Although common knowledge tells us that Opposite Colored Bishop "endings" increase the drawing chances for the defender, as we are reminded from this video lecture by GM Khachiyan, in the "middlegame" those same bishops can prove to be "doubled edged" friends indeed... Let Karpov show us how it's done, as he takes down Kasparov in a game from their WCH match of 1985! Full video available at http://www.Chess.com/videos