Gokyo Shumyo, Section 1, Problem 81 / Solution

Main line: Hashimoto Utaro
Variations: unkx80, Dieter

Solution

[Diagram]

Main line

This is what the book provides as the main line. W7 makes miai of a and b.

[Diagram]

Variation at 4

[Diagram]

Var at 4 (ctd): Seki

Black can only almost fill White's eyespace with bent four or twisted four. These are living shapes. The result is seki. Black a is sente.

[Diagram]

Variation at 2

The points marked a are miai. So are the points b and the points c.White is alive.


Failures

[Diagram]

Variation at 2: failure

If W3 to B2, the monkey jump to B4 destroys the eyeshape.

[Diagram]

Variation at 2: failure

Another wrong answer to B2. a and b are miai for the kill.

[Diagram]

failure

Ko.


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