Chess puzzle (Checkmate)
Opening: Blackmar-Diemer_Gambit, Blackmar-Diemer_Gambit_Euwe_Defense
Moves: 1. d4 Nf6 2. f3 d5 3. e4 dxe4 4. Nc3 exf3 5. Nxf3 e6 6. Bg5 Be7 7. Bd3 O-O 8.
O-O c5 9. dxc5 Bxc5+ 10. Kh1 Be7 11. Qe1 h6 12. Qh4 Nc6 13. Bxh6 gxh6 14. Qxh6
Nb4 15. Ng5 Nxd3 16. Rxf6 Bxf6 *
Position (FEN): r1bq1rk1/pp3p2/4pb1Q/6N1/8/2Nn4/PPP3PP/R6K w - - 0 17
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 811
Best move: Qh7#