Learn How to Fork: Decisive Material Gain
This puzzle comes from the Queen's Gambit Declined, Chigorin Defense, and it shows how a knight fork can turn a normal-looking middlegame into a decisive material win. Black’s knight jumps into the center with tempo, checking the king while simultaneously attacking multiple heavy pieces. In classical chess, these tactical shots often appear when the opponent’s king is still in the center and the pieces are loosely coordinated. The key idea is to use forcing moves to create a fork and then convert the gain cleanly.