Hong Kong Mahjong · 1 fan
Win on a Kong (槓上開花) in Hong Kong Mahjong: Fan, Examples and Odds
In Hong Kong mahjong, Win on a Kong (槓上開花, "a flower blooms on the kong") is worth 1 fan: after you declare a kong you draw a replacement tile from the back of the wall, and if that tile completes your hand, it's Win on a Kong.
It is always a self-draw, so it comes with Self-drawn (1 fan) — at least two fan; one more and you reach the 3-fan minimum.
On this page
The rules for Win on a Kong
- All three kongs count: an exposed kong (claiming the fourth tile from a discard), an added kong (adding a drawn fourth tile to your pung) and a concealed kong (all four drawn yourself)
- The winning tile must be the replacement drawn after the kong
- An added kong must survive Robbing a Kong first: if someone robs it, you get no replacement
- If the replacement is a flower, you expose it and draw again; winning on that next tile still counts as Win on a Kong
- Flower replacements alone don't count: if a normal draw is a flower and its replacement wins, this site scores only Self-drawn
- If you discard after the kong and someone wins on it, there's no extra fan on this site (Sichuan mahjong calls that "gang shang pao")
How Win on a Kong is scored
The fan below are computed live by the same scoring code the game uses.
Self-drawn
| Self-drawn (自摸) | 1 |
| Win on a kong (槓上開花) | 1 |
| No flowers (無花) | 1 |
| Total | 3 fan |
|---|
Anything over 10 fan scores 10 (the limit).
Self-drawn
| Concealed hand (門前清) | 1 |
| Self-drawn (自摸) | 1 |
| Dragon pung (三元牌) | 1 |
| Win on a kong (槓上開花) | 1 |
| No flowers (無花) | 1 |
| Total | 5 fan |
|---|
Anything over 10 fan scores 10 (the limit).
Common combinations:
| Combination | Fan |
|---|---|
| Win on a Kong + Self-drawn | 2 fan |
| Win on a Kong + Self-drawn + No Flowers | 3 fan |
| Concealed kong: Win on a Kong + Concealed hand + Self-drawn | 3 fan |
| Win on a Kong + Last Tile + Self-drawn | 3 fan |
Who pays
This site treats Win on a Kong as an ordinary self-draw: each of the other three pays one share.
Some tables play "kong bloom pays all" (槓上開花包自摸): if the kong was made by claiming someone's discard, that player pays all three shares. This site doesn't — agree on it before you start.
How it relates to other hands
- Self-drawn: Win on a Kong is always self-drawn; both count.
- Robbing a Kong: when you add a kong, others may rob that tile to win; only if nobody does do you get your replacement.
- Last Tile Win: if the replacement is also the last tile of the wall, both count.
- Four Kongs: the limit hand of four kongs — every kong is another chance to bloom.
- Concealed hand: a concealed kong doesn't open your hand, so a bloom after it keeps the Concealed hand fan.
Win on a Kong odds
We let four of this site's computers (Normal level) play 100,000 hands:
- Win on a Kong came up 1,041 times, 1.3% of all wins — roughly once every 96 hands.
- Wins with it averaged 4.0 fan.
It's luck, but kongs help: every kong gives you an extra draw, which is an extra chance to self-draw when you're ready. If you hold four of a kind and it doesn't hurt your wait, kong it. To try it, open a table of online Hong Kong mahjong — the computers play with you and count the fan for you.
Win on a Kong in other mahjong styles
- Sichuan mahjong: 1 fan, plus "gang shang pao" for a win on the discard after a kong (Sichuan mahjong Win on a Kong, Gang Shang Pao)
- Taiwanese and Japanese mahjong also reward a win on the kong replacement, scored differently: see the Taiwanese mahjong tai list and the Japanese mahjong yaku list
- Chinese Official (Guobiao): see the Guobiao fan list
FAQ
How many fan is Win on a Kong?
In Hong Kong mahjong it's worth 1 fan; with the Self-drawn fan it always brings, at least 2 fan.
Does a concealed kong count?
Yes. Exposed, added and concealed kongs all count, and a concealed kong keeps the Concealed hand fan too.
Does winning on a flower replacement count?
Not on this site — that's only Self-drawn. It has to be the replacement after a kong; but if that replacement is a flower and the next tile wins, it still counts.
Who pays for Win on a Kong?
On this site it's an ordinary self-draw: the other three pay one share each. Some tables make the player who fed the exposed kong pay everything — agree before you start.
Related hands
Robbing a Kong 1 fan
Win on the tile someone adds to their kong: 1 fan. Added kongs only, who pays, how it helps you reach the minimum, how often it happens.
Self-Drawn 1 fan
Drawing your own winning tile adds 1 fan: open hands count, who pays, stacking with Concealed and Win on a Kong, and how often it happens.
Four Kongs Limit
Four kongs and a single-wait pair: 18 tiles on the table, a limit hand and one of the rarest you'll ever see.
Try it at the table
Hong Kong Mahjong — Play classic Hong Kong (Cantonese) mahjong free in your browser against three computer opponents. 13-tile hands, flowers, 3-fan minimum, 10-fan limit and automatic fan scoring. No sign-up, works on phone and desktop.