Ryanpeikou: Difference between revisions

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==Tile pattern==
==Tile pattern==
{{#mjt:223344p66778m11z}} Agari: {{#mjt:8m}}
{{#mjt:223344p66778m11s}} Agari: {{#mjt:8m}}


''Note:'' This hand may also win with {{#mjt:5m}}.  However, it'll only count for a [[yasume|lesser value]] of [[pinfu]] and [[iipeikou]].
''Note:'' This hand may also win with {{#mjt:5m}}.  However, it'll only count for a [[yasume|lesser value]] of [[iipeikou]] (and [[pinfu]]).


==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".


== Compatability ==
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 your hand itself is closed.
{{main|Yaku compatability}}
 
== Compatibility ==
{{main|Yaku compatibility}}


{{Yaku compatibility table|RPK}}
{{Yaku compatibility table|RPK}}
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=== Chiitoitsu ===
=== Chiitoitsu ===
This yaku does not 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. The pattern appears as a collection of pairs, when they are actually not.  Because of this interpretation, the two yaku remain distinct and incompatible; and it is doubtful, that any [[rule variations|house rule]] allows the combination of the two 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 look like chiitoitsu. The following, for instance, is a valid ryanpeikou hand:
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}}
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]], [[penchan]] or [[tanki]] [[machi|wait]]. In both cases, the hand produces a 3-han and 40-fu value by ron.  By tsumo, it is 4-han and 30-fu.  Every ryanpeikou hand using [[ryanmen]] is mixed with at least [[pinfu]].
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==
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