In order to end the round & score points based on the value of unmelded cards in your opponent's hand, you must first form sets & runs in yocasino mobile slotsur hand before you "knock.". 2. Commonly referred to as 13 card rummy, Indian Rummy is a popular variant played primarily with two decks of cards in India. It is required of the players to form a minimum of two sequences, one of which has to be a pure sequence devoid of jokers.