Chess puzzle (Checkmate)
Opening: Blackmar-Diemer_Gambit, Blackmar-Diemer_Gambit_Ryder_Gambit
Moves: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3 Qxd4 6. Be3 Qg4 7. Qf2 Qb4 8.
O-O-O Nc6 9. Nb5 Qa5 10. Qe1 Qxe1 *
Position (FEN): r1b1kb1r/ppp1pppp/2n2n2/1N6/8/4B3/PPP3PP/2KRqBNR w kq - 0 11
White to move.
Themes:  Opening Mate in 1 
Puzzle rating: 1320
Best move: Nxc7#