StephaneLamy: something buggy here: I play C13C12A14B14B12, the app freezes, I play C14 for the opponent (!!), then A13B11E19A12D19A14A13C19 and it says "correct", I feel I tricked the website!
It's not the only problem where the app freezes and let me play for the opponent, something to be fixed...
d4rkm4tter: This was actually not a bug, but you found a correct move that wasn't in the file. I only added B12 and the app finds back to a correct path that continues with C14.
I think there is a mistake, after C7 C8 A6 B6 B8, if White plays A7 there would be a ko