Van Geet Opening: Grünfeld Defense

The Van Geet Opening: Grünfeld Defense is a chess opening classified under ECO code B01 in the Semi-Open Games family, where Black responds to 1.e4 with something other than 1...e5, including the Sicilian Defense, Caro-Kann, and Pirc. It is reached after 3 moves: 1. e4 d5 2. Nc3 dxe4 3. Nxe4 e5. The resulting position leaves white to move.