If I am not wrong, this is actually a famous classical problem.
Solution.
The key move is .
Solution (6 at 1).
The hane at is also a tesuji which allows Black to live in sente.
Failure.
If blocks on the outside, then kills. If Black a, then White b results in a double snapback.
Sub-pages (up)Attempts
Referenced byRTGProblem29