Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Bf4 O-O 5. e3 d6 6. Be2 Nbd7 7. Bg3 c5 8. d5
e5 9. e4 a6 10. h4 h6 11. h5 g5 12. Nf3 Nh7 13. Nh2 f5 14. exf5 Rxf5 15. Bg4
Rf8 16. Be6+ Kh8 17. Ng4 Ndf6 18. Nxf6 Qxf6 19. Bxc8 Raxc8 20. Qb3 Rb8 21.
O-O-O Qf5 22. f3 Nf6 23. Rhf1 Nxh5 24. Bh2 Nf4 25. Bxf4 exf4 26. Ne4 Be5 27.
Rh1 Kg7 28. Rh5 Rh8 29. Rdh1 b5 30. Nc3 Qd3 31. cxb5 axb5 32. Ne4 Qe2 33. Qc2
Qe3+ 34. Kb1 c4 35. Nxg5 hxg5 36. Rxg5+ Kf7 37. Qf5+ Ke7 38. Rh7+ Rxh7 39.
Qxh7+ Kd8 *
Position (FEN): 1r1k4/7Q/3p4/1p1Pb1R1/2p2p2/4qP2/PP4P1/1K6 w - - 1 40
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1008
Best move: Rg8#