Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. Bf4 Nf6 3. e3 Nc6 4. Nf3 Bg4 5. Be2 Ne4 6. O-O e6 7. c4 Bd6 8. Bg3
O-O 9. cxd5 exd5 10. Nc3 Be7 11. Nxe4 Bxf3 12. Bxf3 dxe4 13. Bxe4 g6 14. Rc1
Bd6 15. Bxc6 bxc6 16. Rxc6 Qe7 17. Bxd6 cxd6 18. Qf3 Rac8 19. Rfc1 Rxc6 20.
Rxc6 Rb8 21. b3 Kg7 22. h3 Rb6 23. Rxb6 axb6 24. Qc6 Qd8 25. a4 d5 26. b4 g5
27. a5 bxa5 28. b5 a4 29. b6 a3 30. Qa4 Qxb6 31. Qxa3 Qb1+ 32. Kh2 Qb8+ 33. g3
Qd8 34. Qc5 Qf6 35. Kg2 Qe6 36. Qc2 h5 37. Qd3 g4 38. hxg4 hxg4 39. f3 gxf3+
40. Kxf3 Qf6+ 41. Kg2 Qe6 42. Qe2 Qe4+ 43. Qf3 Qc2+ 44. Kh3 Qh7+ 45. Kg2 Qc2+
46. Kf1 Qd2 47. e4 Qc1+ 48. Kg2 Qc2+ 49. Qf2 Qxe4+ 50. Kh3 f5 51. Qf4 *
Position (FEN): 8/6k1/8/3p1p2/3PqQ2/6PK/8/8 b - - 1 51
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 950
Best move: Qh1#