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Kan: Difference between revisions
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→Kan during riichi
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Under most professional rulesets, a player is not allowed to call kan if it would change the hand's possible winning tiles, or if it would change any possible interpretation of the hand. If, for any winning tile, any of the three identical tiles can be interpreted as part of a [[shuntsu|sequence]] or part of the pair, the kan is not allowed. | Under most professional rulesets, a player is not allowed to call kan if it would change the hand's possible winning tiles, or if it would change any possible interpretation of the hand. If, for any winning tile, any of the three identical tiles can be interpreted as part of a [[shuntsu|sequence]] or part of the pair, the kan is not allowed. | ||
Under some rulesets, such as in [[tenhou.net]] and [[Mahjong Soul]], an alternative is used: so long as a kan does not change the hand's possible winning tiles, the kan is allowed. (I.e., | Under some rulesets, such as in [[tenhou.net]] and [[Mahjong Soul]], an alternative is used: so long as a kan does not change the hand's possible winning tiles, the kan is allowed. (I.e., changing the hand interpretation is allowed.) | ||
If a player does declare a kan illegally during riichi, and they call [[ron]] or the game goes to an [[ryuukyoku|exhaustive draw]], then they will be penalized with a [[chombo]] penalty for breaking the rule. If a player is not required to reveal their hand, or if another player wins, they will normally not be penalized. | If a player does declare a kan illegally during riichi, and they call [[ron]] or the game goes to an [[ryuukyoku|exhaustive draw]], then they will be penalized with a [[chombo]] penalty for breaking the rule. If a player is not required to reveal their hand, or if another player wins, they will normally not be penalized. | ||