Learn How to Win Material: Grunfeld Defense Fork
This puzzle comes from the Grunfeld Defense and shows how a long opening sequence can create a tactical advantage even in a seemingly balanced middlegame. White has active pieces and pressure on key central squares, but the position is tactically unstable because one piece is overextended and another is vulnerable to a forcing response. The main lesson is that activity alone is not enough: when a piece is pinned, attacked, or overloaded, a tactical shot can flip the evaluation quickly.