Beug du pion

You opponent is capturing en passant.
https://support.chess.com/en/articles/8557558-what-is-en-passant-it-s-not-an-illegal-pawn-move
You opponent is capturing en passant.
https://support.chess.com/en/articles/8557558-what-is-en-passant-it-s-not-an-illegal-pawn-move