Learn How to Mate in 2: Fork Mate
This middlegame puzzle is a classic example of a forcing tactical finish where the attacking side uses a queen check to drive the king into a boxed-in square. The key idea is not material gain, but coordination: the queen and supporting pieces restrict escape squares so the king is left with only one reply. In positions like this, a small tactical detail can turn a large material edge into immediate checkmate, which is why classical chess players value forcing moves so highly.