Russian Game Nimzowitsch Attack Puzzle (Rated 1215): Win with a Pin — Decisive Material Gain

This middlegame puzzle is built around a powerful pin on the queenside that turns a loose queen into a tactical target. White’s queen is overworked and vulnerable, while Black’s active bishop creates a skewer-like pressure on the c-file and queenside. The key idea is that a seemingly natural capture can fail because it walks into a forcing sequence that wins material by exploiting alignment, hanging pieces, and king safety.