Chess puzzle (Checkmate)
Moves: 1. e4 c6 2. d3 d5 3. exd5 cxd5 4. Nc3 Bf5 5. Nf3 e6 6. Be2 Nc6 7. O-O Nf6 8. d4
Be7 9. Bb5 O-O 10. Re1 a6 11. Bxc6 bxc6 12. Ne5 c5 13. Nc6 Qc7 14. Nxe7+ Qxe7
15. dxc5 Qxc5 16. Be3 Qd6 17. a3 e5 18. b4 d4 19. Ne2 Bxc2 20. Qxc2 dxe3 21.
fxe3 Qb6 22. Qc3 e4 23. Ng3 Rfe8 24. Kh1 Rac8 25. Qd4 Qxd4 26. exd4 h6 27. Rad1
Rcd8 28. d5 Nxd5 29. Rxe4 Rxe4 30. Nxe4 Re8 31. Rxd5 Rxe4 32. h3 Re3 33. Ra5 g5
34. Rxa6 f5 35. Kg1 h5 36. Kf2 Rc3 37. b5 g4 38. hxg4 hxg4 39. b6 Rc2+ 40. Kf1
Rb2 41. a4 Kg7 42. Ra7+ Kg6 43. b7 Kg5 44. a5 Kf4 45. a6 g3 46. Ke1 Ke3 47. Kd1
Kd3 48. Kc1 Kc3 49. Ra8 Rxg2 50. b8=Q *
Position (FEN): RQ6/8/P7/5p2/8/2k3p1/6r1/2K5 b - - 0 50
Black to move.
Themes:  Endgame, Queen and Rook Endgame Mate in 1 
Puzzle rating: 1092
Best move: Rg1#