Μπερντ και Γκρομπ

An opening where White advances a kingside pawn immediately to control a central square and gain space, while accepting some weaknesses.

A reply to Bird’s Opening in which Black advances the e7-pawn to e5 and offers it for rapid development and an attack on White’s king.

An irregular opening where White advances a kingside pawn two squares, gaining space but immediately weakening the area around the king.