Russian Game Paulsen Attack Puzzle (Rated 853): Win Material — Fork Tactics

This middlegame puzzle is a clean example of how active piece placement can create a decisive material gain. Black’s bishop invades with tempo, checking the king and forcing a response that leaves White’s rook vulnerable. The key idea is not a flashy attack on the king, but a tactical sequence that wins a major piece by combining check, piece activity, and a trapped rook. In classical chess, these patterns often appear when one side is ahead in development and can exploit loose coordination.