Chess puzzle (Checkmate)
Opening: Blackmar-Diemer_Gambit, Blackmar-Diemer_Gambit_Zeller_Defense
Moves: 1. d4 d5 2. e4 dxe4 3. Nc3 Bf5 4. f3 exf3 5. Qxf3 Bc8 6. Bf4 c6 7. d5 e6 8. d6
Bxd6 9. O-O-O Bxf4+ 10. Qxf4 Bd7 11. Nh3 Nf6 12. g4 O-O 13. g5 Nd5 14. Nxd5
cxd5 15. Nf2 g6 16. Ng4 Nc6 17. Nf6+ Kg7 18. Qh4 Rh8 *
Position (FEN): r2q3r/pp1b1pkp/2n1pNp1/3p2P1/7Q/8/PPP4P/2KR1B1R w - - 6 19
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1159
Best move: Qh6#