Van Geet Opening: Pfeiffer Gambit, Sleipnir Countergambit

The Van Geet Opening: Pfeiffer Gambit, Sleipnir Countergambit is a chess opening classified under ECO code A00 in the Flank Openings family, characterized by moves like 1.c4, 1.Nf3, or 1.f4, aiming to control the center indirectly. It is reached after 4 moves: 1. Nc3 d5 2. f4 d4 3. Ne4 e5 4. Nf3. The resulting position leaves black to move.