Beginner Exercise 152 / Solution

Solution  

is the vital point to live. After this, white has a few choices.

Variation 1  

If white tries , black plays this way, and ends with a live shape.

Variation 2  

If white tries this , black needs to be a little bit careful. Black can capture three stones because of oiotoshi.

Mistake by black  

In response to , this ends in disaster:

Failure  

It seems to work, until one sees the under the stones tesuji.

Failure  

If here, then kills. Black cannot play at a due to shortage of liberties.