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BeginnerExercise147

 

Beginner Exercise 147 Solution
    Keywords: Problem

Solution

jvt: This problem looks similar to the 3x2 eye-space, but is the vital point the same?

[Diagram]
3x2 eye-space


Lucky: Uh, the vital point is not the same.

[Diagram]

First the basic shape. Black 1 is the answer, after 3 white cannot play 'a'.


[Diagram]

Black 1 is a mistake, the position becomes ko.


[Diagram]

In the problem if black starts with 1 white lives.


[Diagram]

This 1 kills by bent four in the corner. If white plays 4 at 5 then black plays 4 himself.


[Diagram]

This 4 doesn't change anything. Black 11 is at 7 and white is dead.


[Diagram]

jvt: There is no way white can live in seki either. After B5 a and b are miai.



Solution to originally-posted version

[Diagram]
Is this five bulky or what?

(For any other white response, just play B3 at W2.)



[Diagram]
Alternative

Charles This B1 also works. Note that B3 at W4 allows a ko. And that the result after B5 is not seki.



This is a copy of the living page "Beginner Exercise 147 Solution" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.