English Defense Pin in Chess

An english defense pin is a tactical motif in which Black uses the English Defense structure to pin a White piece to the king or to a more valuable piece. A common defining feature is a line created by Black’s pieces (often via …Bb4, …Bg4, or a related diagonal/line) so the pinned piece cannot move without consequences. The pin typically appears after White commits to a piece placement that allows Black to align an attacker with the target.