Gokyo Shumyo, Section 1, Problem 58 / Solution

Solution

[Diagram]

Main line

White enlarges her eye space with W1, then makes eye shape with W3. Incidentally, W1 and B2 makes a notcher with code 411WN.

If White descends at a instead of move W3, then White is also alive. However this way is less good for White, as Black can profit by capturing two stones. See problem 28 in this series for details.

[Diagram]

Continuation - variation 1

[Diagram]

Continuation - variation 2

W2 at a also works.


Failures

[Diagram]

Failure at 3

The solid connection at W3 fails. Black a to d all kill. (This shape is coded 312NS notcher.)

[Diagram]

Failure at 3 (punished)

For example, B1 strikes at the vital point. After B5, a and b are miai.

[Diagram]

Failure at 3 (punished)

If White enlarges her eyespace, there are many ways to kill. For example, B3 and B5 leads to some nakade shape.

[Diagram]

Failure at 3 (wrong punishment)

hane from the left fail to kill. W8 secures seki.


Next


This is a copy of the living page "Gokyo Shumyo, Section 1, Problem 58 / Solution" at Sensei's Library.
(OC) 2024 the Authors, published under the OpenContent License V1.0.
[Welcome to Sensei's Library!]
StartingPoints
ReferenceSection
About