Learn How to Win a Trapped Piece: Four Knights Game
This middlegame puzzle comes from the Four Knights Game and shows how a seemingly active queen can become vulnerable when a bishop creates a pin against the king. The key idea is not a direct mating attack, but a tactical win of material: White uses piece coordination to force the queen into an awkward square, where it can be attacked by a lower-value piece. Once the defender is overloaded, the position collapses into a decisive material gain.