Domination for beginners

It's not what you think! When one of our pieces takes all (or virtually all) squares away from its enemy counterpart, we say that our piece dominates the enemy piece.

White to play: the Bd5 dominates the Nd8

The Kc6 dominates the Na8

The poor Na8 has no legal moves, and the White king can eat at his leisure.

So knights are weak and pathetic, right?

Black to play and win

 
Here's another goodie from Beginning Chess.