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Chuuren poutou: Difference between revisions
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'''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. In addition, the hand must be closed. Calling a [[kan]] on the 1 or 9 invalidates the yakuman. | |||
A special pattern of chuuren [[tenpai]], '''junsei chuuren poutou''' {{kana|純正九蓮宝燈}} ("pure churren poutou"), results in a 9-sided wait. It occurs when you complete the 1-1-1-2-3-4-5-6-7-8-9-9-9 pattern without any duplicate tiles. Unlike the 13-sided [[kokushi musou]], this 9-sided wait is formed naturally with four sets and a pair. Some [[yaku variations|rule variations]] consider this a [[double yakuman]]. | |||
==Tile pattern== | ==Tile pattern== | ||
[[Image:Chuuren real.jpg|right|thumb|250px|Chuuren poutou winning over [[daisangen]].]] | |||
===Regular=== | ===Regular=== | ||
{{ | {{machi | ||
|pattern = 1112345578999p | |||
|tilewaits = 6p | |||
|yasume = 59p | |||
}} | |||
If this hand wins with either of the yasume tiles, the hand will score only [[chinitsu]] rather than the yakuman. | |||
===Nine tile wait=== | ===Nine tile wait=== | ||
{{ | {{machi | ||
|pattern = 1112345678999p | |||
|tilewaits = 123456789p | |||
}} | |||
[[File: | [[File:9Gates.gif]] <!--http://en.wikipedia.org/wiki/File:9Gates.gif--> | ||
In the above animation, the different winning tiles show the shifting tile group configurations as they count up 1 through 9. The groupings change with each winning tile. Sequential groups are marked in green, while the indicated pairs are marked blue. Then in red, the 1 or 9 indicated as triplets. | |||
==Value== | ==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}} | |||
Since this hand is made up of one suit, it overlaps with [[chinitsu]] during development. In fact, many tenpai formations may result in chinitsu instead of the yakuman. | |||
The key to this yakuman is the possession of ankou of both 1's and 9's of one suit. If two copies of either 1 or 9 are unavailable, then the yakuman becomes impossible. Similarly, if all four of any other numbered tile is unavailable, then it also becomes impossible. Of course, gathering a string of 2-8 is also difficult. | |||
== | ==External links== | ||
* [ | {{jpwiki|九連宝燈}} | ||
* [ | * [https://scirate.com/arxiv/1707.07345 Mathematical study] | ||
* [https://www.youtube.com/watch?v=-7su2I_D0y4 Chuuren] (YouTube) | |||
: Kojima Takeo | |||
[[Category:Yaku]] | [[Category:Yaku]] | ||
{{Navbox yaku}} | |||
{{Navbox machi}} | |||