Straits MahjongMen Qing Zi Mo 门清自摸
Men Qing Zi Mo is a win with nothing claimed, on a tile you draw yourself. It is worth 1 tai in Singapore Mahjong.
Keep every set in your hand, then draw the winning tile yourself. Men Qing Zi Mo is the small reward for patience, and it turns up in far more wins than you’d think.
What It Is
Men Qing (门清, “clean door”) means a hand with nothing claimed: no Chi, no Pong and no Kong taken from another player’s discard. Zi Mo (自摸) means you drew the winning tile yourself from the wall.
Put the two together and you earn an extra tai. It isn’t a hand shape at all, so it adds to whatever else you’ve made: Ping Hu, a flush, Pong Pong Hu or plain sets.
- Bonus tiles don’t open your hand. Flowers, seasons and animals are set aside, not claimed.
- A concealed Kong doesn’t open it either, as standard. Four of a tile you drew yourself still counts as concealed.
- One claim ends it. A single Chi or Pong, even early, and the hand is no longer Men Qing.
What It Pays
| Table | Called | Worth |
|---|---|---|
| Singapore | Men Qing Zi Mo | 1 tai |
| Riichi | Menzen Tsumo | 1 han, closed only |
At a Singapore table, Men Qing Zi Mo is worth 1 tai. It shines alongside Ping Hu: 4 tai for the shape plus this, drawn yourself, is the usual 5 tai.
The flip side matters too. Won on a discard, a concealed hand earns nothing extra. A hand whose only tai would be Men Qing can win by Zi Mo, but can’t win on someone else’s throw at a table that needs 1 tai. The game tells you when that’s why a win isn’t on offer.
The Concealed Hand House Rule
Tables disagree about this tai, so when you start a Scored Hand or Full Match at the Singapore table, House Rules gives you three choices for it:
- Zi Mo Only (the standard): the tai comes only when you draw the winning tile yourself.
- Any Win: a concealed hand earns it on a discard too. It’s still one award, never two: drawing it yourself doesn’t add a second.
- Not Scored: no tai for a concealed hand at all.
A separate House Rule, Concealed Kong Opens The Hand, counts a concealed Kong as a set shown. Switch it on and a hand holding one earns neither Men Qing nor Kam Kam Hu.
When To Stay Closed
Staying concealed is worth it when your hand is already close and the claim on offer would only save one turn. It also hides your plan: a closed hand gives the table nothing to read.
Claim when the hand is slow, when you need the set for your tai, or when the wall is running short. A win with a claim beats a concealed hand that never finishes.
At Other Tables
Hong Kong gives nothing for a concealed hand, though Zi Mo itself is a faan there for anyone. Malaysian 3 Kaki gives no fan for it either, on Zi Mo or a discard.
In Riichi, Menzen Tsumo is 1 han, closed only, and it counts as a yaku: a closed hand that draws its own winning tile always has the yaku it needs to win.