Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 dxc4 3. e4 Nc6 4. Nf3 Bg4 5. Be3 Bxf3 6. gxf3 g6 7. Bxc4 Bg7 8.
Bb5 e5 9. d5 a6 10. dxc6 Qxd1+ 11. Kxd1 axb5 12. cxb7 Rb8 13. f4 exf4 14. Bxf4
Rxb7 15. Nc3 Bxc3 16. bxc3 Ne7 17. Bg5 Nc6 18. Bf6 Rg8 19. Ke2 Na5 20. Rad1 Nc6
21. Rd3 h5 22. Rhd1 Rb8 23. Rb1 Na5 24. a4 Nc4 25. axb5 Nd6 26. f3 Kd7 27. Be5
Ke6 28. Bxd6 cxd6 29. f4 Rgc8 30. Ke3 Rc5 31. b6 Rc6 32. b7 Rc7 33. h4 Rcxb7
34. Rxb7 Rxb7 35. Rd4 Rb3 36. Kd3 f5 37. exf5+ gxf5 38. Kc4 Rb1 39. Rd2 Rh1 40.
Re2+ Kd7 41. Kd5 Rxh4 42. Rg2 Rxf4 43. Rg7+ Kd8 44. Kxd6 h4 *
Position (FEN): 3k4/6R1/3K4/5p2/5r1p/2P5/8/8 w - - 0 45
White to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 827
Best move: Rg8#