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# | [[Image:Dead Wait.png|thumb|right|250px|Example of a karaten riichi, with all waiting tiles circled in red.]] | ||
[[Image:Keishiki ankan.png|right|thumb|250px|Karaten tenpai acquired [https://mahjongsoul.game.yo-star.com/?paipu=190508-4ebd32bc-71a5-4f4f-86a7-16066dfdc896_a925124703 after calling kan].]] | |||
[[Image:Karatenpon.png|right|thumb|250px|Karaten situation, where the winning tiles to a [[hadaka tanki]] were called for pon earlier.]] | |||
'''Karaten''' {{kana|カラテン}}, or '''empty tenpai''', is a [[tenpai]] hand that cannot win because all possible winning tiles are unavailable. The "visible tiles" may either be discarded, used as a dora indicator, and/or already exist in one's hand. In addition the tiles may be held in other players' hands or in the dead wall, but these would be unknown to the player. | |||
Karaten hands are generally considered tenpai for the purpose of [[ryuukyoku]], except if all four copies of the winning tile are in the player's own hand. | |||
==The fifth tile case== | |||
When a hand has all four copies of a tile, and is waiting on a fifth copy of a tile, it may not considered tenpai at all. Example: | |||
{{#mjt: 123456789m5555p}} Waiting for: {{#mjt: 5p}} (impossible) | |||
If this hand could obtain a fifth 5-pin, it could win by completing a triplet and pair. | |||
{{#mjt:12m444p678s1180z33m0z}} Waiting for: {{#mjt:3m}} | |||
Similarly, this hand could complete a sequence if there was a fifth 3-pin, but all four are part of a [[kan]]. | |||
This is subject to rule variation. In some platforms, hands like these still count towards tenpai. | |||
===Cases=== | |||
* On Ron2, there has been an instance of a person being able to call riichi with a gutshot wait shape for a 6-pin when they have made a closed kan of 6-pin already. The hand was considered noten, but did not trigger a chombo penalty (mainly due to programming assuming no one could do something that could be viewed as faulty). The hand was not in a valid tenpai shape when it came to scoring a drawn hand, but not okay for determining if a player was legally allowed to declare [[riichi]]. | |||
* On Tenhou, there have been reports of a hand containing 12s44466688p with a kan of 3s, scored as in tenpai. | |||
* Likewise, the same kind of case is allowable in [[Mahjong Soul]]. | |||
==External links== | |||
[[Category:Terminology]] |
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