Source:
Problem diagram.
Black plays.
Mr. Yang's solution seems to have an incorrect move order. What do you think?
Analysis:
Myron Souris
Solution follows
(or click here to download SGF)
A pro mistake?
The throw-in of Black 1 is Mr. Yang's intended solution for reaching a ko.
With Black 3, Mr. Yang's analysis stops and gives the result as a ko.
But is this conclusion correct? The next diagram seems to say no.
See the SGF for many more variations than in the diagrams here.
Follow up diagram
But doesn't White 4 kill Black outright?
Perhaps Mr. Yang missed this move?
With 6, White can simply ignore the ko.
After White 8, Black cannot keep White from connecting out.
Black dies having only one eye.
Correct move order?
Mr. Yang doesn't mention Black 1, which appears to be the only move for Black to reach a ko.
Now the throw-in at Black 5 works.
With Black 7, White can no longer kill by connecting out, due to a shortage of liberties.
However, White is happy to take the ko 1st with 8.
Is this diagram the best play for both sides?
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