Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 f6 7. O-O Bb4 8.
Nb5 a6 9. Nd6+ Bxd6 10. Qxd6 Nge7 11. Rd1 O-O 12. b3 Kh8 13. Ba3 b5 14. Bf1 Qa5
15. Bc5 Rg8 16. Qg3 d5 17. b4 Qd8 18. Rac1 Bb7 19. a4 bxa4 20. Ra1 Qe8 21. Rxa4
dxe4 22. Nd2 Ne5 23. Rda1 Nf5 24. Qa3 Qc6 25. Rc1 Rgc8 26. Nb3 Nd3 27. Bxd3
exd3 28. f3 Qd5 29. Rd1 e5 30. Na5 e4 31. Nxb7 Qxb7 32. fxe4 Qxe4 33. Rxa6 Rxa6
34. Qxa6 Re8 35. Qxd3 Qg4 36. h3 Qg5 37. Rf1 Ng3 38. Rd1 Ne2+ 39. Kh2 Nf4 40.
Qd7 *
Position (FEN): 4r2k/3Q2pp/5p2/2B3q1/1P3n2/7P/6PK/3R4 b - - 8 40
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 667
Best move: Qxg2#