Chess puzzle (Checkmate)
Moves: 1. Nf3 e6 2. e3 d5 3. d4 Nf6 4. c4 Be7 5. Nbd2 O-O 6. a3 c6 7. b4 b6 8. Bb2 Bb7
9. Be2 c5 10. dxc5 bxc5 11. b5 a6 12. a4 axb5 13. axb5 Nbd7 14. O-O Nb6 15. Qb3
Ne4 16. Nxe4 dxe4 17. Ne5 f6 18. Nc6 Qc7 19. Nxe7+ Qxe7 20. h3 Rfd8 21. Rfd1
Rxd1+ 22. Rxd1 Na4 23. Ba1 e5 24. Bg4 Nb6 25. h4 Qf7 26. Be2 h5 27. g3 Kh7 28.
Kg2 g6 29. Qc2 Kh6 30. Qd2 Nxc4 31. Qc3 Nb6 32. Qxc5 Na4 33. Qd6 Rc8 34. Qd7
Qxd7 35. Rxd7 Ba8 36. Ra7 Nb6 37. Rf7 Nd5 38. b6 Rc2 39. Bf1 Nxe3+ 40. Kg1 Nxf1
41. Kxf1 Rc1+ 42. Kg2 Rxa1 43. b7 Bxb7 44. Rxb7 Ra2 45. Kf1 g5 46. hxg5+ Kxg5
47. Rg7+ Kf5 48. Ke1 Rb2 49. Kf1 e3 50. fxe3 Ke4 51. Rg6 f5 52. Rg5 Kxe3 53.
Rxf5 e4 54. Rxh5 Kf3 55. Ke1 e3 56. Rg5 *
Position (FEN): 8/8/8/6R1/8/4pkP1/1r6/4K3 b - - 1 56
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 1134
Best move: Rb1#