LeatherScrollProblem79/Attempts

 

I'm posting this here in 'Attempts' because I don't think it works:

 

Since there is no way for black to make two eyes inside the white group or win the semeai, I'm sure black can't kill in this position. I don't think there's a way to make seki either, so this can't be the winning line. --gnostic?

 

1 2 3 still looks good, 4 is necessary.

 

5 and 6 look logical

 

w 7 b 8 looks interesting.

 

But it looks like the best black can get from this is a really tough ko:

 

I'm not sure what kind of working line black has here, so I will note the similarity to LeatherScrollProblem74 and come back to this later. --gnostic?