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Taasog Erratum 1
    Keywords: Life & Death, Problem

Page 38-39 Diagrams 9 through 14

[Diagram]
Problem diagram: Black to kill

[Diagram]
Main variation

White is in shortage of liberties at a and b. Everything OK up until here.


[Diagram]
Second variation

The second variation, presented as "if White makes the diagonal attachment of W2", shows an extra stone BC . If BC is in place, B3 at a still works. When it is not in place, too. This is just awkward but not really inconsistent.


[Diagram]
Third variation

The third variation, White connecting at W2, requires a tesuji, namely B3, creating shortage of liberties. However, this is only necessary when BC is not in place. With BC in place, Black can play B3 at B5 immediately.


[Diagram]
Third variation: a question mark

White can't play at a: she is already in shortage of liberties!


[Diagram]
Third variation: cont.

The circled point is now empty. Now White can play at a.

So B5 is better at a, making ko. --BillSpight


[Diagram]
Third variation: cont.

Therefore, Black exchanges B3 for W4 and only then does he cut at B5. Now White is unable to play at a because of shortage of liberties.



Variation 2 being awkward, and the comments in variation 3 being inconsistent with the diagram, it is my opinion that BC should not be in place in diagrams 12, 13 and 14.

-- DieterVerhofstadt (1k)



This is a copy of the living page "Taasog Erratum 1" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.