In some games, especially two-player games, after each trick every player draws a new card. This continues while the stock lasts. Since this drawing mechanism would normally make it difficult or impossible to detect a revoke (for instance, the player may not be able to follow suit, so they play off-suit and then immediately draw a card of the suit led), in the first phase of trick-play (before the stock is empty) players generally need not follow suit. A widespread game of this type is the Marriage group.