Dynamic tactics occur when an attack involves more than one of the opponent’s pieces. They are the most common tactics in chess. They happen all the time, if you know what to look for.
A fork tactic happens when one piece attacks two pieces at the same time. While the opponent is busy moving or saving one piece, you can capture the other piece. He cannot save both. When one of the forked pieces is the king, there is no choice about which piece to save. The king must get out of check. To find a fork tactic, look for one piece that can attack two pieces at the same time. Every piece can do a fork, even the king, but it happens most often with a queen, a knight or a pawn.