Sacrifice Puzzle (Rated 913): Spot Mate in 2 — Queen Sacrifice

This puzzle is a classic forcing sequence in a sharp middlegame-to-endgame transition, where king safety matters more than material. White’s attack works because the enemy king is boxed in and the defending pieces are overloaded. The key idea is a sacrifice that removes the main defender and opens a direct mating line. In classical chess, these short tactical finishes often come from active rooks and a queen coordinating against a vulnerable king.