Chess puzzle (Checkmate)
Opening: Blackmar-Diemer_Gambit, Blackmar-Diemer_Gambit_Zeller_Defense
Moves: 1. e4 d5 2. d4 dxe4 3. Nc3 Bf5 4. f3 exf3 5. Qxf3 Bc8 6. Bc4 Nf6 7. Nh3 Qxd4 8.
Bd3 Bg4 9. Qxb7 Qe5+ 10. Ne4 Nxe4 11. Bxe4 Bf5 12. O-O Bxe4 *
Position (FEN): rn2kb1r/pQp1pppp/8/4q3/4b3/7N/PPP3PP/R1B2RK1 w kq - 0 13
White to move.
Themes:  Opening Mate in 1 
Puzzle rating: 1071
Best move: Qc8#