OD1P - July 28 Problem / Solution2

Sub-page of OD1PJuly28Problem
[Diagram]

Black first, White dies

We shall start off from B1 instead...

The solution is presented below.

Discussions welcome.

--unkx80

[Diagram]

Tesuji

BillSpight: B3 is tesuji, but W4 makes a and b miai for a second eye. This is a diagram in the Sekiyama book to show that B1 is a mistake.

However, it looks like the vulgar play works.


Solution!!!

[Diagram]

That very interesting tesuji!

[Diagram]

Variation 1 (a)

If B7 is played at B9 instead, then White takes the stone at B7 and it becomes a ko. (B7 at W10 produces another ko; I've added it as "Variation 1 (c)" below. Dieter)

[Diagram]

Variation 1 (b)

After the placement at B1, a and b are miai. White is dead.

[Diagram]

Variation 1*: Ko (added by Dieter)

If W6 as marked, then B7 at a. It is a ko.

[Diagram]

Variation 2 (a)

[Diagram]

Variation 2 (b)

(B3 at WC)

With B3, White dies with a farmer's hat eye shape.

[Diagram]

Variation 3

This variation reverts to Variation 1.

[Diagram]

Finally

Finally, White's resistance at W2 is useless. B3 descends, and a and b are now miai.

--unkx80


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