French Defense: Advance Variation, Frenkel Gambit

The French Defense: Advance Variation, Frenkel Gambit is a chess opening classified under ECO code C02 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 e6 2. d4 d5 3. e5 c5 4. b4. The resulting position leaves black to move.