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Ryanpeikou: Difference between revisions
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==Formation== | ==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". | 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. Declaring [[ron]] with closed hand is fine, even if the ron'd tile completed this yaku. | |||
== Compatibility == | == Compatibility == | ||
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=== Chiitoitsu === | === Chiitoitsu === | ||
This yaku | 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 | 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}} | :{{#mjt:22334444m78899p}} Agari: {{#mjt:7p}} | ||
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[[Image:Coppro ryanpeikou.jpg|250px|thumb|right|Ryanpeikou with real tiles.]] | [[Image:Coppro ryanpeikou.jpg|250px|thumb|right|Ryanpeikou with real tiles.]] | ||
{{main|Scoring}} | {{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. | 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== | ||