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MAKEBEAROFF(6)              DragonFly Games Manual              MAKEBEAROFF(6)

NAME
       makebearoff - generate a GNU Backgammon bearoff database

SYNOPSIS
       makebearoff [-HCcgnvh] -f filename [-t PxC] [-o P] [-s cache-size] [-O
       filename]

DESCRIPTION
       makebearoff generates GNU Backgammon bearoff databases, which are used
       to improve play in the endgame.  It can generate either two-sided
       (exact) databases that tell precisely the chance of winning or one-
       sided (approximate) databases that provide a variety of probabilities
       looking at each side independently.

       Bearoff databases can get quite large and can take a significant amount
       of time to generate for large numbers of chequers and/or points.

OPTIONS
       -f filename, --outfile filename
              Write the bearoff database to filename.  This option must be
              given.

       -t PxC, --two-sided PxC
              Generate a two-sided bearoff database for P points and C
              chequers for each player.  Be warned that the size of the
              database grows rapidly with larger numbers of points and
              chequers.

       -o P, --one-sided P
              Generate a one-sided bearoff database for P points.  One-sided
              bearoff databases are always generated for up to fifteen
              chequers.

       -s N, --xhash-size N
              Use a memory cache of size N while building the database.  If
              the cache is smaller than the database size, database generation
              will be slower due to disk writes.

       -O filename, --old-bearoff filename
              Reuse an already generated bearoff database.  Any needed data
              already in this database will just be copied without
              regenerating it.

       -H, --no-header
              Do not write the normal bearoff database header.

       -C, --no-cubeful
              Do not calculate cubeful equities for two-sided databases.

       -c, --no-compress
              Do not compress one-sided databases.

       -g, --no-gammons
              Do not include gammon distributions in one-sided databases.

       -n, --normal-dist
              Rather than storing exact probabilities, approximate
              probabilities in a one-sided database with a normal
              distribution.

       -v, --version
              Show version information and exit.

       -h, --help
              Display usage and exit.

EXAMPLES
       To generate a two-sided database for up to eight chequers on six
       points:

           makebearoff -t 6x8 -f gnubg_ts.bd

       Note that this database is 72MB in size.  To generate a one-sided
       database for up to fifteen chequers on ten points:

           makebearoff -o 10 -f gnubg_os.bd

       Note that this database is 118MB in size.

SEE ALSO
       gnubg(6), bearoffdump(6)

AUTHORS
       Joseph Heled, Oystein Johansen, Jorn Thyssen, and Gary Wong, with the
       assistance of many others <bug-gnubg@gnu.org>.

       This manual page was written by Russ Allbery <rra@debian.org>, for the
       Debian GNU/Linux system (but may be used by others).  It may be
       redistributed and/or modified under the terms of version 2 of the GNU
       General Public License as published by the Free Software Foundation
       (the same license as GNU Backgammon).

                                  2006-01-15                    MAKEBEAROFF(6)