Is position everything? Does material advantage count?
In the opposite colored bishops, each side has a single bishop who reside on opposite colored squares and thus cannot attack or block each other.
Without other pieces (but with pawns) these endings have a tendency to result in a draw. These are some of the most difficult endings in which to convert a small material advantage to a win is not an easy task!
The session includes multiple examples, PGN files available for paid subscribers.