# What Is a Run in Mahjong Island?

**Quick answer:** In Mahjong Island, a Run is three numbers in a row, all in one suit, such as all Dots. A Run stops at 9 and never wraps back to 1.

Source: https://mahjongisland.com/blog/what-is-a-run-in-mahjong · Mahjong Island · Updated 2026-10-29

A Run in Mahjong Island is three numbers in a row, all in one suit. One suit means one family of numbered tiles, for example all Dots. To meet each suit, read [Mahjong Island Tiles Explained](/guides/mahjong-tiles).

[A Run](https://mahjongisland.com/learn/run)

## How is a Run different from a Set?

A Set is three matching tiles, like three 7 Dot tiles. A Run moves up by one each step, in one suit.

Tiles: 7 Dot, 7 Dot, 7 Dot. A Set: three 7 Dot tiles.

## Where do numbers in a row show up on the Island Card?

You win by completing one hand on the Island Card. That hand is 14 tiles that match one line on the card. Some lines ask for numbers in a row, like 1-2-3-4-5. Each of those numbers is a Single, one tile on its own.

## Can a Run go from 9 back to 1?

No. A Run stops at 9. Numbers in a row go 1 to 9 and never wrap back around to 1.

[Runs don't wrap around](https://mahjongisland.com/learn/no-wrap)

## A simple tip: Jokers cannot fill a Single

A Joker can stand in for a tile in a Set, like two 5 Crak tiles and a Joker. It can never stand in for a Single or a Pair. Each number in a row is a Single, so you need the real tile for every number.

To see full lines from the card, read [Mahjong Island Winning Hands](/guides/mahjong-winning-hands). To learn how Jokers work, read [Mahjong Island Jokers](/guides/mahjong-jokers-and-card-drops).

Mahjong Island is free at mahjongisland.com. You can play a hand against 3 bots in your browser, with no sign-up and no download.

[Play a hand free](https://mahjongisland.com/play?new=1)

## Frequently asked questions

### Does a Run have to be in one suit?

Yes. In Mahjong Island, a Run is three numbers in a row, all in one suit.

### Is 8, 9, 1 a Run?

No. A Run stops at 9 and never wraps back around to 1.

### Can a Joker fill a number in a row?

No. Numbers in a row are Singles, and a Joker can never fill a Single.