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Re: [Bug-gnubg] gnubg / Databases

From: Joern Thyssen
Subject: Re: [Bug-gnubg] gnubg / Databases
Date: Sun, 29 Feb 2004 13:18:16 +0000
User-agent: Mutt/

On Sat, Feb 28, 2004 at 05:19:12PM -0800, Jim Curtis wrote
>      I'm writing to both praise again the wonderful program you guys have
> so brilliantly built and to ask you for some advice.  Regarding the
> databases available at:
>  ftp://ftp.demon.nl/pub/games/gnubg/databases
> I would like your recommendation on which databases to download, if any.  I
> also am unclear if, say, one downloads the 6x10 ts bd or the os 11 do these
> bd's include the data from the 6x9 ts or 6x8 ts bd's and os 10 bd or is
> there separate data in each of the files?  

You'd only have to download 6x10 as it includes equities for all
positions which 10 or less chequers on any of the 6 lower points, hence
it includes all of the 6xY databases for Y <=9.

I'd download the largest two-sided database, but skip the one-sided ones
for two reasons: (1) the race neural net is quite good, (2) the bearoff
one-sided database is slower than the race net. However, if you wish to
study effective pip counts (EPCs) the one-sided bearoff databases has
their merit.


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