hand structure riichi

Sanshoku Doukou

三色同刻

(さんしょくどうこう)

Definition

Three colored triplets - a 2-han yaku where you have the same numbered triplet in all three suits (e.g., 555m, 555p, 555s).

刻子

Three identical tiles. Can be concealed (ankou) or open (minkou). Also called koutsu.

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.