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Iipeikou: Difference between revisions
extra clarify the conditions for iipeikou
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|gameExample = * [http://tenhou.net/0/?log=2014011309gm-0009-7447-f766aece&tw=0&ts=4 Iipeikou] with [[damaten]] | |gameExample = * [http://tenhou.net/0/?log=2014011309gm-0009-7447-f766aece&tw=0&ts=4 Iipeikou] with [[damaten]] | ||
}} | }} | ||
'''Iipeikou''' {{kana|一盃口}} is a standard [[yaku]] | '''Iipeikou''' {{kana|一盃口}} is a standard [[yaku]] involving two identical [[mentsu#Shuntsu|sequences]]. Identical means that both [[shuntsu]] must be of the same numbers and suit. This yaku also requires the hand to be closed. Any [[naki|open call]] ruins the yaku, even if the pattern already existed within the hand. If this pattern is found twice in one hand, an alternative yaku, [[ryanpeikou]], is scored. | ||
==Tile pattern== | ==Tile pattern== | ||
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==Formation== | ==Formation== | ||
This yaku | This yaku usually appears as three groups of consecutive pairs. However, the rule interpretation views them as a two [[shuntsu|sequences]]. Potential acquisition of this yaku is best recognizable when five out of the six tiles are present in the hand. | ||
=== | Note that iipeikou requires the hand to be closed. If you make any open call (chii/pon/open kan), iipeikou can never be scored, even if the call was unrelated to the identical sequences. However, the ''sequences'' do not have to be closed: if you declare [[ron]] with a closed hand, iipeikou can still be scored, even if the winning tile completed the 2nd identical sequence. | ||
{{main|Yaku | |||
=== Compatibility === | |||
{{main|Yaku compatibility}} | |||
{{Yaku compatibility table|IPK}} | {{Yaku compatibility table|IPK}} | ||
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Iipeikou requires two sequences, and as a result is incompatible with [[sanshoku doukou]], [[toitoi]], [[honroutou]], [[chiitoitsu]], [[sanankou]], and [[sankantsu]], all of which require either at least three [[koutsu]]/[[kantsu]] or a seven pair structure. The final incompatibility is with [[ryanpeikou]], as ryanpeikou implies iipeikou and so iipeikou is not counted. | Iipeikou requires two sequences, and as a result is incompatible with [[sanshoku doukou]], [[toitoi]], [[honroutou]], [[chiitoitsu]], [[sanankou]], and [[sankantsu]], all of which require either at least three [[koutsu]]/[[kantsu]] or a seven pair structure. The final incompatibility is with [[ryanpeikou]], as ryanpeikou implies iipeikou and so iipeikou is not counted. | ||
Iipeikou is often combined with [[pinfu]], which also requires sequences. Iipeikou can naturally be obtained with shapes like 4456 and 4556, which a pinfu hand may have due to [[tile efficiency]] reasons. | |||
==External links== | ==External links== | ||