Iipeikou: Difference between revisions

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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]].  Its feature composes of two identical [[mentsu#shuntsu|sequences]].  By identical, both shuntsu must be of the same number and same suit.  This pattern may also be produced twice in one hand, to form an alternative yaku, [[ryanpeikou]].  Finally, the hand must be closed only.  A single [[naki|open call]] invalidates the yaku, even if the pattern exists within the hand.
'''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.  A single [[naki|open call]] invalidates the yaku, even if the pattern exists within the hand.  If this pattern is found twice in one hand, an alternative yaku, [[ryanpeikou]], is scored.


==Tile pattern==
==Tile pattern==

Revision as of 03:56, 16 January 2017

Iipeikou
Type Yaku
Kanji 一盃口
English Identical sequences
Double sequences
Value 1 han (closed only)
Speed Medium
Difficulty Easy

Iipeikou 「一盃口」 is a standard yaku involving two identical sequences. Identical means that both shuntsu must be of the same numbers and suit. This yaku also requires the hand to be closed. A single open call invalidates the yaku, even if the pattern exists within the hand. If this pattern is found twice in one hand, an alternative yaku, ryanpeikou, is scored.

Tile pattern

Rearrangement

Arrangement of tiles is irrelevant, as long as two groups of tiles form the identical sequences.

Formation

This yaku is usually presented as three groups of consecutive pairs. However, the rule interpretation views them as a two sequences. Potential acquisition of this yaku is best recognizable when five out of the six tiles are present in the hand.

Compatability

^ Ippatsu requires riichi to be of any use.

RCH DRI IPP SMO TAN PFU IPK ITT YAK SDJ SDO TOI SNA SNK CHA JUN RPK SSG HRO HON CHN CHI RIN HAI HOU CHK
IPK

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.

Common combinations

External links

Iipeikou in Japanese Wikipedia