[computer-go] Example for Morphys law in Evaluation
Chrilly
c.donninger at wavenet.at
Wed Sep 20 13:04:47 PDT 2006
I have in Suzie the following seemingly logical rules:
Rule 1: If a group is evaluated dead, look if there is an adjacent dead
opponent group which is even weaker ("more dead"). If yes, the group is not
dead, but just weak.
Rule 2: If a groups is evaluated weak, look for a weaker adjacent opponent
group. If yes, the group is not weak but okay.
The Rules are done in 2 passes, because after pass one the influence of the
"really dead" groups is flipped and this can change the result for rule 2.
Enclosed is a simple example were these 2 rules produce in a very simple
positionl nonsense. According to rule 1 the dead black group is upgraded to
weak, because the white group on q2 is more dead (black to move is assumed).
In pass 2 the weak black group finds again a weaker neighbour group, q2 and
its therefore updated to okay.
In this simple example one can fix the problem relative easy. But the
interaction of groups is in my experience the real problem.
Chrilly
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