Time and parameters are the same
Why is this situation? Rn4.14 grasp the superiority Rn4.20.4 give away the advantage
I think Rn4.14 made a bad choice and 4.20 picked not bad choice(stable choice).
Rn4.14 missed fact that 6 black stones cannot live despite of A10 move.
Rn4.20 knew that and she felt that Ko at the left-top corner is quite burdensome...
Because black group at the left-top corner are still not alive too.
And she judged that black still hold a lead this game after black give away 5 black stones at the left side.
If I just connect 4 black stones at the left side by putting D9, that's super-Ko.
Rn 10 times choices, 6 times A, 3 times B, 1 times C Rn selects C chances low
yeah, choice of A is stable because it removes Ko but it gives away 4 black stones.
choice of B and C is risky because black group at the left top corner aren't still alive but combative and favorable choice.
B is better than C because of Ko threat(劫材) and B9 move of white.
Merge pull request #116 from kobanium/ver-9.0
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crayzok commentedon Aug 22, 2017
I think Rn4.14 made a bad choice and 4.20 picked not bad choice(stable choice).
Rn4.14 missed fact that 6 black stones cannot live despite of A10 move.
Rn4.20 knew that and she felt that Ko at the left-top corner is quite burdensome...
Because black group at the left-top corner are still not alive too.
And she judged that black still hold a lead this game after black give away 5 black stones at the left side.
If I just connect 4 black stones at the left side by putting D9, that's super-Ko.
a22063821 commentedon Aug 22, 2017
C-point location will be better Rn
Rn 10 times choices, 6 times A, 3 times B, 1 times C
Rn selects C chances low
crayzok commentedon Aug 22, 2017
yeah, choice of A is stable because it removes Ko but it gives away 4 black stones.
choice of B and C is risky because black group at the left top corner aren't still alive but combative and favorable choice.
B is better than C because of Ko threat(劫材) and B9 move of white.
Merge pull request #116 from kobanium/ver-9.0