# Gokyo Shumyo, Section 1, Problem 28 / Solution

Black lives

is maybe a little unexpected.

Main line

Up to , Black sacrifices his stones, to secure life for his group.

Continuation

White captures the stones in gote.

Variation at 6

in this diagram is followed by the atari at , and her stones are in shortage of liberties. This is better for Black than the main line.

Variation at 5

Changing the order of and gives the same result, but it doesn't invite White to make the small mistake at in the previous diagram.

Variation at 2

Black lives easily.

Variation at 1

Changing the order of and also seems to work.

Variation at 1 (part B)

If here, makes miai of a and b.

Variation at 1 (part C)

With as here, White cannot even capture a stone, because shortage of liberties at a prevents her from making the eye false.

Failure

Black 1 does not put enough pressure on the invading group, allowing white to capture the two stones on the left. black's remaining stones have only one big eye.

Applications:
The straight J group with an outside liberty resp.
JGroups#100
Problem 29
Back

Gokyo Shumyo, Section 1, Problem 28 / Solution last edited by Phelan on January 4, 2007 - 07:41