Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. Bf4 c6 3. e3 Bf5 4. c4 e6 5. Qb3 b6 6. Nc3 Nf6 7. Nf3 Bd6 8. Ne5
O-O 9. Bg3 Ne4 10. Nxe4 dxe4 11. Rd1 f6 12. c5 bxc5 13. Nc4 Bxg3 14. hxg3 Nd7
15. dxc5 Qc7 16. Nd6 Qa5+ 17. Qc3 Qxc3+ 18. bxc3 Nxc5 19. Bc4 Bg4 20. Rb1 Rab8
21. O-O Rxb1 22. Rxb1 Rd8 23. f3 exf3 24. gxf3 Bxf3 25. Nb7 Rd2 26. Nxc5 Bd5
27. Bxd5 exd5 28. Rb8+ Kf7 29. Rb7+ Ke8 30. Rxa7 Re2 31. Ne6 g6 32. a4 h5 33.
Nf4 Rxe3 34. Kf2 Rxc3 35. Nxg6 Rc2+ 36. Ke3 Rc3+ 37. Kf4 Rc4+ 38. Kf5 Rc3 39.
Kxf6 Kd8 40. Ne5 Rb3 41. Nxc6+ Kc8 42. Ke6 Rxg3 43. Kd6 Rg6+ 44. Kc5 Rg2 45. a5
d4 46. Rh7 Rg1 47. Rxh5 Kd7 48. Rd5+ Kc7 49. Nxd4 Rc1+ 50. Kb4 Rb1+ 51. Nb3 Kc6
52. Rc5+ Kb7 53. Rb5+ Kc7 54. Rb6 Rb2 55. Ka3 Rh2 56. Rb4 Kc6 57. Ka4 *
Position (FEN): 8/8/2k5/P7/KR6/1N6/7r/8 b - - 16 57
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 422
Best move: Ra2#