Kyu Exercise 5 / Solution
Main line
The sequence of and is the key. Note that if Black captures the three white stones, the group will get a second eye and lives.
The rest is atari all the way.
Which ends in a shunt after . Ironically, the stone appears to be at a very beautiful position but does not help White at all.
Variations
If , Black lives simply by atari at and .
The jump at will only cause the entire chain to be captured.
Failures
The direct atari at does not work.
The sequence of and is wrong. After , Black is dead.
The smart aleck move at will only remove White's weakness.
See Kyu Exercise 5 / Attempts for more discussion.