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Chankan: Difference between revisions
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* The opponent must draw the 4th copy of the ponned tile, then declare a shouminkan (added kan) with it. | * The opponent must draw the 4th copy of the ponned tile, then declare a shouminkan (added kan) with it. | ||
Only shouminkans are vulnerable to chankan (again with one exception) | Only shouminkans are vulnerable to chankan (again with one exception): | ||
*[[Ankan]] (closed kan) cannot be ronned | *[[Ankan]] (closed kan) cannot be ronned. The exception is if a hand is in tenpai for [[kokushi]]. A kokushi hand may call ron on an ankan. Not all rulesets enable this "kokushi chankan on a closed kan" rule, though. | ||
*It is impossible to ron off an [[Kan#Daiminkan|daiminkan]] (open kan). When a tile is discarded, it can either be used for ron, or it can be used to complete the kan. Ron takes precedence over kan, so the player wins before the kan is made. If the ron call is skipped, you cannot retroactively ron after the kan is made. | *It is impossible to ron off an [[Kan#Daiminkan|daiminkan]] (open kan). When a tile is discarded, it can either be used for ron, or it can be used to complete the kan. Ron takes precedence over kan, so the player wins before the kan is made. If the ron call is skipped, you cannot retroactively ron after the kan is made. | ||
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===Machi=== | ===Machi=== | ||
{{main|Machi}} | {{main|Machi}} | ||
As mentioned above, in order to obtain chankan, it is impossible to have a copy of the given winning tile in your hand. Therefore, | As mentioned above, in order to obtain chankan, it is impossible to have a copy of the given winning tile in your hand. Therefore, [[wait]]s involving [[shanpon]] or [[tanki]] are impossible. If you hold a tile in your hand, the opponent cannot make an added kan, making it impossible to chankan with that tile. Therefore, only three of the basic waits are possible: [[penchan]], [[kanchan]], and [[ryanmen]]. These are all waits to complete a [[sequence]]. | ||
In the case for [[kokushi musou]], the hand will be tenpai for kokushi with one of the 13 tile types already paired, and it is waiting for the last tile type for completion. Depending on the ruleset, kokushi may or may not be allowed to win from a closed kan. | |||
In the case for [[kokushi musou]], the hand | |||
===Furiten=== | ===Furiten=== | ||