As explained in the previous lesson about the pawn moves a pawn is able to move two squares forward when it has not moved before, but there is a special rule to prevent them to pass an opposite pawn.
On the very next move and only on this next move, this pawn can be captured on the field that has been skipped.



The animated diagram above shows a white pawn that moves two squares forward. It passes a square that is attacked by the black pawn. At the next move Black takes the pawn by placing his pawn on the square. After a little pause the animation will start over again.

Next lesson: Castling.