World Riichi Championship rules: Difference between revisions

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The '''World Riichi Rules''' consist of combined [[Rule variations|rulesets]] applied by the [[EMA]] and contemporary Japanese rules.  The rules document is authored by Sylvain Malbec and is accepted by the EMA, [[JPML]], and the rest of the tournament participants.  The rules were applied to the [[2014 World Riichi Mahjong Competition]].
{{Infobox ruleset
|ariOrNashi        = Ari-Ari
|outPoints          = 30,000
|inPoints          = 30,000
|negaScore          = Game end
|okaPoints          = 0
|umaPoints          = +15/+5<br>Modified for ties
|multiWinCase      =
|callPrecedence    =
|doraSettings      =
|renchanSetting    = Tenpai-renchan
|abortiveSettings  = None
|specificHouseRules =
}}
The '''World Riichi Rules''' consist of combined [[Rule variations|rulesets]] applied by the [[EMA]] and contemporary Japanese rules.  The rules document is authored by Sylvain Malbec and is accepted by the EMA, [[JPML]], and the rest of the tournament participants.  The rules were applied to the [[World Riichi Championship]].


== Notable differences ==
== Summary ==
The rules apply regular [[Japanese mahjong]] rules with some notable differences.
The rules apply regular [[Japanese mahjong]] rules with some notable differences.  The following organizations and their rulesets were put into consideration:
 
* [[European Mahjong Association]] (EMA)
* [[101 Kyougi Renmei]]
* [[Japan Professional Mahjong League]] (JPML)
* [[Korean Mahjong League]] (KML)
* [[Mahjong Union|Mu Mahjong μ!]]
* [[Nihon Pro Mahjong]] (NPM)
* [[Real Mahjong Unit]] (RMU)
* [[Saikouisen]]
* [[United States Professional Mahjong League]] (USPML)
 
=== Basic rules ===
Basic rules to the game are essentially the same.  Game mechanics regarding turn order, [[Naki|tile calls]], and [[List of yaku|yaku]] are inherently the same.  Rule differences are generally applicable using ari (on) or nashi (off) on various rule settings and variations.  Any major differences are listed.
 
== Kuitan ==
{{Main|Kuitan}}
 
Kuitan, or open tanyao, is allowed in the WRC rules.  During the planning stages of the first WRC, there were initial plans to prohibit kuitan at the behest of the EMA. However, after some discussion, the stakeholders chose to allow kuitan instead.
 
== Tochuu ryuukyoku ==
{{main|Tochuu ryuukyoku}}
Abortive draws are completely omitted from the tournament.
 
== Uma ==
{{main|Uma}}
The uma for the tournament uses {{uma|+15|+5|-5|-15}}.  However, in the event of a tie between players, then the uma is adjusted to accommodate the tie.  At the end, the end game score is calculated as follows:
 
Session score = ((points – 30,000) / 1,000) + uma
 
== Yakuman ==
{{main|Yakuman|Multiple yakuman}}
 
Every yakuman is counted as single yakuman.  Plus, the maximum points awarded for any hand is capped as that of a single yakuman.
 
=== Kazoe yakuman ===
{{main|Kazoe yakuman}}
Normally, a hand worth 13 han or more is classed as a [[yakuman]].  However, this value is reduced to [[sanbaiman]].
 
=== Multiple yakuman ===
{{main|Multiple yakuman}}
 
=== Yakuman pao ===
{{main|Pao}}
 
== Chombo ==
{{main|Chombo}}
 
The penalty for chombo was originally set to -20, post-game after factoring uma.  For the [[2022 World Riichi Championship|2022 edition]], the penalty was increased to -30.


== External links ==
== External links ==
* [http://www.wrc2014.com/docs/wrc_rules.pdf WRC rules document]
* [https://worldriichi.org/wrc-rules WRC Rules]
 
* [http://asdfasdf.ethz.ch/~simon/etc/wrc_rules.pdf WRC rules document]
[[Category:Game rules]]
* [http://ooyamaneko.net/download/mahjong/World_Riichi_Championship_Rules_2015.pdf WRC rules 2015 version]
[[Category:Rule sets]]
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