Van Geet Opening: Düsseldorf Gambit is a chess opening with the ECO code A00, part of the Van Geet Opening family. It goes 1. Nc3 c5 2. b4. White opens with 1. Nc3 (the Dunst/Van Geet knight move) and Black answers 1... c5. After 3 moves it is Black to move. The lesson on the board explains every move of the line and lets you play it yourself; it is free.
White starts with 1.Nc3, an offbeat but sound move. It develops a knight and can later turn into a Vienna, a Pirc-like or a d4 game.