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* [http://tenhou.net/0/?log=2012112813gm-0009-7447-af4e435f&tw=1&ts=8 Chankan with] [[Ippatsu]] | * [http://tenhou.net/0/?log=2012112813gm-0009-7447-af4e435f&tw=1&ts=8 Chankan with] [[Ippatsu]] | ||
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'''Chankan''' | '''Chankan''' {{kana|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 almost all cases, players are not allowed to call ron on an [[Kan#Ankan|ankan]] (closed kan). The notable exception involves a [[kokushi]] [[tenpai]] hand, where the last tile needed for the yakuman is called for an ankan. However, the kokushi exception varies on the rules. In [[Rule_variations#Kokushi_and_chankan|some rules]], it is disallowed outright. | In almost all cases, players are not allowed to call ron on an [[Kan#Ankan|ankan]] (closed kan). The notable exception involves a [[kokushi]] [[tenpai]] hand, where the last tile needed for the yakuman is called for an ankan. However, the kokushi exception varies on the rules. In [[Rule_variations#Kokushi_and_chankan|some rules]], it is disallowed outright. | ||
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Alternatively, this yaku may be referred to as "robbing a kan". [[Tenpai]] for chankan must involve a hand, in which one of the [[machi|waiting tiles]] has been called as [[naki|pon]] by another player. Any tenpai hand works for chankan, as long as the waiting tile(s) have been called for [[naki|pon]] earlier, and then the player calls for an added kan. Naturally, waits involving [[jihai|honor tiles]] do not work in this situation. | Alternatively, this yaku may be referred to as "robbing a kan". [[Tenpai]] for chankan must involve a hand, in which one of the [[machi|waiting tiles]] has been called as [[naki|pon]] by another player. Any tenpai hand works for chankan, as long as the waiting tile(s) have been called for [[naki|pon]] earlier, and then the player calls for an added kan. Naturally, waits involving [[jihai|honor tiles]] do not work in this situation. | ||
While the call for kan reveals additional [[dora]], in the form of kan-dora, the call for chankan interrupts the process for kan. Therefore, additional dora is not revealed. | |||
===Limitation=== | ===Limitation=== | ||