Three Knights Opening: Steinitz Defense

The Three Knights Opening: Steinitz Defense is a chess opening classified under ECO code C46 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 3 moves: 1. e4 e5 2. Nf3 Nc6 3. Nc3 g6. The resulting position leaves white to move.