Page "Bishop (chess)" Paragraph 11

Conversely, a bishop which is impeded by friendly pawns is often referred to as a " bad bishop " ( or sometimes, disparagingly, a " tall pawn ").

However, a " bad " bishop need not always be a weakness, especially if it is outside its own pawn chains.

In addition, having a " bad " bishop may be advantageous in an opposite-colored bishops endgame.

Even if the bad bishop is passively placed, it may serve a useful defensive function ; a well-known quip from GM Mihai Suba is that " Bad bishops protect good pawns.