World Riichi Championship rules

World Riichi Championship rules ruleset
Kuitan, atozuke	Ari-Ari
Starting points	30,000
Ending points (Target)	30,000
Negative score	Game end
Oka (total ante)	0
Uma (placement bonus)	+15/+5 Modified for ties
Renchan setting	Tenpai-renchan
Abortive draws	None

The World Riichi Rules consist of combined 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.

Summary

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
• Japan Professional Mahjong League (JPML)
• Korean Mahjong League (KML)
• Mu Mahjong μ!
• Nihon Pro Mahjong (NPM)
• Real Mahjong Unit (RMU)
• Saikouisen
• United States Professional Mahjong League (USPML)

Kazoe yakuman

Main article: Kazoe yakuman

Normally, a hand worth 13 han or more is classed as a yakuman. However, this value is reduced to sanbaiman.

Kuitan

Main article: Kuitan

Initially, the rule for kuitan, or open tanyao, was prohibited. However, after some discussion, the rules chose to allow kuitan instead.

Tochuu ryuukoku

Main article: Tochuu ryuukoku

Abortive draws are completely omitted from the tournament.

Uma

Main article: Uma

The uma for the tournament uses 「+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 articles: Yakuman and 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.

External links

• WRC rules document