Chess puzzle (Checkmate)
Moves: 1. Nf3 d5 2. c4 c6 3. g3 Nf6 4. Bg2 Bf5 5. O-O e6 6. b3 h6 7. Bb2 Be7 8. d3 O-O
9. Ne5 Nbd7 10. Nd2 Nxe5 11. Bxe5 Nd7 12. Bc3 Bf6 13. Qc2 Bh7 14. Rfc1 a5 15.
a3 Nc5 16. Bxf6 Qxf6 17. Qc3 Qxc3 18. Rxc3 d4 19. Rcc1 e5 20. b4 axb4 21. axb4
Na4 22. Ne4 Bxe4 23. Bxe4 Nc3 24. Bf3 f5 25. Kf1 e4 26. Bg2 Rfe8 27. h4 g5 28.
hxg5 hxg5 29. g4 fxg4 30. dxe4 Rxa1 31. Rxa1 Nxe4 32. Ra7 Nd2+ 33. Ke1 Nxc4 34.
Rxb7 Ne5 35. Kd2 Rf8 36. Re7 Rxf2 37. Rxe5 Rxg2 38. Rxg5+ Kf7 39. Kd3 Ke6 40.
Kxd4 Rxe2 41. Rxg4 Kd6 42. Rg6+ Kc7 43. Kc5 Re5+ 44. Kc4 Kb6 45. Rh6 Re4+ 46.
Kc3 Rg4 47. Rf6 Kb5 48. Rf5+ Kb6 49. Kb3 Re4 50. Ka4 Re1 51. Rg5 Ra1+ 52. Kb3
Rc1 53. Ka4 Kc7 54. Ka5 *
Position (FEN): 8/2k5/2p5/K5R1/1P6/8/8/2r5 b - - 26 54
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 1004
Best move: Ra1#