Chess puzzle (Advantage)
Opening: Vienna_Game, Vienna_Game_Vienna_Gambit
Moves: 1. e4 e5 2. Nc3 Nf6 3. f4 exf4 4. e5 Ng8 5. Nf3 Nc6 6. d4 Bb4 7. Bxf4 d6 8. Bb5
Bd7 9. O-O a6 10. Ba4 dxe5 11. Bxe5 Nxe5 12. Bxd7+ *
Position (FEN): r2qk1nr/1ppB1ppp/p7/4n3/1b1P4/2N2N2/PPP3PP/R2Q1RK1 b kq - 0 12
Black to move.
Themes:  Opening  
Puzzle rating: 1519
Best move: Nxd7