Sanshoku doujun: Difference between revisions

'''Sanshoku doujun''' {{kana|三色同順}}, sometimes called '''sanshiki''' {{kana|さんしき}} in older media, is a [[yaku]] scored when a hand has three [[sequence]]s, sharing identical numbers, of all three suits. The shorthand '''sanshoku''' more commonly refers to this yaku, instead of the significantly more difficult [[sanshoku doukou]].

This hand contains shuntsu of 123 from 3 different [[Japanese mahjong#Mahjong tiles|main suits]]. Since this hand played closed, it's sanshoku valued 2 han.

While having same tiles with the first example, these hands played open and hence the sanshoku only valued 1 han.

Sanshoku requires three sequence groups, and thus is incompatible with [[toitoi]], [[sanshoku doukou]], [[sanankou]], [[sankantsu]], [[shousangen]], [[honroutou]], and [[chiitoitsu]]. It is incompatible with [[honroutou]] because honroutou requires either toitoi or chiitoi. Since it requires three suits, it is also incompatible with [[honitsu]] and [[chinitsu]]. Finally, while [[ryanpeikou]] and [[ittsu]] do each require sequences, their constraints on the sequences are incompatible with those for sanshoku.

Sanshoku is particularly affected by [[takame and yasume]]. At times, the tile wait involves a ryanmen looking for two tile types for the third tile grouping needed for this yaku.  In this case, one may result in sanshoku, while the other does not; and the difference here may involve 1 or 2 han.

It is possible for both yaku to have potential development in one hand. However, there is no room in the hand for both yaku to exist. So, when both yaku are apparent, then a point may come during the hand to make a choice between each of the two yaku.

This yaku is subject to [[kuisagari]].  When closed, the yaku is worth 2 hand, but it reduces by 1 han when open.