Chiniisou: Difference between revisions

'''Chiniisou''' {{kana|清一色}} is a standard [[List of yaku#Six han|yaku]], scored when the hand composed of tiles in one numbered suit only. Chinitsu is worth 6 han, but it decreases to 5 han when opened. This yaku is usually referred to as '''chinitsu''' or, occasionally, '''chinichi'''.

Chinitsu is notorious for developing complex [[Machi#Complex_patterns|wait patterns]]. Since all 13 tiles are of one suit, it is easy for groups to mix together, forming multi-sided waits. If playing without computers, it can be difficult to tell what your waits are.

== Compatibility ==

Chinitsu requires a single suit with no honors. [[Yakuhai]], [[shousangen]], [[sanshoku]], and [[sanshoku douku]] all require honors or multiple suits, and are thus incompatible. Chinitsu implies [[honitsu]], so they are not counted together. If combined with [[chanta]], the hand is actually [[junchan]], so that yaku is counted instead. Finally, chinitsu and [[honroutou]] would require a hand containing at most eight tiles (the 1s and 9s of one suit), which is impossible.

Due to the relatively high value of this yaku, chinitsu may be involved in the formation of [[kazoe yakuman]], especially when closed. The 6-han from closed chinitsu is almost half the requirement for 13-han; naturally, other yaku and/or dora will need to provide the next. Though, one particular pattern may form as a true yakuman, [[chuuren poutou]].