Lajos Portisch (White) Puzzle: Fork — Win Material
A fork is a powerful chess tactic in which one piece attacks two or more valuable targets at once. In this chess endgame, White’s knight can exploit the exposed king and a vulnerable rook, creating a decisive material gain despite Black’s extra material and dangerous passed pawns. The key idea is to use a forcing check to place the knight on an active outpost, where it attacks multiple targets and leaves the rook with no safe escape.