Queens Gambit Declined Manhattan Variation Pin in Chess

In the Queens Gambit Declined, Manhattan Variation, a key tactical idea is the “pin”: one piece is lined up so that moving it would expose a more valuable piece behind it. Typically, after the Manhattan setup, Black aims to pin White’s knight or piece on a central/queenside square to restrict development and make the center easier to control. The defining feature is the alignment created by the Manhattan move order, turning a normal piece placement into a tactical constraint.