Learn How to Fork: Winning Material
This puzzle comes from the Slav Defense and shows how a well-placed knight can create a tactical fork against multiple targets at once. White’s active pieces and central control look strong, but the position contains a hidden refutation that turns the tables immediately. The key idea is to notice when a piece is overextended, undefended, or tied to another defender, because that often creates a forcing tactical sequence and a decisive material gain.