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Honroutou (view source)

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* [http://tenhou.net/0/?log=2014012816gm-0009-7447-3851d1db&tw=1&ts=5 With] [[sanshoku doukou]]
* [http://tenhou.net/0/?log=2014012816gm-0009-7447-3851d1db&tw=1&ts=5 With] [[sanshoku doukou]]
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'''Honroutou''' {{kana|混老頭}} is a standard yaku, focusing on just the [[honor]]s and [[terminals]]. To score honroutou, the hand must contain only honors and terminals. The hand must contain at least one honor and one terminal; an all honor hand would be [[tsuuiisou]], while an all terminal hand would be [[chinroutou]].  
'''Honroutou''' {{kana|混老頭}} is a [[yaku]] scored when every tile in the hand is either a [[terminal]] or an [[honor]] tile. The hand must contain at least one honor and one terminal to score honroutou; an all honor hand would be [[tsuuiisou]], while an all terminal hand would be [[chinroutou]].  


==Tile pattern==
==Tile pattern==
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==Formation==
==Formation==
This yaku requires every tile to be a [[terminal]] or [[honor]] tile. [[Shuntsu|Sequences]] are not allowed, because a sequence always contains non-terminal tiles. Naturally, a concentration of honor and terminal tiles are required to even consider this yaku. A majority of honroutou hands are open, using [[pon]] to complete a triplet-based hand.
Because every tile must be a [[terminal]] or [[honor]], [[sequence]]s are not allowed, since a sequence always contains non-terminal tiles. Naturally, a large amount of honors/terminals are required to even consider this yaku. A majority of honroutou hands are open, using [[pon]] to complete a triplet-based hand.


== Compatibility ==
== Compatibility ==
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{{Yaku compatibility table|HRO}}
{{Yaku compatibility table|HRO}}


Honroutou is not compatible with any yaku which require a sequence, which accounts for most of the incompatibilities (including [[chankan]], which must always win on a sequence wait). [[Tanyao]] is incompatible because it requires no terminals or honours, and honroutou requires only those tiles. [[Chantaiyao]] is incompatible because it is implied by honroutou. Finally, if [[honroutou]] is combined with [[junchan]], the entire hand must be terminals, which gives the [[chinroutou]] yakuman.
Honroutou is not compatible with any yaku which require a sequence, which accounts for most of the incompatibilities (including [[chankan]], which must always win on a sequence wait). [[Tanyao]] is incompatible because it requires no terminals or honours, and honroutou requires only those tiles. [[Chanta]] is incompatible because it is implied by honroutou. Finally, if [[honroutou]] is combined with [[junchan]], the entire hand must be terminals, which gives the [[chinroutou]] yakuman.


==Value==
==Value==
It is impossible to score this yaku without at least either [[toitoi]] or [[chiitoitsu]]. So this yaku is, at minimum, worth 4 han.
It is impossible to score this yaku without at least either [[toitoi]] or [[chiitoitsu]]. Therefore, every hand that scores honroutou is worth at least 4 han.


When factoring [[fu]], the combination of [[koutsu|ankou]] and [[koutsu|minkou]] (closed and open triplets) produces a fu count of higher than 10. The lowest possible fu is generated with 4 minkou, leading to [[tanki|hadaka tanki]] (lone pair wait).  Adding the base 20 fu for any hand, this yaku is guaranteed greater than 30 fu; and with the rules of fu, that number is actually rounded up to at least 40 fu. Therefore, a honroutou composed of ankou and minkou is at minimum a [[mangan]].
In toitoi form, honroutou is always worth a [[mangan]] at minimum. The lowest scoring hand would have 36 [[fu]] (20 fu for winning; 4 open terminal triplets, worth 4 fu each), which is then rounded up to 40 fu. A 4 han 40 fu hand scores mangan. Such a hand is shown below:


Example:
:{{#mjt:11p99s}} {{#mjt:999'm4'443'33z}}  Ron: {{#mjt:1p9s}}
:{{#mjt:9s}} {{#mjt:1'11p999'm4'443'33z}}  Agari: {{#mjt:9s}}
 
This is the second lowest possible honroutou, if not played in the West round.  For each of the open calls, they are worth 4 fu.  In combination, they add up to 16 fu.  Then add the [[tanki]] (pair wait) for 2 fu.  In total, this hand has 18 fu, in addition to the base 20 fu; and that makes 38 fu.  Per the [[scoring|scoring rules]], the number is rounded up to 40 fu.  With a minimum of 4 han and 40 fu, this hand is guaranteed at least mangan when chiitoitsu is not involved.


The lowest scoring honroutou is a [[chiitoitsu]] won by ron without riichi or dora.  
The lowest scoring honroutou is a [[chiitoitsu]] won by ron without riichi or dora.  
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:{{#mjt:99m11p1199s22334z}}  Ron: {{#mjt:4z}}
:{{#mjt:99m11p1199s22334z}}  Ron: {{#mjt:4z}}


This hand scores 4 han and 25 fu for 6400(9600) points.
This hand scores 4 han and 25 fu for 6400 (9600) points.


==External links==
==External links==
Hordes
1,486

edits

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