Learn How to Fork: Decisive Material Gain
This puzzle shows a classic opening tactic in the Queen's Gambit Declined where a knight fork creates a decisive material swing. The key idea is that an active knight can jump into a central square with tempo, attacking multiple high-value targets at once. In positions like this, the king’s limited mobility and loose pieces make the fork especially powerful. Even when one side is materially ahead, tactical coordination can collapse quickly if key pieces are left undefended.