Quoting Mark Boon <[EMAIL PROTECTED]>:
OK, things start to fall in place for me. I was wondering all this time what would happen with the information of the simulations that happen before expansion. So the answer is: nothing. But at least the result of the playout gets percolated up the tree, so I suppose you get the most important bit of information of the playout in your tree anyway. I have also been wondering before what was meant when I read that CrazyStone uses ownership information in the patterns (if I remember that correctly). I was always wondering how you got ownership information before doing playouts. So it turns out these come from simulations done before expansion. Somehow I had disregarded that idea because I was under the assumption it would discard too much information. But I suppose keeping the playout results in the tree is valuable enough by itself. And like you say, you win back a lot by not having to do at least a playout for every single move at every level in the tree.
Valkyria also collects ownership information just as you describe it. Unfortunately I have never been able to detect any major effect of using this information. But I make very pretty pictures made out of the ownership info which makes the userinterface for Valkyria more pleasant to watch. It also helps debugging becasue I can see right away when the life and death of a group is misevaluated, which is hotherwise obscured by win rates for different positions.
My first monte carlo programs used ownership info very effectively, but it can be that by using AMAF this information is used already.
-Magnus _______________________________________________ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
