Chess puzzle (Checkmate)
Moves: 1. e4 d5 2. exd5 c6 3. d6 exd6 4. d4 d5 5. Nf3 Bd6 6. Be2 Nf6 7. Bg5 h5 8. c3
Bg4 9. Nbd2 Nbd7 10. Qb3 Qb6 11. Qc2 g6 12. Bd3 Be6 13. Bxg6 fxg6 14. Qxg6+ Bf7
15. Qf5 Be7 16. O-O O-O-O 17. Rae1 Rde8 18. Ne5 Qd8 19. Nxf7 Qc7 20. Nxh8 Rxh8
21. Rxe7 Ng4 22. Bf4 Qd8 23. h3 Qxe7 24. hxg4 hxg4 25. Qxg4 Qh7 26. f3 Rg8 27.
Qe6 Qg7 28. Nb3 *
Position (FEN): 2k3r1/pp1n2q1/2p1Q3/3p4/3P1B2/1NP2P2/PP4P1/5RK1 b - - 4 28
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 840
Best move: Qxg2#