White can live. Black can kill.
Black first
is killing: prevents the connection, but then is atari.
White first
White must play a or b to live, At a is better, by 3 points, than b.
White first at b
Kaiou: wow, my first page :)
unkx80: Excellent, you are right! =)
There is a small trap in this problem. Definitely the ko created by and below is not the solution.
Wrong
Referenced byBeginnerExercise123