Rat Defense Puzzle (Rated 1442): Win the Rat Defense — Tactical Refutation

This middlegame puzzle shows a classic tactical refutation in the Rat Defense: when the center is tense and the enemy king is still uncastled, one forcing move can collapse the position. The key idea is to exploit overloaded defenders and the fact that a pinned piece cannot protect everything at once. In positions like this, material balance can be deceptive because king safety and piece coordination matter more than raw count.