Kyu Exercise 45 / Solution

Table of contents
Problem I

Black first

White first

Problem II

White first
Table of diagrams
White dies.
White lives.
Comment.
Failure - ko.
Failure - death.
Failure - death.
White's strongest resistance.
White dies.
White dies.
Comment.
Failure - ko.

Problem I

turns the potential eye at the top side into a false one. White can only make at most one eye at the center, so White dies.

The descent at is key. It makes capturing at and making the second eye at miai, so White lives.

Mikesh: Is there a reason why B plays instead of directly ?

Starting with the atari with lives as well, but White makes an unneccessary sacrifice.

Making an atari at is a failure. White's only saving grace is to live with a ko at and .

makes only one eye on the upper side.

is interesting. However, kills unconditionally. Note that is sente. If at , then at .

is White's strongest resistance.

is tesuji, White dies.

If , connects and finished the job.

Having the exchange at and does not help White at all.

Black saves two stones at , but at a price of allowing White to get a ko for life.

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Kyu Exercise 45 / Solution last edited by 95.116.18.215 on October 22, 2009 - 19:52