Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 Be7 4. a3 a5 5. Nc3 O-O 6. Bg5 d5 7. cxd5 exd5 8. Qc2
c6 9. e3 Be6 10. Bd3 Nbd7 11. O-O Re8 12. Rab1 Nf8 13. b4 axb4 14. axb4 Qd7 15.
b5 Rec8 16. Ne5 Qd8 17. bxc6 bxc6 18. Na4 c5 19. Nb6 cxd4 20. Nxc8 Rxc8 21. Nc6
Qd6 22. Nxe7+ Qxe7 23. Qd2 dxe3 24. Qxe3 h6 25. Bxf6 Qxf6 26. Rfc1 Ra8 27. Rb6
Nd7 28. Rbc6 Ne5 29. R6c2 Nc4 30. Bxc4 dxc4 31. Rc3 Ra2 32. h3 Qg6 33. Rd1 Qh5
34. Rd8+ Kh7 35. Qe4+ Qg6 36. Qc6 Qb1+ 37. Kh2 Ra1 38. Qe8 Qh1+ 39. Kg3 Rg1 40.
Qh8+ Kg6 41. Kh4 Rxg2 42. Rg8 Kf6 43. Rf3+ Bf5 44. Rxg7 Rxg7 45. Qd8+ Kg6 46.
Qd6+ Kh7 47. Rxf5 Qg2 48. Qf4 Rg5 49. Rxf7+ Rg7 50. Rxg7+ Qxg7 51. Qxc4 *
Position (FEN): 8/6qk/7p/8/2Q4K/7P/5P2/8 b - - 0 51
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 892
Best move: Qg5#