Breton: When a piece is captured, a piece of the same kind (if there is one) of the capturing side must disappear. If there are several other pieces of the same kind as the captured piece, then only 1 of them must disappear, it is always the capturing side who decides which piece must disappear. If there is no piece of the same kind as the captured piece, then everything happens like an orthodox capture (no piece disappears, except the captured one).