Learn How to Triangle Mate: Queenside Attack
This middlegame puzzle shows a classic queenside attack where the enemy king is boxed in by its own pieces and pawns. White’s heavy pieces coordinate to create a mating net, and the key idea is to use forcing checks to limit the king’s escape squares. Even though material is not equal, the tactical priority is king safety: once the first check lands, the defense collapses because the king has no safe flight route.