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KanazawaProblemNine

 

Kanazawa Solution Nine
Path: KanazawaSolutions   · Prev: KanazawaSolutionEight   · Next: KanazawaSolution10
   

[Diagram]
Diag.: White to live

White 1 prevents the capture of two stones and makes shape. She has to be careful in answering Black 2 and 4.


[Diagram]
Diag.: Follow up

The throw in at 1 is tesuji. White can't block at A with 5 because of damezumari, but captures at 1 instead.

JamesA: Is it necessary to throw in? can white just play at 3 straight away?

unkx80: Both will lead to the same result. =)


[Diagram]
Diag.: Continuation

After Black capture of two stones with 2, White can recapture at 3, and has two eyes at A and B.



[Diagram]
Diag.: Mistake in the follow up

If instead of throwing in, White blocks at 1, Black 2 starts a ko.



[Diagram]
Diag.: Wrong

White 1 on the 2-2 point doesn't give life. After the connection at 6, White still has only one eye in the corner. Black can also play atari with 2 at 4.


[Diagram]
Diag.: Wrong (ii)

Connecting at 1 is the third way to save the two stones. Black makes a hane at 2 and a placement at 4 and White is dead, because now A and B are miai. Black could also kill playing 2 on the vital point of this shape, being 3.



Problem 10
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