Fork Advanced Puzzle (Rated 876): Fork — Win Material

A fork is a tactical move that attacks two or more valuable targets at once. In this chess endgame, White must recognize that the opposing king and knight can be attacked simultaneously, turning an immediate threat against a rook into a decisive material gain. The key idea is to use an active rook with check, forcing the king to respond while leaving the knight unable to escape safely. This is a classic example of tactical awareness overcoming short-term pressure.