glossary
What is a yaku in mahjong?
A Japanese mahjong pattern that makes a hand eligible to win. Riichi itself is a yaku. A 4-meld-and-a-pair shape without yaku cannot ron or tsumo under riichi rules.
In Tilehaus
A Japanese mahjong pattern that makes a hand eligible to win. Riichi itself is a yaku. A 4-meld-and-a-pair shape without yaku cannot ron or tsumo under riichi rules.