Van Geet Opening: Grünfeld Defense, Steiner Gambit

The Van Geet Opening: Grünfeld Defense, Steiner Gambit is a chess opening classified under ECO code C31 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. f4 d5 3. Nc3 dxe4 4. Nxe4. The resulting position leaves black to move.