Tsuno has recently added a new, optional, rule for Tenhou CHAMPIONSHIPS, 'shuugi', which I'm sure a lot of 'PUROS' will jeer at. Shuugi rewards players for luck. Basically, for every ippatsu, aka dora and ura dora you get a bonus point. You get points for tsumo, ron and for getting yakuman hands too. As far as I understand, each of these bonus points can range from 2000-10000 depending on the Championship rules. I have a feeling I'm way off on that last sentence though.
In more recent news, Tsuno also posted a list of optional rules he's thinking of adding to championship mode, this includes open riichi, yakitori, flower tiles, option to start with 2 dora indicators, wareme and Washizu Mahjong.
Edit: Apparently Tsuno was thinking of adding Aotenjou too but due to 32bit, it's nearly impossible to have numbers that high. He said something about 'buu mahjong' too
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