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KanazawaSolutions

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KanazawaProblem70
KanazawaDiscussion70

 

KanazawaSolution70
Path: KanazawaSolutions   · Prev: KanazawaSolution69   · Next: KanazawaSolution71
   

Main line: Hashimoto Utaro
Variations: Bill Spight, Dieter

[Diagram]
Diag.: Main line

White plays on the leg side at the second line. White lives up to 7. If next Black a...


[Diagram]
Diag.: Damezumari

White can atari at 4 and Black can't connect at the marked stone, due to damezumari.



[Diagram]
Diag.: Failure 1

Bending in from the side without leg leads to ko. If Black wins the ko, he almost fills White's eyespace with a bulky five. The points a and b are miai for that purpose, and thus serve as a ko-threat for White:


[Diagram]
Diag.: White ko threat

White 1 is a ko threat. If Black 2 fills the ko, White 2 makes seki.



[Diagram]
Diag.: Failure 2

This is problematic:


[Diagram]
Diag.: Failure 2 - continuation

If Black plays a, White captures to make a living big eye. If not, White makes seki at a. Let's discuss at KanazawaDiscussion70.


[Diagram]
Diag.: Variation

[Diagram]
Diag.: Variation

White must win the ko to be able to approach at a.



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