Middlegame Puzzle (Rated 1414): Pin — Win Material

This middlegame puzzle centers on a relative pin and a tactical refutation. A seemingly active enemy queen creates pressure along a file, but that pressure also ties a rook to an important piece. By identifying the pinned defender and noticing what becomes exposed when the rook moves, White can exploit a hidden discovered attack. The key idea is not a mating combination, but a precise exchange sequence that transforms tactical pressure into a decisive material advantage.