What is a run in Rummy?
The run is the meld that rewards patience: you are stringing together a ladder of same-suit cards, and the longer it gets, the more of your hand becomes safe.
What makes a valid run
A run is three or more cards of one suit in unbroken sequence, such as 9-10-Jack of spades. You can extend it as far as the cards allow, so 5-6-7-8 of hearts is a single four-card run. Every card in a run must be the same suit - mixing suits breaks it.
Where the Ace sits
Run vs. set
A run needs consecutive ranks in one suit; a set needs matching ranks across suits. A run with no wild card standing in for a missing rank is called a pure sequence, which matters a lot in Indian Rummy. See the set versus run answer for more.
Related questions
What is a set in Rummy?
A set is three or four cards of the same rank, each from a different suit - for example, the 8 of hearts, 8 of spades and 8 of clubs. Sometimes called a group or a book, it is one of the two ways to build a meld, alongside the run. You can never have more than four cards in a set because there are only four suits.
What is a pure sequence in Rummy?
A pure sequence is a run - three or more consecutive cards of the same suit - formed without any joker or wild card standing in for a missing card. It matters most in Indian Rummy, where a valid declaration must include at least one pure sequence. A run that uses a wild to fill a gap is called an impure sequence instead.
What is the difference between a set and a run?
A set is three or four cards of the same rank in different suits, like three Kings. A run is three or more consecutive cards all of the same suit, like the 5-6-7 of hearts. A set matches on rank and ignores suit; a run matches on suit and needs consecutive ranks. Both are valid melds that clear cards from your deadwood.