Chess puzzle (Checkmate)
Opening: Blackmar-Diemer_Gambit, Blackmar-Diemer_Gambit_Ryder_Gambit
Moves: 1. e4 d5 2. d4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3 Qxd4 6. Be3 Qb4 7. O-O-O Bg4
8. Nb5 Na6 9. Qxb7 Rb8 10. Qc6+ Nd7 11. Rd4 Qa5 12. Rxg4 *
Position (FEN): 1r2kb1r/p1pnpppp/n1Q5/qN6/6R1/4B3/PPP3PP/2K2BNR b k - 0 12
Black to move.
Themes:  Opening Mate in 1 
Puzzle rating: 1438
Best move: Qe1#