LeatherScrollProblem57/Solution

Solution:Ko 1  

Black takes first and has an internal ko threat at a.

Solution:Ko 2  

Though Black takes first as above, the cutting point at a disappears after White capture at b. Note that Black b is not a local ko threat; White resolves the ko by connecting at c.

Solution:Ko 3  

Still inferior defense: White takes first. ( at a is met by at b)

Failure  

The Comb Formation is alive.