Sacrifice Puzzle (Rated 1160): Spot Mate in 3 — Back Rank Mate

This puzzle is a classic middlegame mating attack built around king safety and a back rank weakness. White’s pieces coordinate to force the enemy king into a cramped corner, where escape squares are limited and defensive pieces are overloaded. The key idea is not raw material, but forcing moves that create a mating net. In classical chess, these patterns often appear when a queen and rook work together against an exposed king and a pinned defender.