Chess puzzle (Advantage)
Opening: Vienna_Game, Vienna_Game_Vienna_Gambit
Moves: 1. Nc3 e5 2. e4 Nf6 3. f4 Nc6 4. Nf3 exf4 5. d4 d5 6. e5 Ne4 7. Nxe4 *
Position (FEN): r1bqkb1r/ppp2ppp/2n5/3pP3/3PNp2/5N2/PPP3PP/R1BQKB1R b KQkq - 0 7
Black to move.
Themes:  Opening  
Puzzle rating: 1167
Best move: dxe4