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RE: [Bug-gnubg] RE:Why is odd ply equity always lower?

From: Ian Shaw
Subject: RE: [Bug-gnubg] RE:Why is odd ply equity always lower?
Date: Tue, 10 Jun 2003 13:11:52 +0100

-----Original Message-----
From: address@hidden
Sent: 10 June 2003 12:59
To: address@hidden
Subject: [Bug-gnubg] RE:Why is odd ply equity always lower? 

Previously I said:
I've looked at 1&3-ply evals for money play/matches cubeless and cubeful
and noticed the following.
If you start with either 0 ply or 2 ply as a basis (they're usually
pretty close) and then ask for a 1 or 3 ply eval the equity is ALWAYS
lower. (I couldn't find one higher)
It doesn't matter if it's positive or negative to start with.
Is that simply the way GNU's net behaves from training or is there more
to it?

Just to be clear it's checker play evals NOT Cube
Since this email upon further testing (1-ply only) I have managed to
find some that are higher at 1ply but they are very very few.


Since a 1-ply eval is just 21 0-ply evals, it appears that GnuBg is
consistently overvaluing the equity for the side on roll.

Joseph probably has the largest rollout database. Is this easy to check?


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