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Kuikae: Difference between revisions
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'''Kuikae''' {{kana|喰い替え}} is a | '''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 == | ||
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]]. When kuikae is allowed, players can make calls that do not advance their hand, but achieve other goals. | |||
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. | |||
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 more players prefer to play with kuikae restricted, the kuikae restriction became more popular to use. Today, kuikae nashi is the standard rule, and most places include some form of it. | |||
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 == | ||
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If {{#mjt:1p}} was the only [[yaochuuhai]] in the hand, the hand now acquires tanyao. This would not have been possible if the player called chii with {{#mjt:23p}} to form {{#mjt:4'23p}}, in which case discarding {{#mjt:1p}} would be forbidden by kuikae. | If {{#mjt:1p}} was the only [[yaochuuhai]] in the hand, the hand now acquires tanyao. This would not have been possible if the player called chii with {{#mjt:23p}} to form {{#mjt:4'23p}}, in which case discarding {{#mjt:1p}} would be forbidden by kuikae. | ||
==Rule Variations== | |||
{{Main|Rule_variations#Kuikae}} | |||
Many, if not most, rulesets disallow kuikae. There are a few variations to the rule, though: | |||
* Generally, when kuikae is not allowed, you are unable to discard the exact tile drawn, and when calling chii, are unable to discard any tile that would complete said chii. | |||
* Some rulesets (such as [[Japan Professional Mahjong League|JPML A]]) may disallow discarding the exact tile that was called, but allow any other discard. For example, under this rule, with a sequence of 123, you can call chii on 4, discard 1, and have a 234 set. | |||
== External links == | == External links == | ||