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OneDay1Problem
July28Problem
July28Solution1

 

July 28 Solution 2
   

[Diagram]
Diag.: Black first white die

We shall start off from 1 instead...

The solution is presented below. :-)

Discussions welcome.

--unkx80


[Diagram]
Diag.: Tesuji

BillSpight: B 3 is tesuji, but W 4 makes a and b miai for a second eye. This is a diagram in the Sekiyama book to show that B 1 is a mistake.

However, it looks like the zokusuji (vulgar play) works.



Solution!!!

[Diagram]
Diag.: That very interesting tesuji!

[Diagram]
Diag.: Variation 1 (a)

If black 7 is played at 9 instead, then white takes the stone at 7 and it becomes a ko. (7 at 10 produces another ko; I've added it as "variation 1 (c)" below. Erase or embed as you feel --Dieter)


[Diagram]
Diag.: Variation 1 (b)

After the placement at 1, a and b are miai. White is dead.


[Diagram]
Diag.: Variation 1*: Ko (added by Dieter)

If 6 at marked, then 7 at A. It is a ko.


[Diagram]
Diag.: Variation 2 (a)

[Diagram]
Diag.: Variation 2 (b)

(Black 3 at marked stone)

With black 3, white dies of a farmer's hat nakade.


[Diagram]
Diag.: Variation 3

This variation reverts to variation 1.


[Diagram]
Diag.: Finally

Finally, white's resistance at 2 is useless. Black 3 sagaris, and a and b are now miai.

--unkx80



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