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Ryanpeikou: Difference between revisions
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|yakuSpeed = Very slow | |yakuSpeed = Very slow | ||
|difficulty = Very hard | |difficulty = Very hard | ||
| | |gameExample = * [http://tenhou.net/0/?log=2014042214gm-0009-7447-4c65a887&tw=2 Not ryanpeikou] | ||
* [ | * [http://tenhou.net/0/?log=2014012213gm-0009-0000-883e14e9&tw=3&ts=4 Ryanpeikou] | ||
* [ | * [http://tenhou.net/0/?log=2015050816gm-0089-0000-cc9341d1&tw=3&ts=1 Ryanpeikou] with [[tanki]] | ||
* [http://tenhou.net/0/?log=2014021501gm-00c1-0000-xa219696aa69a&tw=0&ts=1 With] [[chinitsu]] | |||
* [ | |||
}} | }} | ||
'''Ryanpeikou''' | '''Ryanpeikou''' {{kana|二盃口}} is a standard [[list of yaku|yaku]], consisting of two "[[iipeikou]]". The prefix "ryan" is a Japanese counter for mahjong, signifying for "two". | ||
==Tile pattern== | ==Tile pattern== | ||
{{#mjt: | {{#mjt:223344p66778m11s}} Agari: {{#mjt:8m}} | ||
''Note:'' This hand may also win with {{#mjt:5m}}. However, it'll only count for [[ | ''Note:'' This hand may also win with {{#mjt:5m}}. However, it'll only count for a [[yasume|lesser value]] of [[iipeikou]] (and [[pinfu]]). | ||
== | ==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". | |||
Like iipeikou, ryanpeikou requires the ''hand'' to be closed. Note that you are allowed to declare [[ron]], even if the ron'd tile completed the ryanpeikou, so long as the hand itself is closed. | |||
== | == Compatibility == | ||
{{main|Yaku compatibility}} | |||
{{Yaku compatibility table|RPK}} | |||
Ryanpeikou is incompatible with other yaku that place conflicting requirements on the [[mentsu]] in the hand. [[Ittsu]], [[sanshoku]], [[sanshoku doukou]], [[toitoi]], [[sanankou]], [[sankantsu]], and [[shousangen]] are excluded as they are require either three different sequences or at least one triplet/quadruplet. [[Rinshan kaihou]] also requires a kan, so it is excluded. [[Chankan]] is incompatible because the winning tile must be unique in the winning hand---all four copies of it having been used in another player's kan. Finally, [[iipeikou]] is incompatible because it is superseded by ryanpeikou. | |||
=== Chiitoitsu === | |||
This yaku cannot combine with [[chiitoitsu]]. By definition, chiitoitsu is formed by the collection of seven distinct pairs. In most instances of ryanpeikou, the hands look like chiitoitsu hands. However, ryanpeikou is actually composed of [[mentsu#shuntsu|sequences]], rather than as independent pairs. Because of this interpretation, the two yaku remain distinct and incompatible. It is doubtful that any [[rule variations|house rule]] allows the combination of the two yaku. | |||
Note that not all instances of ryanpeikou could have qualified for chiitoitsu. The following, for instance, is a valid ryanpeikou hand: | |||
:{{#mjt:22334444m78899p}} Agari: {{#mjt:7p}} | |||
===With chinitsu=== | === 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). | Some forms of ryanpeikou mixed with [[chinitsu]] and [[tanyao]] may actually form some [[optional yaku|optional yakuman]], named daisharin (pinzu), daichikurin (souzu), and daisuurin (manzu). | ||
:{{#mjt:2233445566778s}} Agari: {{#mjt:2s}}, {{#mjt:5s}}, or {{#mjt:8s}} | :{{#mjt:2233445566778s}} Agari: {{#mjt:2s}}, {{#mjt:5s}}, or {{#mjt:8s}} | ||
==Value== | ==Value== | ||
[[Image:Coppro ryanpeikou.jpg|250px|thumb|right|Ryanpeikou with real tiles.]] | |||
{{main|Scoring}} | |||
Ryanpeikou can only be scored closed, and is always worth 3 han. So there is no need to be concerned about [[kuisagari|the hand losing value when open]]. The cheapest ryanpeikou hand uses either a [[kanchan]] / [[penchan]] / [[tanki]] [[machi|wait]], or a [[ryanmen]] wait with valued [[honor]] as the pair. In both cases, the hand produces a 3-han and 40-fu value by ron. By tsumo, it is 4-han and 30-fu. | |||
==External links== | ==External links== | ||