Russian Game Nimzowitsch Attack Puzzle (Rated 800): Win the Queen — Decisive Material Gain
This middlegame puzzle is a classic example of a forcing queenside attack that turns into a decisive material gain. Black’s active queen and rook coordinate against the white king’s shelter, while the white queen and rook are awkwardly placed and vulnerable to tactical pressure. The key idea is to use a forcing check to drag the king into a worse square, then simplify in a way that leaves White’s pieces overloaded and unable to defend everything at once.