RTG Problem 24 / Attempts

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[Diagram]

White to play.


Bill: I think best play depends upon the ko threat situation and the rest of the board. But, since the kos are so big, I am going to assume that neither player has a ko threat, and also that the temperature of the board is not too high, so that there will be no ko exchange.

[Diagram]

White makes ko.

W5 takes ko. Later, B2 - W a is sente.

White makes ko with W1. If W3 instead, Black can respond with B7 and kill.

With no ko threats, Black has to protect with B4 and B6. W7 escapes.


[Diagram]

White escapes directly?

Grauniad: Doesn't this allow White to escape without a ko? If B2 at 3, W3 at a kills 4 Black stones and lives.



Bill: The descent dies.

[Diagram]

Death in the descent

B6 at BC (nakade).



This is a copy of the living page "RTG Problem 24 / Attempts" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.
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