Pin Puzzle (Rated 1646): Win with a Pin — Middlegame Tactics

This puzzle is a classic middlegame example of a long pin turning into a decisive tactical sequence. One side’s heavy piece activity and king safety issues create a position where a pinned defender cannot move freely, and that restriction becomes the key to everything. The important idea is that a pin is not just a static inconvenience: it can freeze a piece, overload defenders, and open lines for a stronger attack. In practical play, these positions often decide the game even when material is still close.