd6 26. Bb3

[Assistant] Nd4


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 Nf6 4. Nc3 cxd4 5. Nxd4 a6 6. Be3 Ng4 7. Bc1 Nf6 8. f3 e5 9. Nb3 Be6 10. Be3 h5 11. Qd2 Nbd7 12. O-O-O g6 13. Be2 Qc7 14. Kb1 b5 15. Bg5 Be7 16. h4 b4 17. Nd5 Nxd5 18. exd5 Bxg5 19. hxg5

[Assistant] Bf5


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

[User] 1. b3 Nf6 2. Bb2 d6 3. f4 e6 4. Nf3 Nc6 5. g3 Be7 6. Bg2 O-O 7. O-O Nd7 8. e3 Bf6 9. c3 e5 10. d4 e4

[Assistant] Nfd2


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

[User] 1. b3 e5 2. Bb2 Nc6 3. e3 Nf6 4. Bb5 Bd6 5. Ne2 O-O 6. O-O Re8 7. d3 Ne7 8. a3 c6 9. Bc4 b5 10. d4 exd4 11. Qxd4 Nf5

[Assistant] Qd3


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

[User] 1. d4 d6 2. Nf3 Nf6 3. g3 Nbd7 4. Bg2 e5 5. O-O c6 6. e3 Qc7 7. c4 Be7 8. b3 Nf8 9. Bb2 Ng6 10. c5 e4 11. cxd6 Bxd6 12. Nfd2 Bg4 13. Qc1 Be2 14. Re1 Bd3 15. Nc3 Qe7 16. Nc4 Bxc4 17. bxc4 Bb4 18. Qc2 Bxc3 19. Bxc3 O-O 20. Rab1 Rfe8 21. Rb3 h5 22. h3 b6 23. a4 Qe6 24. Ba1 h4

[Assistant] g4


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

[User] 1. e4 c6 2. d4 d5 3. Nf3 dxe4 4. Ne5 Nf6 5. Bc4 e6 6. c3 Be7 7. Bg5 Nbd7

[Assistant] Bxf6


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

[User] 1. Nf3 Nf6 2. b3 g6 3. Bb2 Bg7 4. g3 O-O 5. Bg2 d6 6. d4 e5 7. dxe5 Ng4 8. O-O Nxe5 9. Nxe5 dxe5 10. Qc1 c6 11. c4 Bf5 12. Nc3 Nd7 13. Rd1 Qc7 14. Ne4 Bxe4 15. Bxe4 f5 16. Bg2 e4 17. Bxg7 Kxg7 18. Qc3+ Nf6 19. c5 Rfd8 20. b4 Rxd1+ 21. Rxd1 Rd8 22. Rb1 Qd7 23. a4 Qd4 24. Qxd4 Rxd4 25. b5 Rxa4 26. bxc6 bxc6 27. Rb7+ Kh6 28. Rc7 Ra1+ 29. Bf1 e3 30. fxe3 Ng4 31. Re7 Kg5 32. h3 Kf6 33. Re8

[Assistant] Kf7


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

[User] FEN: 5bk1/pR3b2/3r2pp/8/8/5QP1/PP3PKP/2r2B2 b - - 1 30

[Assistant] Bd5


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

[User] 1. e4 d5 2. Nc3 dxe4 3. Nxe4 Nf6 4. Ng3 e5 5. Nf3 Bd6 6. d3 Nc6 7. Bg5 O-O 8. Be2 h6 9. Bh4 g5 10. Nxg5 hxg5 11. Bxg5 Be7 12. Qd2 Nh7 13. Bh6 Re8 14. O-O-O Bg5 15. Bxg5 Qxg5 16. Qxg5+ Nxg5 17. h4 Ne6 18. Ne4 Ncd4 19. Bf1 Kg7 20. c3 Nf5 21. Rh3 Nf4 22. Rf3 Be6 23. g4 Nh6 24. g5 Nf5 25. Bh3 Nxh4 26. Re3 Nf5 27. Bxf5 Bxf5 28. Rg1 Bg6 29. Nf6 Rh8 30. b4 Rh2 31. Ne4 Bxe4 32. dxe4 Rxf2 33. Kb1 Ne2 34. Re1 Nf4 35. Rd1 Rh8 36. a4 Rhh2

[Assistant] g6


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

[User] 1. d4 c6 2. Nf3 d6 3. g3 g6 4. Bg2 Bg7 5. O-O Nf6 6. e4 O-O 7. e5 Nd5 8. c4 Nb6 9. exd6 exd6 10. Qc2 d5 11. c5 N6d7 12. Nc3 Nf6 13. Re1 Bg4 14. Bg5 Bf5 15. Qb3 Qd7 16. Ne5 Qc7 17. Bf4 Nh5 18. Nxg6 Nxf4 19. Nxf4 Bxd4 20. Ncxd5 cxd5 21. Nxd5 Qd7 22. Ne7+ Kh8 23. Qxb7 Qxb7 24. Bxb7 Nd7 25. Nxf5 Bf6 26. c6 Nc5 27. Bxa8

[Assistant] Nd3


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

[User] FEN: r4rk1/1bpn1p1p/pp1pn1p1/3N4/1PPBP3/5P2/P2qB1PP/2RR2K1 w - - 0 21

[Assistant] Ne7#


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

[User] 1. g3 d5 2. d4 c6 3. Nc3

[Assistant] Nf6


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

[User] 1. g3 d5 2. Bg2 g5 3. d3 f6 4. e4 h5 5. exd5 h4 6. Nc3 c6 7. dxc6 Nxc6 8. Be3 h3 9. Bf3 e5 10. Bh5+ Kd7 11. Bg4+ Kc7 12. Bxc8 Rxc8 13. Qf3 Kb8 14. O-O-O Nge7 15. Qxf6 Rg8 16. Nf3 Bg7 17. Qf7 Qd7 18. Nxg5 Rcf8 19. Qe6 Qc7

[Assistant] Qxh3


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

[User] 1. d4 Nf6 2. c4 c5 3. d5 b5 4. Nc3 b4 5. Nb1 e5 6. Nf3 d6 7. e4 Nxe4 8. Bd3 Nf6 9. Nbd2 Be7 10. Ne4 Nxe4

[Assistant] Bxe4


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

[User] 1. f4 g5 2. fxg5 h6 3. d4 hxg5 4. Bxg5 c5 5. Nf3 Bg7 6. c3 Nc6 7. dxc5 Qa5 8. Nbd2 Qxc5 9. Nb3 Qf5 10. Be3 d5

[Assistant] Qd2


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

[User] 1. e4 e6 2. g3 d5 3. Bg2 dxe4 4. Bxe4 Nf6 5. Bg2 Bd7 6. Ne2 Bc6 7. f3 e5 8. O-O Bd6 9. d3 O-O 10. h3

[Assistant] Nbd7


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

[User] 1. e4 c5 2. Nc3 d6 3. f4 Nc6 4. Nf3 g6 5. Bb5 Bg7 6. Bxc6+ bxc6 7. d3 Nf6 8. O-O O-O 9. Qe1 Qc7 10. Qh4 e5

[Assistant] f5


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

[User] 1. Nf3 d5 2. c4 c6 3. cxd5 Nf6 4. Nc3 cxd5 5. e3 Nc6 6. d4 Ne4 7. Nxe4 dxe4 8. Nd2 Bf5 9. Bb5 e6 10. Qa4 Rc8 11. O-O Bd6 12. b3 O-O 13. Ba3 Bb8 14. Bxf8 Qxf8 15. Rfc1 Qd6 16. Nf1 h5 17. Bxc6 bxc6 18. Rc4 e5 19. Rd1 Be6 20. Rcc1 Bd5 21. Qa6 Re8 22. a3 Re6 23. b4 Rg6 24. Qc8+ Qf8 25. Qh3 Be6 26. Qh4 Bg4 27. Rd2 Bd6 28. f4 Be7 29. Qf2 exf4 30. Qxf4 Bf3 31. g3 Bg5 32. Qc7 h4 33. Qxc6 hxg3 34. hxg3

[Assistant] Rxc6


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

[User] 1. e4 e6 2. d3 d5 3. Nc3 dxe4 4. dxe4 Be7 5. Nf3 Qxd1+ 6. Nxd1 Nf6 7. Bd3 O-O 8. Be3 b6 9. Nc3 Ba6 10. O-O-O Bxd3 11. cxd3 c5 12. d4 cxd4 13. Nxd4 Rc8 14. f3 Nc6 15. Kb1 Nxd4 16. Bxd4 h6 17. f4 Rc4 18. h3

[Assistant] Rac8


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

[User] 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. c3 c5 6. f4 f6 7. exf6 Qxf6 8. Ndf3 Nc6 9. a3 Bd6 10. Nh3 O-O 11. Bd3 cxd4 12. cxd4 Kh8 13. Be3 h6 14. O-O Nb6 15. Rc1 Bd7 16. Bb1 Nc4 17. Rxc4 dxc4 18. Qc2 Qf5 19. Qxc4 Qd5 20. Qd3 Rf5 21. g4 Be8 22. gxf5 Ne7 23. f6 Bg6 24. fxg7+ Kxg7 25. Qd2 Nf5 26. Bd3 Rg8 27. Kf2 Nxe3 28. Qxe3 Bf5 29. Rg1+ Kh7 30. Rxg8 Kxg8 31. Bxf5 Qxf5 32. Nfg1 Qc2+ 33. Ne2 Qf5

[Assistant] Qg3+


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

[User] 1. d4 Nf6 2. e3 e6 3. c4 c5 4. Nc3 cxd4 5. exd4 d5 6. Nf3 dxc4 7. Bxc4 Nc6 8. O-O Bb4 9. Re1 O-O 10. Bg5 a6 11. Bd3 b5 12. Qd2 Bb7 13. Rac1 Rc8 14. Bb1 h6

[Assistant] Bxh6


[System] You are a chess grandmaster. 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. Bc4 Nb6 5. Bb3

[Assistant] Bf5


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

[User] 1. d4 d6 2. e3 Nf6 3. Nf3 g6 4. Bd3 Bg7 5. Qe2 O-O 6. Nbd2 Nbd7 7. O-O e5 8. c3 Re8 9. e4 c5 10. d5 a6 11. c4 b5 12. b3 Rb8 13. Re1 Nh5 14. Nf1 Nf4 15. Bxf4 exf4 16. Rad1 g5 17. h3 h5 18. N3h2 Ne5 19. Qxh5 Qf6 20. Ng4 Bxg4 21. hxg4

[Assistant] Qh6


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

[User] FEN: 2k2r2/1pp3pp/p7/8/3P4/2B1PrnP/RPBK3R/8 b - - 1 25

[Assistant] Nf1+


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4

[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: 5r2/5pk1/4P2R/1p1Q1pPp/1b3P1P/q3B2R/1r2K3/8 w - - 1 35

[Assistant] Bd2


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

[User] FEN: r1r3k1/1p3ppp/p7/P1Nn1q2/8/1Q5P/1P3PP1/R3R1K1 w - - 1 26

[Assistant] g4


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

[User] FEN: 1r3rk1/2p2pp1/p1n2n1p/2p1p3/4q3/2P1BQ1P/BP3PP1/3RK2R w K - 0 18

[Assistant] Qxe4


[System] You are a chess grandmaster. 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. Nc3 Bg7 3. Bg5 c6 4. e4 Qa5 5. Qd2 d5 6. exd5 cxd5 7. Nf3 Nc6 8. Bb5 Bg4 9. Bxc6+ bxc6 10. O-O Bxf3 11. gxf3 Nf6 12. Rae1 e6 13. a3 O-O 14. Bh6 Qc7 15. Bxg7 Kxg7 16. Kg2 Nh5 17. Re5 Rae8 18. Rg1 Qe7 19. Kh1 Qh4

[Assistant] Ne2


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

[User] 1. e4 b6 2. d4 Bb7 3. Bd3 Nf6 4. Nf3 e6 5. Nbd2 d5 6. e5 Nfd7 7. O-O Be7 8. c3 c5 9. Re1 Nc6 10. Nf1 g6 11. Ng3 h5 12. h4 Bxh4 13. Nxh4 Qxh4

[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: 1r3q1k/5p1p/p1p1pP2/3p4/1P2nR2/2P4Q/P3r2P/6RK w - - 2 30

[Assistant] Qxh7+


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

[User] FEN: 8/7p/pp2p1p1/2k2p2/2P2P2/1P2K1P1/P6P/8 w - - 2 36

[Assistant] a3


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

[User] FEN: r6k/5rpp/2pp2P1/3n1n2/pPBQp3/P3P2q/1B4R1/2R3K1 w - - 0 37

[Assistant] gxf7


[System] You are a chess grandmaster. 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 Nxe4 6. Bxc6 dxc6 7. Nxe5

[Assistant] Nc5


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

[User] 1. e4 c5 2. Be2 d6 3. f4 Nc6 4. d3 g6 5. Nf3 Bg7 6. O-O Bg4 7. c3 e6 8. h3 Bxf3 9. Bxf3 Nge7 10. Be3 O-O 11. d4 b6 12. d5 exd5 13. exd5 Na5 14. b3 Nf5 15. Bf2 Re8 16. Qd2 Nh4 17. Bd1 b5 18. Bc2 c4 19. b4 Nb7 20. Bd4 a5 21. Bxg7 Kxg7 22. Qd4+ Qf6 23. Qxf6+ Kxf6 24. Nd2 axb4 25. cxb4 Ra3 26. Kh2 Rea8 27. g3 Nf5 28. Bxf5 gxf5 29. Nf3 Rxa2+ 30. Rxa2 Rxa2+ 31. Kg1 Rb2 32. Nd4 Rxb4 33. Nc6 Rb2 34. Nd4 c3 35. g4 b4 36. g5+ Kg6 37. Rc1 Nc5 38. h4 Ne4 39. h5+ Kxh5 40. Nxf5 Kg4 41. Ne3+ Kf3 42. Nc4

[Assistant] Rg2+


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

[User] 1. Nf3 Nf6 2. c4 e6 3. e3 d5 4. Nc3 dxc4 5. Bxc4 b5 6. Bxb5+ c6 7. Bf1 Bd7 8. Qc2 Be7 9. a3 O-O 10. b4 Na6 11. Bb2 Nxb4 12. axb4 Rb8 13. h4 Rxb4 14. Ng5 Qc8 15. Nce4 g6 16. Nxf6+ Bxf6 17. Bxf6 Rc4

[Assistant] Qxc4


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

[User] FEN: r4k2/6p1/2pq1p1p/1p1pR3/3P1Q2/2P2PP1/1P5P/5K2 w - - 0 33

[Assistant] Re8+


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

[User] 1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. Bg5 Qa5 5. Bxf6 gxf6 6. Nf3 h5 7. Be2 h4 8. h3 Na6 9. Bxa6 Qxa6 10. Qe2 Qa5 11. O-O-O b5 12. a3 b4 13. axb4 Qxb4 14. d5 Rb8 15. dxc6 Qxb2+ 16. Kd2

[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. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3 Bd7 7. O-O cxd4 8. cxd4 Nxd4 9. Ng5

[Assistant] h6


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

[User] 1. b3 d5 2. Bb2 Bg4 3. g3 c6 4. Bg2 Nd7 5. h3 Bh5 6. Nf3 Bxf3 7. Bxf3 Ngf6 8. O-O g6 9. c4 Bg7

[Assistant] cxd5


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

[User] FEN: 2r2k2/p2n4/1p2p1R1/3pP3/3P3q/1P1K4/P5Q1/r7 w - - 1 34

[Assistant] Rg8+


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

[User] 1. d4 g6 2. c4 Bg7 3. Nc3 Nf6 4. e4 O-O 5. f3 d6 6. Be3 e5 7. Nge2 exd4 8. Nxd4 Nc6 9. Qd2 Nxd4 10. Bxd4 Be6 11. O-O-O Qe7 12. g4 Nd7 13. h4 Ne5 14. Be2 c5 15. Bxe5 dxe5

[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. Nf3 c5 2. c4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2 e5 6. O-O Nge7 7. Ne1 O-O 8. Nc2

[Assistant] d6


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

[User] 1. e4 d6 2. d4 Nf6 3. f3 Nbd7 4. c3 e5 5. Be3 Be7 6. Bd3 O-O 7. Ne2 d5 8. Ng3 dxe4 9. fxe4 exd4 10. cxd4 Nb6 11. Nc3 Bg4 12. Qd2 Nh5 13. Nxh5 Bxh5 14. O-O Bg6 15. e5

[Assistant] Nd5


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

[User] 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Bc4

[Assistant] Bf5


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

[User] 1. e4 e6 2. d4 d5 3. e5 c5 4. Ne2 Nc6 5. c3 Bd7 6. g3 Rc8 7. Bg2 Nh6 8. Bxh6 gxh6 9. O-O

[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. Nf3 d5 3. exd5 exd5 4. d4 Bf5 5. Bd3 Bxd3 6. Qxd3 Nc6 7. O-O Qd7 8. c4 O-O-O 9. c5 Nf6 10. Bd2 Ne4 11. b4 f6 12. b5 Nb8 13. a4 c6 14. Nc3 g5 15. Nxe4 dxe4 16. Qxe4 h5 17. Bc3 Bg7 18. Nd2

[Assistant] Rde8


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

[User] FEN: r4r1k/ppp3pn/3bq2p/8/2NQ2PP/2PPB3/PP3P2/R3K2R b KQ - 4 18

[Assistant] Rf4


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

[User] 1. d4 Nf6 2. e3 d5 3. f4 c5 4. Nf3 cxd4 5. exd4 Nc6 6. c3 Bg4 7. Bd3 Bxf3 8. Qxf3 e5 9. O-O e4 10. Bxe4 Nxe4 11. Qf2 f5 12. Qe2 Bd6 13. Nd2 O-O 14. Nf3 Ne7 15. Ne5 Bxe5 16. fxe5 g6 17. Rf3 Rc8 18. Bh6 b5 19. Bxf8 Qxf8 20. Rh3 Qh6 21. Rxh6 Kg7 22. Rh3 a5 23. Qe1 b4 24. Qh4 Kf7 25. Qxh7+ Ke6 26. Rh6 Rg8 27. c4 Ng5 28. cxd5+ Kd7 29. e6+ Kd6 30. Qxg8 Nxg8 31. Rxg6 Ne7 32. Rxg5 Nxd5 33. Rf1 Ne7 34. Rgxf5 Nxf5 35. Rxf5 Kxe6

[Assistant] Rxa5


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

[User] FEN: 8/1p4k1/1pp4p/1P1b2p1/P1K1Bp2/5P1P/6P1/8 w - - 0 44

[Assistant] Bxd5


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

[User] FEN: rn4k1/p1q1prbp/6p1/2N5/2Q2B2/5P1P/PP3P2/R4RK1 b - - 2 21

[Assistant] Qxf4


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

[User] 1. Nf3 d6 2. g3 c6 3. Bg2 Nd7 4. O-O Qc7 5. d3 Ngf6 6. Nbd2 e5 7. Re1 Be7 8. e4 Nf8 9. c3 Ng6 10. Qc2 Bd7 11. a4 Qc8 12. b3 Bh3 13. Bh1 h5 14. Ba3 h4 15. d4

[Assistant] hxg3


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

[User] 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. Bc4 Nf6 5. Nf3 e6 6. d4 Be7 7. Qe2 O-O 8. O-O c6 9. Re1 Nd5 10. Ne4 Nd7 11. c3 N7f6 12. Ne5 Nxe4 13. Qxe4 a6 14. Bd3 f5 15. Qe2 Qc7 16. a3 Bd6 17. Nc4 Be7 18. h3 Bf6 19. Bd2 b5 20. Ne5 Bxe5 21. Qxe5 Qxe5 22. Rxe5 Bd7 23. Rae1 Nf6 24. Bg5 Nd5 25. Bb1 h6 26. Bh4 g5 27. Bg3 f4

[Assistant] Bh2


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

[User] FEN: 7K/5kP1/R7/p7/6r1/8/8/8 b - - 6 62

[Assistant] Rh4+


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

[User] FEN: r1bk3r/2pp1ppp/p1p2n2/4Q3/6q1/3B1N2/PB3PPP/R3b1K1 w - - 0 18

[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] FEN: 5k2/ppq1N1p1/5p1p/7B/3p4/P6P/b1r3P1/4R2K w - - 6 31

[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. e4 c5 2. d4 cxd4 3. Nf3 a6 4. Nxd4 Nf6 5. Nc3 e5 6. Bg5 exd4 7. Qxd4 Nc6 8. Qe3 Bb4 9. O-O-O Bxc3 10. Qxc3 Nxe4 11. Bxd8 Nxc3 12. Re1+ Kxd8 13. bxc3 Re8 14. Bc4 Rxe1+ 15. Rxe1 f6 16. Bf7 Ne5 17. Bh5

[Assistant] g6


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

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 6. Bc4 Bc5 7. Nb3 Ba7 8. Qg4 Qf6 9. O-O b5 10. Bd3 Ne5 11. Qg3 Nxd3 12. cxd3 Nh6 13. Be3 O-O 14. f4 d5 15. exd5 Nf5 16. Bxa7 Nxg3 17. Bd4 Qg6 18. hxg3 Qxg3 19. Rf3 Qg6 20. Kf2 Bb7 21. Rg3 Qf5 22. Rxg7+ Kh8 23. Rg5+ f6 24. Rxf5 exf5 25. a3

[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. c4 d5 2. cxd5 c6 3. dxc6 Nxc6 4. Nf3 e5 5. g3 e4 6. Ng1 Bc5 7. Nc3 Qf6 8. Nxe4 Qe7 9. Nxc5 Qxc5 10. Nf3 Nf6 11. Bg2 Ng4 12. O-O h5 13. h4 Qd6 14. d3 Be6 15. Bf4 Qd7 16. Ng5 Bf5 17. Rc1 f6 18. Qa4 fxg5 19. Rxc6 O-O 20. Rc4 Qxa4 21. Rxa4 gxf4 22. Rxf4 Be6 23. Bxb7 Rab8 24. Rxf8+ Rxf8 25. a3 Bb3 26. Bf3 Ne5 27. Be4 Rc8 28. Kg2 Rc2 29. d4 Rxe2 30. dxe5 Rxe4 31. Rc1 Bd5

[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] FEN: 8/p1p4r/1p3p2/5P2/4k1n1/8/PPP3N1/2K2R2 w - - 1 30

[Assistant] Rf4+


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

[User] FEN: 4R3/pR3pkp/6p1/3n4/2p1B3/6P1/4qP1P/6K1 w - - 5 29

[Assistant] Rxf7+


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

[User] 1. g3 Nf6 2. Bg2 g6 3. e3 Bg7 4. Ne2 O-O 5. d4 d5 6. O-O c6 7. c4 Nbd7 8. Nbc3 Re8 9. Qb3 e6 10. cxd5 exd5 11. Rd1 Qb6 12. Qxb6 Nxb6 13. b3 a5 14. Ba3

[Assistant] a4


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

[User] FEN: 4qrk1/pp5p/3p1Q1P/6p1/2p5/5P2/PP1K2P1/1b1Bn3 w - - 0 34

[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. Nf3 d6 2. g3 Bg4 3. Bg2 Bxf3 4. Bxf3 Nc6 5. Bg2 e5 6. O-O Nf6 7. d3 Be7 8. c3 O-O 9. Bg5 h6 10. Bxf6 Bxf6 11. e4 Rb8 12. Nd2 Re8 13. Nb3 Be7 14. d4 exd4 15. cxd4 Nb4 16. d5 Na6 17. a3 Nc5 18. Nd4 Bf6 19. b4 Bxd4 20. Qxd4 Na6 21. Qc3 Rc8 22. Rac1 Nb8 23. f4 Nd7 24. Qd4 f6 25. Rfe1 Re7

[Assistant] Bh3


[System] You are a chess grandmaster. 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. e4 e6 5. e5 Nfd7 6. f4 c5 7. dxc5 Bxc5 8. cxd5 exd5 9. Qxd5 O-O 10. Bc4 Qb6 11. Nf3 Bf2+ 12. Kf1 Nc6 13. Na4 Qa5 14. Kxf2 Qxa4 15. b3 Qb4 16. Bd2 Qc5+ 17. Be3 Qxd5 18. Bxd5 Nb4 19. Bc4 a6 20. a3 b5 21. axb4 bxc4 22. bxc4 Bb7 23. Nd4 f6 24. e6 Ne5 25. fxe5 fxe5+ 26. Nf3 e4

[Assistant] Bc5


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

[User] 1. b4 c5 2. b5 c4 3. a4 d5 4. d3 cxd3 5. exd3 Nd7 6. c4 Ndf6 7. Nf3 dxc4 8. dxc4 Qxd1+ 9. Kxd1 Bg4 10. Bb2 O-O-O+ 11. Ke1 Ne4 12. Be2 Bxf3 13. Bxf3 Nc5 14. Nc3 Nd3+ 15. Ke2 Nxb2

[Assistant] Rhb1


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

[User] FEN: r2qr1k1/1R3ppp/8/p4B2/8/b2P3P/5PP1/3Q1RK1 w - - 0 21

[Assistant] Bxh7+


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

[User] 1. e4 e5 2. Nf3 d6 3. Bc4 Nd7 4. O-O c6 5. c3 h6 6. d4 Ngf6 7. Re1 Be7 8. Bb3 O-O 9. Nbd2 b5 10. Nf1 a5 11. Ng3 c5 12. Nf5 c4 13. Bc2 Bb7 14. Qe2 Re8 15. h3 Bf8 16. a3 exd4 17. cxd4 Nxe4 18. Qd1 Ndf6 19. Bf4 b4 20. Ba4 c3 21. Bxe8 cxb2 22. Bxf7+ Kxf7 23. Qb3+ d5 24. Qxb2 Kg8 25. Ne5 Nc3 26. axb4 axb4 27. Rxa8 Qxa8 28. Ng6 Qc8 29. Nxf8 Qxf5 30. Ne6 Bc8 31. g4 Qd3 32. Qxb4

[Assistant] Bxe6


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

[User] FEN: 3k3r/ppN3p1/3bp1p1/1B6/6P1/4P3/PP4K1/2R4n w - - 2 26

[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. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 e6 5. O-O d5 6. c4 Nbd7 7. Ne5 Nxe5 8. dxe5

[Assistant] Ne4


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

[User] 1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. Nc3 Bb4 5. Bg5 h6 6. Bxf6 Qxf6 7. e3 O-O 8. Rc1 Bxc3+ 9. Rxc3 b6 10. Be2 Bb7 11. O-O Nd7 12. cxd5 exd5 13. Rxc7 Bc8 14. Qc2 Nb8 15. Rxc8 Rxc8 16. Qxc8+ Kh7 17. Qb7 Qc6 18. Qxc6 Nxc6 19. Rc1 Ne7 20. Rc7 Nf5 21. Bd3 g6 22. g4 Nd6 23. Rd7 Ne4 24. Rxf7+ Kg8 25. Rc7 a5 26. Bxe4 dxe4 27. Ne5 g5 28. h4 Rd8 29. h5 b5 30. Kg2 b4 31. Kg3 a4 32. Rc4 Rb8 33. Ng6 a3 34. b3 Kf7 35. f3 exf3 36. Kxf3 Kf6 37. e4 Rb5 38. Ke3 Ke6 39. d5+ Kd6 40. Rc6+ Kd7 41. Kd4 Rb7 42. Ne5+ Ke7 43. Rxh6 Rb5 44. Rg6 Kd8 45. Rxg5 Kc7 46. Rf5 Kb6 47. h6 Ka5 48. g5 Rb7 49. g6 Rg7 50. hxg7 Ka6

[Assistant] g8=Q


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

[User] 1. d4 f5 2. Nf3 Nf6 3. c4 g6 4. Nc3 Bg7 5. Bg5 O-O 6. e3 d6 7. Be2 Nc6 8. O-O h6 9. Bh4 g5 10. Bg3 Qe8 11. d5 Nd8 12. Nd4 e5 13. dxe6 Nxe6 14. Qb3 Nxd4 15. exd4 f4 16. c5+ Kh8 17. Bc4 fxg3 18. hxg3 Qh5 19. Nb5 dxc5

[Assistant] dxc5


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

[User] FEN: 1q6/3P2p1/2Q2pk1/4Rp1r/8/5p1P/5PPK/8 w - - 3 44

[Assistant] Qe6


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

[User] 1. b3 Nc6 2. Bb2 e5 3. Nf3 d6 4. d4 exd4 5. Nxd4 Ne5 6. Nc3 Nf6 7. e3 g6 8. Be2 Bg7 9. h4 O-O 10. h5 c5 11. Nf3 Qe7 12. h6 Bh8 13. Ng5 Bf5 14. f3 d5 15. g4 Be6 16. Qd2 Rad8 17. O-O-O d4 18. Nce4 dxe3 19. Qxe3 Nxe4 20. Nxe4 c4 21. g5 cxb3 22. axb3

[Assistant] Bf5


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

[User] 1. g3 Nf6 2. Nf3 g6 3. Bg2 Bg7 4. O-O d6 5. d4 Bd7 6. c3 Qc8 7. b3 Bh3 8. Bb2 h5 9. e3 Nc6 10. Nbd2 e5 11. e4 Ne7 12. dxe5 dxe5 13. Nxe5 h4 14. Qe2 Bxg2 15. Kxg2 hxg3 16. fxg3 Qh3+ 17. Kg1 O-O-O 18. Rad1 Ng4 19. Ndf3 Nxe5 20. Nxe5 Bxe5 21. c4 Bxb2 22. Qxb2 Nc6 23. Rxd8+ Rxd8 24. Qe2 Nd4 25. Qf2 f5 26. Rd1 c5 27. exf5 gxf5 28. Qf4 Qg4 29. Qe5 Qe4 30. Qxc5+ Kb8 31. Rf1 Nf3+ 32. Kg2

[Assistant] Nd2+


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

[User] 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. c4 Nc6 6. Be3 Qb6 7. Nb3 Qb4+ 8. Nc3 Nf6 9. f3 Nh5 10. Rc1 b6 11. a3 Qd6 12. Qxd6 exd6 13. Be2 Ba6 14. O-O Ne5

[Assistant] Nd2


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

[User] 1. f4 d5 2. Nf3 Nf6 3. e3 c5 4. Bb5+ Nc6 5. O-O Bd7 6. d3 e6 7. c4 Bd6 8. Nc3 a6 9. Ba4 Qc7 10. e4 Nd4 11. Bxd7+ Nxd7 12. cxd5 O-O 13. e5 Nxf3+ 14. Qxf3 Bxe5 15. fxe5 Nxe5 16. Qg3 f6 17. dxe6 Rad8 18. Bf4 Rfe8 19. Bxe5 fxe5 20. Rae1 Rxe6 21. Ne4 Re7 22. Nf6+ Kh8 23. Nh5 c4 24. Qf3 Qc5+ 25. Kh1 Red7 26. dxc4 e4 27. Qf5 Qxf5 28. Rxf5 g6 29. Rff1 gxh5 30. Rxe4 Rd2 31. h3 Rxb2 32. Re7 Kg8 33. Rc7 Rdd2 34. Rg1 Rdc2 35. Kh2 Rxa2 36. Rxb7 Rxc4 37. Ra7 Rcc2 38. Rb7 h4 39. Ra7 a5 40. Kh1 a4 41. Rb1 Rc8 42. Rbb7 Ra1+ 43. Kh2 Rf1 44. Rg7+ Kf8 45. Rxh7

[Assistant] Ke8


[System] You are a chess grandmaster. 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. e3 d6 4. Bd3 c5 5. c4 cxd4 6. exd4 Nc6 7. Nc3 Bd7 8. O-O Be7 9. Re1 O-O 10. d5 exd5 11. cxd5 Ne5 12. Nxe5 dxe5 13. Rxe5 Bd6 14. Re1 Ng4 15. h3 Nxf2 16. Kxf2 Qh4+ 17. Kg1 Bg3 18. Re4 Qf6 19. Qf3 Qxf3 20. gxf3 Bd6 21. Kg2 Bf5

[Assistant] Re3


[System] You are a chess 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/5P2/pKp5/P2b4/7k/8/8 w - - 1 45

[Assistant] f7


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

[User] 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Be3 a6 5. Qd2 Nd7 6. f4 b5 7. O-O-O Bb7 8. e5 e6 9. Nf3 Ne7 10. Bf2 Nb6 11. Rg1 Qd7 12. Bd3 Bxf3 13. gxf3 d5 14. h4 h5 15. Kb1 Bh6 16. Be3 Nc4 17. Bxc4 bxc4 18. b3 Qc6 19. Na4 Nf5 20. Ka1

[Assistant] Rb8


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

[User] FEN: 7k/p7/1p4p1/2pKP3/6P1/2P4n/PP6/8 w - - 0 38

[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: 1k5r/1p6/p2N1Bp1/8/QP1n4/2q4P/P5P1/5RK1 b - - 1 30

[Assistant] Ne2+


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

[User] 1. e3 e6 2. Ne2 d5 3. Ng3 c5 4. Be2 Nc6 5. O-O g6 6. c3 Bg7 7. d4 b6 8. Nd2 Nge7 9. Nf3 a5 10. Bd2 O-O 11. Qc1 Ba6 12. Bxa6 Rxa6 13. Re1 Ra8 14. b3 Rc8 15. Qc2 cxd4 16. exd4 Nxd4 17. Nxd4 Bxd4 18. Qd3 Bg7 19. Rad1 Nc6 20. Qe2 Qc7 21. Nf1 Qe5 22. Qb5 Qc7

[Assistant] Be3


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

[User] 1. d4 d5 2. Nf3 c6 3. c4 Nf6 4. Nbd2 Bg4 5. e3 e6 6. Bd3 Nbd7 7. Qb3 Qb8 8. O-O Bd6 9. h3 Bh5 10. Re1 O-O 11. e4 dxe4 12. Nxe4 Bxf3 13. gxf3 e5 14. Bg5 Nxe4 15. Rxe4 exd4 16. Rxd4 Nc5 17. Qc2 Ne6 18. Bxh7+ Kh8 19. Rh4

[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: 8/5rkp/2Bp1pp1/8/8/1Q1r2PP/PB3PK1/1q6 w - - 6 28

[Assistant] Bxf6+


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

[User] 1. d4 e6 2. c4 b6 3. Nc3 Bb7 4. e4 Bb4 5. Bd3 f5 6. exf5 Bxg2 7. Qh5+

[Assistant] Kf8


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

[User] 1. e4 c6 2. Nf3 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Ng3 Bg4 6. h3 Bxf3 7. Qxf3 Nbd7 8. Bc4 e6

[Assistant] O-O


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

[User] FEN: r2qk2r/pp3ppb/2pbp2p/8/2BP2Q1/2P1n1N1/PP3PPP/R3R1K1 w kq - 0 15

[Assistant] Qxg7


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

[User] 1. d4 Nf6 2. Nc3 d5 3. Bg5 e6 4. e4 Bb4 5. exd5 h6 6. Bxf6 Qxf6 7. dxe6 Bxe6

[Assistant] a3


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

[User] 1. d4 e6 2. e4 Nf6 3. Nc3 d5 4. Bg5 dxe4 5. Nxe4 Be7 6. Bxf6 gxf6 7. Nf3 a6 8. Bd3 f5

[Assistant] Ned2


[System] You are a chess 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 d6 3. Bg2 Nc6 4. Nf3 Bd7 5. O-O Qc8 6. Re1 Bh3 7. Bh1 h5

[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: 7R/1K3p2/6k1/PP6/6p1/6rp/8/8 w - - 0 48

[Assistant] a6


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

[User] 1. d4 h5 2. Nf3 a6 3. Bg5 b5 4. Bh4 Bb7 5. c3 Nf6 6. Nbd2 c5 7. e3 e6 8. Be2 Nc6 9. O-O Be7 10. dxc5 Bxc5 11. Bxf6 gxf6 12. Ne4 Be7 13. Nd6+ Bxd6 14. Qxd6 h4 15. Rad1 h3 16. g3 Ne7 17. Nd4 Qb8 18. Qxb8+ Rxb8 19. Bf3 Bxf3 20. Nxf3 d5 21. Rd2 f5 22. Rfd1 Nc6 23. Nd4 Ne5 24. Re2 Kd7 25. Kf1 Rhc8 26. f4 Nc6 27. Nxc6 Rxc6 28. Kf2 b4 29. cxb4 Rxb4 30. Rdd2 a5 31. Kf3 Rb5 32. g4 fxg4+ 33. Kxg4 Rc1 34. Kxh3 Ra1 35. a3 Rb1 36. Kg2 a4 37. h4 Rb3 38. h5 Rc1 39. h6 Rc8 40. Kf3 Rh8 41. Rh2 Ke7 42. Rdg2 Kf6 43. h7 d4 44. Rg8 Rxe3+ 45. Kg4 Rxh7 46. Rxh7 d3 47. Rh2 Re2 48. Rh3 d2 49. Rd3 Rg2+ 50. Kf3 Rxg8 51. Rxd2 Rb8 52. Ke4 Rb3 53. Kd4 Rf3 54. Ke4 Rb3 55. Rc2 Kg6 56. Rg2+ Kf6 57. Rc2

[Assistant] Ke7


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

[User] 1. d4 f5 2. e4 Nf6 3. Nc3 fxe4 4. f3 exf3 5. Nxf3 g6 6. Bg5 Bg7 7. Bc4 e6 8. O-O O-O 9. Ne5 Nc6 10. Nxc6 bxc6 11. Qd2 Qe7 12. Bh6 d5 13. Bd3 c5 14. 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: r1bqk2r/pp3ppp/2p5/2bpN3/2BQR3/8/PPP2PPP/RNB3K1 b kq - 0 9

[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: 5R2/5N1p/1k4p1/5n2/P7/8/3pq1PP/3N2RK b - - 7 36

[Assistant] Ng3+


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

[User] FEN: Q7/p3kppp/3p3q/3Bp3/4P3/2Pb1P1N/P5PP/R3K2R b KQ - 0 21

[Assistant] Qe3+


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

[User] 1. g3 h5 2. Bg2 d6 3. h4 g5 4. Nf3 gxh4 5. Nxh4 Nf6 6. d4 Nc6 7. Bg5 e5 8. Bxf6 Qxf6 9. d5 Ne7 10. Nc3 Bg4 11. Nb5 O-O-O 12. Nxa7+ Kb8 13. Nb5 c6 14. a4 cxb5 15. axb5 b6 16. Qd2 e4 17. Ra6

[Assistant] Nxd5


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

[User] 1. d4 c5 2. dxc5 e6 3. Nc3 Bxc5 4. Ne4 Bb6 5. Nd6+ Kf8 6. b3

[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 d5 2. Nf3 Nf6 3. Bf4 e6 4. e3 c5 5. Bg3 Nc6 6. c3 Be7 7. Bd3 O-O 8. Nbd2 cxd4 9. exd4 g6 10. O-O Re8 11. Rc1 Bf8 12. Bb1 Bg7 13. Re1 a6 14. Bh4 b5 15. Qe2 Bb7 16. Qe3

[Assistant] Qb6


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

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Bd3 Nf6 7. O-O Nc6 8. Nb3 b5 9. f4 d6 10. Be3 Be7 11. Qf3 h5 12. e5 Nd7 13. exd6 Bxd6 14. Bxb5 Bb7 15. Rad1 Nd4 16. Bxd7+ Qxd7 17. Qf2 Nxb3 18. axb3 Qc6 19. f5 Kd8 20. Bc5 Qxg2+ 21. Qxg2

[Assistant] Bxg2


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

[User] FEN: 2r1k2r/5p2/3Qpp1p/2q5/8/8/5PPP/R2R2K1 w k - 1 25

[Assistant] Qxc5


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

[User] 1. e3 Nc6 2. d4 e5 3. Nf3 e4 4. Nfd2 f5 5. c4 Nf6

[Assistant] Be2


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

[User] 1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 4. Be2 Bxf3 5. Bxf3 e6

[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. d4 e5 2. Nf3 e4 3. Ng1 d5 4. e3 c6 5. c4 f5 6. Nc3 Nf6 7. f4 exf3 8. Nxf3 Bb4 9. cxd5 Nxd5 10. Bd2 O-O 11. Bc4 Be6 12. Qb3 Bxc3 13. bxc3 Qc7 14. O-O Nd7 15. Qb1 N7f6 16. Bb3 Kh8 17. Ng5 Bg8 18. Qxf5 g6 19. Qh3 Kg7 20. Nf3 Qd7 21. Be1 Qxh3 22. gxh3 Nxe3 23. Rf2 Nf5 24. Ne5 Ne4 25. Re2 Ng5 26. Rg2 Ne4 27. Bxg8 Nf6 28. Bb3 Ne3 29. Re2 Ned5 30. Ng4 Nf4 31. Rd2 N6h5 32. Bg3 Nxh3+ 33. Kg2 N3f4+ 34. Bxf4 Nxf4+ 35. Kh1 h5 36. Nf2 Rae8 37. Nd3 Ne2 38. Rg1 Nxc3 39. Rdg2 Rf6 40. Ne5 Kh7 41. Rxg6 Rxg6 42. Nxg6 Nd5 43. Ne5 Nf4 44. Bc2+ Kh6 45. Rf1 Kg5 46. h4+ Kxh4 47. Rxf4+ Kg5 48. Rf5+ Kh4 49. Kh2 Rf8 50. Nf3+ Kg4 51. Ne5+ Kh4 52. Rxf8 Kg5 53. Rf5+ Kh4 54. Rxh5+ Kxh5 55. Nd7 Kg5 56. Nc5 b6 57. Ne6+ Kf6 58. Nd8 c5 59. d5 Ke7 60. Nc6+ Kd6 61. Be4 a6 62. Kg3 b5

[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] 1. d4 b6 2. c4 c6 3. Nc3 d5 4. e4 dxe4 5. Nxe4 Bb7 6. Nf3 Nd7 7. Bd3 Ngf6 8. O-O g6 9. Re1 Bg7 10. Nd6+ Kf8 11. Nxb7 Qc7 12. Na5 bxa5 13. Qa4 h6 14. Bd2 g5 15. Bxa5 Qb7 16. b3 Re8 17. Ne5 Nxe5 18. dxe5 Nd7 19. Bc3 Nc5 20. Qa3 Nxd3 21. Re3 Nf4 22. Rd1 Ne6 23. Qb2 c5 24. g3 Kg8 25. Rd5 h5 26. Qc2 h4 27. Qf5 hxg3 28. fxg3 Qa6 29. Rf3 Rf8 30. Rf2 Qc6 31. Qg4 Rh6 32. Rf5 Qa6 33. Qe2 Qc6 34. Qf2 Rg6 35. Kf1 g4 36. Qd2 Nc7 37. Rd7 Qh1+ 38. Ke2 Qxh2+

[Assistant] Rf2


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

[User] 1. d4 c5 2. Nc3 cxd4 3. Qxd4 Nc6 4. Qa4 Nf6 5. Bg5 h6 6. Bxf6 exf6 7. O-O-O Be7 8. h4 Qb6 9. g4 Qxf2 10. Nf3 Qe3+ 11. Kb1 Qb6 12. Nd5 Qd8 13. Rd3 d6 14. Re3 Be6 15. Nf4 Qd7 16. Bg2 Bxg4 17. Nd4 Nxd4 18. Qxd4 O-O 19. Rg1 f5 20. Nd5 Bd8 21. Bf3 h5 22. Bxg4 fxg4 23. Nf4 Bf6 24. Qd3 g6 25. Nd5 Bg7 26. Re7 Qf5 27. e4 Qf3 28. Qxf3 gxf3 29. Rf1 Rae8 30. c3 Rxe7 31. Nxe7+ Kh7 32. Nd5 Re8 33. Rxf3 Rxe4 34. Rxf7 Rxh4 35. Rxb7

[Assistant] Kh6


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

[User] 1. e3 e6 2. c4 d5 3. d4 dxc4 4. Nc3 Nf6 5. Bxc4 Be7 6. Nf3 O-O 7. O-O b6 8. b3 Bb7 9. Bb2 Nbd7 10. Bd3 c5 11. Rc1 cxd4 12. e4

[Assistant] dxc3


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

[User] FEN: 7k/p3r1pp/3q3r/2p5/Q7/1NP2P2/PP4P1/R4RK1 b - - 0 24

[Assistant] Qh2+


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

[User] FEN: 1k1r4/pp4p1/5nn1/2p1pQ2/3pP3/3P2PB/1PPB4/1q1K3R w - - 2 26

[Assistant] Bc1


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

[User] FEN: 4b1k1/3rb3/p1nBpn1p/2N3p1/8/5NP1/PP3PBP/3R2K1 b - - 2 24

[Assistant] Rxd6


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

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 e5 6. Nge2 O-O 7. Be3 c6 8. dxe5 dxe5 9. Bc5 Re8 10. Qxd8 Rxd8 11. Rd1 Rxd1+ 12. Kxd1 Be6 13. Nc1 Nfd7 14. Be3 a5 15. b3 Bf8 16. Kc2 Na6 17. Nd3 Nb4+ 18. Kb2 Nxd3+ 19. Bxd3 Bc5 20. Bxc5 Nxc5 21. Rd1 Rd8 22. Bc2 Rxd1 23. Bxd1 Kf8 24. Bc2 Ke7 25. a3 Bc8 26. b4 axb4 27. axb4 Ne6

[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: r1bq1rk1/ppp1bppp/3p1n2/n2Np1B1/2B1P3/3P1N2/PPP2PPP/R2Q1RK1 b - - 6 8

[Assistant] Nxd5


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

[User] FEN: 4r2k/2q3p1/5bBp/p1p5/8/PPpP2P1/2P2PK1/4R3 w - - 0 37

[Assistant] Rxe8#


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

[User] 1. d4 c6 2. c4 d5 3. Nc3 Nf6 4. cxd5 cxd5 5. Nf3 e6 6. g3 a6 7. Bg2 Be7 8. O-O O-O 9. Ne5 b5 10. Bf4 Bb7 11. a3 Nbd7 12. Qd2 Rc8 13. Nxd7 Nxd7 14. Nd1 Nb6 15. Ne3 Nc4 16. Nxc4 bxc4 17. Rac1 Qb6 18. Be3 Bd6 19. b3 Qxb3 20. Rb1 c3 21. Rxb3 cxd2

[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 d6 2. Nf3 g6 3. Bg5 Bg7 4. Bh4 Nf6 5. e3 Nh5 6. Bc4 Nf6 7. Bb3 O-O 8. Nbd2 c5 9. O-O cxd4 10. exd4 Nc6 11. c3 Na5 12. Re1 Nxb3 13. axb3 Bg4 14. Qe2 Bxf3 15. Nxf3 Qd7 16. Qxe7 Qxe7 17. Rxe7 Nd5 18. Rxb7 Rfe8 19. h3 Rab8 20. Raxa7 Rxb7 21. Rxb7 h6 22. Bg3 f5 23. Bxd6 g5 24. Be5 Bf6 25. Bxf6 Nxf6 26. Ne5 Ne4 27. b4 Ra8 28. b5 Ra1+ 29. Kh2 f4 30. h4 Nxf2 31. g3 fxg3+ 32. Kxg3 Ne4+ 33. Kg4 Nf6+ 34. Kf5 Rf1+ 35. Kg6 Kf8 36. Rf7+ Ke8 37. Rxf6 Rxf6+ 38. Kxf6 gxh4 39. Ng4 h3 40. b6 Kd7 41. c4 Kc6 42. c5 h5 43. Nh2 h4 44. d5+ Kb7 45. d6 Kc8 46. c6 Kb8 47. d7

[Assistant] Ka8


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

[User] 1. d4 Nf6 2. c4 b6 3. Nc3 Bb7 4. e4 Nxe4 5. Nf3 Nxc3 6. bxc3 d5

[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. d3 c5 2. g3 d5 3. Bg2 Nf6 4. Nf3 e6 5. O-O Nc6 6. Nbd2 Bd6 7. b3 O-O 8. Bb2 b6 9. Re1 Bb7 10. c4 Re8 11. e4 d4 12. e5 Nxe5 13. Nxe5 Bxg2 14. Kxg2 Qc7

[Assistant] f4


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

[User] FEN: 2b5/6pk/3Q4/4R3/1r3q2/1P6/P7/1K6 w - - 3 33

[Assistant] Rh5+


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

[User] 1. e4 d6 2. f4 Nf6 3. e5 dxe5 4. fxe5 Nd5 5. Nf3

[Assistant] Bg4


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

[User] 1. e4 c5 2. Nc3 e6 3. Nf3 Be7 4. d4 d6 5. dxc5 dxc5 6. Qxd8+ Bxd8 7. Be3 Be7 8. O-O-O Nf6 9. Nb5 Na6 10. e5 Nd5 11. Bd2 Bd7 12. Nc3 Bc6 13. Ne4 Nac7 14. Nd6+ Bxd6 15. exd6 Nb5 16. c4 Nxd6 17. cxd5 Bxd5 18. Bc3 O-O 19. Kb1 Ne4 20. Be1 Rfd8 21. Rc1 b5 22. Ne5 c4 23. f3 Nc5 24. Bb4 Na6 25. Bc3 f6 26. Ng4 h5 27. Nf2

[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 d5 2. Nc3 d4 3. Nb1 c5 4. Nf3 Nc6 5. c3 Bg4 6. cxd4

[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 g6 2. d4 Bg7 3. c3 c5 4. Nd2 cxd4 5. cxd4 Bxd4 6. Ngf3 Bg7 7. Bc4 d6 8. Qb3 e6 9. O-O Nc6 10. Rd1 Nge7 11. Nf1 O-O 12. Be2 Qc7 13. Bf4 e5 14. Bg5 Be6 15. Qc2 Rac8 16. Rac1 h6 17. Be3 f5 18. exf5 gxf5 19. a3 f4 20. Bd2 Nf5 21. Bc4 Qf7 22. Bxe6 Qxe6 23. Bc3 Ncd4 24. Qe4 d5 25. Qe1 Nxf3+ 26. gxf3 Qg6+ 27. Kh1 Nh4 28. Ng3 fxg3 29. fxg3

[Assistant] Nxf3


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

[User] 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Ng5 Ngf6 6. Bd3 g6 7. h4 Bg7 8. h5 h6 9. Nxf7 Kxf7 10. hxg6+ Kf8 11. Nf3 Nb6 12. Qe2 Bg4 13. Bd2 Qd5 14. Bb4 Qe6 15. Qxe6 Bxe6 16. O-O-O Bc4 17. Rde1 Nfd5 18. Bxc4 Nxc4 19. Bd2 Nxd2 20. Kxd2 Rd8

[Assistant] c3


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

[User] FEN: 8/1p6/2b2kp1/p6p/P1P1BP1P/1P1p1K2/8/8 w - - 0 38

[Assistant] Bxc6


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

[User] 1. d4 c5 2. c4 cxd4 3. Qxd4 Nc6 4. Qd1 Nf6 5. Nf3 g6 6. g3 Bg7 7. Bg2 O-O 8. Nc3 d6 9. Bf4 a6 10. e3 Be6 11. O-O Bxc4 12. Re1 Rc8 13. Rc1 b5 14. b3 Be6 15. Ng5 Bg4 16. f3 Bd7 17. e4 h6 18. Nh3 Qb6+ 19. Be3 Qa5 20. Nf2 Rfd8 21. Ng4 Nxg4 22. fxg4 Bxc3 23. Bxh6

[Assistant] Bxe1


[System] You are a chess 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/p1p4p/2p3p1/3pN2P/3Pn1Q1/2P5/PP3qPK/R7 b - - 0 27

[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] FEN: 8/5pk1/2p5/2PpR1n1/3P2qp/4Qp1p/P4P1P/5B1K b - - 9 41

[Assistant] Qg2+


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

[User] FEN: 8/6p1/4p2p/5k2/3P4/rK3P2/6PP/8 w - - 0 41

[Assistant] Kxa3


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

[User] 1. b4 Nf6 2. Bb2 g6 3. Bxf6 exf6 4. a3 Bg7 5. c4 h5 6. Nc3 h4

[Assistant] e3


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

[User] 1. e4 c5 2. g3 d6 3. Nc3 Nc6 4. Bg2 g6 5. d3 Bg7 6. f4 Nf6 7. Nf3 O-O 8. h3 Rb8 9. O-O b5 10. Rb1 b4 11. Ne2 Nd7 12. Be3 a5 13. g4 Ba6 14. Ng3 c4 15. d4 c3 16. d5 Bxf1 17. Bxf1 Nce5 18. fxe5 Nxe5 19. Nxe5 Bxe5 20. Ne2 cxb2 21. Bd4 Bxd4+ 22. Qxd4 Qc7 23. Rxb2 Rfc8 24. Nf4 Qc5 25. Qxc5 Rxc5 26. Kf2

[Assistant] Rbc8


[System] You are a chess grandmaster. 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. cxd5 Bxf3 5. gxf3 Qxd5 6. e3 e5 7. Nc3 Bb4 8. Bd2 Bxc3 9. bxc3 Nf6 10. c4 Qd6 11. d5 Ne7 12. Rb1 b6 13. Bb4 c5 14. dxc6 Qxc6 15. Rg1 Ng6 16. Qd6 Qxd6 17. Bxd6 O-O-O 18. c5 Rhe8 19. Ba6+ Kd7 20. Bb5+

[Assistant] Ke6


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

[User] 1. d4 e5 2. Nf3 d6 3. dxe5 Nc6 4. exd6 Bxd6 5. e4 Nf6 6. Nc3 Qe7 7. Bd3 Bg4 8. h3 Bh5 9. Be3 O-O-O 10. g4 Bg6 11. g5 Nxe4 12. Nd5 Qe8 13. Qe2 Qe6 14. c4 Ne7 15. O-O-O Nxd5 16. cxd5 Qxd5 17. Kb1 Qe6

[Assistant] Nd4


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

[User] FEN: q6k/5p1p/p3rp2/1p6/5P1Q/1P3b1P/P1R3BK/8 w - - 0 33

[Assistant] Qh6


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

[User] 1. g3 Nf6 2. f3 g6 3. Nh3 Bg7 4. Nf2 O-O 5. Bg2 e5 6. O-O d5 7. d3 Nc6 8. e4 d4 9. Nd2 Nh5 10. a4 f5 11. g4 fxg4 12. fxg4 Nf4 13. Nc4 Qh4 14. Qf3 Nb4 15. Na3 h5 16. gxh5 gxh5 17. Bxf4 Rxf4 18. Qg3 Qxg3 19. hxg3 Rf7 20. c3 Nc6 21. Nc4 Be6 22. Bh3 Bxc4 23. dxc4 Kh7 24. Bf5+ Kh6 25. Nd3 Rd8 26. Nc5 dxc3 27. bxc3 b6 28. Nb3 Rd3 29. Kg2 Rxc3 30. Rf3 Rc2+ 31. Kh3 Rxc4 32. a5 b5 33. a6 Nd4 34. Nxd4 Rxd4 35. Rb3 c6 36. Rc1 Rf6 37. Rbc3 b4 38. Rxc6 b3 39. Rxf6+ Bxf6 40. Rb1 Rb4 41. Kg2 b2 42. Kf3 Bg5 43. Ke2 Bc1 44. Kd3 Ra4 45. Bc8 Ra3+ 46. Kc4 Rxg3 47. Kd5 Rc3 48. Bb7 Ra3 49. Kxe5 Ra1 50. Rxb2 Bxb2+ 51. Kd6 Re1 52. e5 Bxe5+ 53. Kd5 Bd4 54. Kc6 Bb6 55. Kd7 Ra1 56. Kc8 h4 57. Kb8 h3 58. Bc8 h2 59. Bb7 Rxa6 60. Bd5 h1=Q 61. Bxh1 Ra5 62. Bb7 Rc5 63. Bc8 Rc7 64. Bb7 Rxb7+ 65. Kxb7 Kg7 66. Ka6 Kf6 67. Kb5 Ke5

[Assistant] Ka4


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

[User] 1. f4 d5 2. Nf3 c5 3. g3 Nc6 4. Bg2 g6 5. O-O Bg7 6. d3 Nf6 7. Nbd2 O-O 8. e4 dxe4 9. dxe4 c4 10. c3 b5 11. a4 b4 12. Nxc4 bxc3 13. bxc3 Qc7 14. e5 Ng4 15. Ng5 Ba6 16. Qxg4 Bxc4 17. Re1 h5 18. Qf3 Rac8 19. g4 hxg4 20. Qxg4 Bd3 21. Ba3 Rfd8 22. Qh4

[Assistant] Qd7


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

[User] 1. e4 Nf6 2. Nc3 d5 3. e5 d4 4. exf6 dxc3 5. fxg7 Bxg7 6. dxc3 Qxd1+ 7. Kxd1 Nc6 8. Bf4 Bf5 9. Bb5 O-O-O+ 10. Kc1 Ne5 11. f3 a6 12. Ba4 Nc4 13. Bb3 b5 14. Bxc4 bxc4 15. Ne2 e5 16. Be3 Be6 17. a4

[Assistant] f5


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

[User] FEN: 5r2/1p3rbk/2p3pp/2Pp4/p2P1q2/P5RP/4RPp1/BB1Q2K1 b - - 7 32

[Assistant] Qxg3


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

[User] FEN: 2b2r2/6kp/p5p1/3B1p2/3pP3/P2K4/1PP3PP/5R2 b - - 1 25

[Assistant] fxe4+


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

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 d6 5. f3 Nf6 6. c4 Be7 7. Nb3 O-O 8. Nc3 d5 9. cxd5 exd5 10. e5 Nfd7 11. f4 Nc5 12. Qxd5 Qb6 13. Be3 Nbd7 14. Na4 Qb4+ 15. Nc3 Nb6 16. Bxc5 Qxc3+ 17. bxc3 Nxd5

[Assistant] Bxe7


[System] You are a chess grandmaster. 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 g6 4. b3 b6 5. Bb2 Bg7 6. Bd3 O-O 7. c4 Bb7 8. Nc3 d6 9. d5 e6 10. dxe6 fxe6

[Assistant] Qe2


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

[User] FEN: 8/4Q2p/4pppk/5q2/3p4/6PP/5PK1/8 w - - 0 37

[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. d4 d6 2. c4 e5 3. Nf3 e4 4. Nfd2 f5 5. Nc3 Nf6 6. Nb3 g6 7. Bg5 Bg7 8. Qd2 h6 9. Bxf6 Bxf6 10. e3 c6 11. h4 Nd7 12. Ne2 Nb6 13. Nf4 Kf7 14. c5 dxc5 15. Nxc5 Nd5 16. Bc4

[Assistant] Kg7


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

[User] 1. d4 Nf6 2. Bg5 Ne4 3. Bf4 d5 4. e3 Nc6 5. Bd3 e6 6. Nd2 Nxd2 7. Qxd2 Nb4 8. 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. e4 e5 2. Nc3 Nc6 3. f4 Nf6 4. fxe5 Nxe5 5. d4 Ng6 6. e5 d5 7. exf6 Qxf6 8. Nf3 c6 9. Bg5 Bd6

[Assistant] Bxf6


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

[User] 1. d4 Nf6 2. g3 d5 3. Bg2 e6 4. Nf3 Be7 5. O-O O-O 6. c4 dxc4 7. Nc3 Nc6 8. Ne5 Nxd4 9. Nxc4 c5 10. Be3 Rb8 11. Bxd4 cxd4 12. Nb5 Bc5 13. a3 a6 14. Nbd6 Bxd6 15. Qxd4 Be7 16. Qf4 Bd7 17. Rfd1 Qe8 18. Rac1 Nd5 19. Qd4 Bc6 20. Ne5 Bf6 21. f4 Bxe5 22. Qxe5 Qe7 23. Bxd5 Bxd5 24. Rxd5 Qf6 25. Qxf6 gxf6 26. Rd6 Rfd8 27. Rcd1 Rxd6 28. Rxd6 Rc8 29. Rd7 b5 30. Ra7 Rc2 31. Rxa6 Rxb2 32. Kf2 Kg7 33. Ra5 f5 34. a4 bxa4 35. Rxa4 Kf6 36. Rd4 Rb3 37. Rd3 Rb4 38. Re3 h5

[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: 6k1/1p1q2pp/p4p2/P4p2/b2p1P2/Q3RNP1/1P3PKP/3r4 w - - 0 30

[Assistant] Re7


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

[User] FEN: 2Q5/kp2p3/1Rp1P2p/P5p1/8/3r1PKP/6P1/4q3 w - - 1 38

[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 e6 2. d4 d5 3. Nc3 Bb4 4. exd5 exd5 5. Bd3 Nf6 6. Ne2 O-O 7. O-O Bg4 8. Bf4 c6 9. Qd2 Bd6 10. Rae1 Bh5 11. Ng3 Bg6 12. Nf5 Bxf5 13. Bxf5 Qc7 14. Ne2 Nbd7 15. Bxd6 Qxd6 16. Qf4 Qxf4 17. Nxf4 Rfe8 18. c3 g5 19. Nd3 Kg7 20. f3 h6 21. Kf2 b6 22. Kg3 a5 23. h4 Nh5+ 24. Kg4 Ndf6+ 25. Kh3 Nf4+ 26. Nxf4 gxf4 27. Re5 Nh5 28. Rfe1 Rxe5 29. Rxe5 Ng3 30. Kg4 f6 31. Re7+ Kf8

[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 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. c3 c5 6. Bd3 Nc6 7. Ne2 Qb6 8. Nf3 Be7 9. O-O a5 10. a4 cxd4 11. cxd4 Nb4 12. Bb1 Nb8 13. Nc3 Bd7 14. Ra3 Qa6 15. Re1 b5 16. axb5 Bxb5 17. Nxb5 Qxb5 18. Nd2 N8c6 19. Rg3 g6 20. Nf3 h5 21. h4 Rc8 22. Ng5 Bxg5 23. Bxg5 Ne7 24. Bf6 Rh7 25. Rc3 Rc4 26. Qc1 Nec6 27. Rxc4

[Assistant] dxc4


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

[User] 1. d4 e6 2. c3 Nf6 3. Nd2 c5 4. e4 cxd4 5. e5 dxc3 6. exf6 cxd2+ 7. Qxd2 Qxf6 8. Nf3 h6 9. Qd1 Nc6 10. Be3 Bb4+ 11. Bd2 Qxb2

[Assistant] Rb1


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

[User] FEN: 4r1k1/1q3ppp/3B1n2/p2P4/8/PQ5P/5PPN/1R4K1 b - - 0 27

[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. Nf3 g6 3. c3 Bg7 4. d4 Qa5 5. e5 cxd4 6. Bf4 Nc6 7. Qe2 d3 8. Qe4 Qb6 9. Bc1 f5 10. Qf4 Bh6 11. Ng5 d6 12. exd6 e5 13. Qh4 e4 14. Nd2 Ne5 15. Ndxe4 fxe4 16. Qxe4 Qxd6 17. f4 Nf6 18. Qxe5+ Qxe5+ 19. fxe5 Ng4 20. Bxd3 O-O 21. Bc4+ Kg7

[Assistant] Nf3


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. h3 Bg7 7. g4 Nc6 8. Nde2

[Assistant] h5