Sichuan Mahjong · 1 fan
Win After a Kong (Gang Shang Kai Hua) in Sichuan Mahjong: Fan, Examples and Odds
In Sichuan mahjong, a win after a kong (槓上開花, gang shang kai hua — "blossom on the kong") adds 1 fan: after you kong, you draw a replacement tile from the wall, and it completes your hand for a self-draw. A kong is four of a kind, so it always brings a root as well: a win after a kong is at least 2 fan, and each payer pays 4 units (plus the self-draw bonus).
On this page
The rules for a win after a kong
- You've just konged (exposed, upgraded or concealed) and drawn the replacement tile
- That replacement tile completes your hand, as a self-draw
- If you don't win on it and discard, the chance is gone
- Like every Sichuan win, you can't hold your void suit
Who pays
A win after a kong is a self-draw: every player still in the hand pays, and under the default rule each pays another 1 unit (the self-draw bonus). The kong payment is collected on the spot as usual:
| Kong type | Kong payment on the spot | After the win |
|---|---|---|
| Concealed ("rain") | 2 units from each player | each player also pays for the win |
| Upgraded ("wind") | 1 unit from each player | each player also pays for the win |
| Exposed | 2 units from the discarder | each player also pays for the win |
How a win after a kong is scored
Fan add up, and each extra fan doubles the payment, up to the cap of 4 fan. The hands below are scored live by the same code the game uses (the self-draw bonus and kong payments come on top).
Self-drawn
| Root (根) | 1 fan |
| Win after a kong (槓上開花) | 1 fan |
| Total | 2 fan |
|---|---|
| Each payer pays 4 units | |
Units = 2 to the power of fan, up to the cap. Self-draw bonus and kong payments come on top.
Self-drawn
| All pungs (對對胡) | 1 fan |
| Root (根) | 1 fan |
| Win after a kong (槓上開花) | 1 fan |
| Total | 3 fan |
|---|---|
| Each payer pays 8 units | |
Units = 2 to the power of fan, up to the cap. Self-draw bonus and kong payments come on top.
Common combinations:
| Combination | Fan | Each payer pays (plus self-draw bonus) |
|---|---|---|
| Win after a kong + root | 2 | 4 units |
| + All Pungs | 3 | 8 units |
| + pure one suit | 4 | 16 units |
| + last-tile self-draw (the replacement was the last tile) | 3 | 8 units |
How it relates to other hands
- Root: a kong means four of a kind, so a win after a kong always has a root — two separate fan, not double counting.
- Deal-in after a kong: if the replacement doesn't win and your discard lets someone else win, they get the bonus fan and you pay.
- Robbing a kong: if someone robs your upgraded kong, there's no replacement draw and no blossom.
- Last-tile self-draw: if the replacement is the last tile of the wall and you win on it, both fan add.
- Seven Pairs: Seven Pairs must be concealed with no kongs, so it never has a win after a kong.
Win after a kong odds
In 40,000 hands of normal computer play there were 0.7 kongs per hand on average, and each kong had a 3.4% chance of blossoming straight away. Wins after a kong were 0.88% of all wins — about once every 40 hands — averaging 2.2 fan, with each payer paying 5.1 units.
| Bonus fan | Share of wins |
|---|---|
| Win after a kong (槓上開花) | 0.88% |
| Deal-in after a kong (槓上炮) | 1.3% |
| Robbing a kong (搶槓胡) | 0.18% |
| Last-tile self-draw (海底撈月) | 0.30% |
| Last-tile discard (海底炮) | 0.31% |
| Heavenly hand (天胡) | 0.019% |
| Earthly hand (地胡) | 0.03% |
Source: 40,000 hands of computer play on this site (four normal-level players, 115,067 wins in total), cap 4 fan.
Players who kong are often already ready: the replacement tile is simply an extra chance to self-draw.
When to kong
- When you're ready: a kong gives you one more draw; hit it and it's a win after a kong, with a root on top.
- Concealed kongs almost always: 2 units from each player on the spot, can't be robbed, and an extra draw.
- Check before upgrading a pung: someone may be waiting on that tile; if they rob the kong you lose the kong money and pay for their win.
- Not when going for Seven Pairs: a kong breaks concealment.
To try it, open a table of online Sichuan mahjong — the computers play blood battle with you and count the fan for you.
Win after a kong in other mahjong styles
Almost every style rewards self-drawing the kong replacement:
- Taiwanese mahjong: 1 tai (Taiwanese mahjong scoring)
- Japanese mahjong ("Rinshan Kaihou"): 1 han (Japanese mahjong yaku list)
- Hong Kong mahjong: 1 fan (Hong Kong mahjong fan list)
- Chinese Official (Guobiao) "Out with Replacement Tile": 8 fan (Guobiao fan list)
FAQ
How many fan is a win after a kong?
It adds 1 fan, and the kong always brings a root, so it's at least 2 fan: each payer pays 4 units, plus the self-draw bonus.
Who pays for a win after a kong?
On this site it's a self-draw: every player still in the hand pays. Some tables make the player who fed an exposed kong pay alone — agree before you play.
Do concealed, upgraded and exposed kongs all count?
Yes. A self-draw on the replacement tile after any kind of kong is a win after a kong.
Are the win after a kong and the root counted separately?
Yes. One is the situational fan for self-drawing the replacement, the other is the pattern fan for four of a kind — one fan each.
Related hands
Deal-in After a Kong 1 fan
Kong, replacement, discard — and someone wins on it: 1 fan for the winner, and the kong money moves to them.
Robbing a Kong 1 fan
Win on the tile someone adds to upgrade a pung: 1 fan; only upgraded kongs can be robbed, the konger pays and the kong doesn't stand.
Root 1 fan
All four copies of a tile in your hand adds 1 fan: examples, no kong needed, stacking roots, and how common they are.
Try it at the table
Sichuan Mahjong — Play Sichuan mahjong “blood battle” free in your browser against three computer opponents. 108 tiles, swap three, pick a void suit, pung and kong, and keep playing after someone wins. Automatic fan scoring, no sign-up.