Shape problem 3

Black hits the shape point  

hits the shape point. Now a and b are miai for connection and the two white stones are in atari. White barely lives.

HolIgor. Note that I've seen this diagram in the Kobayashi Izumi book. At least, her face was on the cover. So, while this kind of move might be obvious, she considered it important enough. I reproduce it from memory and I am to be blamed for the mistakes.

Perhaps a better result?  

Perhaps this is a better result? White does not lose the two stones in a snapback, like in the previous diagram.

White first  

Solution

Black to play  

unkx80: With or without , the first move is the same all right. ;)

Good for Black  

Bill: Black can be satisfied with this result. (Assuming the ladder works.)

Not so good for Black.  

at .

Black attacks strongly with and , but is tesuji.

Not so good for Black (ii).  

at .

White's throwin, , makes a ko which White takes first.