Given the task definition and input, reply with output. In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

To capture " en passant " can only be done on the move right after the double-square pawn advance .

The option to capture the moved pawn " en passant " must be exercised on the move immediately following the double-step pawn advance , or it is lost for the remainder of the game .