Petrov's Defense Modern Attack Puzzle (Rated 943): Win with a Fork — Decisive Material Gain

This middlegame puzzle is a classic example of using king safety and piece activity to force a decisive material gain. White’s attacking pieces are already deep in the enemy camp, creating threats against the king and loose defenders. The key idea is to use a forcing move that checks the king while also creating a tactical fork on the queen and another valuable target. In classical chess, these double threats often decide the game immediately because the defender cannot cover both problems at once.