Black first to live
is the key. White has no choice but to connect at . Then, gets the second eye because of the cutting point at a.
Objectively, should just play elsewhere, but here we show what happens if White tries to kill.
White can't destroy the eye
With the sequence up to , Black captures White's group.
alive
So, White must connect and Black then ensures life.
Sub-pages (up)Attempts
Referenced byBeginnerExercise88