Modern Defense Skewer in Chess

A modern defense skewer is a tactical motif in the Modern Defense where a piece attacks an enemy piece, and the attacked piece is forced to move (or cannot move), revealing an attack on a more valuable target behind it. In many Modern Defense structures, this often arises after a direct line is opened—commonly via central or diagonal pressure that aligns pieces on the same file or diagonal. The defining feature is the “line” created by the Modern Defense setup, enabling a forced sequence rather than a simple fork.