Yaku compatibility: Difference between revisions

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This is a table depicting the compatibilities of the different [[yaku]] with each other. While yaku may be combined in one hand, some yaku simply cannot combine with each other due to tile counts and patterns. In other cases, they simply cannot combine by rule.
[[Image:Junchan sanshoku baiman.jpg|thumb|right|250px|A single hand composed of six yaku to produce a baiman hand.]]
 
This is a table showing the compatibilities of the different [[yaku]] with each other. While yaku may be combined in one hand, it is simply impossible to combine certain yaku with each other.
 
==Overview==
Yaku may not combine for two major reasons:
 
# Conflicting definitions. [[Tanyao]] requires the hand contains no honor tiles, but [[yakuhai]] requires a triplet of honor tiles, so the two cannot be combined.
# When a yaku always implies another yaku, they cannot score together. For instance, a [[junchan]] hand has a terminal in every group. [[Chanta]] requires that the hand has a terminal or honor in every group. Because every junchan hand would also qualify for chanta, chanta is not scored.
:There are two partial exceptions to this rule:
:*[[Shousangen]] always implies two dragon yakuhai, but does not guarantee you have any one of "haku", "hatsu", or "chun".
:*[[Ippatsu]] must be scored with a hand that declares [[riichi]]. However, "riichi" and "[[double riichi]]" are considered as 2 distinct yaku. Therefore, an ippatsu hand does not guarantee "riichi", since it could also be "double riichi".
 
When two yaku imply each other, as with reason #2, there are two alternate ways to define it in the rules:
*"Alter the yaku definitions so that they can never be scored together". In these rules, chanta is scored when there are honors/terminals in each group, and in addition, the hand ''must'' contain at least one honor tile.
*"Yaku that imply each other cannot be scored". In these rules, chanta is scored when there are honor/terminals in each group (not requiring an honor tile). However, chanta and junchan are never scored together. Junchan is worth more, so it supersedes chanta.
 
Both definitions are equivalent for any practical case. Most of these combinations, with the exception of toitoi + mentsumo, are based on the assumption that the yaku are defined using the second method.
 
===Indirectly illegal===
There are a few combinations that are indirectly impossible due to the implication rule.
 
Four combinations actually form yakuman:
 
* Toitoi + Junchan = Chinroutou
* Toitoi + Mentsumo = Suuankou
* Honroutou + Junchan = Chinroutou
* Double riichi + Chankan is only possible with a Kokushi musou hand
 
Some combinations form a different yaku which implies one component of the combination, and as a result can never be counted:
 
* Toitoi + Chanta = Toitoi + Honroutou
* Chiitoitsu + Chanta = Chiitoitsu + Honroutou
* Honitsu + Tanyao = Chinitsu + Tanyao
* Honitsu + Junchan = Chinitsu + Junchan
* Chinitsu + Chanta = Chinitsu + Junchan
 
These combinations are marked with {{or}} in the table below.


== Yaku ==
== Yaku ==
{| class="wikitable" width=20%
{| class="wikitable" width=25%
! colspan=2 | Key
! colspan=2 | Key
|-
|-
! Abbrevation !! Yaku
!width=10%| Abbrevation !!width=90%| Yaku
|-
|-
| RCH || [[Riichi]]
| RCH || [[Riichi]]
Line 31: Line 68:
| TOI || [[Toitoi]]
| TOI || [[Toitoi]]
|-
|-
| SNA || [[San ankou]]
| SNA || [[Sanankou]]
|-
|-
| SNK || [[San kantsu]]
| SNK || [[Sankantsu]]
|-
|-
| CHA || [[Chanta]]
| CHA || [[Chanta]]
Line 60: Line 97:
|}
|}


Two combinations actually form yakuman:
[[Nagashi mangan]] is excluded, because it is incompatible with anything, even riichi.
 
* Toitoi + Junchan = Chinroutou
* Toitoi + Mentsumo = Suuankou


=== Compatibility ===
=== Compatibility ===


{| class="wikitable" width=100%
{{Yaku compatibility table}}
|-
| || width=4% | RCH || width=4% | DRI || width=4% | IPP || width=4% | SMO || width=4% | TAN || width=4% | PFU || width=4% | IPK || width=4% | ITT || width=4% | YAK || width=4% | SDJ || width=4% | SDO || width=4% | TOI || width=4% | SNA || width=4% | SNK || width=4% | CHA || width=4% | JUN || width=4% | RPK || width=4% | SSG || width=4% | HRO || width=4% | HON || width=4% | CHN || width=4% | CHI || width=4% | RIN || width=4% | HAI || width=4% | HOU || width=4% | CHK
|-
| RCH ||bgcolor="000000"| ||bgcolor="000000"|  || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}}
|-
| DRI ||bgcolor="000000"| ||bgcolor="000000"|  || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}}
|-
| IPP || {{yes}} || {{yes}} ||bgcolor="000000"|  || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{no}} || {{yes}} 
|-
| SMO || {{yes}} || {{yes}} || {{yes}} ||bgcolor="000000"|  || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{or}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}}
|-
| TAN || {{yes}} || {{yes}} || {{yes}} || {{yes}} ||bgcolor="000000"|  || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} 
|-
| PFU || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} ||bgcolor="000000"|  || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} 
|-
| IPK || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} ||bgcolor="000000"|  || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} 
|-
| ITT || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} ||bgcolor="000000"|  || {{yes}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}}
|-
| YAK || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}}
|-
| SDJ || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} ||bgcolor="000000"|  || {{no}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}}
|-
| SDO || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{no}} ||bgcolor="000000"|  || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}}
|-
| TOI || {{yes}} || {{yes}} || {{yes}} || {{or}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{no}} || {{yes}} ||bgcolor="000000"|  || {{yes}} || {{yes}} || {{no}} || {{or}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{no}}
|-
| SNA || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{no}} || {{yes}} || {{yes}} ||bgcolor="000000"|  || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}}
|-
| SNK || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} ||bgcolor="000000"|  || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}}
|-
| CHA || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} ||bgcolor="000000"| || {{no}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}}
|-
| JUN || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{or}} || {{no}} || {{yes}} || {{no}} ||bgcolor="000000"|  || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}}
|-
| RPK || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} ||bgcolor="000000"| || {{no}} || {{no}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}}
|-
| SSG || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{no}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} ||bgcolor="000000"|  || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}}
|-
| HRO || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} ||bgcolor="000000"|  || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}}
|-
| HON || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} ||bgcolor="000000"|  || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}}
|-
| CHN || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{no}} ||bgcolor="000000"|  || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}}
|-
| CHI || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} ||bgcolor="000000"|  || {{no}} || {{yes}} || {{yes}} || {{no}}
|-
| RIN || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} ||bgcolor="000000"|  || {{no}} || {{no}} || {{no}}
|-
| HAI || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} ||bgcolor="000000"|  || {{no}} || {{no}} 
|-
| HOU || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} ||bgcolor="000000"|  || {{no}}
|-
| CHK || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{no}} || bgcolor="000000"|
|}


== Yakuman ==
== Yakuman ==
{| class="wikitable"
{{main|Multiple yakuman}}
! colspan=2 | Key
 
|-
Yakuman may not combine with regular yaku. However, in certain rulesets, different yakuman can combine with each other. As a result, hands can score multiple yakuman.
! Abbrevation !! Yakuman
 
|-
The maximum number of distinct yakuman a hand can have is four: [[suuankou]], [[tsuuiisou]], [[daisuushii]], and one of [[tenhou]]/[[chiihou]]/[[suukantsu]]. In rulesets where suuankou tanki and daiisuushi are scored as double, the hand ends up with a sextuple (x6) yakuman.
| KMU || Kokushi musou
|-
| DSG || Daisangen
|-
| SUA || Suuankou
|-
| SSS || Shousuushi
|-
| DSS || Daisuushi
|-
| TSU || Tsuuiisou
|-
| RYU || Ryuuiisou
|-
| CHR || Chinroutou
|-
| CHU || Chuuren poutou
|-
| SUK || Suukantsu
|-
| TEN || Tenhou
|-
| CHH || Chiihou
|}


=== Compatibility ===
{| class="wikitable"
{| class="wikitable"
| || KMU || DSG || SUA || SSS || DSS || TSU || RYU || CHR || CHU || SUK || TEN || CHH
|colspan=2| || KMU || DSG || SUA || SSS || DSS || TSU || RYU || CHR || CHU || SUK || TEN || CHH
|-
|-
| KMU ||bgcolor="000000"|  || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}}
| [[Kokushi musou]] ||  KMU ||bgcolor="000000"|  || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}}
|-
|-
| DSG || {{no}} ||bgcolor="000000"| || {{yes}} || {{no}} || {{no}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}}  
| [[Daisangen]] ||  DSG || {{no}} ||bgcolor="000000"| || {{yes}} || {{no}} || {{no}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}}  
|-
|-
| SUA || {{no}} || {{yes}} ||bgcolor="000000"| || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}}
| [[Suuankou]] ||  SUA || {{no}} || {{yes}} ||bgcolor="000000"| || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{yes}} || {{yes}}
|-
|-
| SSS || {{no}} || {{no}} || {{yes}} ||bgcolor="000000"| ||bgcolor="000000"| || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}}
| [[Shousuushii]] ||  SSS || {{no}} || {{no}} || {{yes}} ||bgcolor="000000"| ||bgcolor="000000"| || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}}
|-
|-
| DSS || {{no}} || {{no}} || {{yes}} ||bgcolor="000000"| ||bgcolor="000000"| || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}}
| [[Daisuushii]] ||  DSS || {{no}} || {{no}} || {{yes}} ||bgcolor="000000"| ||bgcolor="000000"| || {{yes}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}}
|-
|-
| TSU || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} ||bgcolor="000000"| || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}}
| [[Tsuuiisou]] ||  TSU || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} ||bgcolor="000000"| || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}}
|-
|-
| RYU || {{no}} || {{no}} || {{yes}} || {{no}} || {{no}} || {{no}} ||bgcolor="000000"| || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}}
| [[Ryuuiisou]] ||  RYU || {{no}} || {{no}} || {{yes}} || {{no}} || {{no}} || {{no}} ||bgcolor="000000"| || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}}
|-
|-
| CHR || {{no}} || {{no}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{no}} ||bgcolor="000000"| || {{no}} || {{yes}} || {{yes}} || {{yes}}  
| [[Chinroutou]] ||  CHR || {{no}} || {{no}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{no}} ||bgcolor="000000"| || {{no}} || {{yes}} || {{yes}} || {{yes}}  
|-
|-
| CHU || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} ||bgcolor="000000"| || {{no}} || {{yes}} || {{yes}}  
| [[Chuuren poutou]] ||  CHU || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} || {{no}} ||bgcolor="000000"| || {{no}} || {{yes}} || {{yes}}  
|-
|-
| SUK || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} ||bgcolor="000000"| || {{no}} || {{no}}
| [[Suukantsu]] ||  SUK || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} ||bgcolor="000000"| || {{no}} || {{no}}
|-
|-
| TEN || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} ||bgcolor="000000"| ||bgcolor="000000"|  
| [[Tenhou and chiihou|Tenhou]] ||  TEN || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} ||bgcolor="000000"| ||bgcolor="000000"|  
|-
|-
| CHH || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} ||bgcolor="000000"| ||bgcolor="000000"|  
| [[Tenhou and chiihou|Chiihou]] ||  CHH || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{no}} ||bgcolor="000000"| ||bgcolor="000000"|  
|}
|}
== Compatibility ==


== External links ==
== External links ==
[[Category:Yaku]]
[[Category:Yaku]]
[[Category:Strategy]]


{{Navbox yaku}}
{{Navbox yaku}}
{{Navbox strategy}}

Latest revision as of 04:03, 24 April 2024

A single hand composed of six yaku to produce a baiman hand.

This is a table showing the compatibilities of the different yaku with each other. While yaku may be combined in one hand, it is simply impossible to combine certain yaku with each other.

Overview

Yaku may not combine for two major reasons:

  1. Conflicting definitions. Tanyao requires the hand contains no honor tiles, but yakuhai requires a triplet of honor tiles, so the two cannot be combined.
  2. When a yaku always implies another yaku, they cannot score together. For instance, a junchan hand has a terminal in every group. Chanta requires that the hand has a terminal or honor in every group. Because every junchan hand would also qualify for chanta, chanta is not scored.
There are two partial exceptions to this rule:
  • Shousangen always implies two dragon yakuhai, but does not guarantee you have any one of "haku", "hatsu", or "chun".
  • Ippatsu must be scored with a hand that declares riichi. However, "riichi" and "double riichi" are considered as 2 distinct yaku. Therefore, an ippatsu hand does not guarantee "riichi", since it could also be "double riichi".

When two yaku imply each other, as with reason #2, there are two alternate ways to define it in the rules:

  • "Alter the yaku definitions so that they can never be scored together". In these rules, chanta is scored when there are honors/terminals in each group, and in addition, the hand must contain at least one honor tile.
  • "Yaku that imply each other cannot be scored". In these rules, chanta is scored when there are honor/terminals in each group (not requiring an honor tile). However, chanta and junchan are never scored together. Junchan is worth more, so it supersedes chanta.

Both definitions are equivalent for any practical case. Most of these combinations, with the exception of toitoi + mentsumo, are based on the assumption that the yaku are defined using the second method.

Indirectly illegal

There are a few combinations that are indirectly impossible due to the implication rule.

Four combinations actually form yakuman:

  • Toitoi + Junchan = Chinroutou
  • Toitoi + Mentsumo = Suuankou
  • Honroutou + Junchan = Chinroutou
  • Double riichi + Chankan is only possible with a Kokushi musou hand

Some combinations form a different yaku which implies one component of the combination, and as a result can never be counted:

  • Toitoi + Chanta = Toitoi + Honroutou
  • Chiitoitsu + Chanta = Chiitoitsu + Honroutou
  • Honitsu + Tanyao = Chinitsu + Tanyao
  • Honitsu + Junchan = Chinitsu + Junchan
  • Chinitsu + Chanta = Chinitsu + Junchan

These combinations are marked with in the table below.

Yaku

Key
Abbrevation Yaku
RCH Riichi
DRI Double riichi
IPP Ippatsu
SMO Mentsumo
TAN Tanyao
PFU Pinfu
IPK Iipeikou
ITT Ittsu
YAK Yakuhai
SDJ Sanshoku doujun
SDO Sanshoku doukou
TOI Toitoi
SNA Sanankou
SNK Sankantsu
CHA Chanta
JUN Junchan
RPK Ryanpeikou
SSG Shousangen
HRO Honroutou
HON Honitsu
CHN Chinitsu
CHI Chiitoitsu
RIN Rinshan
HAI Haitei
HOU Houtei
CHK Chankan

Nagashi mangan is excluded, because it is incompatible with anything, even riichi.

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
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

Yakuman

Main article: Multiple yakuman

Yakuman may not combine with regular yaku. However, in certain rulesets, different yakuman can combine with each other. As a result, hands can score multiple yakuman.

The maximum number of distinct yakuman a hand can have is four: suuankou, tsuuiisou, daisuushii, and one of tenhou/chiihou/suukantsu. In rulesets where suuankou tanki and daiisuushi are scored as double, the hand ends up with a sextuple (x6) yakuman.

Compatibility

KMU DSG SUA SSS DSS TSU RYU CHR CHU SUK TEN CHH
Kokushi musou KMU
Daisangen DSG
Suuankou SUA
Shousuushii SSS
Daisuushii DSS
Tsuuiisou TSU
Ryuuiisou RYU
Chinroutou CHR
Chuuren poutou CHU
Suukantsu SUK
Tenhou TEN
Chiihou CHH

External links

Closed only Yaku - 1 han
Yaku - 1 han
Yaku - 2 han
Yaku - 3 han
Yaku - 6 han
Yakuman
Special
Optional
Topics
Hand development
Defense
Scoring
Retrieved from "https://riichi.wiki/index.php?title=Yaku_compatibility&oldid=24802"