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Counting problem 5 / Discussion
Sub-page of CountingProblem5
Dieter's analysis: White has the follow-up of 1 and 3. Black can either play ko (but it's a flower-viewing ko for White), or defend as in the next diagrams.
Later Black will have to answer a at b.
This is the result if Black plays first: no big follow-ups, just the small endgame at a and b. Dieter: Now I will try to count this position, assuming the ko is too large for Black to bear. I am bred with deiri counting and I'd much appreciate Bill and others providing the miai counting analysis.
Let's take this as the expected territory for both players. We count 9 points for Black.
Compared to the neutral position, White has made three points. Black has six points. White has gained 6 points over the neutral position..
Here, Black gains 7,5 points (one for the circled point, half a point for the ko at b).
If White 1 is sente, its value is 7,5 x 2 = 15.
I understand the flaw of estimating the value here.
Bill: White 1 - 6 is sente. Later Black has to make a protective play, say at a. Counting the marked points, the local score is +1.
The question then becomes how to count this position. (Three white stones have been captured at the marked points.) This is a copy of the living page "Counting problem 5 / Discussion" at Sensei's Library. ![]() |