Chess puzzle (Advantage)
Opening: Blackmar-Diemer_Gambit, Blackmar-Diemer_Gambit_Ryder_Gambit
Moves: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3 Bg4 6. Qf2 Nc6 7. Nf3 Bxf3 8.
gxf3 Qxd4 9. Be3 Qb4 10. O-O-O e6 11. Bb5 Be7 12. Bxc6+ *
Position (FEN): r3k2r/ppp1bppp/2B1pn2/8/1q6/2N1BP2/PPP2Q1P/2KR3R b kq - 0 12
Black to move.
Themes:  Middlegame  
Puzzle rating: 930
Best move: bxc6