Learn How to Win with a Pin: Decisive Material Gain
This middlegame puzzle is built around a powerful pin on the white queen, which also creates a skewer against the king. Once the pinned piece is forced to stay in place, Black can increase pressure on the center and win material by exploiting the alignment of the queen and king. The position is a good example of how a single tactical idea can turn a slightly better position into a decisive advantage in classical chess.