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PlayKikashiBefore...
KanazawaProblem21

 

Kanazawa Solution 21
   

Authors:

Main line: HashimotoUtaro, 9p
Variations: BillSpight, DieterVerhofstadt 1k

[Diagram]
Diag.: Main line

White applies PlayKikashiBeforeLiving with 1, and then occupies the VitalPoint 3.



BillSpight: The point about kikashi is rather subtle. There is a, well, grosser reason for White to play the hane first. It is actually a kind of probe, getting Black to commit to the connection. If White plays the 2-1 first,

[Diagram]
Diag.: Wrong 1: Approach ko

Black makes an ApproachKo for the life of the group. Before winning the ko, Black has to connect the marked stones. a provides 3 local ko threats for White.
(Note: While Black's ko threats have to be huge to win the ko, Black can show a profit if the threat that White ignores is large by comparison with giving up the two marked stones.)



[Diagram]
Diag.: Wrong 2

Assuming White knows the concept of PlayKikashiBeforeLiving, she may still fail to see the VitalPoint. Black 4 makes miai of A and B.



[Diagram]
Diag.: Wrong 3

Here too, White misses the VitalPoint. Black 4 makes miai of A and B.



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This is a copy of the living page "Kanazawa Solution 21" at Sensei's Library.
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