Iipeikou: Difference between revisions

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

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Revision as of 21:27, 25 February 2014

Iipeikou 「一盃口」 is a standard yaku. Its feature composes of two identical sequences. By identical, both shuntsu must be of the same number and same suit. This patter may also be produced twice in one hand, to form an alternative yaku, ryanpeikou.

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

Main article: Yaku 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

Value

Han/Fu	Ron		Han/Fu	Tsumo
Han/Fu	Non-dealer	Dealer	Han/Fu	Non-dealer	Dealer
Minimum possible			With mentsumo
1 - 40	1300	2000	2 - 30	1000/500	500
Maximum without other yaku			With mentsumo
1 - 80	2300	3400	2 - 70	1300/2600	2600

This yaku is required to be closed only. Even if the pattern exists within an open hand, the yaku will not be counted in this case.

Minimum

Agari:

Maximum (when not seated north)

Agari:

The lowest possible score for a iipeikou nomi (only) hand is 1 han and 40 fu. The 40 fu is derived from a closed ron (10 fu) plus possession of another fu generated form, either by certain wait patterns or triplet(s). In order for the hand to involve 30 fu, it would have to involve pinfu with the closed ron. Likewise, a win by tsumo may involve a similar form. Given the closed only aspect of this hand, it is unavoidable to score an "iipeikou only" hand without a combination with closed tsumo.

The highest possible score for an iipeikou nomi (only) hand is 1 and 80 fu. The 80 fu is derived from two groups of non-yakuhai honor tiles or terminals used for closed kans. With that, the wait pattern involves a single tile. For tsumo, the difference again involves a closed tsumo and the lack of 10 fu derived from a closed ron. Naturally, when combined with other yaku, the score can be significantly higher.

External links

一盃口

Iipeikou in Japanese Wikipedia

@@ Line 46: / Line 46: @@
 |}
 This yaku is required to be closed only.  Even if the pattern exists within an open hand, the yaku will not be counted in this case.
+* '''Minimum'''
+: {{#mjt: 556677p13m44466s}} Agari: {{#mjt: 2m}}
+* '''Maximum''' ''(when not seated north)''
+: {{#mjt: 556677s2m}} {{#mjt:0z11s00440z}} Agari: {{#mjt: 2m}}
 The lowest possible score for a iipeikou nomi (only) hand is 1 han and 40 fu.  The 40 fu is derived from a closed ron (10 fu) plus possession of another fu generated form, either by certain [[machi|wait patterns]] or [[koutsu|triplet(s)]].  In order for the hand to involve 30 fu, it would have to involve pinfu with the closed ron.  Likewise, a win by tsumo may involve a similar form.  Given the closed only aspect of this hand, it is unavoidable to score an "iipeikou only" hand without a combination with [[mentsumo|closed tsumo]].