Counter Nimzowitsch Puzzle (Rated 1187): Win Material — Tactical Refutation

This middlegame puzzle is a classic example of tactical refutation: one active move wins material by exploiting loose pieces and poor coordination. White’s pieces are well placed to attack undefended targets, while Black’s king remains exposed and the queenside is vulnerable. The key idea is to notice when a seemingly active enemy setup is actually overloaded. In classical chess, these moments often decide the game through a clean material gain rather than a direct mating attack.