Chiniisou: Difference between revisions

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* [http://tenhou.net/0/?log=2013080614gm-0089-0000-x339040987b74&tw=1&ts=7 With] [[junchan]].
* [http://tenhou.net/0/?log=2013080614gm-0089-0000-x339040987b74&tw=1&ts=7 With] [[junchan]].
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'''Chiniisou''' {{kana|清一色}}, often called '''chinitsu''' {{kana|清一}}, is a [[yaku]] scored when the hand only has tiles of one numbered suit. It is worth 6 han, but reduced to 5 if opened. It is sometimes called '''chinichi'''.  
'''Chiniisou''' {{kana|清一色}}, often called '''chinitsu''' {{kana|清一}}, is a [[yaku]] scored when the hand only has tiles of a single numbered suit. It is worth 6 han, but reduced to 5 if opened. It is sometimes called '''chinichi'''.  


==Tile patterns==
==Tile patterns==
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==Formation==
==Formation==
As defined, this yaku is formed by collecting tiles of one suit.  Therefore, tiles not of a particular suit are regularly discarded. As a consequence, a player aiming for a chinitsu may be very easily detected via discards alone.
Since only one suit can be used for this yaku, tiles of the two other suits will be discarded. As a consequence, a player aiming for a honitsu/chinitsu will often discard tiles of two suits. This is especially true when middle tiles and/or [[dora]] are discarded early on.


===Complex wait patterns===
===Complex wait patterns===
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.
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.


== Compatibility ==
== Compatibility ==
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== Value ==
== Value ==
As a standalone yaku, chinitsu is at least a [[mangan]], even when open. To regain the lost han as an open hand, it simply takes a [[dora]], or another yaku, to bring the hand up to its closed value of a haneman.
As a standalone yaku, chinitsu is at least a [[mangan]] open and a [[haneman]] closed. An open chinitsu can easily become a haneman with a [[dora]] or another yaku.


===Yakuman===
===Yakuman===
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]].
Due to the relatively high value of this yaku, chinitsu may be involved in the formation of [[kazoe yakuman]], especially closed. A closed chinitsu, worth 6 han, is almost half the requirement of 13 han; other yaku and/or dora will need to provide the rest. A certain pattern of chinitsu hand can become a regular yakuman, [[chuuren poutou]].


==External links==
==External links==

Latest revision as of 13:42, 12 August 2024

Chiniisou
Type Yaku
Kanji 清一色
English Flush
Value 6 han (closed)
5 han (open)
Speed Slow
Difficulty Medium

Chiniisou 「清一色」, often called chinitsu 「清一」, is a yaku scored when the hand only has tiles of a single numbered suit. It is worth 6 han, but reduced to 5 if opened. It is sometimes called chinichi.

Tile patterns

Chinitsu scored at a Chicago Area Mahjong session.

Using pinzu:

Waiting for:

Using manzu:

Waiting for:

Using souzu:

Waiting for:

Formation

Since only one suit can be used for this yaku, tiles of the two other suits will be discarded. As a consequence, a player aiming for a honitsu/chinitsu will often discard tiles of two suits. This is especially true when middle tiles and/or dora are discarded early on.

Complex wait patterns

Chinitsu is notorious for developing complex wait patterns. Since all 13 tiles are of one suit, it is easy for groups to mix together, forming multi-sided waits.

Compatibility

^ Ippatsu requires riichi to be of any use.

RCH DRI IPP SMO TAN PFU IPK ITT YAK SDJ SDO TOI SNA SNK CHA JUN RPK SSG HRO HON CHN CHI RIN HAI HOU CHK
CHN

Chinitsu requires a single suit with no honors. Yakuhai, shousangen, sanshoku, and sanshoku doukou 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.

Value

As a standalone yaku, chinitsu is at least a mangan open and a haneman closed. An open chinitsu can easily become a haneman with a dora or another yaku.

Yakuman

Due to the relatively high value of this yaku, chinitsu may be involved in the formation of kazoe yakuman, especially closed. A closed chinitsu, worth 6 han, is almost half the requirement of 13 han; other yaku and/or dora will need to provide the rest. A certain pattern of chinitsu hand can become a regular yakuman, chuuren poutou.

External links

Chiniisou in Japanese Wikipedia
Game designed with sou tiles only to train reading chinitsu hands.