Each player has two Knights at the beginning of the game, one on a light square and one on a dark square.
Unlike the Bishop though, the Knights can move from a light square to dark and vica versa.
Another unusual feature of the Knight is that it can jump pieces - it doesn't need a clear route to its destination.
The final feature of the Knight is its unusual movement, see below, always moving to the opposite colour of square from that it began its move from.