Gokyo Shumyo, Section 4, Problem 11 / Attempts
Karl Knechtel: The tesuji from Problem 8 doesn't work here:
Setting up a double approach at the 1-2 point isn't enough either.
I think the sagari works, though.
Any stronger resistance for White that I should consider?
There are a few variations, of course... but nothing seems to take away Black's eye, which steals the liberty at .
unkx80: Actually this problem appears in many problem books. Practically every book that contains this problem will have a discussion on this variation.
Then just take away a liberty, and White is in double damezumari. (We can't extend to a because White then sets up a snapback.)