Zilbermints Gambit

The Zilbermints Gambit, 1. Nf3 d5 2. c4 b5, is a rarely seen sideline of the Réti Opening. Black neither supports, advances nor captures with the d5-pawn. Instead, Black puts the b-pawn where the c4-pawn can take it. If White captures on b5, the c-pawn stops pressing on d5 and Black's central pawn is left secure. The cost is a pawn and a loosened queenside. The line sits outside mainstream theory.