Beginner Exercise 88 / Solution

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.