Difference between revisions of "Ryanpeikou"

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==Value==
 
==Value==
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Closed only, ryanpeikou is always at 3 han.  So, there is no need to be concerned about a lesser value of the hand while open, or [[kuisagari]].  The cheapest ryanpeikou hand uses either a [[kanchan]] (closed) or [[tanki]] (pair) [[machi|wait]].  In both cases, the hand produces a 3-han and 40-fu value by ron.  By tsumo, it is 3-han and 30-fu.
  
 
==External links==
 
==External links==

Revision as of 23:02, 10 December 2014

Ryanpeikou
Type Yaku
Kanji 二盃口
English Two sets of identical sequences
Value 3 han (closed only)
Speed Very slow
Difficulty Very hard
Example(s)
More examples

Ryanpeikou (二盃口) is a standard yaku, consisting of two "iipeikou". The prefix "ryan" is a Japanese counter for mahjong, signifying for "two".

Tile pattern

Tile-2p.pngTile-2p.pngTile-3p.pngTile-3p.pngTile-4p.pngTile-4p.pngTile-6m.pngTile-6m.pngTile-7m.pngTile-7m.pngTile-8m.pngTile-1z.pngTile-1z.png Agari: Tile-8m.png

Note: This hand may also win with Tile-5m.png. However, it'll only count for a lesser value of pinfu and iipeikou.

Formation

At the very least, the hand must initially qualify for the yaku, iipeikou. With tenpai, the tile wait involves a tanki, to complete the pair, or the need to complete the other "iipeikou".

Compatability

^ Ippatsu requires riichi to be of any use.

RCH DRI IPP^ SMO TAN PFU IPK ITT YAK SDJ SDO TOI SNA SNK CHA JUN RPK SSG HRO HON CHN CHI RIN HAI HOU CHK
RPK 13 green check.png 13 green check.png 13 green check.png 13 green check.png 13 green check.png 13 green check.png 13 red x.png 13 red x.png 13 red x.png 13 red x.png 13 red x.png 13 red x.png 13 red x.png 13 red x.png 13 green check.png 13 green check.png 13 red x.png 13 red x.png 13 green check.png 13 green check.png 13 red x.png 13 red x.png 13 green check.png 13 green check.png 13 red x.png

Chii toitsu

This yaku does not combine with chiitoitsu. By definition, chiitoitsu is formed by the collection of seven pairs. At every instance, ryanpeikou hands look like chiitoitsu hands. However, ryanpeikou is actually composed of sequences, rather than as independent pairs. The pattern simply appears as a collection of pairs. Because of this interpretation, the two yaku remain distinct and incompatible; and it is doubtful, that any house rule allows the combination of the two yaku.

With chinitsu

Some forms of ryanpeikou mixed with chinitsu and tanyao may actually form some optional yakuman, named daisharin (pinzu), daichikurin (souzu), and daisuurin (manzu).

Tile-2s.pngTile-2s.pngTile-3s.pngTile-3s.pngTile-4s.pngTile-4s.pngTile-5s.pngTile-5s.pngTile-6s.pngTile-6s.pngTile-7s.pngTile-7s.pngTile-8s.png Agari: Tile-2s.png, Tile-5s.png, or Tile-8s.png

Value

Closed only, ryanpeikou is always at 3 han. So, there is no need to be concerned about a lesser value of the hand while open, or kuisagari. The cheapest ryanpeikou hand uses either a kanchan (closed) or tanki (pair) wait. In both cases, the hand produces a 3-han and 40-fu value by ron. By tsumo, it is 3-han and 30-fu.

External links

Ryanpeikou in Japanese Wikipedia