Opposite-Colored Bishops in the Middlegame by GM Nadezhda Kosintseva
You may have heard about the drawish tendencies of the opposite-colored bishops in chess endings. Indeed, sometimes thanks to these bishops the weaker side can build a positional fortress in a situation where he is one, two or even more pawns down. At the same time, in a middlegame, the bishops of opposite colors have one interesting feature. Particularly, very often when one side is attacking the presence of the opposite-colored bishops only increases chances to succeed. Indeed, since one bishop can attack what the other bishop cannot protect, the bishop of the defender plays a minor role in supporting the king and so nominally the attacker has an extra piece. In this lecture, I will show you a few instructive examples that demonstrate how dangerous positions with opposite-colored bishops can be.