The Relative Pin is a chess tactic that involves pinning a piece to another piece of the same color. Unlike an absolute pin, where a piece is pinned to a king, a relative pin is a pin between two of the same colored pieces. This can be used as a defensive or offensive tool, depending on the position of the pieces.
An example of a defensive relative pin can be seen when a knight pins a rook to the queen. This prevents the rook from moving, because if it does the queen will be attacked. This can be used to protect the queen and to prevent the opponent from attacking the queen.
On the other hand, an offensive relative pin can be seen when a rook pins a queen to a bishop. This prevents the queen from moving, because if it does the bishop will be attacked. This can be used to attack the bishop and to put pressure on the opponent’s position.