Toitoihou
Toitoi 「対々」 is a standard yaku. In English, it is referred as "all triplets"; and it also acquired the nickname of "pon palace". That's due in part with every tile group to be composed of triplets. With this in mind, this hand is immune to any requirement involving the numbered suits or honor tiles. Simply, any group of triplets would suffice. This yaku is not affected by kuisagari, where the hand is devalued in terms of han while open.
| Type | Yaku |
|---|---|
| Kanji | 対々 |
| English | All triplets |
| Value | 2 han |
| Speed | Medium |
| Difficulty | Easy |
Tile pattern
Agari: or
Closed toi toi
Agari: or
If this hand wins by tsumo, then it counts for the suuankou yakuman. Otherwise, it's a toi toi mixed with sanankou.
Formation
As the name implies, this yaku requires koutsu. Usually, this yaku is called open due to the ability for pon to claim discarded tiles from any player.
Compatability
^ 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 | |
| TOI |  |
|
|
 |
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Toitoi with mentsumo and junchan actually form yakuman, as suuankou and chinroutou respectively. Toitoi with chanta forms honroutou.
Viability
External links
- Toitoihou in Japanese Wikipedia