Chess puzzle (Checkmate)
Moves: 1. e4 d5 2. exd5 Nf6 3. Nc3 Nxd5 4. Nxd5 Qxd5 5. d4 Bf5 6. c3 Nc6 7. Nf3 O-O-O
8. Bd3 Bxd3 9. Qxd3 g6 10. O-O e5 11. c4 Qd7 12. d5 Nb4 13. Qd1 e4 14. Ne5 Qf5
15. Qg4 Qxg4 16. Nxg4 f5 17. Ne3 Bc5 18. a3 Bxe3 19. axb4 Bxc1 20. Rfxc1 Kb8
21. b5 c6 22. bxc6 bxc6 23. Ra5 cxd5 24. cxd5 Rc8 25. Rac5 Rxc5 26. Rxc5 Rc8
27. Rb5+ Kc7 28. Kf1 Kd6 29. Ke2 Rc5 30. Rb7 Rc7 31. Rb5 a6 32. Rb6+ Kxd5 33.
Rxa6 Rb7 34. Ke3 Rxb2 35. Ra5+ Ke6 36. Ra6+ Ke5 37. Ra5+ Kf6 38. Ra6+ Ke5 39.
Ra5+ Ke6 40. g3 g5 41. Ra6+ Ke5 42. Rh6 f4+ 43. gxf4+ *
Position (FEN): 8/7p/7R/4k1p1/4pP2/4K3/1r3P1P/8 b - - 0 43
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 1184
Best move: gxf4#