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* Montr | * Montr | ||
:Mahjong Montreal, Canada | :Mahjong Montreal, Canada | ||
==Atozuke== | ==Atozuke== | ||
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* Ari – Atozuke: Allow determination of yaku after determining the winning tile. | * Ari – Atozuke: Allow determination of yaku after determining the winning tile. | ||
* Nashi – Sakizuke: Require a fixed yaku no matter how the hand wins. | * Nashi – Sakizuke: Require a fixed yaku no matter how the hand wins. | ||
==Dora== | |||
{{main|Dora}} | |||
===Akadora=== | |||
Use some red fives in place of normal fives as extra dora. | |||
* Ari – Use three red fives, one per suit. | |||
* Nashi – Don't use any red fives. | |||
* Option – Tenhou.net offers both rules in different games. You can play akadora ari only if you if you play kuitan ari. | |||
===Uradora=== | |||
Winning riichi declarers may flip the tile underneath the first dora indicator and treat that as another dora indicator. | |||
* Ari – Flip the first ura dora indicator. | |||
* Nashi – Don't flip it. Riichi declarers will know in advance how much their hand is worth. | |||
===Kandora=== | |||
After declaring a kantsu, another dora indicator is flipped in the dead wall. All four players can benefit from this. | |||
* Ari – Flip a new kan dora indicator after declaring a kantsu, but I don't know the exact timing rules. | |||
* Sokun. – Sokunori. After declaring any type of kantsu, flip the next dora indicator immediately. | |||
* 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. | |||
===Kanuradora=== | |||
Winning riichi declarers may flip the tile underneath each kan dora indicator and treat that as another dora indicator. | |||
==Kuikae== | ==Kuikae== | ||
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* Swap – Forbid discarding the same tile, allow switching chii. | * Swap – Forbid discarding the same tile, allow switching chii. | ||
* Nashi – Forbid discarding the same tile, forbid switching chii. | * Nashi – Forbid discarding the same tile, forbid switching chii. | ||
==Kuitan== | |||
{{main|Kuitan}} | |||
Allow the 1-han yaku tanyao (all simples) to be awarded to an open hand. | |||
* Ari – Allowed | |||
* Nashi – Not allowed | |||
* Option – Tenhou.net offers both rules in different settings. One of the game rooms is set for both kuitan nashi snd akadora nashi. However, there is no setting for one or the other exclusively. The Korean rules write "concealed hand only selective", which sounds as if kuitan were an optional rule. | |||
==Scoring== | ==Scoring== | ||
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* Kan noten - The hand is declared as noten at [[ryuukyoku]], if all of a player's waits are used for one's own kan. The hand is declared as tenpai for all other cases. | * Kan noten - The hand is declared as noten at [[ryuukyoku]], if all of a player's waits are used for one's own kan. The hand is declared as tenpai for all other cases. | ||
==Tochuu ryuukoku== | ==Tochuu ryuukoku== | ||