Chess puzzle (Checkmate)
Moves: 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 f5 5. Be3 Nf6 6. Bd3 fxe4 7. Nxe4 O-O 8. f3
d5 9. Nxf6+ Rxf6 10. c5 b6 11. b4 bxc5 12. bxc5 Ba6 13. Ne2 Bxd3 14. Qxd3 Nc6
15. O-O e5 16. Rfd1 exd4 17. Nxd4 Nxd4 18. Bxd4 Rf5 19. Rab1 c6 20. Rb7 Rf7 21.
Rdb1 Qe8 22. Bxg7 Kxg7 23. Qd4+ Kg8 24. Kf2 Rd8 25. Re1 Rxb7 26. Rxe8+ Rxe8 27.
Qf6 Rc7 28. Qd6 Rcc8 29. Qd7 a5 30. Qa7 Re6 31. Qxa5 Rce8 32. Qa4 h5 33. a3 h4
34. Qa6 d4 35. Qd3 Kh7 36. g3 h3 37. g4 Kh6 38. Qxd4 g5 39. a4 Re2+ 40. Kg3 Rf8
41. Qd6+ Kg7 42. Qxc6 Rh8 43. Qd7+ Kg8 44. c6 *
Position (FEN): 6kr/3Q4/2P5/6p1/P5P1/5PKp/4r2P/8 b - - 0 44
Black to move.
Themes:  Endgame, Queen and Rook Endgame Mate in 1 
Puzzle rating: 911
Best move: Rg2#