Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 d5 7. Bb5 Ne4 8. cxd4
Bb6 9. Nc3 O-O 10. Be3 Bg4 11. h3 Bh5 12. Qc2 Nxc3 13. bxc3 Bxf3 14. gxf3 f6
15. f4 f5 16. Bd3 g6 17. h4 h5 18. O-O-O Kh7 19. Rdg1 Qd7 20. Rg5 Ne7 21. Rhg1
Rac8 22. Qe2 Kh6 23. Qf3 c5 24. Kd2 cxd4 25. cxd4 Qa4 26. Ke2 Bxd4 27. Rxh5+
gxh5 28. Rg5 Qe8 29. Bxd4 Rg8 30. Bxf5 Nxf5 31. Rxf5 Qb5+ 32. Ke3 Qe8 33. Qxd5
Rd8 34. Rf6+ Rg6 35. Rxg6+ Kxg6 36. Qe4+ Kh6 37. f5 Qa4 38. e6 Qa3+ 39. Kf4
Qd6+ 40. Be5 Qd2+ 41. Kf3 Qd1+ 42. Kg2 Rg8+ 43. Bg3 Qg4 44. Qe3+ Kh7 45. f6
Qxh4 46. f7 Rxg3+ 47. fxg3 Qf6 48. Qf4 Qb2+ 49. Kh3 Qb1 50. f8=Q *
Position (FEN): 5Q2/pp5k/4P3/7p/5Q2/6PK/P7/1q6 b - - 0 50
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 820
Best move: Qh1#