Black To Move Puzzle (Rated 973): Win with a Rook Sacrifice — Crushing Middlegame

This puzzle is a classic crushing middlegame tactic built around king safety and active rook play. White’s king is exposed, the queen and rooks are overloaded, and one powerful rook invasion creates immediate tactical pressure. The key idea is that a seemingly strong defensive setup can collapse when the attacker uses forcing moves to open lines and exploit pins. In positions like this, material counts less than who controls the critical squares around the king.