Beginner Exercise 28 / Solution

Sub-page of BeginnerExercise28
[Diagram]

Ko for life - Black captures first

The sequence from W1 to B4 yields a ko for life. Black cannot connect without removing the white stones because of shortage of liberties.

Note that the order of W1 and W3 can be interchanged.

[Diagram]

Black fears ko - and dies for it

To avoid the ko is impossible - here, White falsifies an eye so Black is left a cyclops.

[Diagram]

Resistance, variation - 5 at 3

Again avoiding the ko yields only death for Black.



[Diagram]

Failure 1

The throw-in here doesn't work - the marked point will become a real eye for the corner group, so the two disconnected black groups will have one real eye each and a shared eye - and thus live.

[Diagram]

Failure 2

A similar result occurs if White approaches from the side.

[Diagram]

Black almost lives =)


[Diagram]

Black Lives

W3 is a mistake

[Diagram]

Black Dies

force black to dissolve eyes

[Diagram]

Black Dies

If black doesn't play at 2, white can ko and kill the left side of black block

[Diagram]

Black lives

unkx80: The mistake in the earlier diagram is B4. Instead of a, B4 here lives.



This is a copy of the living page "Beginner Exercise 28 / Solution" at Sensei's Library.
(OC) 2007 the Authors, published under the OpenContent License V1.0.
[Welcome to Sensei's Library!]
StartingPoints
ReferenceSection
About