Sadaharu: Added the refutations to D1. @Ivan Detkov I appreciate the discussion but it would be great if you let me add the variations to my own problems.
Ivan Detkov: I am sorry. I will certainly try to avoid it in future.
TwT: May please Master Ivan Detkov or Master Sadaharu have a look?
Ivan Detkov: It is complex. D19B19A18D18E19B18A17 looks alive even if barely. Another answer to E19 ends in ko. Let's check these variants and if I am right, it is good to add as a refutation.
I am sorry. I will certainly try to avoid it in future.