Roadmap > Tactics > Targets > Pinned Pieces
Example of Targeting a Pinned Piece
White to move: 1. Bc6! Qxc4 2. Bxd7+
In the example, the black bishop on d7 is pinned because moving it would allow Qxd8+.
Since a pinned piece cannot move without exposing another target, it can become a target itself. By attacking it, you may create additional tactical opportunities or even win the piece.