Chess puzzle (Checkmate)
Moves: 1. d4 g6 2. e4 Bg7 3. Nf3 d6 4. Bg5 h6 5. Bh4 g5 6. Bg3 f5 7. exf5 Bxf5 8. Bd3
Bxd3 9. Qxd3 Nc6 10. Qg6+ Kf8 11. O-O Qe8 12. Qf5+ Qf7 13. Qb5 Nxd4 14. Qxb7
Nxf3+ 15. gxf3 Re8 16. Nc3 Bxc3 17. bxc3 Nf6 18. Qxc7 Nh5 19. Qxa7 Nxg3 20.
fxg3 h5 21. Qd4 Qh7 22. a4 h4 23. g4 h3 24. a5 Qxc2 25. Qxh8+ Kf7 26. Qh5+ Ke6
27. Qxe8 *
Position (FEN): 4Q3/4p3/3pk3/P5p1/6P1/2P2P1p/2q4P/R4RK1 b - - 0 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 871
Best move: Qg2#