Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Charousek_Variation
Moves: 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 O-O 6. Bxf6 Bxf6 7. e3 c5 8. h4
Nc6 9. Bd3 dxc4 10. Bxh7+ Kxh7 11. Ng5+ Kg6 12. Qc2+ Kh6 *
Position (FEN): r1bq1r2/pp3pp1/2n1pb1k/2p3N1/2pP3P/2N1P3/PPQ2PP1/R3K2R w KQ - 4 13
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1120
Best move: Qh7#