Dieter: happy to clinch one in this marvelous series.
char: Yup, is the move =)
This one is about notchers. If one knows that 212 nochers are dead, the answer is obvious.
The original problem is white to live, which can be found at Gokyo Shumyo, Section 1, Problem 25, and I found this die in gote move at it's solution page
unkx80: Dieter was one of the people who populated SL with a lot of material regarding notchers.
char: Nice. It's such an honor to have you here answering this problem, Dieter ^^.