Chinese Official Mahjong · 88 pt

All Green in Chinese Official Mahjong (MCR): Points, Which Tiles, Examples

In Chinese Official Mahjong, All Green (绿一色) is worth 88 points: the whole hand — including claimed chows, pungs and kongs — uses only 2, 3, 4, 6 and 8 bamboo and the Green Dragon. Those six tiles are the ones printed in green only.

The rules for All Green

• Only these six tiles: 2, 3, 4, 6, 8 bamboo and Green Dragon
• 1, 5, 7 and 9 bamboo don't qualify (they have red on them), and neither do Red or White Dragon
• The only possible chow is 2-3-4 bamboo (every other run needs a 5 or a 7); the rest are pungs, kongs or the pair of these tiles
• The Green Dragon is optional; chows, pungs and kongs are allowed — no need to stay concealed
• Seven Pairs works too: seven pairs of green tiles (four 2 bamboo count as two pairs)

What All Green does not combine with

Under the non-repeat rule All Green does not also count Half Flush (6 points): with a Green Dragon it's bamboo plus an honor anyway.

The other way round, All Green without a Green Dragon is all bamboo, so Full Flush (24 points) still counts (and No Honors doesn't). Other fan that stack: All Pungs, All Simples (when there's no dragon), Pure Double Chow, Tile Hog, concealed pungs, Concealed Hand, Seven Pairs and so on.

How All Green is scored

Both hands below are scored live by the same code the game uses, including the fan left out under the non-repeat rule.

Common combinations:

How it relates to other fan

• Half Flush: All Green with a Green Dragon is always a bamboo Half Flush, which is why Half Flush isn't counted.
• Full Flush: All Green without the dragon is a bamboo Full Flush, and both count.
• Reversible Tiles: the other "which tiles you may use" fan, with a different tile list; 2, 4 and 8 bamboo appear in both.
• Dragon Pung: a Green Dragon pung still scores Dragon Pung.

All Green odds

There are six green kinds, 24 tiles in all. A 13-tile opening hand has 6 or more green tiles about 1.2% of the time, and 7 or more only about 0.19%:

Source: 1,000,000 random 13-tile deals (flowers already replaced).

In 4,000 hands of normal computer play on this site (3,849 wins), All Green came up 0 times. The computers don't steer for All Green, and the sample is too small for a reliable frequency.

Which hands can go for All Green

• Lots of bamboo, mostly 2 to 8: the fewer 1, 5, 7 and 9 bamboo, the better.
• Start on the Full Flush or Half Flush route: while building a bamboo flush, keep 2-3-4-6-8 and the Green Dragon and avoid 5s and 7s — sometimes it turns into All Green on the way.
• 2-3-4 is the only chow, so you mostly need pungs: pung 6s, 8s and the Green Dragon whenever you can.
• Falling short costs little: Full Flush (24) or Half Flush (6) still gets you to 8 points.

Want to try? Open a table of Chinese Official Mahjong online — the computers play with you and the scoring is done for you.

All Green in other mahjong styles

• Japanese mahjong: a yakuman (Japanese mahjong yaku list)

FAQ

How many points is All Green?

In Chinese Official Mahjong All Green is worth 88 points, and Half Flush is not counted with it.

Which tiles are green?

2, 3, 4, 6 and 8 bamboo and the Green Dragon. 1, 5, 7 and 9 bamboo, Red Dragon and White Dragon are not.

Does All Green need a Green Dragon?

No. Without it the hand is still All Green — and since it's then all bamboo, Full Flush adds another 24 points.

Can All Green be Seven Pairs?

Yes. Seven pairs of green tiles score both All Green and Seven Pairs, 112 points before anything else.

Related fan

Half Flush 6 pt One suit plus honors for 6 points — short of the 8-point minimum. How to top it up with dragon and wind pungs, and when to go for it. Full Flush 24 pt Every tile from a single suit for 24 points. Examples, the non-repeat rules, Half Flush vs Full Flush, and how many suited tiles you need. Reversible Tiles 8 pt Only the 14 tiles that look the same upside down: 8 points, no One Voided Suit, and it stacks with Seven Pairs, All Pungs and Half Flush.