hand structure riichi
Tanyao
断么九
(タンヤオ)
Definition
All simples - a 1-han yaku where your entire hand consists only of numbered tiles 2-8. No terminals or honors. Can be open (kuitan) or closed depending on rules.
Related Terms
Simples
中張牌
The numbered tiles 2-8 in each suit. Not terminals or honors. Required for tanyao yaku.
Kuitan
喰い断
Open tanyao - allowing tanyao to be scored with an open hand. The default rule in ari-ari mahjong but forbidden in nashi-nashi.
Yaku
役
Scoring patterns or hands. You must have at least one yaku to win (except with riichi). Each yaku is worth a certain number of han.