Queen's Pawn Game Accelerated London System Puzzle (Rated 1113): Win Material — Accelerated London System
This middlegame puzzle shows a classic tactical refutation in the Accelerated London System. White has extra material, but the king is still in the center and the bishop on g3 is loose, so Black can turn activity into a decisive material gain. The key idea is to use a forcing capture on the central knight, then keep the initiative with threats against the exposed white pieces. In classical chess, active pieces often matter more than static material when the king lacks safety.