Re: [Bug-gnubg] How to enable hypergammon

[Russ Allbery]

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/>