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Suukaikan is an [[abortive draw]] that occurs when a total of four kans have been called by at least two players. Once the fourth kan has been made, the [[kyoku|hand]] immediately ends once the kan-declarer discards a tile.
Suukaikan is an [[abortive draw]] that occurs when a total of four kans have been called by at least two players. Once the fourth kan has been made, the [[kyoku|hand]] immediately ends once the kan-declarer discards a tile.


However, if a single player makes four kans by themselves (thus entering tenpai for [[suukantsu]]), this draw does not occur. The game continues, giving the player a chance to score the yakuman. In many rulesets, the other players are not allowed to call a fifth kan to invoke the abortive draw; the fifth kan is simply not allowed. In a few rulesets, a player may call a fifth kan to immediately end the game in a draw,<ref>https://na.finalfantasyxiv.com/lodestone/playguide/contentsguide/goldsaucer/doman-mahjong/special_rule</ref> where fifth kan draw happens before [[chankan]] and [[rinshan]] can happen.
However, if a single player makes four kans by themselves (thus entering tenpai for [[suukantsu]]), this draw does not occur. The game continues, giving the player a chance to score the yakuman. What happens depends on the ruleset:
* In many rulesets, the other players are not allowed to call a fifth kan to invoke the abortive draw; the fifth kan is simply not allowed.  
* In a few rulesets, a player may call a fifth kan to immediately end the game in a draw.<ref>https://na.finalfantasyxiv.com/lodestone/playguide/contentsguide/goldsaucer/doman-mahjong/special_rule</ref> The fifth kan draw happens before [[chankan]] and [[rinshan]] can happen.


This abortive draw exists due to how the [[dead wall]] works. Each time a kan is declared, a tile is drawn from the dead wall. The dead wall is 14 tiles large, with 10 tiles reserved as [[dora]] indicators, leaving 4 tiles left for kan calls. After four kans, players would be unable to declare kan again, as the fifth kan would draw from the dora indicators. So, unless someone is in tenpai for suukantsu, the game ends immediately after the fourth kan, to avoid the issue of "players not being able to declare kan".
This abortive draw exists due to how the [[dead wall]] works. Each time a kan is declared, a tile is drawn from the dead wall. The dead wall is 14 tiles large, with 10 tiles reserved as [[dora]] indicators, leaving 4 tiles left for kan calls. After four kans, players would be unable to declare kan again, as the fifth kan would draw from the dora indicators. So, unless someone is in tenpai for suukantsu, the game ends immediately after the fourth kan, to avoid the issue of "players not being able to declare kan".


If this abortive draw is not used, then players are allowed to call kan until the 4th kan completes, and be unable to call kan thereafter.
If abortive draws are disabled, then players are allowed to call kan until a total of 4 kans have been made, and then be unable to call kan for the rest of the hand.


== Yaku ==
== Yaku ==
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