French Defense: Rubinstein Variation, Ellis Gambit

The French Defense: Rubinstein Variation, Ellis Gambit is a chess opening classified under ECO code C10 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. Nc3 dxe4 4. Nxe4 e5. The resulting position leaves white to move.