Chess puzzle (Checkmate)
Moves: 1. d4 g6 2. e4 Bg7 3. Nf3 d6 4. Nc3 Bg4 5. Be3 Nd7 6. Qd2 Bxf3 7. gxf3 e5 8.
Bh3 Ne7 9. Bxd7+ Qxd7 10. dxe5 Bxe5 11. O-O-O Qe6 12. Kb1 Nc6 13. h4 O-O-O 14.
Nd5 f5 15. h5 a6 16. hxg6 hxg6 17. Rhg1 Rh3 18. Qe2 Rg8 19. exf5 Qxf5 20. f4
Bh8 21. Rg5 Qe6 22. Qc4 Re8 23. a4 Rh5 24. b4 Rxg5 25. fxg5 Qe5 26. Qb3 *
Position (FEN): 2k1r2b/1pp5/p1np2p1/3Nq1P1/PP6/1Q2B3/2P2P2/1K1R4 b - - 2 26
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1257
Best move: Qa1#