Chess puzzle (Checkmate)
Moves: 1. c4 g6 2. d4 Bg7 3. Nc3 c6 4. e4 d6 5. Nf3 Bg4 6. Be2 Nd7 7. h3 Bxf3 8. Bxf3
e5 9. d5 Ne7 10. O-O O-O 11. Bg5 f5 12. h4 h6 13. Be3 f4 14. Bd2 Bf6 15. g3 g5
16. hxg5 hxg5 17. Kg2 Kg7 18. Rh1 Rh8 19. Bg4 fxg3 20. Qf3 Rxh1 21. Rxh1 Nc5
22. fxg3 Ng6 23. Qf5 Qg8 24. Bxg5 Bxg5 25. Qxg5 Qf7 26. Bf5 Rg8 27. Qh6+ Kf6
28. Rf1 Ke7 29. Qg5+ Ke8 30. Be6 Qg7 31. Bxg8 Qxg8 32. Rf6 Nf4+ 33. gxf4 Qxg5+
34. fxg5 Nd7 35. Rf5 Nf8 36. Rf3 Ng6 37. Rf6 Nf4+ 38. Kf3 Ke7 39. Rxf4 exf4 40.
Kxf4 Kf7 41. Kf5 a6 42. dxc6 bxc6 43. b4 c5 44. e5 cxb4 45. exd6 bxc3 46. d7
Ke7 47. g6 c2 48. g7 c1=Q 49. g8=Q Qf1+ 50. Ke5 Qe2+ 51. Kd5 Qd3+ 52. Kc5 *
Position (FEN): 6Q1/3Pk3/p7/2K5/2P5/3q4/P7/8 b - - 6 52
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 1191
Best move: Qd6#