View source for Chuuren poutou

{{Infobox yaku
|type        = Yakuman
|kanji       = 九連宝燈<br>純正九蓮宝燈
|english     = Nine gates<br>Pure nine gates
|value       = Yakuman (closed only)
|yakuSpeed   = Very slow
|difficulty  = Very hard
|yakuCombine = * [[Tenhou]]
* [[Chihou]]
|gameExample = * [http://tenhou.net/0/?log=2014020612gm-0029-0000-d32403e3&tw=0&ts=9 Chuuren]
* [http://tenhou.net/0/?log=2015082519gm-0009-0000-fde1c6c5&tw=2&ts=1 Junsei chuuren]
* [http://tenhou.net/0/?log=2013091303gm-0009-7447-40db80b7&tw=3&ts=3 Junsei chuuren]
* [http://tenhou.net/0/?log=2013102709gm-0009-7447-dce693b1&tw=0&ts=11 Missed chuuren]
}}
'''Chuuren poutou''' {{kana|九連宝燈}} is a [[List of yaku#Yakuman|yakuman]] and a specific instance of [[chinitsu]]. It contains the 13-tile pattern 1-1-1-2-3-4-5-6-7-8-9-9-9 of the same suit,  plus any one more tile from the suit.  A special pattern of chuuren poutou [[Tenpai|tenpai]] produces one with a unique 9-sided wait.  In this case, the winning hand is then called '''junsei chuuren poutou''' {{kana|純正九蓮宝燈}}, or pure chuuren poutou.  The 13-tile pattern generates a 9-sided wait even as a normal hand with four sets and a pair. Chuuren poutou is therefore no hand shape exception, unlike [[Chiitoitsu|chiitoitsu]] and [[Kokushi musou|kokushi musou]].

==Tile pattern==

===Regular===
{{machi
|pattern   = 1112345578999p
|tilewaits = 6p
|yasume    = 59p
}}

If this hand wins with either of the yasume tiles, the hand will score only [[Chinitsu|chinitsu]] rather than the yakuman.

===Nine tile wait===
{{machi
|pattern   = 1112345678999p
|tilewaits = 123456789p
}}

[[File:Nine-Gates-anim.gif]]

<!--http://en.wikipedia.org/wiki/File:Nine-Gates-anim.gif-->

==Value==

Chuuren is a yakuman hand.  However, while tenpai, some tile waits may actually award the hand for a considerably less value of haneman, as a closed chinitsu.  Some rules award a [[double yakuman]] instead when the hand goes out from the 9-sided wait.

==Development==
{{main|List of chuuren configurations}}
The key to this yakuman is the possession of ankou of both 1's and 9's of one suit.  If two of either group of tiles are not available, then any attempt at this yakuman is no longer possible.  Of course, that is in addition to the collection of a string consisting of 2-8 tiles of the same suit.  Since this hand uses a single suit, it overlaps [[chinitsu]] during development.  In fact, many tenpai formations may result in chinitsu, rather than the yakuman.  This is due to the ability of chinitsu to form some [[Machi|complicated waits]].

==External links==
{{jpwiki|九連宝燈}}
* [https://www.youtube.com/watch?v=-7su2I_D0y4 Chuuren] (YouTube)
: Kojima Takeo

[[Category:Yaku]]

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