Hong Kong Mahjong · 1 fan
Concealed Hand (Mun Chin Ching) in Hong Kong Mahjong: Fan, Examples and Odds
In Hong Kong mahjong, a Concealed Hand (門前清) is worth 1 fan: from the deal to the win you never chowed, punged or declared an exposed kong — every tile came from your own draws.
In Hong Kong scoring it counts on a discard win too; self-drawing adds Self-drawn (1 fan) on top.
On this page
The rules for Concealed Hand
- No chow, no pung, no exposed kong (an added kong needs a pung first, so it breaks it too)
- Concealed kongs are fine: all four tiles were self-drawn
- Discard win or self-draw both count, even if the winning tile is someone's discard
- Any shape: chows, pungs, Mixed One Suit, Pure One Suit can all be concealed
How Concealed Hand is scored
The fan below are computed live by the same scoring code the game uses.
Won on a discard
| Concealed hand (門前清) | 1 |
| Dragon pung (三元牌) | 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 |
| 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 |
| No flowers (無花) | 1 |
| Total | 3 fan |
|---|
Anything over 10 fan scores 10 (the limit).
Common combinations:
| Combination | Fan |
|---|---|
| Concealed Hand | 1 fan |
| Concealed + All Chows + No Flowers | 3 fan |
| Concealed + Self-drawn + No Flowers | 3 fan |
| Concealed + Self-drawn + All Chows + No Flowers | 4 fan |
| Concealed + Self-drawn + Pure One Suit | 9 fan |
How it relates to other hands
- Self-drawn: scored separately (1 fan), so a concealed self-draw is 2 fan.
- All Chows and No Flowers: Concealed + All Chows + No Flowers is the most common 3-fan hand.
- Four Concealed Pungs: concealed with four self-drawn pungs is a limit hand, scored at the limit instead.
- Nine Gates: must be concealed — not even a concealed kong.
- Thirteen Orphans: can't chow or pung, so always concealed, but it's a limit hand scored at the limit.
Concealed Hand odds
Over 100,000 computer hands on this site, Concealed Hand appeared in 59% of wins. Concealed wins averaged 3.2 fan and 51% of them were self-drawn; across all wins the self-draw rate was 55%.
| Fan | Share of wins |
|---|---|
| 3 fan | 73% |
| 4 fan | 20% |
| 5 fan | 4.6% |
| 6 fan | 1.2% |
| 7 fan | 0.60% |
| 8 fan | 0.48% |
| 9 fan | 0.16% |
| 10 fan · Limit | 0.42% |
Source: 100,000 hands of computer play on this site (Normal level, 3-fan minimum, 10-fan limit).
The 3-fan minimum makes Concealed especially valuable: with no scoring honours and no one-suit hand, it's the easiest fan to keep, so the computers often decline a chow.
When to stay concealed
- No fan in hand: without scoring honours or a one-suit plan, opening up leaves only small fan like All Chows and No Flowers — easily short of 3. Concealed is worth keeping.
- A claim that makes you ready: if a chow puts you ready and you still have enough fan, take it — speed beats the 1 fan.
- Already building something big: going for Mixed One Suit or All Pungs, Concealed doesn't matter much — claim what you need.
- Concealed kongs are free: they keep the hand concealed and give an extra draw, with a chance of Win on a Kong.
To try it, open a table of online Hong Kong mahjong — the computers play with you and count the fan for you.
Concealed Hand in other mahjong styles
Taiwanese and Japanese mahjong also reward a concealed hand, with different conditions and values — see the Taiwanese mahjong tai list and the Japanese mahjong yaku list.
FAQ
How many fan is a Concealed Hand?
In Hong Kong mahjong a Concealed Hand is worth 1 fan. No chows, pungs or exposed kongs — on a discard or a self-draw.
Does a concealed kong break a Concealed Hand?
No. All four tiles of a concealed kong are self-drawn, so you keep it; exposed and added kongs do break it.
How many fan is a concealed self-draw?
Concealed (1 fan) plus Self-drawn (1 fan), and with No Flowers 3 fan in total — exactly the 3-fan minimum.
Does a discard win count as Concealed?
Yes. Hong Kong's Concealed Hand doesn't require a self-draw; winning on someone's discard still counts.
Related hands
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.
All Chows 1 fan
Four chows and a pair is 1 fan: how it differs from a chicken hand, open hands, building 3 fan, and how common it is.
Four Concealed Pungs Limit
All Pungs with every pung self-drawn: a limit hand. Winning on a discard still counts on a pair wait, not on a two-pair wait.
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.