Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Rb1 cxd4 8.
cxd4 Nc6 9. Bb5 Bd7 10. Nf3 Bb4+ 11. Bd2 Bxd2+ 12. Qxd2 O-O 13. O-O Rb8 14. d5
exd5 15. exd5 Ne7 16. Bc4 b5 17. Bb3 Bf5 18. Rbc1 Qd6 19. Nd4 Be4 20. Nc6 Rb7
21. Nxe7+ Rxe7 22. Rc6 Qe5 23. Re1 Qb8 24. f3 Bxd5 25. Bxd5 Rd7 26. Qg5 h6 27.
Rxh6 Rxd5 28. Qxd5 gxh6 29. Qc6 Qb6+ 30. Qxb6 axb6 31. Rb1 Ra8 32. Rxb5 Rxa2
33. Rxb6 Kg7 34. h3 Ra4 35. Kh2 Rc4 36. Kg3 Rc2 37. Ra6 Rd2 38. h4 Rb2 39. Kh3
Rc2 40. Ra3 Rc1 41. g4 Rh1+ 42. Kg2 Rd1 43. Kg3 Rd2 44. Re3 Rd4 45. g5 hxg5 46.
hxg5 Rd1 47. f4 Rg1+ 48. Kf3 Kg6 49. Ra3 Rf1+ 50. Kg4 Rb1 51. Ra6+ Kg7 52. f5
Rb4+ 53. Kh5 Rb1 54. f6+ Kh7 55. Ra7 Rh1+ 56. Kg4 Kg6 57. Ra8 Rg1+ 58. Kf4 Re1
59. Rg8+ Kh5 60. Rg7 Rf1+ 61. Ke5 Re1+ 62. Kf5 Rf1+ 63. Ke5 Ra1 64. Rxf7 Kxg5
65. Rg7+ Kh6 66. Rg3 Re1+ 67. Kf5 Rf1+ 68. Ke6 Re1+ 69. Kf7 Rf1 70. Ke7 Kh7 71.
f7 Re1+ 72. Kf8 Rf1 73. Rh3+ Kg6 74. Rg3+ Kf6 75. Rg8 Ra1 76. Rh8 *
Position (FEN): 5K1R/5P2/5k2/8/8/8/8/r7 b - - 10 76
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 829
Best move: Ra8#