Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. Qd2 e6 8.
O-O-O b5 9. f3 Bb7 10. Kb1 Qc7 11. a3 Rc8 12. Be3 Be7 13. Ncxb5 axb5 14. Nxb5
Qb8 15. Nxd6+ Bxd6 16. Qxd6 Qxd6 17. Rxd6 Ke7 18. Rd2 Ne5 19. Bb5 Nc4 20. Bxc4
Rxc4 21. Rhd1 e5 22. Bg5 Rc7 23. Rd6 Rhc8 24. g4 h6 25. Bxf6+ gxf6 26. c3 Bc6
27. f4 exf4 28. Kc2 Bxe4+ 29. Kb3 f3 30. R6d4 Bc6 31. Rf4 Rb8+ 32. Kc2 Ba4+ 33.
Rxa4 f2 34. Rf1 Rcb7 35. Rb4 Rxb4 36. axb4 Rg8 37. h3 h5 38. gxh5 Rg2 39. h6
Rh2 40. b5 Rxh3 41. Rxf2 Rxh6 42. c4 Kd6 43. Kb3 Kc5 44. Rf5+ Kb6 45. Kb4 Rg6
46. c5+ Kb7 47. b6 Kc6 48. Ka5 Rg8 49. b4 *
Position (FEN): 6r1/5p2/1Pk2p2/K1P2R2/1P6/8/8/8 b - - 0 49
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 1558
Best move: Ra8#