Ever here of the "overworked" defender" chess move? Of course you have, but that doesn't mean you know how to pull it off. See how to do it, right here. A chess piece is overworked when it has more than one defensive job (guarding pieces or squares) to do. Typically, the overworked piece is exploited by capturing one of the pieces it's defending or occupying a square it's defending. This forces it to leave one of its defensive jobs usually resulting in material loss or checkmate.