Queen Fork Puzzle (Rated 1371): Fork — Win Material
A fork is a tactical move that attacks two or more targets at once, often combining a check with an attack on a valuable piece. In this middlegame, White uses the knight to create a forcing threat against the king while simultaneously targeting a rook. The check limits Black’s replies, and the attacked rook has no safe escape. This is a classic example of turning active piece placement and king pressure into a decisive material gain.