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Taasog Erratum 1
   

Page 38-39 Diagrams 9 through 14

[Diagram]
Problem diagram: Black to kill

[Diagram]
Main variation

White is in damezumari at a and b. Everything OK up until here.


[Diagram]
Second variation

The second variation, presented as "if White makes the diagonal attachment of 2", shows an extra black stone - the marked stone here. If that stone is in place, Black 3 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 2, requires a tesuji, namely Black 3, creating damezumari. However, this is only necessary when the marked stone is NOT in place. With the marked stone in place, Black can play 3 at 5 immediately.


[Diagram]
Third variation: a question mark

White can't play at a: she is already in damezumari!


[Diagram]
Third variation: cont.

The circled spot is now empty. Now White CAN play at a.

So Black 5 is better at a, making ko. --BillSpight


[Diagram]
Third variation: cont.

Therefore, Black exchanges 3 for 4 and only then does he cut at 5. Now White is unable to play at a because of damezumari.



Variation 2 being awkward, and the comments in variation 3 being inconsistent with the diagram, it is my opinion that the marked black stone 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) 2003 the Authors, published under the OpenContent License V1.0.