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KanazawaProblem70
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Kanazawa Solution 70
Path: KanazawaSolutions   · Prev: KanazawaSolution69   · Next: KanazawaSolution71
    Keywords: Problem

Main line: Hashimoto Utaro
Variations: Bill Spight, Dieter

[Diagram]
Main line

White plays on the leg? side, on the second line. White lives up to W7. If next Black a...


[Diagram]
Shortage of liberties

White can play atari at W4 and Black can't connect at WC (oshitsubushi).



[Diagram]
Failure 1

Bending in from the side without the 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]
White'slocal ko threat

W1 is a ko threat. If B2 fills the ko, W2 makes seki.



[Diagram]
Failure 2

This is problematic:


[Diagram]
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 this at Kanazawa discussion 70.


[Diagram]
Variation

[Diagram]
Variation

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



Go to Problem 71
Back to Kanazawa Tesuji Series



Path: KanazawaSolutions   · Prev: KanazawaSolution69   · Next: KanazawaSolution71
This is a copy of the living page "Kanazawa Solution 70" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.