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Ippatsu: Difference between revisions
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state that the player's own kan will lose ippatsu
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'''Ippatsu''' {{kana|一発}} is a yaku completely dependent on [[riichi]]. By definition, ippatsu requires a riichi declaration to be in effect, for an additional 1 han. Therefore, ippatsu cannot function as a stand-alone yaku. | '''Ippatsu''' {{kana|一発}} is a yaku completely dependent on [[riichi]]. By definition, ippatsu requires a riichi declaration to be in effect, for an additional 1 han. Therefore, ippatsu cannot function as a stand-alone yaku. | ||
It is awarded if the player receives a winning tile within an uninterrupted set of opponent tile draws after the riichi declaration. The earliest possible chance to win with ippatsu comes from the shimocha's discard (player to the right). The latest possible chance to win with ippatsu is with the player's next drawn tile after the riichi declaration. If | It is awarded if the player receives a winning tile within an uninterrupted set of opponent tile draws after the riichi declaration. The earliest possible chance to win with ippatsu comes from the shimocha's discard (player to the right). The latest possible chance to win with ippatsu is with the player's next drawn tile after the riichi declaration. If someone [[Naki|calls a tile]] during this period, then this yaku is invalidated. | ||
While ippatsu is generally considered to be a standard yaku, certain [[rule variations|rulesets]] do not use it, in order to reduce variance and lower the value of a riichii. In general, when sitting down to play a game, ippatsu is counted unless otherwise specified or agreed on before the game. | While ippatsu is generally considered to be a standard yaku, certain [[rule variations|rulesets]] do not use it, in order to reduce variance and lower the value of a riichii. In general, when sitting down to play a game, ippatsu is counted unless otherwise specified or agreed on before the game. | ||
== Cancellation == | == Cancellation == | ||
In order for ippatsu to be counted, the hand must win before the hand in riichi discards its next tile. Furthermore, no interruption to the turn must occur. This means that [[Naki|tile calls]] will immediately end the chance for ippatsu | In order for ippatsu to be counted, the hand must win before the hand in riichi discards its next tile. Furthermore, no interruption to the turn must occur. This means that [[Naki|tile calls]] will immediately end the chance for ippatsu. This includes any calls for [[kan]] ''except'' for a robbed kan ([[chankan]]). In [[sanma]], the call for [[kita]] also denies ippatsu. If the riichi player declares kan or kita, ippatsu is still denied. | ||
In other words: even if a hand is won before the next discard, if a call is made, ippatsu is denied. Thus, players can purposefully make tile calls in order to disrupt another player's chance for ippatsu. | |||
== Examples == | == Examples == | ||