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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 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. | ||
== Examples == | == Examples == | ||
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== Reasoning == | == Reasoning == | ||
<!-- Why does this rule exist? --> | <!-- 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, 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: | |||
Note that kuikae is not always meaningless to the player himself/herself. The use of kuikae often includes: | |||
# 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]]. | # 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]]. | ||
# Changing the end of a shuntsu (as shown in Example 1) to obtain yaku, especially [[tanyao]], [[Sanshoku doujun|sanshoku]], [[chanta]], [[Ikkitsuukan|ittsu]], etc. | # 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. | |||
== 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 == | ||