Modern Defense Sacrifice Beginner Puzzle (Rated 863): Spot Mate in 2 — Queenside Attack

This middlegame puzzle is a classic example of a forcing queenside attack that converts activity into a direct mating net. White’s rook activity on the a-file creates immediate pressure against the black king’s shelter, while the queen and rook coordinate to exploit the weakened back rank and loose defenders. The key idea is not to win material slowly, but to use a sacrifice to open lines and force the king into a helpless position.