Englund Gambit Complex Declined Puzzle (Rated 853): Win with a Fork — Decisive Material Gain

This middlegame puzzle is a classic example of a knight fork creating a decisive material gain. Black’s active knight jumps into the heart of White’s position, attacking multiple high-value pieces at once and forcing the king to respond. The key idea is that the king’s limited mobility makes the tactic work: once the king is checked, White cannot calmly defend everything. The resulting sequence wins material and leaves Black with a dominant advantage.