Beginner Exercise 173 / Solution

Solution 1  

makes two eyes at the bottom, because Black cannot play at a.

Solution 2  

This solution works too. After , if Black a, then White b; if Black b, then White c as in Beginner Exercise 172.

togo: This connects the two white stones, but is one big ko threat more for Black.

Failure

Failure  

invites the atari at . White can only live by fighting the ko with .

Failure  

here will only result in a false eye after the throw-in at .