Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Other_variations
Moves: 1. d4 e6 2. c4 d5 3. cxd5 exd5 4. Nc3 Nf6 5. Nf3 Bb4 6. Bg5 Bxc3+ 7. bxc3 O-O
8. Bxf6 Qxf6 9. e3 h6 10. Bd3 Nd7 11. Bc2 Nb6 12. Qd3 Nc4 *
Position (FEN): r1b2rk1/ppp2pp1/5q1p/3p4/2nP4/2PQPN2/P1B2PPP/R3K2R w KQ - 6 13
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 749
Best move: Qh7#