Ittsuu vs sanshoku: Difference between revisions
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[[Image:Ittsusanshoku1.png|right|thumb|250px|Hand state, where viability of [http://tenhou.net/0/?log=2018102617gm-0029-0000-682f0833&tw=2&ts=5 either yaku is available].]] | [[Image:Ittsusanshoku1.png|right|thumb|250px|Hand state, where viability of [http://tenhou.net/0/?log=2018102617gm-0029-0000-682f0833&tw=2&ts=5 either yaku is available].]] | ||
[[Image:Ittsusanshoku2.png|right|thumb|250px|A [https://mahjongsoul.game.yo-star.com/?paipu=190610-88da9112-5408-42a0-9e91-981865cbf401_a925632600 choice given] between two forms of sanshoku (123 or 234) and ittsuu.]] | [[Image:Ittsusanshoku2.png|right|thumb|250px|A [https://mahjongsoul.game.yo-star.com/?paipu=190610-88da9112-5408-42a0-9e91-981865cbf401_a925632600 choice given] between two forms of sanshoku (123 or 234) and ittsuu.]] | ||
[[Ittsuu]] and [[sanshoku doujun]] are similar but incompatible [[yaku]], because hand does not have enough [[mentsu|space]] for both yaku. When a hand has the potential to score one or the other, a player must choose which to aim for. | |||
== | ==Formation== | ||
Ittsuu and sanshoku require 3 specific sequences. They are both worth 2 han closed, and 1 han open. | |||
However, according to monthly data in [[Tenhou.net]], sanshoku is around twice as frequent as ittsu. This is due to a few reasons: | |||
*It is easier to make a 345 sequence than a 123 sequence. To make 345, a player can have {34, 35, 45} in hand. To make 123, a player can only have {12, 23} in hand. | |||
*Players prefer middle tiles over terminals for [[tile efficiency]] reasons. This means they are more likely to have a 34 or 45 [[ryanmen]] than a 12 [[penchan]] or 23 ryanmen. Thus, it is easier to "incedentially" form sanshoku than it is | |||
Also, sanshoku is compatible with [[tanyao]] and [[chanta]]/[[junchan]], while ittsu is compatible with [[honitsu]]/[[chinitsu]]. | |||
== External links == | == External links == | ||
[[Category:Yaku]] | [[Category:Yaku]] | ||
[[Category:Strategy]] | [[Category:Strategy]] | ||
Revision as of 06:48, 23 September 2024
Ittsuu and sanshoku doujun are similar but incompatible yaku, because hand does not have enough space for both yaku. When a hand has the potential to score one or the other, a player must choose which to aim for.
Formation
Ittsuu and sanshoku require 3 specific sequences. They are both worth 2 han closed, and 1 han open.
However, according to monthly data in Tenhou.net, sanshoku is around twice as frequent as ittsu. This is due to a few reasons:
- It is easier to make a 345 sequence than a 123 sequence. To make 345, a player can have {34, 35, 45} in hand. To make 123, a player can only have {12, 23} in hand.
- Players prefer middle tiles over terminals for tile efficiency reasons. This means they are more likely to have a 34 or 45 ryanmen than a 12 penchan or 23 ryanmen. Thus, it is easier to "incedentially" form sanshoku than it is
Also, sanshoku is compatible with tanyao and chanta/junchan, while ittsu is compatible with honitsu/chinitsu.