In chess, why is a bishop generally worth more than a knight?

In most positions, a bishop is worth slightly more than a knight because of its longer range of movement. As a game progresses, pawns get traded down, removing support points from the knight and opening up lines for the bishop. This generally leads to the bishop's advantage increasing over time. read more

Because Bishops generally influence more squares than a knight, generally have more options, and having the Bishop Pair is a significant advantage in open board states. A Knight can influence a max of 8 squares at any time, whereas a Bishop can affect up to 13. read more

6)The bishop can form a battery with the queen, whereas the knight can not, nor can the knight 'connect' with any other piece strongly except for itself. As such. Though once again, this is more relevant when the board is open enough for batteries to be of greater value. read more