Tsuuiisou, Chinroutou, and Ryuuiisou - Riichi Mahjong Guide

[@amphiapple7890]

Also, you can win tsuiisou with chiitoi for a yakuman (sometimes double) since there are 7 honors. More difficult but it exists.

[@poptacular6625]

In an old Mahjong game I have, there is also a variation called All Red (Hon itsu?). I never saw this as a Yakuman hand elsewhere in any other game, so maybe it's house rule. It's the same idea, except with the Red Dragon + the 1, 5, 7, 9 Sou. It's much harder to pull off though, because it ends up being a very specific SanAnKou/SuuAnKou.

[@LightGrunty]

I have heard of that. It's definitely a house rule.

[@7636kei]

re: ryuuiisou without the hatsu IDK, man, I ran into a mention in riichi.wiki that the value of ryuuiisou without the hatsu varies _wildly_ - anywhere from a mere five han hand (when it requires hatsu to count at all, is opened, and kuitan-nashi is in effect), single yakuman (usually on hatsu-agnostic ryuuiisou regulations, like... most standard regulations, really), up until double yakuman ("junsei ryuuiisou" regulations).

[@LightGrunty]

I just checked the page for ryuuiisou on riichi.wiki and it does not say any of that. Additionally, I would advise using caution when referring to riichi.wiki since it often features unsubstantiated or outdated information. Currently, all standard and commonly-used rule sets do not require hatsu for ryuuiisou, including JPML official rules which were updated within the past few years to no longer require hatsu despite what the riichi.wiki page says.