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Suji
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KanazawaSolution33
OneTwoPointTsumego2

 

Belly Attachment
   

[Diagram]
Diag.: Corner problem

White to play and capture the two black stones that cut off the two white stones.


[Diagram]
Diag.: Belly attachment tesuji

The belly attachment does the trick


[Diagram]
Diag.: Continuation 1

After the continuation to 7, White has 4 liberties and Black 3[1].


[Diagram]
Diag.: Continuation 2

If Black fills outside liberties first, he loses the semeai too.


[Diagram]
Diag.: Zokusuji

White 1 is ZokuSuji: the crude move which doesn't work. The best result she can get now is ko.


[Diagram]
Diag.: Zokusuji cont 1

White protects at 3 and loses time in the semeai. Her stones are captured.


[Diagram]
Diag.: Zokusuji cont 2

Persevere with 3 makes it ko. The ko is very disadvantegeous for White. There is no need to make it ko if you can win unconditionally.



[1] (It is a Type 1 fight: the side with more external liberties is the favourite; the favourite kills the underdog - Richard Hunter's theory on CountingLiberties).



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