hand structure riichi

Chinitsu

清一色

(チンイツ)

Definition

Pure flush - a yaku worth 6 han (closed) or 5 han (open) where your entire hand consists of only one suit. No honor tiles allowed.

混一色

Half flush - a yaku worth 3 han (closed) or 2 han (open) where your hand contains only one suit plus honor tiles. A common intermediate-level 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.