Learn How to Fork: Decisive Material Gain
This puzzle comes from the Elephant Gambit Paulsen Countergambit and shows a classic tactical refutation based on a knight fork. Black’s active knight jumps into the center with check, creating immediate pressure on the white king, queen, and rook at once. The key idea is not a flashy mate, but decisive material gain: the checking move forces the king to respond, and that tempo lets Black win the queen with a follow-up capture. It is a strong example of how tactical activity can outweigh static material.