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Re: My two set of slides
Posted by: Quentin
Date: October 8, 2011 08:29PM
Discard reading slides are quite interesting, especially the analysis around the red 5.
However, I have a remark about the 1-4-7 rule.
You say if 4 is discarded, then 1 is very safe as it can only be a shanpon or a tanki.
But if 4 is the last inner discard, then 7 is not so safe. There is a significant probability the player had 468 in his Hand and had to discard either 4 or 8 to get tenpai. Thus a last inner 4 indicates a possible kanchan tenpai on 7.
But a kanchan disables pinfu and, unless you have another yaku for your closed Hand, you have to Reach immediately if you do not want to miss any opportunity to Ron one of your opponents. Maybe you did raise this concern during the seminar. I really miss I was not able to attend it.