Even though  the value of the knight, is equal to the bishop, it`s kind of movement and capturing is a little more difficult in the beginning. It moves by two kinds of directions; one square orthogonally, then one diagonally or verse. The knight is a leaper, the only piece that can jump over other pieces. (see graphic below where it is shown step by step).               


However, the knight has different numbers of possibilities, depends on where it is placed.                               

Knight in the center: it has 8 moves

Knight at the margin:  it has 4 moves

Knight in the corner:  in this case it has only 2 moves

  Exercise on the board above!