French Defense: Steinitz Variation, Boleslavsky Variation

The French Defense: Steinitz Variation, Boleslavsky Variation is a chess opening classified under ECO code C11 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 7 moves: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3. The resulting position leaves black to move.