Bird Opening En Passant in Chess

“Bird Opening En Passant” refers to an en-passant capture that arises from a Bird Opening pawn structure—most often after White’s early f-pawn or e-pawn advances create a vulnerable pawn on the 5th rank. In the Bird Opening, the defining feature is that a pawn can move two squares and be immediately capturable en passant by a pawn that has advanced to the correct rank. This motif turns a seemingly “normal” pawn push into a tactical shot that changes the pawn structure instantly.