Gokyo Shumyo, Section 1, Problem 14 / Solution

Main line  

Black starts by pushing out at . Escaping to the center is considered success, so White blocks at .

The whole thing is a set-up to get the hane of in place, before playing the connection of . After , the vital point, Black has two eyes.

Variation 1 : mistake at 7  

The awkward move in this sequence is . Suppose Black captures at instead. After , he needs three moves to remove it, and White can create shortage of liberties at .

Variation 2: Omitting the push and hane  

If Black omits the push and hane ( and in the main line), and plays at , White plays hane at . keeps Black to one eye. Even if Black captures the white stones and , he will only get a False Eye.

Variation 3: Omitting the push  

Starting with the hane at in variation 3 works as well, but can defend at a instead of d. Compare this with the sequence Black a, White b, , and Black loses the possibility of cutting at c.

Variation 4: Different way to live  

Also works