When a pawn makes a two-step advance from its starting position and there is an opponent's pawn on a square next to the destination square on an adjacent file, then the opponent's pawn can capture it "en passant" ("in passing"), moving to the square the pawn passed over. This can be done only on the very next turn; otherwise, the right to do so is forfeited. For example, in the animated diagram, the black pawn advances two steps from g7 to g5, and the white pawn on f5 can take it "en passant" on g6 (but only on White's next move).