Chess puzzle (Checkmate)
Moves: 1. c4 Nf6 2. g3 d6 3. Bg2 g6 4. Nc3 Bg7 5. e4 O-O 6. Nge2 e5 7. O-O Nh5 8. d3
f5 9. exf5 gxf5 10. f4 Nc6 11. Be3 Be6 12. Qd2 Qd7 13. Nd5 Rae8 14. Rae1 Nd4
15. Nxd4 exd4 16. Bf2 c6 17. Nb4 a5 18. Nc2 b6 19. Nxd4 Bxd4 20. Bxd4 c5 21.
Bc3 d5 22. Rxe6 Rxe6 23. Bxd5 Nf6 24. Bxf6 Rxf6 25. Re1 Kg7 26. Rxe6 Rxe6 27.
Bxe6 Qxe6 28. Kf2 Kg6 29. Qe3 Qd7 30. Ke2 Qa4 31. a3 Qc2+ 32. Qd2 Qb1 33. Ke3
Qg1+ 34. Qf2 Qc1+ 35. Kf3 a4 36. Kg2 Qd1 37. Qe3 Qc2+ 38. Kh3 Qxb2 39. Qe6+ Kg7
40. Qd7+ Kg6 41. Qxa4 Qe2 42. Qc6+ Kh5 43. Qg2 *
Position (FEN): 8/7p/1p6/2p2p1k/2P2P2/P2P2PK/4q1QP/8 b - - 4 43
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 882
Best move: Qg4#