Players in Indian Rummy, for example, must form at least two sequences using two decks, one of which must be pure (i.e., devoid of a joker). Your strategy will apps and gamesbe more appropriately tailored if you are aware of these particular requirements. Also, some variations add new components, like point systems or particular guidelines for the formation of melds. Knowing these subtleties will help you play better and read opponents who might be more used to some variations than others.