Chess puzzle (Checkmate)
Moves: 1. g3 g6 2. Bg2 Bg7 3. c4 c5 4. e3 Nc6 5. Ne2 Nf6 6. O-O O-O 7. d4 cxd4 8. exd4
d5 9. cxd5 Nxd5 10. Qb3 Nc7 11. d5 Nb8 12. Nbc3 Ne8 13. Bf4 a6 14. d6 Nxd6 15.
Bxd6 Qxd6 16. Bxb7 Bxb7 17. Qxb7 Qc6 18. Qxe7 Re8 19. Qb4 Nd7 20. Nd4 Bxd4 21.
Qxd4 Rad8 22. Nd5 Ne5 23. Qxe5 Rxe5 24. Rac1 Rexd5 25. Rxc6 R5d6 26. Rfc1 a5
27. Rxd6 Rxd6 28. Rc5 a4 29. Rc4 a3 30. bxa3 Rd2 31. Rc8+ Kg7 32. a4 Rxa2 33.
Ra8 Kf6 34. Kg2 Ke6 35. Kf3 h5 36. h4 Kf5 37. Ra5+ Ke6 38. Ke3 Ra3+ 39. Kf4 Kf6
40. Ra6+ Kg7 41. g4 hxg4 42. Kxg4 Kh6 43. f4 *
Position (FEN): 8/5p2/R5pk/8/P4PKP/r7/8/8 b - - 0 43
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 859
Best move: f5#