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XBoard -- an Xt/Athena user interface for GNU Chess
Original authors: Dan Sears and Chris Sears
Enhancements (Version 2.0): Tim Mann
XBoard borrows its colors, icon and piece bitmaps from XChess
which was written and is copyrighted by Wayne Christopher.
Copyright 1991 by Digital Equipment Corporation, Maynard, Massachusetts.
Enhancements Copyright 1992 Free Software Foundation, Inc.
The following terms apply to Digital Equipment Corporation's copyright
interest in XBoard:
------------------------------------------------------------------------
All Rights Reserved
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of Digital not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.
------------------------------------------------------------------------
The following terms apply to the enhanced version of XBoard distributed
by the Free Software Foundation:
------------------------------------------------------------------------
This file is part of XBOARD.
XBOARD is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY. No author or distributor accepts responsibility to anyone for
the consequences of using it or for whether it serves any particular
purpose or works at all, unless he says so in writing. Refer to the XBOARD
General Public License for full details.
Everyone is granted permission to copy, modify and redistribute XBOARD, but
only under the conditions described in the XBOARD General Public License. A
copy of this license is supposed to have been given to you along with
XBOARD so you can know your rights and responsibilities. It should be in a
file named COPYING. Among other things, the copyright notice and this
notice must be preserved on all copies.
------------------------------------------------------------------------
XBoard is an X11/R4-based user interface for GNU Chess. It uses the R4 Athena
widgets and Xt Intrinsics to provide an interactive referee for managing a
chess game between a user and a computer opponent or between two computers.
You can also use XBoard without a chess program to play through games in files
or to play through games manually (force mode); in this case, moves aren't
validated by XBoard. XBoard manages a digital chess clock for each player and
resets the clocks if the proper number of moves are played within the time
control period. A game can be started with the initial chess position, with a
series of moves from a game file or with a position from a position file. The
"match" shell script runs a series of games between two machines, alternating
sides. The man page xboard.man describes the features of XBoard.
XBoard was originally written by Dan Sears and Chris Sears. XBoard borrows its
colors, icons and piece bitmaps from XChess, which was written and copyrighted
by Wayne Christopher. We thank him for his work on XChess. Beginning with
version 2.0, Tim Mann has taken over development of XBoard.
Report bugs to Tim Mann <mann@src.dec.com>, with a carbon copy to Stuart
Cracraft <cracraft@rice-chex.ai.mit.edu>. If you improve XBoard, please send
your changes to Tim and Stuart.
CAVEATS
XBoard depends on the R4 Xt Intrinsics and R4 Athena Widget Set. In
particular, R3 just won't do---XBoard uses features introduced in R4. The
standard DEC and SUN releases won't do either. The Athena widgets are either
missing in the DEC standard distribution or in the wrong (R3) place in SUN
OpenWindows.
XBoard works best with version 4.0 of GNU Chess. (Older versions may also
work, but they are unsupported. The GNU Chess project requests that you get a
current copy of GNU Chess rather than using older, bug-ridden versions.) GNU
Chess must be compiled with the -DXBOARD flag for use with XBoard. Use the
"make gnuchessx" target in GNU Chess 4.0 to do this.
The Free Software Foundation would prefer to be able to distribute an X
chessboard program covered only by the GNU General Public License and
unencumbered by any other copyright. If you can help with this, please
contact the FSF.