Ryanpeikou (二盃口)
3 han
Two pairs of identical chows. Closed hands only.
How Ryanpeikou (二盃口) works
Two separate pairs of identical sequences — four runs forming two matched sets, such as two of 2-3-4 pin and two of 6-7-8 sou.
Ryanpeikou is the doubled form of iipeikou: the hand's four sequences split into two pairs of duplicates, leaving only the pair as the fifth element. It is strictly a closed-hand yaku and is incompatible with toitoi since it is built entirely from runs. Because all four sets are chows, it pairs naturally with pinfu and the flushes.
Good to know
- •Closed hand only; any called sequence breaks it.
- •It supersedes iipeikou rather than stacking with it; you score this instead of iipeikou twice.
- •The hand must consist of four sequences plus a pair, so it cannot coexist with any triplet.
Ryanpeikou (二盃口) — FAQ
Is ryanpeikou just two iipeikou?
Structurally yes, but it is scored as its own single yaku rather than counting iipeikou twice.
Can ryanpeikou and pinfu occur together?
Yes. Both are all-sequence closed-hand patterns, so a suitable hand can satisfy both at once.
Other 3-han yaku