Rule variations: Difference between revisions

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

nashi – Not allowed

option – Tenhou.net offers both rules in different games. You can play kuitan nashi only if you play akadora nashi, see below. The Korean rules write "[concealed hand only selective]", which sounds as if kuitan were an optional rule.

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

ari – Atodzuke: Allow determination of yaku after determining the winning tile.

nashi – Sakidzuke: Require a fixed yaku no matter how the hand wins.

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).

swap – Forbid discarding the same tile, allow switching chii.

nashi – Forbid discarding the same tile, forbid switching chii.

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

0 – Start at zero points, but allow players to go into the negatives without consequences

25k–30k – Reaching a negative score aborts the hanchan.

Used at the end of a hanchan for the next two rules: If oka is used, first place gets a bonus payment, called the oka, of 3 × (goal − start score), paid evenly by the others. If shaaba is used, the game continues into the west round if no player has reached the goal score after the south round.

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

Jackpot for getting first. All three other players pay one third of this to first place after the end of the hanchan. These points are exchanged in addition to the 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.

ari – Continue into west round.

nashi – Always stop after south 4th hand.

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

ari – Flip the first ura dora indicator.

nashi – Don't flip it. Riichi declarers will know in advance how much their hand is worth.

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

late – After declaring ankan (concealed kantsu), flip the next dora indicator immediately. After declaring a minkan (open kantsu per call on a discard or per extension of a minkou), flip the next dora indicator only after declaring tsumo, declaring another kan, or discarding. The new dora indicator is in effect for any type of win.

nashi – Don't flip any dora indicators upon declaring kantsu.

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

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

ari – Require two han from yaku at five or more honba.

nashi – One han from yaku is always enough.

agari – The hand is repeated only when East wins.

nanba – The hand is repeated when East wins, or when East is tenpai upon exhaustive draw, or when there is any exhaustive draw during the nanba (south round).

option – The rules allow two possible options, agari and tenpai.

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.

ari – Allow the dealer to end the hanchan prematurely.

nashi – The game must continue until the seat winds rotate again.

Score two winning declarations at the same time.

check – Like ari, but the fourth player must reveal a non-winning hand, so that he cannot intentionally avoid the triple ron abortive draw.

nashi – Atama hane: head bump, recognize only the first win to the discarder's right.

Score three winning declarations at the same time.

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

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

turn – The player's next own discard ends temporary furiten. If his turn is skipped due to other players' pon calls, he remains temporarily furiten.

call – The players next own discard ends temporary furiten, but also any player's call of chii, pon, or kan, even for a concealed kantsu, ends temporary furiten.

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.

pon – Like pon above, but keep in mind that this is a computer game (C), not a ruleset for live play.

time – Pon trumps chii if called at the same time, otherwise the first call stands. Ron trumps anything, even if called slightly later.

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.

ari – Round up to mangan, i.e., score 8,000 or 12,000 points.

nashi – Score the exact values.

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.

tiebr. – The table winner gets the sticks. If several players tie for first place, better places are assigned according to initial winds.

back – The sticks go back to the players who bet them.

Keep track of player's scores during a hanchan.

tenbo – Scoring sticks (tenbo) are exchanged after each hand.

comp. – This is a computer game and it keeps track of scores automatically.

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

ari – Score ippatsu as an extra 1-han yaku.

nashi – Don't score ippatsu.

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

ari – Score daburu riichi as 2 han instead of 1 han.

nashi – Always score 1 han per riichi declaration.

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.

ari – Allow open riichi along with normal riichi.

nashi – Don't allow open riichi.

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?

ari KW – Score nagashi mangan as a win (W), voiding noten riichi chombos and collecting riichi bets and honba payments. It is legal to declare a concealed kantsu (K) and still score nagashi mangan.

nashi – Don't allow nagashi mangan.

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.

ari – Both yaku are allowed.

nashi – Neither yaku is allowed.

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 raoyui (winning with the last tile).

ari – Allow this combination. I consider this a bug in the 2012 EMA RCR.

nashi – Do not allow this combination. This is Japanese default.

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

4 han – Renhou is a 4-han yaku that combines with all others. Winning with only renhou is valid and worth mangan.

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

ari – Score this hand as a yakuman.

nashi – Score this hand normally. With the guaranteed yaku chinitsu, ryanpeiko, and pinfu, is worth at least 11 han.

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

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

ari – Score as a yakuman with 8,000 basic points.

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

Score each of the listed patterns as a double yakuman.

ari – Add one yakuman per single yakuman, add two yakuman per double yakuman if allowed, and score the sum.

nashi – Score only one yakuman per hand, or two yakuman if double yakuman are allowed.

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.

ari – Liable player pays full on tsumo, half on ron.

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.

ari – Liable player pays full on tsumo, half on ron.

nashi – No liability for suukantsu.

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.

ari – Score the hand as a ron if won before the next discard.

nashi – Score the hand as a tsumo.

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

2 fu – Award the hand 2 fu for tsumo.

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

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.

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

6c – If you topple six tiles or more, you get a chombo.

comp. – This is a computer game. The rules infraction cannot occur.

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