Scandinavian Defense Mieses Kotroc Variation Puzzle (Rated 1102): Fork the Queen
A fork is one of the most punishing weapons in middlegame play: a single piece attacks two enemy men at once, forcing the defender to give up one of them. Knights are the classic forking machine because they attack squares of both colors and cannot be captured by the pieces they attack. When your opponent's queen ventures deep into your camp, she often lands on a square that shares a knight's jump with the enemy king. Greet the intrusion with a checking fork: the king must respond, and the queen is lost.