Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Qe7 5. a3 Bxd2+ 6. Qxd2 c5 7. Nc3 cxd4 8.
Nxd4 d5 9. cxd5 exd5 10. g3 Nc6 11. Bg2 Be6 12. O-O O-O 13. Rac1 Rac8 14. Rfd1
Rfd8 15. Qf4 h6 16. Nf5 Bxf5 17. Qxf5 d4 18. Ne4 Nxe4 19. Bxe4 g6 20. Qf4 Kg7
21. Rc2 d3 22. Rxd3 Rxd3 23. Bxd3 Rd8 24. Kg2 Ne5 25. Be4 Rd4 26. Qe3 Rd1 27.
Qc3 Kh7 28. Rd2 Re1 29. Rd5 Ng4 30. Bf3 Ra1 31. Bxg4 Qe4+ 32. Bf3 Qb1 33. Kh3
Qf1+ 34. Bg2 Qxe2 35. Qf3 Qe6+ 36. g4 Re1 37. Rd8 Re5 38. Qc3 h5 39. Bf3 Re4
40. Bxe4 *
Position (FEN): 3R4/pp3p1k/4q1p1/7p/4B1P1/P1Q4K/1P3P1P/8 b - - 0 40
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 776
Best move: Qxg4#