Knight Fork Puzzle (Rated 1207): Fork — Win Material

A fork is a tactical move that attacks two or more valuable targets at once, often forcing the opponent to lose material. In this chess endgame, piece activity matters more than the material count alone: an active knight can create a direct threat against the king while also attacking a rook. The key idea is to recognize when a seemingly vulnerable piece can move with tempo, turning the opponent’s attacking threat into a tactical refutation.