Learn How to Pin: Decisive Material Gain
This middlegame puzzle is a classic example of using a pin to win material. White’s active bishop and rook coordination create pressure on the enemy king and the overloaded rook on the c-file. The key idea is that a pinned piece often cannot move because doing so would expose something more valuable behind it. In practical terms, this turns a seemingly defended position into a tactical liability and can force a decisive material gain.