A pure sequence is a set of three or more consecutive cards from the same suit, formed without using a joker. It is the first group to look for when organizing a 13-card hand.
The three checks
For a group to qualify, check each of these conditions:
- Three or more cards. Two consecutive cards are a start, but not a complete sequence.
- One suit. A 4♥, 5♥, 6♥ run works; mixing suits does not.
- No joker substitution. A printed or wild joker filling a missing rank makes the run impure.
8♣, 9♣, 10♣ are consecutive clubs with no joker.
8♣, joker, 10♣ uses a substitute card to complete the run.
Why it matters
In standard 13-card Indian Rummy, a valid declaration requires at least two sequences, and at least one must be pure. A set can help arrange the remaining cards, but it cannot replace that required natural sequence.
That makes a pure sequence a useful anchor. Once you find one, keep those cards together while you sort the rest of your hand into possible sequences and sets. Avoid breaking up a completed natural run for a speculative combination.
What about aces?
Aces may be used at the low or high end of a sequence, depending on the table rules, such as A-2-3 or Q-K-A. They do not wrap around to make K-A-2. Check the rules for the specific game you are playing.