kovarex:
I changed this problem to status based and marked T2 as incorrect, as it is a ko, which is clearly worse than being unconditionally alive.

CosmicHawk:
When set up in the top left, A18 also leads to a ko : B18 B19 This ko when resolved lose only 1 point compared to the optimal solution when the ko is also resolved I believe it could still be considered correct since it lived through a ko and both ko have is at the opponent adv.

ogee:
2nd move, resisting seems wrong. Instead below sequence seems to create ko. I feel this is the best answer for both. B2-B3-C3-A2-A1-A3-C2-A2

Andrey:
nyoshi, if A2 - B2 B3 B1 dead, B1 A1 ko.

nyoshi:
why isn't A2 a good answer?