Middlegame Puzzle (Rated 1360): Win Material — Fork

A classic middlegame tactical pattern occurs when one enemy piece attacks two valuable targets at once. Here, Black’s active bishop creates a fork against White’s rook and knight, but the position contains a tactical refutation: White can exploit an undefended rook and transform a material deficit into a decisive advantage. The key lesson is that a fork is not always decisive when the attacking piece or another valuable unit is itself vulnerable.