desperado
chess piece that is to be captured but captures an enemy piece before it happens or will cause stalemate when captured
en-GB/ˌdɛspəˈɹɑːdəʊ/
en-US/ˌdɛspəˈɹɑdoʊ/
chess piece that is to be captured but captures an enemy piece before it happens or will cause stalemate when captured