bishop a1,
if rook takes, queen takes rook, if rook checks, rook takes rook
if queen takes bishop, queen takes queen, if queen moves anywhere else, bishop takes queen.
if pawn moves, queen takes pawn
bishop a1,
if rook takes, queen takes rook, if rook checks, rook takes rook
if queen takes bishop, queen takes queen, if queen moves anywhere else, bishop takes queen.
if pawn moves, queen takes pawn