Beginner Exercise 120 / Solution

Bulky five  

The solution of this problem comes when one realizes that the marked spaces actually form a bulky five.

Black can live  

After , black has two secure eyes. and are added only to clarify the situation.

white can kill  

After , this area is only one eye. The marked space can also never be more than a false eye, so black is dead.

No ko.  

Doesn't black have still a ko if he plays under white 1 ?

unkx80: No. After , black dies with a straight three and the marked point is still a false eye.

ko  

White should not capture with here, because she can kill without ko.

- Andre Engels