Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 d6 3. Nc3 Be7 4. d4 exd4 5. Qxd4 Nf6 6. Bb5+ Nc6 7. Bxc6+ bxc6
8. O-O O-O 9. h3 c5 10. Qd3 Be6 11. Nd5 Bxd5 12. exd5 Nd7 13. Qf5 Bf6 14. Bg5
Rb8 15. Bxf6 Nxf6 16. b3 Qd7 17. Qxd7 Nxd7 18. Rfe1 Rfe8 19. c4 a5 20. Kf1 Kf8
21. Rxe8+ Rxe8 22. Re1 Ra8 23. Rb1 Nb6 24. Ke2 Rb8 25. Kd3 Ra8 26. Nd2 Re8 27.
g4 g6 28. g5 Nd7 29. f4 f6 30. h4 Kg7 31. a3 Ra8 32. Ne4 f5 33. Nc3 Kf7 34. Nb5
Rc8 35. Na7 Re8 36. Nc6 Nb6 37. Nxa5 Ra8 38. b4 cxb4 39. axb4 Re8 40. Nc6 Re4
41. Nd4 Rxf4 42. Ra1 Rxh4 43. Ra7 Rh3+ 44. Ke2 Rh2+ 45. Kf3 Rh3+ 46. Kg2 Rd3
47. Rxc7+ Kg8 48. Ne6 Rc3 49. Rg7+ Kh8 50. Rb7 Nxc4 *
Position (FEN): 7k/1R5p/3pN1p1/3P1pP1/1Pn5/2r5/6K1/8 w - - 0 51
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 880
Best move: Rb8#