Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. d3 Nc6 3. Nd2 d6 4. g3 g6 5. Bg2 Bg7 6. Ngf3 e5 7. O-O Nge7 8. Re1
O-O 9. a3 a5 10. c3 a4 11. Nc4 b5 12. Ne3 f5 13. exf5 gxf5 14. Ng5 h6 15. Nh3
f4 16. Nd5 Ra7 17. gxf4 Bxh3 18. Nxe7+ Rxe7 19. Bxh3 exf4 20. Be6+ Rxe6 21.
Rxe6 Ne5 22. Qh5 Qd7 23. Qh3 Nf3+ 24. Qxf3 Qxe6 25. Bd2 Be5 26. Kh1 Kh8 27. Rg1
Rg8 28. Rxg8+ Kxg8 29. Qa8+ Kg7 30. Qb7+ Kg6 31. Qxb5 f3 32. Qc4 Qh3 33. Qg8+
Kf6 34. Qf8+ Kg6 35. Qg8+ Bg7 36. Qe8+ Kh7 37. Qe4+ Kg8 38. Qd5+ Kh8 39. Qa8+
Kh7 40. Qe4+ Kg8 41. Qe8+ Bf8 42. Qg6+ Kh8 43. Qg1 Bg7 44. Bf4 Be5 45. Bg3 h5
46. Bxe5+ dxe5 47. c4 h4 48. d4 exd4 49. b3 axb3 50. a4 b2 51. a5 b1=Q 52. Qxb1
*
Position (FEN): 7k/8/8/P1p5/2Pp3p/5p1q/5P1P/1Q5K b - - 0 52
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 827
Best move: Qg2#