Figure[White to move]

Second, sometimes you will not have even a potential fork because your opponent’s pieces are not arranged for it; there are no two enemy pieces that your knight can attack in one move. Thus in the diagram to the left, White cannot deliver a fork, but he could if he were able to get Black’s king to move over a square onto g8. In cases like this it sometimes is possible to draw enemy pieces onto forkable squares with some forcing moves—most often with a check or two. Later we will consider the clues that such possibilities for manipulation may exist and how they can be brought to fruition.