TherapieGo:
up

TherapieGo:
I've just checked with the AI to be really sure and there's no refutation to my move C18 after G18 because even if you answer H18 I continue to block in J18 and you're dead!

TherapieGo:
2 things to say: Firstly, I think we need to add the ko branch just after we've solved the problem to make it clear to everyone that the problem is objectively ko. You've already done this very well for a lot of other problems, so why not for this one? Secondly, after the sequence S1, P1, R1, T1, R1, N2, I'm pretty sure you can play R2 too and it works?

caranthir:
Added a minor variation.

Lucirex :
After s1 w hast to Play ko on R1. If w replies with P1 then b Just connects on R1 and w is dead unconditionally. If w tries n2 just m2 n1 o2 o3 m1 and if w takes on o1 b plays R2 and w is dead because of Liberty shortage

Amarok:
S1 R1 : ko

jhubert:
It seems to me that you can take 4 stones and it is simpler in some sequences

Ccrochet:
Then white needs to see the R2 tesuji

Ccrochet:
This problem does not look 10k to me if black resists: S1-P1-R1-T1 (capture)-R1- attach N2 ?

navy:
The reward for this problem is 400 XP. I assume there is a typo here? :)