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RE: [Bug-gnubg] Even, odd and half plies (WAS: New Contact Net Er ror Ra
From: |
Moore, Dave |
Subject: |
RE: [Bug-gnubg] Even, odd and half plies (WAS: New Contact Net Er ror Rates) |
Date: |
Tue, 25 Feb 2003 15:56:34 -0500 |
> >> (very naive)
> >> 2. Could positions that evaulate to different equity from
> different
> >> sides
> >> of the board be used as training data so that the Net
> would converge
> >> to an
> >> agreed upon answer when looking at things from either side
> of the board?
> >
> >
> > Not stupid at all. It seems the general agreement last time
> was that
> > this was
> > too dangerous, since there would be a risk that the net
> became better at
> > this kind of positions at the expense of other, more common
> types of
> > positions.
> >
> > I have, however, thought of an idea for overcoming
> differences between
> > odd and even plies:
> >
> > The basic idea is to introduce the half-ply: The average
> between 0 and 1
> > ply. or in general between n and (n-1) ply. This would decrease the
> > average square of the error for the kind of position -
> since the "true"
> > equity for the position is most likely to be somewhere
> between these two
> > evaluations.
> >
>
> I will check that. Obviously it is a little more expensive than 1ply,
> but the hope is to get a better result than 1ply. Personally I don't
> think it will work, but it is worth a check.
This sounds very interesting.
As another question/suggestion, when the even and odd plies disagree, could
this fact be used to give a "confidence metric" where gnubg can let the user
know that it may/may not understand the position very well?
Thanks,
Dave
- RE: [Bug-gnubg] Even, odd and half plies (WAS: New Contact Net Er ror Rates),
Moore, Dave <=