Yaku variations: Difference between revisions

Different [[yaku]] may be subject to [[rule variations]], such as altering the value or conditions of the yaku. A number of yaku are not included by default.

{{main|Chiitoitsu}}

Under most rulesets, chiitoitsu requires 7 unique pairs.  

Some house rules may allow duplicate pairs (meaning 4-of-a-kind counts as 2 pairs), but this is not seen in standard play.

{{main|Double riichi}}

* Nashi – Always score 1 han per riichi declaration.

Score each of the listed patterns as a double yakuman.

* 9 – Junsei [[chuuren poutou]]: Chuuren with the nine-sided wait (tenpai with 1112345678999) counts as a double yakuman.

Score [[haitei]] and [[houtei]].

* Nashi – Neither yaku is allowed.

[[Haitei]] normally requires a draw from the live wall, while [[kan]] draws from the dead wall. This rule, if ari, negates hatei's live wall requirement, allowing haitei and [[rinshan]] to score together.

* Nashi – Do not allow this combination. This is Japanese default.

Score 1 more han for closed honitsu or chinitsu than open.

* Nashi – Honitsu is always scored 2 han and chinitsu is always scored 5 han, regardless of the hand state.

{{Main|Ippatsu}}

* Nashi – Don't score ippatsu.

{{main|Kazoe yakuman}}

* Nashi – Score as a sanbaiman with 6,000 basic points.

{{main|Kokushi musou|Chankan}}

* Nashi – Disallowed

{{main|Multiple yakuman}}

* Nashi – Yakuman cannot be combined; score only one type of yakuman per hand.

{{main|Optional yaku}}

Many yaku are not included in the [[list of yaku]], as they are not accepted as "standard yaku". House rules may include any amount of desired yaku. The following are particularly common examples; the [[optional yaku]] page contains more detailed rules and many more yaku.

Daisharin is an [[optional yaku]], formed with a hand consisting of 22334455667788, all of the same suit. If disabled, such a hand would be worth at least 10 han.

For souzu and manzu, the hands are labeled as daichikurin and daisuurin, respectively.

Allow players to declare open riichi instead of a normal riichi. Open riichi is worth 2 han instead of the normal 1 han. The declarer must reveal the hand's waits, or the entire hand, at the same time as the declaration.

In a few rulesets, intentionally dealing into an open riichi will raise the hand up to a [[yakuman]] (penalizing the discarder).

Score the eighth consecutive win of the same dealer as a [[Optional yaku|yakuman]].

* Nashi - Eighth hand scored normally.

{{main|Renhou}}

* Nashi – Renhou is not a yaku. The hand is scored normally, there must be at least one other yaku present for a valid win.

{{main|Sekinin barai}}

Pao is a penalty applied to players who allow others to guarantee certain types of yaku/yakuman.

Impose a liability payment on the player who has dealt the third pon/kanned dragon tile, or the fourth pon/kanned wind tile, if the caller wins with [[daisangen]] (big three dragons) or [[daisuushii]] (big four winds) later.

* Nashi – No liability for daisangen or daisuushii.

Impose a liability payment on the player who has dealt the fourth kanned tile, if the caller wins with [[suukantsu]] (four [[kantsu]]) later.

* Nashi – No liability for suukantsu.

Require that a player pay for a hand, as for a ron, when his or her discard is called for [[daiminkan]] and the caller wins a tsumo for [[rinshan kaihou]] on the replacement tile.

* Nashi – All players pay for the hand, as normal for a tsumo.

{{main|Pinfu}}

* Nashi - Pinfu cannot be scored if the hand wins by tsumo. An otherwise pinfu hand won with tsumo scores 1 han 30 fu.

{{main|Nagashi mangan}}

* Nashi – Don't allow nagashi mangan.

{{main|Rinshan kaihou}}

* Nashi – Don't count any fu for tsumo on the rinshanpai.

{{main|Ryanpeikou}}

* Nashi – Ryanpeikou is not used. In this case the hand will score two iipeikou for 2 han.

{{main|Ryuuiisou}}

* Excl – Exclude hatsu

{{main|Tenhou and chiihou}}

Score a self-drawn win within a hand's first uninterrupted go-around as a yakuman.

* Nashi – Score these wins as normal hands.

[[Category:Rule variations]]