Kuikae: Difference between revisions

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'''Kuikae''' {{kana|喰い替え}}, commonly referred as "swap calling", is a restriction to discards after making a [[naki|tile call]]. When kuikae is disabled ("kuikae nashi"), when a player calls another player's discard, the following discard cannot be another copy of the tile they just called, nor can it be another tile that would also complete the chii that the player just called for.
'''Kuikae''' {{kana|喰い替え}}, commonly referred as "swap calling", is a rule on discards after making a [[naki|tile call]].  
 
If kuikae is disabled ("kuikae nashi"):
* When a player calls another player's discard, the following discard cannot be another copy of the just-called tile.
* When a player calls [[chii]], the following discard cannot complete the just-called chii.
 
Kuikae nashi is the more common rule used today.


== Examples ==
== Examples ==
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== Reasoning ==
== Reasoning ==
<!-- Why does this rule exist? -->
The main purpose of tile calls is to push hands forward and reduce the number of [[shanten]]. However, a kuikae call doesn't reduce the number of shanten, because the discarded tile would've completed the [[mentsu]].
The main purpose of tile calls is to push hands forward and reduce the number of [[shanten]]. However, a kuikae call doesn't reduce the number of shanten, as the tile to discard can make a group with the tiles used for calling to form a [[mentsu]]. This kind of behaviour is usually not recognized to be "meaningful" to the calling player, but to disturb other players, e.g. utilizing kuikae on purpose to eliminate [[ippatsu]] or [[Haitei raoyue and houtei raoyui|haitei]]. Without kuikae, it is still possible to make disruptive calls, but it becomes harder.


Note that kuikae is not always meaningless to the player himself/herself. The use of kuikae often includes:
When kuikae is allowed, players can:
* Call tiles in order to ''easily'' disrupt others. Players can make "meaningless" calls in order to interrupt other players' [[ippatsu]] or the [[haitei]] draw.
** Calls can also be used to skip having to draw a (potentially dangerous) tile late in the round. This can be especially important if in [[tenpai]], due to the [[noten]] penalty.
* Call tiles in order to ''easily'' raise the value of their hand. Kuikae can be used to change the end of a sequence (as shown in Example 1) to obtain yaku, such as [[tanyao]] or [[sanshoku]]. It can also be used to obtain dora, such as calling a [[red five]], then discarding a five afterwards.


# Skipping a chance to draw to prevent drawing a dangerous tile near the end of a [[Kyoku|round]], especially when in [[tenpai]], due to the [[Tenpai#Ryuukyoku|noten penalty]].  
By restricting kuikae, both cases become less prevalent: it is harder to disrupt players for the sake of disruption, and it is harder to gain value with an otherwise useless call. Allowing kuikae is not an inherently bad thing - these "disruptive" tactics have a strategy of their own. However, since players preferred to play with kuikae restrict, rulesets often include the kuikae rule.
# Changing the end of a shuntsu (as shown in Example 1) to obtain yaku, especially [[tanyao]], [[Sanshoku doujun|sanshoku]], [[chanta]], [[Ikkitsuukan|ittsu]], etc.  


While allowing kuikae is not inherently bad, more and more people preferred playing with kuikae disabled, so the kuikae rule became popular today.
Even in a kuikae nashi ruleset, it is possible to call tiles to disrupt others or gain value. As mentioned, though, it becomes harder to do so.


== Circumventing Kuikae ==
== Circumventing Kuikae ==
Retrieved from "https://riichi.wiki/Kuikae"