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'''Chankan''' (搶槓) is a standard yaku. It is dependent on the usage of [[kan]], where a player may declare ron while a player calls to upgrade a [[koutsu|minkou]] to a [[Kan#Shominkan|shominkan]]. In other words, if a player is tenpai for a tile used for an "added kan", then the player may declare a win on that tile. | '''Chankan''' (搶槓) is a standard yaku. It is dependent on the usage of [[kan]], where a player may declare ron while a player calls to upgrade a [[koutsu|minkou]] to a [[Kan#Shominkan|shominkan]]. In other words, if a player is tenpai for a tile used for an "added kan", then the player may declare a win on that tile. | ||
In most cases you are not allowed to call ron on an [[Kan#Ankan|ankan]]. The exception to this is when you are in [[kokushi]] [[tenpai]] and another player's ankan is your wait. | In most cases you are not allowed to call ron on an [[Kan#Ankan|ankan]]. The exception to this is when you are in [[kokushi]] [[tenpai]] and another player's ankan is your wait. | ||
==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. | |||
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. | |||
==External links== | ==External links== | ||