In its first game, Orego tried to play play g3, which is a superko
violation, crashing kgsGtp. This is a surprise (and of course, a big
disappointment) to me; I believed Orego was handling Superko correctly.
Here's what I think happened:
That move got a high heuristic weighting, probably be cause Orego had
gone into the new "coup de grace" mode that suggests playing near
enemy stones without too many liberties. The move was never actually
tried in the playouts. When it came time to choose a move, g3 happened
to have the most wins. I was checking for superko before adding
anything to the tree, but not verifying that the "best" move was
actually legal.
That's fixed now. Sorry about the inconvenience.
Peter Drake
http://www.lclark.edu/~drake/
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