OD1P - Aug 11 Problem / Solution
HolIgor: The same tesuji could be found in the Ugly sagari. I called it "ugly sagari tesuji". It is a tesuji to consider each time you have two enemy stones cut off like this.
How can a failure diagram be in the solution? Unless of course ko is the solution JoeSeki
Black cannot resist by capturing at 5 instead of 3.