Learn How to Triangle Mate: Mate in 2
This chess endgame puzzle is a classic mating net built around king restriction and forcing checks. The attacking side uses active rook and queen coordination to drive the enemy king into a tighter box, where every escape square is covered. In positions like this, the key is not material but geometry: the king’s flight squares, open files, and the ability to force a reply. Once the first check lands, the follow-up is usually unavoidable.