TwT: ^^ Since the Lord is busy in other kingdoms and to cry for a code solution would be in vain. Practically, to avoid double editing: to write "work in progress" as an answer to the comment could help. And edit that comment after "save". (sigh) guile, I miss you. I already took all the blame by virtual admin seppuku.
posetcay: @guile: Haha yeah, I am always afraid of accidental simultaneous editing. I seem to have saved after you, so no progress was lost on my part, no worries :) (and sorry if you lost any progress)
guile: Naaaaaaah, in case of doubt : always blame TwT !
posetcay: Considering that 4 moves work after R19-R18, I consider R18 to be a weak resistance. After searching for a better alternative, I found R19-S19 to be much trickier and revamped the solution tree accordingly. I left the C19-C18 as an alternative for now, but it is redundant in my opinion and the tsumego would be cleaner without it.
guile: holy crap, both of us editing at the same time.... T T sorry Man ...
TwT: I agree with Jérôme. That one needs some tidy up.
posetcay: It is actually working properly, I just disabled "correct controlled by status" while fixing some things earlier, but alive/dead thing stayed. Green/red spots are correct, but alive/dead text should be ignored.
Hrewsahgs: Sorry, I should've been more specific. It's not about the local position specifically, but about how the attacking side gets to become komaster/komonster with a double ko threat, despite the defending side being able to avoid such a scenario. Is that not a valid enough reason?
Yeah but why would you play it over T2? It is an unnatural move and this is not a beginner's collection, so I am not tempted to add it.