Tsumego From Games 31 / Analysis

First thought  

After , it seems that Black should aim at and to get something here.

If Black hopes that this makes miai of a and b to cut, there ought to be some shortage of liberties on White's part, if Black is to get any advantage.

As things stand:

First thought  

it looks rather as if here kills Black.

Moves 200 to 203  

The whole board from the game. Black slid one line farther.

Continuation  

Charles White has to worry here about semedori, not just preventing Black making two eyes. Cutting with and is therefore tempting, because it makes White independently alive in the corner. But now Black at a becomes a serious threat.