Anti London System Puzzle (Rated 1218): Pin — Crushing Middlegame Tactics
This puzzle is a classic middlegame example of a pin turning into a decisive tactical gain. One side’s queen, rook, and bishop are coordinating against a king-side weakness, while a pinned pawn and overloaded defender limit defensive resources. The key idea is that a seemingly active piece can be tactically removed, opening the way for a forced sequence that wins material. In positions like this, the best move often comes from exploiting alignment, not from a direct attack on the king.