Chess puzzle (Checkmate)
Opening: Blackmar-Diemer_Gambit, Blackmar-Diemer_Gambit_von_Popiel_Gambit
Moves: 1. Nc3 Nf6 2. e4 d5 3. d4 dxe4 4. Bg5 Nbd7 5. f3 exf3 6. Nxf3 e6 7. Bd3 Be7 8.
O-O c5 9. Kh1 cxd4 10. Nxd4 Qa5 11. Qd2 O-O 12. Nb3 Qc7 13. Rae1 h6 14. Bxh6
gxh6 15. Qxh6 Ne5 16. Re3 Neg4 17. Qh4 Nxe3 18. Rxf6 Bxf6 *
Position (FEN): r1b2rk1/ppq2p2/4pb2/8/7Q/1NNBn3/PPP3PP/7K w - - 0 19
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1153
Best move: Qh7#