Ippatsu: Difference between revisions

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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.  
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.  


[[Naki|Tile calls]] may immediately end the chance for ippatsu any time before the riichi declarer draws the next tile.  This includes any calls for [[kan]], except for [[shouminkan]].  Once again, in order to award ippatsu, the cycle between a player's riichi discard and next turn to discard must be uninterrupted.  Even if the hand wins before the next tile draw, ippatsu does not count of a tile call was made previously.  Thus, players may actually use the option to make tile calls to deliberately deny a player that chance for ippatsu.
[[Naki|Tile calls]] may immediately end the chance for ippatsu any time before the riichi declarer draws the next tile.  This includes any calls for [[kan]], except for a robbed kan ([[chankan]]).  Once again, in order to award ippatsu, the cycle between a player's riichi discard and next turn to discard must be uninterrupted.  Even if the hand wins before the next tile draw, ippatsu does not count of a tile call was made previously.  Thus, players may actually use the option to make tile calls to deliberately deny a player that chance for ippatsu.
 
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.


== Examples ==
== Examples ==
[[Image:IppatsuRabbit.png|250px|thumb|right|[[Jigoku]] ippatsu tsumo by [https://www.youtube.com/watch?v=T0kzQ7bx7WM&t=3640s Pekora].]]
* [http://tenhou.net/0/?log=2013061615gm-0089-0000-x380955c19e8f&tw=0&ts=3 Ippatsu] after [[kan]].
* [http://tenhou.net/0/?log=2013061615gm-0089-0000-x380955c19e8f&tw=0&ts=3 Ippatsu] after [[kan]].


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In this example, the hand wins from an opponent discard before the next tile draw.  However, two tile calls were made prior to the win.  So, ippatsu is invalid here.
In this example, the hand wins from an opponent discard before the next tile draw.  However, two tile calls were made prior to the win.  So, ippatsu is invalid here.


== Compatability ==
== Compatibility ==
{{main|Yaku compatability}}
{{main|Yaku compatibility}}
{{Yaku compatibility table|IPP}}
{{Yaku compatibility table|IPP}}
Ippatsu is unique among the yaku, for it requires riichi to even be applicable.  Because of this, it is impossible for a hand to score with ippatsu alone.  Ippatsu ''can'' combine with [[chankan]], as the kan call is not considered complete if someone wins off it.
Ippatsu is unique among the yaku, for it requires riichi to even be applicable.  Because of this, it is impossible for a hand to score with ippatsu alone.  Ippatsu ''can'' combine with [[chankan]], as the kan call is not considered complete if someone wins off it.
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== External links ==
== External links ==
[[Category:Yaku]]
{{jpwiki|一発}}
{{jpwiki|一発}}


{{Navbox yaku}}
{{Navbox yaku}}
[[Category:Yaku]]
[[Category:Optional yaku]]
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