Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 Nc6 3. Bc4 d6 4. d3 Nf6 5. Nc3 g6 6. O-O Bg4 7. h3 Bxf3 8. Qxf3
Bg7 9. Be3 a6 10. Nd5 Nxd5 11. Bxd5 O-O 12. c3 Ne5 13. Qe2 Rb8 14. d4 Nd7 15.
Bg5 b5 16. a3 cxd4 17. cxd4 Bxd4 18. Rab1 Bg7 19. b4 Bf6 20. Bh6 Re8 21. Qf3
Ne5 22. Qe3 Qb6 23. Qe2 e6 24. Bb3 a5 25. bxa5 Qxa5 26. Qe3 Qxa3 27. Qf4 Bg7
28. Bxg7 Kxg7 29. Rfd1 Rbd8 30. Bc2 Qc5 31. Bd3 b4 32. Qd2 Nxd3 33. Qxd3 Qc3
34. Qd4+ Qxd4 35. Rxd4 Rb8 36. Rxd6 b3 37. Rd3 Red8 38. Rdxb3 Rxb3 39. Rxb3 Rd4
40. f3 Kf6 41. Rb7 h5 42. Kf2 Rd2+ 43. Kg3 Ra2 44. Rd7 Ra5 45. Kf4 e5+ 46. Kg3
Ra8 47. Rd6+ Kg7 48. Rd5 Re8 49. Kh4 Kh6 50. g3 *
Position (FEN): 4r3/5p2/6pk/3Rp2p/4P2K/5PPP/8/8 b - - 0 50
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 549
Best move: g5#