Chess puzzle (Checkmate)
Opening: Blackmar-Diemer_Gambit, Blackmar-Diemer_Gambit_Teichmann_Variation
Moves: 1. e4 d5 2. d4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 6. h3 Bh5 7. g4 Bg6 8.
Bg2 c6 9. Ne5 e6 10. Nxg6 hxg6 11. O-O Bd6 12. Qf3 Bc7 13. g5 Nh5 *
Position (FEN): rn1qk2r/ppb2pp1/2p1p1p1/6Pn/3P4/2N2Q1P/PPP3B1/R1B2RK1 w kq - 1 14
White to move.
Themes: Attacking f2 or f7 Opening Mate in 1 
Puzzle rating: 657
Best move: Qxf7#