On April 6, David Fotland wrote:
In Many Faces' playouts I don't keep arrays of liberties. I just
keep the counts. In the older program I keep linked lists of
liberties.
On April 7 he elaborated:
Yes, I walk both chains looking for duplicates. This is quite fast
if done efficiently, since group merging is rare enough. I found
keeping the liberty arrays to be slower since they are big, so there
is more copy overhead in the UCT tree, and they are not cache
friendly.
Two questions:
1) Do you maintain the counts even in MC playouts?
2) What do you do if you add a single stone to a chain? Do you walk
the enlarged chain counting liberties (and checking for duplicates
within the temporary liberty list), create a new one-stone chain and
then perform merging, or something else?
Thanks,
Peter Drake
http://www.lclark.edu/~drake/
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