Sacrifice Puzzle (Rated 1306): Spot Mate in 3 — Pillsbury's Mate

This puzzle is a classic mating attack built around a queen sacrifice that drags the enemy king into a vulnerable square. The key idea is not material gain, but forcing the king into a corridor where your rooks can deliver a decisive mating net. In practical classical chess and middlegame play, these patterns often appear when the opponent’s king shelter is weakened and your heavy pieces are already active.