Chess puzzle (Checkmate)
Moves: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d3 g6 5. Nf3 Bg7 6. d4 Nf6 7. Be3 Bg4 8.
Be2 c6 9. O-O O-O 10. Ne5 Bxe2 11. Qxe2 Nbd7 12. Nf3 Qb6 13. Rab1 Qc7 14. Rfe1
Ng4 15. g3 Nxe3 16. Qxe3 e6 17. Ne4 b5 18. c3 a5 19. a3 Nb6 20. Ned2 Na4 21.
Kg2 Rad8 22. Kg1 Nb6 23. b4 a4 24. Kg2 h6 25. Kg1 Nd5 26. Qd3 Nb6 27. Qc2 Qd6
28. Rbd1 Qd5 29. Ne5 Nc4 30. Ndxc4 bxc4 31. Qe2 Bxe5 32. Qxe5 Qxe5 33. Rxe5 Rd5
34. Rde1 Rfd8 35. Kg2 Kg7 36. Kf3 Kf6 37. Kg4 h5+ 38. Kf4 R8d6 39. g4 hxg4 40.
Kxg4 Rxe5 41. Rxe5 Rd5 42. f4 Kg7 43. h4 f6 44. Rxe6 g5 45. hxg5 fxg5 46. fxg5
c5 47. bxc5 Rxc5 48. Ra6 Rb5 49. Rxa4 Rb3 50. Rxc4 Rxa3 51. Rc5 Ra4 52. Kf5 Ra1
53. Ke4 Kg6 54. Kd3 Ra4 55. Kc2 Ra3 56. Kb2 Ra8 57. Kb3 Rb8+ 58. Kc4 Rb1 59. d5
Rd1 60. Kb4 Kxg5 61. c4 Kf6 62. Rc6+ Ke7 63. Re6+ Kd7 64. Kc5 Ra1 65. Rd6+ Kc7
66. Rc6+ Kd7 67. Kb5 Rb1+ 68. Ka6 Rb8 69. Ka7 Rb1 70. Rb6 Rc1 71. Rb4 Kd6 72.
Kb6 Rc2 73. Kb5 Rc1 74. Kb6 Rc2 75. Ka5 Kc5 76. Rb5+ Kxc4 77. d6 Rd2 78. Rb6 *
Position (FEN): 8/8/1R1P4/K7/2k5/8/3r4/8 b - - 2 78
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 1440
Best move: Ra2#