Under ordinary circumstances, Black would play in one square, and White would then play in the other. This is often good for White, and Black would usually prefer to be able to play both of the remaining moves if possible. In some of the following positions, Black can swindle White by playing both moves. You should be able to answer these questions easily by setting up the positions shown and trying both moves. But you should try to solve them in your head first.
Solutions are here .
Diagram 1 Solutions . Diagram 2 Solutions . Diagram 3 Solutions . Diagram 4 Solutions . Diagram 5 Solutions .