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Re: [Bug-gnubg] How to enable hypergammon

From: Russ Allbery
Subject: Re: [Bug-gnubg] How to enable hypergammon
Date: Sun, 31 Mar 2013 11:05:32 -0700
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.4 (gnu/linux)

Michael Petch <address@hidden> writes:

> As for Hypergammon, the databases are called hyper1.bd, hyper2.bd,
> hyper3.bd . It seems that under Debian (Including Ubuntu) the
> maintainers have set the database directory to be /var/lib/gnubg

> If you copy the files there and rerun gnubg it should work.

There are some instructions in /usr/share/doc/gnubg/README.Debian about
the bearoff databases in general:

| gnubg needs a pre-computed two-sided bearoff database for maximum
| strength.  Since this database takes some time to build, particularly on
| slow systems, and takes over 6MB of disk space, the default is not to
| build it.  If you weren't asked whether you wanted to build the bearoff
| database at installation time, or if you've changed your mind, run:
|     dpkg-reconfigure gnubg
| to be asked again.  (The one-sided bearoff database is much smaller and is
| therefore included in the gnubg-data package.)
| The Debian version of gnubg has been modified to search in /var/lib/gnubg
| as well as /usr/share/gnubg for its data files.  This is where the
| automatically built bearoff databases are put.  If you want particularly
| strong play and don't mind the disk space and computation time, you can
| build even larger databases with:
|     makebearoff -t 6x8 -f /var/lib/gnubg/gnubg_ts.bd
|     makebearoff -o 10 -f /var/lib/gnubg/gnubg_os.bd
| These two databases combined will take 190MB of disk space and may take
| several hours to compute.  Alternately, you can download prebuilt bearoff
| database from <ftp://ftp.demon.nl/pub/games/gnubg/databases/>.  Save
| two-sided databases as gnubg_ts.bd and one-sided databases as gnubg_os.bd
| in /var/lib/gnubg.
| If you want gnubg to use pre-built hypergammon databases, save them in the
| same /var/lib/gnubg directory as hyperN.bd where N is the number of
| chequers.  See the man page for makehyper for more details.

You can always just generate the hypergammon databases directly with
makehyper, although of course downloading them is fine too.

Russ Allbery (address@hidden)             <http://www.eyrie.org/~eagle/>

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