Chess puzzle (Checkmate)
Moves: 1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. d4 c5 5. Nbd2 Nf6 6. Qe2+ Be6 7. Ng5 Qd6 8.
Qb5+ Qd7 9. dxc5 Qxb5 10. Bxb5+ Nc6 11. Nxe6 fxe6 12. Nb3 a6 13. Bxc6+ bxc6 14.
Bf4 Ne4 15. Be3 Rb8 16. f3 Nf6 17. O-O-O Be7 18. Na5 Kd7 19. b4 Kc7 20. Bf4+
Kd7 21. Bxb8 Rxb8 22. a3 Kc7 23. h4 Nd7 24. f4 Nf6 25. Rhe1 Ne4 26. Rh1 Nf2 27.
g3 Nxd1 28. Kxd1 Bf6 29. Kc1 e5 30. fxe5 Bxe5 31. Re1 Re8 32. Rf1 Bxg3 33. Rf7+
Kc8 34. Rxg7 Re1+ 35. Kd2 Bxh4 36. Rxh7 Rh1 37. Ra7 Bg5+ 38. Kd3 Ra1 39. Rxa6
Rxa3+ 40. Kd4 *
Position (FEN): 2k5/8/R1p5/N1Pp2b1/1P1K4/r7/2P5/8 b - - 1 40
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1880
Best move: Bf6#