Chankan: Difference between revisions

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{{main|Machi}}
{{main|Machi}}


As defined, chankan can only be achieved when a [[minkou]] (open triplet) is upgraded to a ''shouminkan''.  In other words, another player had called pon earlier and then drew the 4th tile, to be called kan with.  If a player is tenpai for that tile, then the player may declare ron.
As defined, chankan can only be achieved when a [[minkou]] (open triplet) is upgraded to a ''shouminkan''.  In other words, a player had called pon earlier and then drew the 4th tile, for the kan.  If another player is tenpai for that tile, then the player may declare ron.  To some degree, the added kan may be viewed as a discard in this case.


So, when it comes to [[machi]] (wait patterns), only three basic types can be used for chankan: [[penchan]], [[kanchan]], and [[ryanmen]].  Some patterns that utilize any of these three may also apply.  This is simply due to the number of tiles remaining (just one), for every minkou.  So, tile patterns involving [[shanpon]] and [[tanki]] are impossible for chankan, as they each possess tiles necessary for kan calls.
So, when it comes to [[machi]] (wait patterns), only three basic types can be used for chankan: [[penchan]], [[kanchan]], and [[ryanmen]].  Some patterns that utilize any of these three may also apply.  This is simply due to the number of tiles remaining (just one), for every minkou.  So, tile patterns involving [[shanpon]] and [[tanki]] are impossible for chankan, as they each possess tiles necessary for kan calls.
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