Chess puzzle (Checkmate)
Moves: 1. d4 e6 2. Nf3 d5 3. Bf4 Nc6 4. e3 Nf6 5. Nbd2 Be7 6. Be2 O-O 7. O-O Bd7 8. c4
Rb8 9. a3 Na5 10. c5 b6 11. b4 Nc6 12. b5 Na5 13. c6 Be8 14. a4 Bd6 15. Bxd6
Qxd6 16. Nb3 Nxb3 17. Qxb3 Ne4 18. Bd3 f6 19. Bxe4 dxe4 20. Nd2 f5 21. Nc4 Qd5
22. Rfb1 Bf7 23. Ne5 Qxb3 24. Rxb3 Rfe8 25. h3 Ra8 26. a5 Reb8 27. Nd7 Rd8 28.
Rba3 Be8 29. axb6 Bxd7 30. cxd7 Rxd7 31. b7 Rb8 32. Rxa7 Kf7 33. Rc1 Ke7 34.
Rc6 g6 35. g4 Kf7 36. Kg2 Ke7 37. Kg3 Kf7 38. f3 exf3 39. Kxf3 Kg7 40. Kf4 Kf7
41. h4 Ke7 42. gxf5 exf5 43. Kg5 Kf7 44. Rf6+ Kg7 45. Rc6 Re7 46. Rc3 c6 47.
bxc6 Re4 48. h5 *
Position (FEN): 1r6/RP4kp/2P3p1/5pKP/3Pr3/2R1P3/8/8 b - - 0 48
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 728
Best move: Rg4#