Understanding Rummy: A Complete Guide The popular card game of rummy has enthralled players worldwide with its unique combination of strategy, skill, & a dash of luck. Forming mad slotssets & runs from the cards dealt to each player is the fundamental idea of the game. A run is a series of three or more cards in the same suit, whereas a set is made up of three or four cards of the same rank but different suits. When another player goes out, the goal is to meld these combinations and reduce the total value of unmelded cards in hand.