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Riichi: Difference between revisions
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Riichi is the most commonly used yaku in the game. This yaku may apply to any closed hand and may be declared upon achieving ''tenpai''. Due to its common usage, various specific game scenarios must be considered when using riichi. | '''Riichi''' (立直) is the most commonly used [[List of yaku|yaku]] in the game. This yaku may apply to any closed hand and may be declared upon achieving ''tenpai''. Due to its common usage, various specific game scenarios must be considered when using riichi. | ||
==Rules== | ==Rules== | ||
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=== Ippatsu === | === Ippatsu === | ||
'''Ippatsu''' (一発) is awarded if the player receives a winning tile within an uninterrupted set of turns after the winning declaration. Tile calls interrupt the set of turns. The latest possible chance to win with ippatsu is with the player's next drawn tile after the riichi declaration. Ippatsu is worth an extra 1 han. | |||
Ippatsu is worth an extra 1 han. | |||
=== Double riichi === | === Double riichi === | ||
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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 or part of the pair. | 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 or part of the pair. | ||