Rule variations: Difference between revisions

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==Overview==
==Overview==
The general rules of the game are complex enough.  However, they are made even more complex, as various rules of the game can be toggled to different settings or simply by "on" or "off" (ari or nashi respectively).


==Agari==
==Agari==
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{{main|Agariyame}}
{{main|Agariyame}}


Allow the dealer to end the hanchan prematurely, while in possession of the lead in the round [[Oorasu|South 4]] or in the [[West round]] after one had has been played.
Allow the dealer to end the hanchan prematurely, while in possession of the lead in the round [[Oorasu|South 4]] or in the [[West round]] after one hand has been played.


* Lead – Allow the dealer to end the hanchan prematurely, with the last dealer is in the lead.
* Lead – Allow the dealer to end the hanchan prematurely, with the last dealer is in the lead.
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{{main|Atozuke}}
{{main|Atozuke}}


Allow the hand to win even if there exists no yaku that is satisfied with all wait tiles. Atozuke nashi, also called sakizuke ari, requires all winning possibilities to satisfy at least one same yaku. Sakizuke requires some
Atozuke handles the rule for yakuless hands to gain yaku on discards.  This is most common on hands waiting on more than two tiles, where one discarded tile produces yakuhai. 
 
* Ari – Allow the hand to gain yaku on the winning tile.
* Nashi – Yaku must be embedded in the hand before the winning tile.
* ? - A hand must have a yaku confirmed by the time the first call completes (exception: "whole hand yaku", e.g. [[honitsu]], can be incomplete on first call).


* Ari – Atozuke: Allow determination of yaku after determining the winning tile.
* Nashi – Sakizuke: Require a fixed yaku no matter how the hand wins.
===Double ron===
===Double ron===
Score two winning declarations at the same time.
Score two winning declarations at the same time.
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Score three winning declarations at the same time.
Score three winning declarations at the same time.


* Ari – Discarder of the winning tile must pay all three hands separately. See double ron ari for distribution of riichi sticks.
* Ari – The discarder of the winning tile must pay all three hands separately. See double ron ari for distribution of riichi sticks.
* Atama – [[Atamahane]], or head bump. Only the first win to the discarder's right is recognized.
* Atama – [[Atamahane]], or head bump. Only the first win to the discarder's right is recognized.
* Abort – Do not score any hand, instead abort the hand with an [[abortive draw]].
* Abort – No hands are scored, and instead, the hand is [[abortive draw|aborted]].


==Chombo==
==Chombo==
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* Ari – Allowed
* Ari – Allowed
* Nashi – Not allowed
* Nashi – Not allowed
* Option – Tenhou.net offers both rules in different settings.  One of the game rooms is set for both kuitan nashi snd akadora nashi. However, there is no setting for one or the other exclusively.  The Korean rules write "concealed hand only selective", which sounds as if kuitan were an optional rule.
* Option – Tenhou.net offers both rules in different settings.  One of the game rooms is set for both kuitan nashi and akadora nashi. However, there is no setting for one or the other exclusively.  The Korean rules write "concealed hand only selective", which sounds as if kuitan were an optional rule.


==Naki==
==Naki==
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