Vienna Game: Stanley Variation, Eifel Gambit

The Vienna Game: Stanley Variation, Eifel Gambit is a chess opening classified under ECO code C26 in the Open Games & French Defense family, beginning with 1.e4 e5 or 1.e4 e6, including the Italian Game, Ruy Lopez, and French Defense. It is reached after 4 moves: 1. e4 e5 2. Nc3 Nf6 3. Bc4 Bc5 4. Nge2 b5. The resulting position leaves white to move.