Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 g6 3. Bf4 Bg7 4. Nf3 O-O 5. Qd2 d6 6. Bh6 Nbd7 7. Bxg7 Kxg7 8.
Nc3 c5 9. d5 Nb6 10. e4 e6 11. Be2 exd5 12. exd5 Re8 13. O-O Bg4 14. b3 Qe7 15.
Rae1 Ne4 16. Nxe4 Qxe4 17. Bd3 Qxe1 18. Rxe1 Bxf3 19. Rxe8 Rxe8 20. gxf3 Nd7
21. f4 Nf6 22. h3 a6 23. Qa5 Nh5 24. Qd2 Rb8 25. Kg2 b5 26. Kf3 b4 27. Qe2 Nf6
28. Qe7 Ne8 29. Qa7 Rd8 30. Qxa6 Kg8 31. Qb6 Ra8 32. Bb1 Kf8 33. Kg4 h5+ 34.
Kg5 Kg7 35. Qc6 f6+ 36. Kh4 Rd8 37. Qb7+ Kh6 38. Qe7 Rb8 39. Qe3 Ng7 40. f5+
g5+ 41. Kg3 h4+ 42. Kg4 Re8 43. Qd3 Re5 44. f4 gxf4 45. Kxf4 Rxf5+ 46. Kg4 Re5
47. Qd2+ Rg5+ 48. Kxh4 Nh5 49. Be4 Kg7 50. Bf3 Ng3 51. Qe3 *
Position (FEN): 8/6k1/3p1p2/2pP2r1/1pP4K/1P2QBnP/P7/8 b - - 6 51
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 880
Best move: Nf5#