Like most of the UCT programs (I believe), Orego adds one tree node per Monte Carlo run. At present, this node includes data from the run that created it. Thus, after the first run, my tree looks like this:

ROOT: 1/1 wins
        CHILD A: 1/1 wins

Ignoring the other children, I eventually do another run through that child, getting this:

ROOT: 1/2 wins
        CHILD A: 1/2 wins
                GRANDCHILD B: 0/1 wins

My concern here is that that there have been two runs recorded in node A and only one in node B. Does this cause a problem for the UCT formula, which assumes that the number of runs through a node is the sum of the number of runs through the children?

Peter Drake
http://www.lclark.edu/~drake/



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