Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. Bf4 Nc6 3. e3 Nf6 4. Nf3 Bf5 5. c4 e6 6. Nc3 Bb4 7. Bd3 Bxc3+ 8.
bxc3 Bxd3 9. Qxd3 O-O 10. cxd5 Nxd5 11. Ng5 g6 12. h4 Nce7 13. h5 Nf5 14. e4
Nxf4 15. Qe3 Nxg2+ 16. Ke2 Ngxe3 17. hxg6 Nxd4+ 18. cxd4 fxg6 19. Nxe6 Qf6 20.
Nxf8 Nc2 21. Nxh7 Nxd4+ 22. Ke3 Nc2+ 23. Kd2 Qc6 24. Rac1 Rd8+ 25. Ke2 Nd4+ 26.
Ke3 Nc2+ 27. Ke2 Qc4+ 28. Kf3 Rd3+ 29. Kf4 Qf7+ 30. Kg5 Nd4 31. Nf6+ Kf8 32.
Rh8+ Ke7 33. Rxc7+ Ke6 34. Rxf7 Kxf7 35. Rh7+ Ke6 36. Rxb7 Ra3 37. Kxg6 Rxa2
38. f4 Rg2+ 39. Kh5 Kxf6 40. Rxa7 Rh2+ 41. Kg4 Ne6 42. Ra6 Kf7 43. Kf5 Ng7+ 44.
Ke5 Rh5+ 45. f5 Ne8 46. Ra7+ Kf8 47. Kf4 Nd6 48. f6 Rh4+ 49. Ke5 Nxe4 50. Ke6
Rh6 *
Position (FEN): 5k2/R7/4KP1r/8/4n3/8/8/8 w - - 2 51
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1234
Best move: Ra8#