After reading the relevant code, I realized that val_scale=1.0 should do
precisely what I wanted. I have tested it a bit, and so far so good.


On Tue, Nov 17, 2015 at 7:12 AM, Petr Baudis <> wrote:

>   Hi!
> On Tue, Nov 17, 2015 at 07:05:34AM -0500, Álvaro Begué wrote:
> > If anyone knows of a program that can actually use something like
> expected
> > score in the UCT move selection formula, that's probably what I need. I
> > might end up modifying Pachi to do this, but it sounds daunting.
>   That's already implemented - see the options described in uct/uct.c
> under the heading "Node value result scaling".
>   This even is one of the things that happens when you enable
> maximize_score, but the score takes just (at most) 0.01 of the value,
> where 0.99 is depending on win/loss.  You might try to see what happens
> if, in addition to maximize_score, you also pass
>         val_scale=0.1
> (instead of the default 0.01) or even larger value.  Not sure what
> effect on strength it might have.
>                                 Petr Baudis
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