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Chankan: Difference between revisions
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=== Ippatsu === | === Ippatsu === | ||
The [[ippatsu]] yaku is normally interrupted by a kan call. To call chankan, the opposing player had already called for kan. However, ippatsu is still not interrupted because the whole kan process has not been completed. The entire kan process includes the kan call itself, plus the rinshan draw and the discard afterwards. The chankan win occurs in the middle of that process. So, it is allowable to score both ippatsu and chankan at the same time. | The [[ippatsu]] yaku is normally interrupted by a kan call. To call chankan, the opposing player had already called for kan. However, ippatsu is still not interrupted because the whole kan process has not been completed. The entire kan process includes the kan call itself, plus the rinshan draw and the discard afterwards. The chankan win occurs in the middle of that process. So, it is allowable to score both ippatsu and chankan at the same time. | ||
== Special cases == | |||
[[Image:Kokushi Denied.png|thumb|right|250px|Case where a [[kan|closed kan]] was declared during a [http://tenhou.net/0/?log=2013121107gm-0019-0000-b01e54cd&tw=1&ts=7 kokushi tenpai].]] | |||
=== Rinshan kaihou === | === Rinshan kaihou === | ||
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=== Kokushi musou === | === Kokushi musou === | ||
If the rules allow, a special case for [[kokushi musou]] exists. This involves a kokushi tenpai hand, where the final tile may be completed with an opponent calling [[kan]] with a closed kan using all four of that particular winning tile. Thus, ron may be declared in that instance, involing the special chankan rule. This is the only case where a tile may be taken from an closed kan. However, this particular rule may be [[Yaku_variations#Kokushi_and_chankan|subject to variation]], which may or may not allow the play to occur. | If the rules allow, a special case for [[kokushi musou]] exists. This involves a kokushi tenpai hand, where the final tile may be completed with an opponent calling [[kan]] with a closed kan using all four of that particular winning tile. Thus, ron may be declared in that instance, involing the special chankan rule. This is the only case where a tile may be taken from an closed kan. However, this particular rule may be [[Yaku_variations#Kokushi_and_chankan|subject to variation]], which may or may not allow the play to occur. | ||