Beginner Exercise 220 / Solution

Solution.  

ataris three Black stones and is the tesuji for the kill. After , the eye becomes false.

Failure.  

is wrong, makes the eye at the right side.

Failure.  

There is no need to play "extra" moves like . After , is sente, but Black lives with .

Failure (cont.)  

If prevents a second eye here, lives by capturing .

Note that neither nor can be at , because of the shortage of liberties.