Four concealed triplets 四暗刻 · suu ankou
Four triplets, all formed without calling.
| Value | Yakuman (closed hands only) |
|---|---|
| How often | very rare |
The seed is usually a hand carrying three or four pairs plus a concealed triplet by the middle turns. Pairs are the raw material, and the rule is patience: every pon converts a concealed triplet into an open one, dropping the ceiling from yakuman to toitoi plus sanankou. If you want suuankou, the triplets have to arrive on your own draws.
The wait decides everything. On a shanpon シャンポン wait — two pairs, either one completing a triplet — tsumo delivers the yakuman but ron does not, because a triplet finished by another player's discard doesn't count as concealed. Win by ron there and the hand settles as sanankou plus toitoi. A tanki 単騎 pair wait carries no such asterisk: all four triplets are already complete in your hand, so any win counts. When the draws let you choose, shifting to tanki is usually worth it.
The fallback still pays, which is some comfort. Ron on the shanpon and you keep sanankou, toitoi, and a stack of triplet fu — see how fu work — a big hand by any everyday standard. The classic mistake runs the other way: calling pon on a second or third triplet out of habit, trading a live yakuman chance for a merely good hand.
Key points
- Winning by ron on the fourth triplet does not count — that triplet becomes “open” for this purpose; you need tsumo or a tanki (pair) wait
- The tanki-wait version is a double yakuman in many rules
- The realistic yakuman most players hit first, via toitoi-shaped hands
Tanki-wait double yakuman: common in Japanese rules; WRC scores all yakuman as single.
Related yaku
- Three concealed triplets 三暗刻 — Three triplets you completed yourself, without pon — the rest of the hand can be open.
- All triplets 対々和 — A hand of four triplets (or kans) and a pair — no sequences at all.
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