Chess puzzle (Checkmate)
Moves: 1. d4 c6 2. c4 d5 3. Nf3 Nf6 4. Nc3 Bf5 5. Nh4 Bg6 6. Nxg6 hxg6 7. Qb3 Qd7 8.
Bf4 e6 9. e3 b6 10. cxd5 exd5 11. Bd3 Bd6 12. Bxd6 Qxd6 13. h3 Nbd7 14. a4 c5
15. dxc5 Nxc5 16. Bb5+ Kf8 17. Qd1 Nfe4 18. Qxd5 Qxd5 19. Nxd5 Rd8 20. Nc3 Nxc3
21. bxc3 Ke7 22. Ke2 Ne4 23. Kf3 Nxc3 24. Rac1 Nxb5 25. axb5 Rd7 26. Rc4 Rh5
27. Rb1 Rf5+ 28. Ke2 Rfd5 29. Rb2 f6 30. Rg4 Kf7 31. Ra4 f5 32. Rba2 Rxb5 33.
Rxa7 Rxa7 34. Rxa7+ Kf6 35. Rb7 Rb2+ 36. Kf3 b5 37. g4 fxg4+ 38. hxg4 b4 39.
Kg3 b3 40. f4 Rb1 41. Rb6+ Kf7 42. Kf3 b2 43. Ke4 Ke7 44. f5 gxf5+ 45. gxf5 Kf7
46. Rb3 Kf6 47. Rb6+ Ke7 48. Re6+ Kf7 49. Rb6 Ke7 50. Ke5 Kf7 51. Rb7+ Ke8 52.
e4 Kf8 53. Ke6 g5 54. fxg6 Rg1 55. g7+ Rxg7 *
Position (FEN): 5k2/1R4r1/4K3/8/4P3/8/1p6/8 w - - 0 56
White to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 1656
Best move: Rb8#