French Defense Knight Variation Puzzle (Rated 984): Skewer — Middlegame Win
A skewer is one of chess's sharpest tactical weapons: a single long-range piece attacks two enemy units on the same line, and the front piece must step aside, exposing whatever stands behind it. In the middlegame, skewers are at their most devastating when a forcing check drives the enemy king off the line first. Here a side that is ahead on material finds its extra pieces trapped and undefended — a warning that a big advantage means nothing once the opponent's heavy piece seizes control of the entire back rank.