Ivan Detkov:
The "correct" solution here looks wrong. There is a continuation with efforts to escape and I do not see why these efforts are failing. I believe we need one more stone on the outside to make this problem working.

Djab:
It seems that there is a combination that works but is claimed "incorrect" : O3 O2 S2 S3 R2 M2 L2 L1 K1 Am I right ?

Djab:
it seems that there is a combinaison that works but is claimed "incorrect" : F17 F18 B18 B17 C18 H18 J18 J19 K19. Am I right ?

dsm:
first s2-s3-r2-t2 then o3-o2-m2 it's 4 liberties against 3, so why is it marked "incorrect"?