Queens Pawn Game Accelerated London System Sacrifice Puzzle (Rated 1204): Spot Back Rank Mate — Mate in 3

This puzzle shows a classic back rank mate pattern in a middlegame setting. White’s heavy pieces coordinate to exploit the enemy king’s limited escape squares and the overloaded back rank. The key idea is that a forcing sacrifice can drag the defending rook away from its best defensive role, opening a direct mating net. Even though material is down, the attack wins because the king is boxed in and every tempo matters.