variations with special twists. Gin Rummy Nabob is a well-liked variant that involves two players and extra rules like knocking when a player thinks they have formed sets aindian app listnd runs in their hand. Indian Rummy Nabob is a different variant where jokers are used as wild cards and two decks of cards are used. Increasing Intricacy and Strategy. Contract Rummy Nabob adds a new level of strategy and intricacy to the game by introducing specific contracts that players must fulfill in order to score points in each round.