Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 d6 3. d4 Nc6 4. dxe5 dxe5 5. Qxd8+ Kxd8 6. Bc4 f6 7. Be3 Bd7 8.
Nc3 Bd6 9. O-O-O a6 10. Na4 Ke7 11. Nc5 Rb8 12. Nxd7 Kxd7 13. a4 Rd8 14. c3 Kc8
15. Kc2 Nge7 16. b4 Kb8 17. Rb1 Ng6 18. g3 Rhf8 19. Nh4 Nxh4 20. gxh4 g6 21.
Bd5 Ne7 22. c4 Nxd5 23. exd5 e4 24. h3 f5 25. Bg5 Rc8 26. f4 c6 27. c5 Bc7 28.
d6 Bd8 29. d7 Rc7 30. Rbd1 Ka7 31. Rd6 b6 32. cxb6+ Kxb6 33. Rhd1 Ra7 34. Re6
Ra8 35. Re8 Bxg5 36. Rxa8 Rxa8 37. hxg5 Rd8 38. h4 Kc7 39. h5 Rxd7 40. Rh1 Rd4
41. Kc3 Rd3+ 42. Kc4 Rf3 43. hxg6 hxg6 44. Rh7+ Kb6 *
Position (FEN): 8/7R/pkp3p1/5pP1/PPK1pP2/5r2/8/8 w - - 2 45
White to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 880
Best move: a5#