One of the major benefits of the fianchetto is that it often allows the fianchettoed bishop to become more active. However, a fianchettoed position also presents some opportunities for the opponent: if the fianchettoed bishop can be , the squares the bishop was formerly protecting will become weak (see "") and can form the basis of an attack (particularly if the fianchetto was performed on the ). Exchanging the fianchettoed bishop should not be done lightly, therefore, especially if the enemy bishop of the same colour is still on the board.