The complexities of rummy and Calchar's role Rummy is a well-known card game that has fascinated players for centuries all over the world. Forming sets and sequences with a standard deck ofrummy nobi cards is the fundamental aspect of the game. Combining cards into legitimate combinations is the goal; these can be sets of three or four cards of the same rank or sequences of three or more cards in the same suit in sequential order. The game can be played with two or more players, and its variants—Indian Rummy, Gin Rummy, & others—bring special twists to the basic rules.