Chess puzzle (Checkmate)
Moves: 1. d4 e6 2. c4 d5 3. cxd5 exd5 4. Nc3 Nf6 5. e3 Bd6 6. Bd3 O-O 7. Nge2 Be6 8.
O-O c6 9. a3 Qd7 10. b4 Bf5 11. Ng3 Bxd3 12. Qxd3 Re8 13. Bd2 Qe6 14. b5 Nbd7
15. bxc6 bxc6 16. a4 c5 17. dxc5 Nxc5 18. Qf5 Nb3 19. Rad1 Rac8 20. Nb5 Bb8 21.
Bc3 Ne4 22. Qxe6 Rxe6 23. Bd4 Nxd4 24. Nxd4 Ra6 25. Ngf5 Kf8 26. Ra1 g6 27. Ng3
Nd2 28. Rfd1 Nc4 29. Nf3 Nb2 30. Rxd5 Rxa4 31. Rxa4 Rc1+ 32. Nf1 Nxa4 33. Rd8+
Kg7 34. Rxb8 Nb6 35. Rb7 Ra1 36. Ne5 Nd5 37. Nxf7 Nc3 38. g3 Ne2+ 39. Kg2 a5
40. Ne5+ Kf6 41. Nc4 a4 42. Ra7 Nc3 43. Nfd2 Nb5 44. Ra5 Nc7 45. f4 Ne6 46. Ra6
Ke7 47. Kf3 Nc5 48. Ra5 Nd3 49. e4 Ne1+ 50. Ke2 Nc2 51. e5 Nd4+ 52. Kd3 Nb3 53.
Ra8 Nc5+ 54. Kc3 Rc1+ 55. Kb2 Nd3+ 56. Ka3 *
Position (FEN): R7/4k2p/6p1/4P3/p1N2P2/K2n2P1/3N3P/2r5 b - - 10 56
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1105
Best move: Ra1#