Jokers may be used as wild cards in some variations, but the game usually uses a standard 52-card deck and can be played with two or more players. Depending on the version of Rummy being played, the rules can charoyal rummynge considerably. In Indian Rummy, for example, players must form a minimum of two sequences, one of which must be a pure sequence (i.e., devoid of a joker). In contrast, Gin Rummy focuses on creating sets and runs while minimizing the points in unmelded cards. Any player hoping to succeed in rummy must comprehend these fundamental concepts since they determine the strategies and tactics that can be used while playing.