Gokyo Shumyo, Section 1, Problem 71 / Solution

Main line  

After , White a is answered by b. This is an example of oi-otoshi.

Variation at 2  

makes miai of a and b for life.

Variation (ii) at 2  

Giving away both 1-2 points seldom represents the main line. Black easily makes two eyes at the circled points.

Blocking  

is a wasted move. In comparison to the main line, he falls one move short in answer to White's clamp at .

Bending inward  

fails: leaves a and b as miai to kill.

Expanding  

expands the eyespace and again White answers at to take away one eye. Next Black plays at what seems to be the vital point, but White has a nice answer up her sleeve. makes miai of making a straight three at a and a false eye at b.