Learn How to Use an Intermezzo: Endgame Fork
This chess endgame puzzle is a classic example of how a forcing move can change the evaluation immediately. The key idea is to use a check or other tempo-gaining move to pull the king onto a vulnerable square, then follow with a knight fork that wins material. In classical chess, these sequences often work because one piece is pinned, another is hanging, and the king has limited escape squares. The result is a decisive tactical gain rather than a slow positional squeeze.