# Gokyo Shumyo, Section 1, Problem 9 / Solution

White to live

prevents the capture of two stones and makes shape. She has to be careful in answering and .

Follow-up

White should play . When atari, captures, and captures...

Continuation

White can recapture at , and has two eyes at a and b.

Alternative follow-up

The tesuji at works too.

Continuation

After , it just transposes back to the previous solution.

Mistake in the follow-up

If instead of throwing in, White blocks at , starts a ko.

Wrong

on the 2-2 point doesn't give life. After the connection at , White still has only one eye in the corner. Black can also play atari with at .

Wrong (ii)

Connecting at is the third way to save the two stones. Black plays hane at and makes a placement at - and White is dead, because now a and b are miai. Black could also kill by playing on the vital point of this shape, namely .

White to live

ProtoDeuteric: Does this work?

unkx80: should play at for life, and should play at to kill with a bulky five.

go student: What about this. There should be at least a ko, as I can see. Please tell me if I miss something

atari at a or connect at below are clean kills

Gokyo Shumyo, Section 1, Problem 9 / Solution last edited by Slarty on June 25, 2013 - 04:57