“ Each player receives three cards, and three more are turned up as a “pool.” The first player may exchange one or two of his cards for one or two of the exposed cards, putting his own, face upwards, in their place. His object is to “make his hand” (see below) , but if he changes all three cards at once he cannot change again. The next player can do likewise, and so on. Usually there are as many rounds as there are players, and a fresh card is added to the pool at the beginning of each. If a player passes once he cannot exchange afterwards. ”