Russian Game Nimzowitsch Attack Puzzle (Rated 1180): Win Material — Decisive Middlegame Tactics
This puzzle is a classic middlegame example of using active pieces to win material. White’s pieces are coordinated on open lines, while Black’s queen is pulled into an overloaded defensive role. When one defender must protect multiple targets at once, tactical shots become possible. The key idea is to force a simplification that leaves White with a large material edge and a much more active position, turning piece activity into a concrete gain.