Learn How to Force a Killbox Mate: Exposed King
This puzzle is a classic example of a killbox mate: the attacking side uses forcing checks to herd the king into a shrinking box of squares. Even though the position is in the middlegame/endgame transition, the key idea is not material gain but king restriction. The queen and rook coordinate to keep the enemy king exposed, while every check improves the attacker’s control of escape squares. In practical terms, this is a mating net built from tempo, coordination, and relentless forcing moves.