World Rules

This is a webpage version of [XLS] Sylvain's Excel spreadsheet. Back to my RCR committee page.

If you have info about the missing fields in red, please contact me – see very bottom of this page.

WoRR Ema2 JpmlA JpmlB NPM Skoui SkouC MuMa RmuA 101 Tenho Skyos Korea Uspml Montr
Kuitan ari ari ari ari ari ari ari ari ari option ari option ari ari Kuitan
Atodzuke ari ari ari ari ari ari ari ari ari ? ari ari ? ari ari Atodzuke
Kuikae full swap ? full full full Kuikae
Kuikae penalty ? ? ? ? ? comp. ? dead ? 1k Kuikae penalty
Start score 30k 0 30k 30k 25k 30k 30k ? 30k ? 25k 25k 30k 29k 25k Start score
Goal score 30k 0 30k 30k 30k 30k 30k ? 30k ? 30k 30k 25k 29k 30k Goal score
Tobi (bankrupt) ? ? ? ? negat. negat. negat. Tobi (bankrupt)
Shaaba (west rnd.) ? ? ? ? ? ari ? ari Shaaba (west rnd.)
Leftover riibo lost share lost lost ? ? ? lost ? ? tiebr. ? tiebr. back share Leftover riibo
Shared placings ari ari ari ? ? ? ? ? ? ? ? ? ari Shared placings
Score rounding divide divide ? divide divide divide ? divide ? 234 ? r? div divide Score rounding
Oka 0 0 0 0 5k 0 0 ? 0 ? 5k 0 0 0 0 Oka
Uma 15/5 30/10 12 sh. 15/5 30/10 30/10 12/4 ? 15/5 ? 20/10 30/10 20/10 30/15 0 Uma
Akadora ari option Akadora
Uradora ari ari ari ari ari ari ari ari ari ari ari Uradora
Kandora sokun. sokun. ari ari ari ari late ari sokun. sokun. akagi Kandora
Kanuradora ari ari ari ari ari ari ari ari ari ari ari Kanuradora
Ryanhan shibari ari ari Ryanhan shibari
Renchan tenpai tenpai tenpai tenpai tenpai tenpai agari ? tenpai tenpai tenpai tenpai option tenpai nanba Renchan
Honba value 100 100 100 100 100 ? ? ? ? ? 100 ? ? 100 Honba value
Agari yame ari ? ari ? ari ari ari ari ari Agari yame
Abortive draw ari ari ari ? ari ari ari Abortive draw
Double ron Rback ? R 1st check Double ron
Triple ron ata.h. ari abort abort ata.h. ata.h. ata.h. ? ata.h. ? abort ? ata.h. abort abort Triple ron
Furiten riichi ari ari ari ari ? ? ? ari ari ? ari ari ari ari ari Furiten riichi
Temp. furiten turn call turn turn ? ? ? ? ? ? turn ? ? turn turn Temp. furiten
Call precedence pon pon first first ? ? ? ? pon ? pon C ? first pon pon Call precedence
Kiriage mangan ari ari ari ari ari ari ari ari ari Kiriage mangan
Scorekeeping option paper tenbo tenbo ? ? ? ? ? ? comp. ? paper tenbo tenbo Scorekeeping
WoRR Ema2 JpmlA JpmlB NPM Skoui SkouC MuMa RmuA 101 Tenho Skyos Korea Uspml Montr
Ippatsu ari ari ari ari ari ari ari ? ari ari ari Ippatsu
Daburu riichi ari ari ari ari ? ari ari ari ? ari ari ari Daburu riichi
Open riichi ? ? ? ari ari Open riichi
Nagashi mangan KW W ? B ? DW ari W Nagashi mangan
Haitei/houtei ari ari ari ari ari ari ari ? ari ari ari ari ari ari Haitei/houtei
Haitei rinshan ari ? ? ? ? ? ari ari Haitei rinshan
Tenhou/chihou ari ari ari ari ari ? ? ? ari ari ari ari ari ari Tenhou/chihou
Renhou 5 han yak. mang. mang. 4 han ? yak. mang. mang. Renhou
Kokushi ankan ron ari ari ari ari ? ? ? ? ? ari Kokushi ankan ron
Hatsu in ryuuiisou opt. opt. requi. opt. opt. opt. opt. ? ? opt. opt. opt. opt. ? opt. Hatsu in ryuuiisou
Daisharin ? ? ari ari Daisharin
Paarenchan ari Paarenchan
Kazoe yakuman ari ? baim. ari ari ari ari Kazoe yakuman
Double yakuman D ? ? DSK9 DSK9 Double yakuman
Comb. yakuman ? ? ? ? ari ari ari ? ari Comb. yakuman
DaiSG/DaiSS pao ari ari ari ari ari ari ? ari ari ari ari DaiSG/DaiSS pao
Suukantsu pao ari ari ari ? ari ari ari Suukantsu pao
Daiminkan pao ari ari Daiminkan pao
Honba on pao ron ron ron* pao pao ? ? ron ? ? ron Honba on pao ron
WoRR Ema2 JpmlA JpmlB NPM Skoui SkouC MuMa RmuA 101 Tenho Skyos Korea Uspml Montr
Rinshan fu 2 fu 2 fu ? ? ? ? ? ? 2 fu ? 2 fu ? ? ? 0 fu Rinshan fu
Double wind pair 4 fu 4 fu 4 fu 4 fu ? ? ? ? 2 fu ? ? 2 fu ? ? 4 fu Double wind pair
False ron, unrev. chbo. dead ? ? ? ? ? ? ? ? dead dead ? chbo. False ron, unrev.
Wall toppling 6c 6c ? ? ? ? ? ? ? ? ? ? ? 1k 6c Wall toppling
Dead w. toppling 1d 6c 1d 6c ? ? ? ? ? ? ? ? ? ? ? 1k 6c Dead w. toppling
Chombo penalty 20k E mang. 20k E 20k E 40k E 40k E 16k E 3×3k ? 20k O 12k 10k E ? mang. Chombo penalty
WoRR Ema2 JpmlA JpmlB NPM Skoui SkouC MuMa RmuA 101 Tenho Skyos Korea Uspml Montr

Ruleset authorities

Name of organization or ruleset Official rulebook
WoRR Word Riichi Rules for the tourney in France, 2014. [PDF] English
Ema2 European Mahjong Association Riichi Competition Rules from 2012 [PDF] English
JpmlA Japan Professional Mahjong League (JPML) ruleset A. (tr) English Japanese
JpmlB Japan Professional Mahjong League (JPML) ruleset B
NPM Nihon Pro Mahjong (NPM), also called Kyoukai (tr) English [PDF] Japanese
Skoui Saikouisen, the oldest Japanese professional league (tr) English Japanese
SkouC Saikouisen Classic (tr) English Japanese
MuMa Mu Mahjong (tr) English Japanese
RmuA Real Mahjong Unit (RMU) ruleset A. (tr) English Japanese
101 Ruleset of 101, another Japanese league (tr) English Japanese
Tenho Tenhou.net, a popluar internet game site (tr) English Japanese
Skyos Saikyousen, a tournament in Japan run by Takeshobo. (tr) English Japanese
Korea Korean Mahjong League (KML) [PDF] English [PDF] Japanese
Uspml United States Professional Mahjong League (USPML) English
Montr Club Riichi de Montreal, Canada

(tr) denotes an unofficial machine translation of the official Japanese rules text.

Rule details

Kuitan

Allow the 1-han yaku tanyao (all simples) to be awarded to an open hand.

Atodzuke

Allow the hand to win even if there exists no yaku that is satisfied with all wait tiles. Atodzuke nashi, also called sakidzuke ari, requires all winning possibilities to satisfy at least one same yaku. Sakidzuke requires some

Kuikae

Allow a player to call pon or chii on a tile, then afterwards discard the same tile, or a tile which would have completed the two revealed tiles at the other end of the sequence (switching chii). If such discards are forbidden, a penalty must be chosen for players who violate it, see kuikae penalty below.

Kuikae penalty

What happens if a player calls a tile and makes an illegal discard afterwards due to the kuikae rule above?

Start score

Each player has this many points at the start of a hanchan.

Goal score

Used at the end of a hanchan for the next two rules: If oka is used, first place gets a point jackpot, called the oka, of (goal − start score) from each player. If shaaba is used, the game continues into the west round if no player has reached the goal score after the south round.

Tobi (bankrupt)

End the hanchan prematurely if a player has less than 0 points at the end of a hand.

Shaaba (west rnd.)

If nobody has reached the goal score at the end of south 4th hand, then the game continues into the west round. The game immediately stops after any hand during the west round in which a player reaches the goal score. The game never continues into the north round.

Leftover riibo

If the last hand of the hanchan is a draw, there may be leftover riichi sticks on the table. This rule decides what happens with them.

Shared placings

If two players have the same raw score before any rounding, some rules have them share their placings, splitting equally any associated poins from uma and oka. Other rulesets use the common tiebreaker of seat wind during the very first game of the hanchan.

Score rounding

Some rulesets divide the raw scores by 1,000 to calculate hanchan scores. This rule specifies whether that's done, and how the points are rounded before division. Even if players end up with the same rounded score, placing has been determined with the unrounded score, thus determining uma and oka.

Oka

Jackpot for getting first. All players pay this amount into the jackpot, then first place takes it at the end of the hanchan. These points are exchanged in addition to the uma. It's uncommon to award oka in rulesets that allow for shared placings, see above.

Uma

This is a placing bonus for first and second place after a hanchan. First place receives (larger amount × 1,000) points from forth place, and second place receives (lower amount × 1,000) from third place. These points are exchanged in addition to the oka.

Akadora

Use some red fives in place of normal fives as extra dora.

Uradora

Winning riichi declarers may flip the tile underneath the first dora indicator and treat that as another dora indicator.

Kandora

After declaring a kantsu, another dora indicator is flipped in the dead wall. All four players can benefit from this.

Kanuradora

Winning riichi declarers may flip the tile underneath each kan dora indicator and treat that as another dora indicator.

Ryanhan shibari

Impose a two-han minimum at five or more honba (number of table counters). The two han must both come from yaku.

Renchan

Honba value

For each honba (tsumiboukaten, bonus stick) on the table, winning hands increase in value by 3 × the given amount; either distributed evenly among all opponents upon tsumo, or all paid by the discarder upon ron. There is a related rule, honba on pao ron, which decides who has to pay the honba in case of liability payment (sekinin barai, the pao rule).

Agari yame

Allow the dealer to end the hanchan prematurely if he wins the south 4th hand and ends up in first place, or if that hand becomes an exhaustive draw and the dealer ends up first.

Abortive draw

Abort a hand and repeat it at the next honba (number of table counters) in case of nine terminals and honors, same wind discards, four riichi declarations, or four kantsu declarations. Some rules abort the hand upon a triple ron; that is not covered by this rule, instead see triple ron.

Double ron

Score two winning declarations at the same time. If East is among the winners, a honba is added and the round is repeated. There are different rules for who gets the riichi sticks on the table.

Triple ron

Score three winning declarations at the same time.

Furiten riichi

Allow players to declare riichi while they are fuiten due to their own earlier discards.

Temp. furiten

If a non-riichi player ignores a winning tile, he becomes temporarily furiten. There are different rules to when this status wears off.

Call precedence

If several players call chii, pon, or ron on the same tile, this rule decides who will get the tile. Kan calls are treated like pon calls.

Kiriage mangan

Score 4 han, 30 fu as a mangan, as well as 3 han, 60 fu. The exact values for these hands are 7,700 points on a non-dealer ron, split as 2,000 and 3,900 on a non-dealer tsumo, and 11,600 points on a dealer ron, split as 3,900 for all on a dealer tsumo.

Scorekeeping

Keep track of player's scores during a hanchan.

Ippatsu

Score an additional han for winning a riichi declaration within the next go-around.

Daburu riichi

Score riichi as 2 han yaku instead of 1 han if called within the first uninterrupted go-around of a hand.

Open riichi

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 his hand at the same time as he pays the bet of 1,000 points.

Nagashi mangan

Score a mangan upon exhaustive draw for having discarding only yaochuuhai during the entire hand, with none of the yaochuuhai having been called by other players, and without having called any tiles oneself. If this is allowed, there are additional rules decisions necessary: Does it count as a win, or merely as replacement of the noten penalty? Are concealed kantsu allowed?

Haitei/houtei

Score the 1-han yaku haitei raoyue for winning with the last tile from the live wall, or score the 1-han yaku houtei raoyui for winning on a discard while the live wall is empty.

Haitei rinshan

When a kantsu is declared with exactly one tile left in the live wall, that tile, called the haiteihai, is appended to the dead wall and never drawn. This rule makes the replacement tile the haiteihai, so winning with that tile scores both rinshan kaihou (winning after kan) and haitei raoyue (winning with the last tile).

Tenhou/chihou

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

Renhou

This is a yaku for winning on a discard before the winner's first turn in an uninterrupted go-around.

Kokushi ankan ron

Allow a ron declaration against ankan (concelaed kantsu) with a kokushi musou (thirteen orphans) tenpai, waiting on only the kanned tile. It's always legal to interrupt a shominkan (added kantsu) declaration or to override a daiminkan (kantsu formed with a discard) call with ron, even if ankan ron is not allowed.

Hatsu in ryuuiisou

Require hatsu (green dragon) in a hand to score it as ryuu iisou (all green). All of 2, 3, 4, 6, 8-sou are optional in any ruleset.

Daisharin

Score the concealed single-suit hand 2-2-3-3-4-4-5-5-6-6-7-7-8-8 as a yakuman.

Paarenchan

Score the eighth consecutive win of the same dealer as a yakuman.

Kazoe yakuman

Score a hand with 13 han or more as a yakuman.

Double yakuman

Score each of the listed patterns as a double yakuman.

Comb. yakuman

Score more than one yakuman if multiple yakuman are achieved by the same hand.

DaiSG/DaiSS pao

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

Suukantsu pao

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

Daiminkan pao

After forming a daiminkan (kan declaration on a discard with three concealed identical tiles), score a win with rinshan kaihou (winning on the replacement tile after a kan call) as a ron against the discarder of the called tile. Fu and han are always calculated normally for a tsumo, even if the rule has the hand be paid by only one player.

Honba on pao ron

When one player is liable (i.e., pao, or sekinin barai) for a hand and another player deals into the hand, they share the hand's value fifty-fifty. The bonus payment for honba is not shared fifty-fifty, but paid by only one player specified by this rule.

Rinshan fu

Award a hand winning with the rinshanpai (kan replacement tile) the usual 2 fu for winning with a self-drawn tile.

Double wind pair

A hand with four groups and a pair might have a double wind pair, i.e., a pair of winds that are both the round wind and the seat wind. This rule decides how many fu such a double wind pair is worth.

False ron, unrev.

What is the penalty for declaring a false ron, but immediately noticing the mistake and not revealing any tiles?

Wall toppling

What is the penalty for toppling tiles from the live wall?

Dead w. toppling

What is the penalty for toppling tiles from the dead wall?

Chombo penalty

The chombo penalty is paid for severe rules infractions. The current hand is aborted and replayed at the same honba.

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