Horwitz Defense Pin in Chess

The horwitz defense pin is a tactical motif where the Horwitz Defense setup leads to a piece being pinned to a more valuable target (often the king or a high-value piece). In the Horwitz Defense, the defining feature is that your defensive move creates a line so an enemy piece cannot move without exposing what’s behind it. The result is that the opponent’s options shrink while you gain time or win material.