Chess puzzle (Checkmate)
Opening: Nimzowitsch_Defense, Nimzowitsch_Defense_Scandinavian_Variation
Moves: 1. e4 d5 2. d4 Nc6 3. Nc3 e5 4. exd5 Nxd4 5. Nf3 Nxf3+ 6. Qxf3 Bd6 7. Be3 Nf6
8. O-O-O O-O 9. h4 a5 10. h5 Bg4 11. Qg3 Bxd1 12. h6 e4 *
Position (FEN): r2q1rk1/1pp2ppp/3b1n1P/p2P4/4p3/2N1B1Q1/PPP2PP1/2Kb1B1R w - - 0 13
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 900
Best move: Qxg7#