Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Bc4 e6 3. Nf3 Nc6 4. O-O g6 5. d3 Bg7 6. Bf4 Bxb2 7. Nbd2 Bxa1 8.
Qxa1 Qf6 9. Qxf6 Nxf6 10. Bb5 O-O 11. Nc4 a6 12. Bxc6 bxc6 13. Nce5 Rb8 14. Bh6
Re8 15. Ng5 Rb2 16. Ngxf7 Rxc2 17. Nd6 Rd8 18. Nef7 Rf8 19. Bxf8 Kxf8 20. Ra1
Rd2 21. Ne5 Rc2 22. Nxc8 c4 23. Nxc4 d5 24. exd5 cxd5 25. Ne3 Rd2 26. Kf1 Rxd3
27. Ke2 Rc3 28. Nd6 Ke7 29. Nb7 h5 30. Kd2 Rc7 31. Na5 Ne4+ 32. Ke2 d4 33. Ng4
Rc2+ 34. Kd3 Rc5 35. Kxe4 Rxa5 36. Nh6 Kf6 37. Kxd4 Rd5+ 38. Ke4 Re5+ 39. Kf4
Rd5 40. Ng8+ Kf7 41. Nh6+ Kg7 42. Re1 Kxh6 43. Rxe6 Rf5+ 44. Ke3 Ra5 45. f4
Rxa2 46. f5 Rxg2 47. Rxa6 Rxh2 48. Rxg6+ Kh7 49. Re6 Rh4 50. f6 Rh3+ 51. Kf4
Ra3 52. Re7+ Kg8 53. f7+ Kf8 54. Rb7 Ra4+ 55. Kf5 h4 56. Kf6 h3 *
Position (FEN): 5k2/1R3P2/5K2/8/r7/7p/8/8 w - - 0 57
White to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 699
Best move: Rb8#