Chess puzzle (Checkmate)
Moves: 1. d4 e6 2. Bf4 d5 3. Nc3 Bd6 4. e3 Nf6 5. Nf3 O-O 6. Bd3 Bxf4 7. exf4 Nbd7 8.
O-O c5 9. dxc5 Nxc5 10. Ne5 Qc7 11. g3 Bd7 12. a3 Nxd3 13. Qxd3 Rac8 14. Nxd7
Nxd7 15. Rfc1 a6 16. Ne2 Nc5 17. Qd4 Ne4 18. f3 Nd6 19. c3 Qc5 20. Qxc5 Rxc5
21. Kg2 Rfc8 22. Nd4 Nc4 23. Rab1 Nd2 24. Ra1 Nc4 25. Rab1 h6 26. Kf2 a5 27. b4
axb4 28. axb4 R5c7 29. Nb5 Rd7 30. Ra1 Nd6 31. Nxd6 Rxd6 32. Ra7 b5 33. Ke3
Rdc6 34. Kd4 Kf8 35. Ra5 Rc4+ 36. Kd3 Rxb4 37. cxb4 Rxc1 38. Rxb5 Ke7 39. Rb7+
Ke8 40. b5 Rb1 41. b6 Kd8 42. Rb8+ Kd7 43. Kc2 Rb5 44. Rb7+ Kc6 45. Rxf7 Rxb6
46. Rxg7 Kc5 47. Rg6 h5 48. Rg5 Kc4 49. Rxh5 d4 50. f5 e5 51. f6 d3+ 52. Kd2
Rb2+ 53. Kd1 Kc3 54. Ke1 d2+ 55. Kd1 Kd3 56. Rxe5 *
Position (FEN): 8/8/5P2/4R3/8/3k1PP1/1r1p3P/3K4 b - - 0 56
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 650
Best move: Rb1#