Bad Bishop is a bishop that is often forced to operate on squares of the same color as its own pawns, which reduces its effectiveness.

How Does It Arise?

• The pawn chain blocks the bishop's diagonals.
• The bishop is condemned to passive defensive duties.
• The opponent does not allow the bishop to reach open diagonals.

A bad bishop is not always worthless; sometimes it plays an important defensive role. Still, in the long run, activating this bishop is a priority in many plans.