The Queen can also move in all directions, namely horizontally, vertically or diagonally as the king but the difference is that it can move any number of squares. So this is why Queen is the most valuable amongst all the character. If the Queen located at d4, it may move to all 7 squares on the chess board, all 7 squares on the fourth rank, all 7 squares on the 'a1-h8' diagonal and all 6 squares on the 'b7-g1' diagonal. All totally it can move to 27 possible moves.

The Rook is the next valuable character to the Queen as it is capable of moving only along files and ranks, again any number of squares. If you place the rook on b5 it only can move to all 7 squares on the b file and all 7 squares on the fifth rank.

Another important character of chess is the Bishop, which can only move along diagonals and any number of squares. In fact the Bishops are always moving on squares of the same colour. There are two types of Bishop one is 'light-squared bishop', moves on the white squares and the other is the 'dark-squared bishop', which moves on black squares. It is much powerful than a Knight.