We try it out at /Attempts.
The solution is copied over from /Attempts, with minor corrections.
Main line: Hashimoto Utaro
Variations: unkx80, Dieter
The tesuji is White 1.
White 11 at a and Black 12 can't play at b because White captures three in a row, assuring a second eye.
This lives. Covered in Beginner Exercise 56 and Beginner Exercise 58.
The next tesuji is White 3, sacrificing yet another stone.
If White fires off the usual sequence first only to play the former tesuji at 7, she falls short as a is now suicide.