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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 BulkyFive. The points 'a' and 'b' are miai for that purpose, and thus serve as a ko-threat for White:


[Diagram]
Diag.: White ko threat

W 1 is a ko threat. If B 2 fills the ko, W 2 makes seki.


[Diagram]
Diag.: Failure 2

This is problematic:


[Diagram]
Diag.: Failure 2 - continuation

If Black plays 'a', White captures a living nakade. 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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