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Riichi: Difference between revisions
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=== Kan during riichi === | === Kan during riichi === | ||
When a riichi declarer holds three identical tiles and draws the fourth after the riichi announcement, he may form an [[Kan|ankan]] from these tiles instead of discarding the fourth. The hand composition and the possible winning tiles may not change: it is not allowed to declare kan if, for some possible winning tile, any of the three identical tiles may be interpreted as part of a [[shuntsu|sequence]] or part of the pair. | |||
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. | |||
'''Example 1:''' | '''Example 1:''' | ||
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In this example, none of the waits are affected by any of the kan possibilities. The waiting tiles are completely unrelated to any of the existing triplets in this hand. Therefore, it is acceptable to call kan during riichi here. | In this example, none of the waits are affected by any of the kan possibilities. The waiting tiles are completely unrelated to any of the existing triplets in this hand. Therefore, it is acceptable to call kan during riichi here. | ||
'''Example 3:''' | |||
:{{#mjt:3335666p11456s}} Illegal kan: {{#mjt:36p}} | |||
Here, the waits are 457p. A kan on 6p would remove the 7p wait, so it is obviously not permitted. A kan on the 3p would not change the waits, however, if the hand was won with 4p, the hand could be interpreted as: | |||
:{{#mjt:33p}} {{#mjt:345p}} {{#mjt:666p}} {{#mjt:11s}} {{#mjt:456s}} | |||
In this case, the 3p does not form a [[koutsu|triplet]], but rather a pair and a part of a sequence. A kan on the 3p would remove this potential interpretation of the hand, and is therefore forbidden. | |||
=== Furiten === | === Furiten === | ||