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Kan: Difference between revisions
→Kan during riichi: further explain the rule by saying "the kan must include a just-drawn tile"
(Added "closed kan on riichi" rule clarification and example 5.) |
(→Kan during riichi: further explain the rule by saying "the kan must include a just-drawn tile") |
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A player may be allowed to call a closed kan during riichi, depending on the hand's composition. This is subject to [[rule variation]]: | A player may be allowed to call a closed kan during riichi, depending on the hand's composition. This is subject to [[rule variation]]: | ||
* Under most professional rulesets, a player is not allowed to call kan if it would change any possible interpretation of the hand. If, for any winning tile, any of the three identical tiles can be interpreted as part of a [[ | * Under most professional rulesets, a player is not allowed to call kan if it would change any possible interpretation of the hand. If, for any winning tile, any of the three identical tiles can be interpreted as part of a [[sequence]] or part of the pair, the kan is not allowed. By proxy, the hands winning tiles cannot change. | ||
* Under some rulesets, such as in [[tenhou.net]] and [[Mahjong Soul]], an alternative is used: | * Under some rulesets, such as in [[tenhou.net]] and [[Mahjong Soul]], an alternative is used: if a kan does not change the hand's possible winning tiles, the kan is allowed. (I.e., changing the hand interpretation is allowed, so long as the waits remain the same.) | ||
** In addition, a newly-drawn tile must be included in the kan; you are not allowed to kan if you had all 4 tiles in hand at riichi declaration (see Example 5). | |||
If a player does declare a kan illegally during riichi, and they call [[ron]] or the game goes to an [[ryuukyoku|exhaustive draw]], then they will be penalized with a [[chombo]] penalty for breaking the rule. If a player is not required to reveal their hand, or if another player wins, they will normally not be penalized. | If a player does declare a kan illegally during riichi, and they call [[ron]] or the game goes to an [[ryuukyoku|exhaustive draw]], then they will be penalized with a [[chombo]] penalty for breaking the rule. If a player is not required to reveal their hand, or if another player wins, they will normally not be penalized. | ||
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:{{#mjt:123555567p3488s}} Illegal kan: {{#mjt:5p}} | :{{#mjt:123555567p3488s}} Illegal kan: {{#mjt:5p}} | ||
Here kan {{#mjt:0z55p0z}} when you draw {{#mjt:8p}} doesn't change waits and preserves | |||
Here, a kan {{#mjt:0z55p0z}} when you draw {{#mjt:8p}} doesn't change waits and preserves tenpai. However it is prohibited even in [[tenhou.net]]/[[Mahjong Soul]] rulesets. | |||
===Last tile=== | ===Last tile=== | ||