French Defense Exchange Variation Puzzle (Rated 925): Knight Fork — Win Queen
A knight fork is at its most lethal when the checking knight also lands on the enemy queen. Here Black holds an extra piece, but the black king sits exposed with a thinned pawn shield — that is the imbalance White must exploit. The knight already stands on a deep, unassailable outpost, from which one jump gives check while also hitting the queen and a rook. Since the king must answer the check, the queen cannot escape, and White converts into a decisive material gain.