Vant Kruijs Opening Puzzle (Rated 1111): Fork — Win Material
This middlegame puzzle demonstrates how a knight fork can overturn the evaluation in a single tactical sequence. Black is under pressure from White’s extra space and material, but White’s central pawn structure contains a tactical weakness. By capturing an undefended pawn, the knight reaches an active outpost and attacks two valuable targets at once: the queen and a rook. The resulting tactical refutation converts a difficult position into a decisive material advantage.