From: mann@pa.dec.com (Tim Mann) Newsgroups: gnu.chess,rec.games.chess.computer,rec.answers,news.answers Subject: FAQ -- GNU Chess and XBoard Frequently Asked Questions Followup-To: gnu.chess Reply-To: bug-gnu-chess@prep.ai.mit.edu Approved: news-answers-request@MIT.EDU Summary: Answers to frequently asked questions in the gnu.chess newsgroup, covering the chess-playing program GNU Chess, the chess interfaces XBoard, WinBoard, and AmyBoard, and other chess topics. Archive-name: games/chess/gnu-faq Version: $Id: FAQ.html,v 1.50 1995/12/12 08:09:57 mann Exp $ Posting-frequency: monthly
gnu.chess and info-gnu-chess are not for general chess or computer chess discussion. You won't be flamed if you post such messages here, but you will find more information in other places. See topic [A.3] below.
PLEASE DO NOT try to start or play chess games by posting messages to gnu.chess. Instead, read the rec.games.chess FAQ to learn about the IECG, the IECC, and other groups that you can join to find opponents, and send one or more of them email to join.
The newsgroup and mailing list used to be gatewayed bidirectionally; that is, any article posted on the newsgroup would be automatically forwarded to the mailing list, and any mail sent to the list would be automatically forwarded to the newsgroup. Recently the person who maintained this gateway (and similar ones for other gnu.* groups) has had to quit, and no replacement has been found at this writing. In the interim I think it is best to use the newsgroup and not the mailing list.
If you want to be added to or deleted from the mailing list, mail to info-gnu-chess-request@prep.ai.mit.edu (not to the list or newsgroup itself).
For general news and information about chess, try the newsgroup hierarchy rec.games.chess.*, especially the groups rec.games.chess.misc and rec.games.chess.computer. Both of the latter groups have very informative FAQs maintained by Steve Pribut; look for them on the newsgroups or at http://www.clark.net/pub/pribut/chess.html.
Like other GNU software, you can get GNU Chess and XBoard by anonymous FTP from ftp://prep.ai.mit.edu/pub/gnu/ and its many mirror sites. Look for files matching the patterns gnuchess-*.gz and xboard-*.gz. The .gz suffix indicates the files were compressed with gzip. You can get gzip from prep.ai.mit.edu also. The GNU FTP sites carry Unix-compatible versions of GNU software only, so you won't find WinBoard or AmyBoard there.
For other chess software, try the Internet Chess Library. Use anonymous FTP to connect to caissa.onenet.net, or go to the Web page http://caissa.onenet.net/chess/. You can get chess software, game collections, the FAQ file for rec.games.chess, and other chess-related material there, in the directory pub/chess. Sometimes new XBoard versions arrive on this site before they make it to prep. The FTP server can automatically decompress files for you as you download them, useful if you don't have gzip. Note that caissa.onenet.net is no longer the same machine as ics.onenet.net!
You can get WinBoard from the Internet Chess Library, in directory pub/chess/Win3.
Here is a sample anonymous ftp session. Some of the ftp server's responses are abbreviated, but all the commands you must type are included.
% ftp prep.ai.mit.edu Connected to prep.ai.mit.edu Name: anonymous Password: your-email-address@your-site ftp> binary 200 Type set to I. ftp> cd /pub/gnu 250 CWD command successful. ftp> dir gnuchess-*.gz -rw-r--r-- 1 14910 wheel 1448657 Feb 21 22:17 gnuchess-4.0.pl74.tar.gz ftp> get gnuchess-4.0.pl74.tar.gz 150 BINARY connection for gnuchess-4.0.pl74.tar.gz (1448657 bytes). 226 Transfer complete. ftp> dir xboard-*.gz -rw-r--r-- 1 14910 wheel 312553 Aug 07 20:53 xboard-3.3.pl2.tar.gz ftp> get xboard-3.3.pl2.tar.gz 150 BINARY connection for xboard-3.3.pl2.tar.gz (312553 bytes). 226 Transfer complete. ftp> quit
If you are using Unix, run the "script" program, do whatever is necessary to reproduce the problem, type "exit" to the shell, and mail us the resulting typescript file. We also need to know what hardware/operating system combination you are using. The command "uname -a" will usually tell you this; include its output in your typescript.
If you are using MS Windows or the Amiga, you may have to write down all the messages with pencil and paper and type them into your mail message. Or you may be able to use cut-and-paste in your console window. Either way, please transcribe the messsages carefully. They may seem meaningless to you, but they are meaningful to us and essential for diagnosing problems.
You should be able to contact all the members of the project by sending mail to bug-gnu-chess@prep.ai.mit.edu. If you don't trust this list, you can send mail about XBoard, WinBoard, or the FAQ to mann@pa.dec.com (Tim Mann); mail about AmyBoard to DarkSide@darkness.gun.de (Carsten Meyer); mail about cmail to R.E.Welsh@quadstone.co.uk (Evan Welsh). Comments that are of interest to all users of the software should be posted to the gnu.chess newsgroup.
GNU Chess is a communal chess program. Contributors donate their time and effort in order to make it a stronger, better, sleeker program. Contributions take many forms: interfaces to high-resolution displays, opening book treatises, speedups of the underlying algorithms, additions of extra heuristics. These contributions are then distributed to the large user-base so that all may enjoy the fruits of our labor.
GNU Chess is intended to run under Unix or Unix-compatible systems. It is written in C and should be portable to other systems.
For a test drive, try WebChess, a World Wide Web interface to GNU Chess provided by DJ Delorie. The URL is http://www.delorie.com/game-room/chess/.
The ratings that are commonly given for computer chess players are less meaningful than they may seem. Most computer chess players (including GNU Chess) do not play in tournaments against humans, or do so only rarely, so they do not have official ratings from FIDE, USCF, or other chess organizations.
Some people have methods for rating chess programs approximately by giving them a set of problems to work on and seeing how they do, or by having them play tournaments against each other. Any rating number produced by a formula like this should be taken with a grain of salt; it may be only a rough approximation to the rating the program would achieve in over-the-board tournament competition against humans. The chess skills required for solving problems or playing against other computers are not necessarily the same as those required for play against humans. Also, of course, tournaments among computers can rate the computers only relative to one another, not relative to humans. Some of the computers need to be rated by other means to give the ratings a basis to start from.
Compared with human players, computer players are strong tactically but weak strategically, and are much better at blitz chess than at slow chess. These differences make it more difficult to assign a meaningful rating too.
Several computers do play regularly on the Internet chess servers and have achieved ratings there. These ratings have the advantage of being based on many games. On the other hand, ICS ratings are only roughly comparable to USCF or FIDE ratings. Many players have ICS ratings that are hundreds of points higher or lower than their USCF or FIDE ratings.
Finally, unlike dedicated chess machines, or PC chess programs that run on only a few different models of Intel processors, GNU Chess runs on many different kinds of CPU at many different speeds. Thus its strength depends on how fast a machine you run it on and how much optimization your C compiler does. Some people have formulas for estimating how a computer player's rating varies on faster or slower machines---see the rec.games.chess FAQ for more information---but these need to be taken with a grain of salt too.
All that said, here are some numbers.
- On the Internet Chess Club, a copy of GNU Chess running on an SGI Onyx R4400 under the handle MaxII has achieved a blitz rating of over 2500 and a standard rating of over 2300.
- Wolfgang Gabriel ran the Bednorz-Toennissen Test BT2630 with GNU Chess 4.0 pl74 on a 60 MHz Pentium with 16 MB of RAM. The test gave an estimated rating of 2213. He also ran Fritz-2 on the same hardware and got an estimated rating of 2311.
Several other ports of GNU Chess to the PC are available in the Internet Chess Library (topic [A.3]), scattered among the directories /pub/chess/DOS, /pub/chess/DOS/OLD-STUFF, and /pub/chess/Win3. Here is some information on them, but check the library itself for more up-to-date information.
Porting GNU software to PCs is not a major focus of the GNU project, and these ports are not supported by the FSF. Contact the people who did the ports if you have questions or problems.
MSDOS:
gnu40-62.exe 1323260 Probably GNU Chess 4.0.pl62 for MSDOS
gnu40dos.exe T 317072 GNU Chess 4.0pl60 by Free Software Fndtn.
- compiled for DOS, executables only
gnu40src.exe 307786 GNU Chess 4.0pl60 by Free Software Fndtn.
- sources only
gnuchs31.exe T 270559 GNU Chess 3.1 by Free Software Foundation
- compiled for DOS, sources and executables
gnuchs40.exe T 355494 GNU Chess 4.0pl60 by Free Software Fndtn.
- compiled for 80386er, executables only
Windows:
chess321.exe W M 238185 GNU Chess 3.21 ported by Daryl K. Baker
OS/2:
gpl65os2.zip 677824 gnuchess-4.0.pl65 compiled for os2.
gc-os2-m.zip 578032 gnuchess 4.0 for os2 with mouse support.
gnu40os2.zip 1303602 Executables for running gnuchess 4.0 pl62
- under OS/2.
pmchs.exe W M 92004 OS/2 PM Chess 1.01 (GNU Chess 3.1 Windows by
- Daryl K. Baker) port to OS/2 by Kent Cedola
pmchssrc.exe 110279 OS/2 PM Chess 1.01 (GNU Chess 3.1 Windows by
- Daryl K. Baker) sources only
The AmyBoard port (probably the best) is discussed in topic [D.3].
UChess and AmigaGnuChess are available in the Internet Chess Library (topic [A.3]), in the directory /pub/chess/Amiga. UChess is the newer of the two.
-r--r--r-- 1 chess chess 204025 Mar 31 1993 AmigaGnuChess.lha -r--r--r-- 1 chess chess 10122 Mar 31 1993 AmigaGnuChess.readme -r--r--r-- 1 chess chess 705327 May 7 10:28 UChess283.lha -r--r--r-- 1 chess chess 21478 May 7 10:26 UChess283.readme -r--r--r-- 1 chess chess 199387 May 7 10:27 UChess283Patch.lha -r--r--r-- 1 chess chess 21589 May 7 10:26 UChess283Patch.readme
GnuChessMac40b5.hqx - executable binary
GCMsource40b5.hqx - source
As with the PC ports, the Macintosh port is not supported by the Free Software
Foundation. If you have questions or problems, contact Dan Oetting,
oetting@gldfs.cr.usgs.gov.
If you have the old Mac port of GNU Chess 3.0, be sure to get 4.0 instead. GNU Chess has come a long way since version 3.0!
Directory CENA10:[ANONYMOUS.VMS] GNUCHESS.ZIP;1 307 21-MAR-1994 18:42:05.13It's only a character cell version for VT100, VT200, etc. terminals. Thanks to Patrick Moreau for this information.
To unpack the gnuchess distribution, gnuchess-*.tar.gz, put it into a new, empty directory, cd there, and give this Unix command:
gzip -cd gnuchess-*.tar.gz | tar -xvf -
If this command fails because you don't have gzip, see topic [A.3], and ask a
local Unix expert if you need more help.
The above command will unpack all the files into a new directory. Next, cd into this new directory.
*** Patchlevel 74 and earlier ***
You will find some instructions in a file named INSTALL. You will also need
to read and edit the Makefile in the src subdirectory before you build; it may
contain information missing from the INSTALL file.
You must run all three of the following commands to fully build GNU Chess:
make
make gnuchess.data
make install
The first make command compiles the GNU Chess programs. (You can edit the
"all:" line in the Makefile if you don't want to build all the programs.
gnuchessr must always be built. gnuchessx is required if you will be using
XBoard. The others are optional.) The "make gnuchess.data" command builds
the book. The "make install" command copies the results to the BINDIR and
LIBDIR you specified so that the different pieces can find each other.
*** Patchlevel 75 and later ***
Decide what directory tree you are going to install GNU Chess in. The default
is /usr/local. If you have write access to this directory tree, make sure
that it contains subdirectories bin, lib, and man. (If you must "su" to get
write access to /usr/local, you don't need to do so until just before the
"make install" below.) Type the following:
configure
make
make install
If you are going to install GNU Chess under your home directory for personal
use, do this instead:
mkdir $HOME/bin $HOME/lib $HOME/man
configure --prefix=$HOME
make
make install
If you have problems or special requirements, see the files README, INSTALL,
Makefile.in, and configure.in for more information.You don't need to have gcc to build GNU Chess. However, GNU Chess is written in ANSI C. If you have only an old K&R C compiler, be sure you have the current patchlevel of GNU Chess, and get "unproto" by:
Wietse Venema
wietse@wzv.win.tue.nl
Mathematics and Computing Science
Eindhoven University of Technology
The Netherlands
It was released in comp.sources.misc Vol 27 with patches in vol 28 and vol 38. Among other places, it can be found on unix.hensa.ac.uk in pub/uunet/usenet/comp.sources.misc/volume27/unproto.
Compile it and copy the cpp it produces into the gnuchess src directory before you type "make" there.
If you see this problem as soon as GNU Chess starts up, most likely GNU Chess is exiting with an error message. If you see the message "NO LANGFILE", it means that you did not install GNU Chess correctly, and it is unable to find the file gnuchess.lang. Make sure that you defined LIBDIR in the gnuchess Makefile, and that gnuchess.lang is in that directory. If gnuchess.lang is not there, you probably didn't type "make install" in the gnuchess src directory; you must do this to install gnuchess.lang (and the gnuchess book). If you defined LIBDIR to something that is not an absolute pathname (that is, to something that does not start with a "/"), GNU Chess will work only if you run it from the GNU Chess "src" directory where you built it.
If the problem happens while GNU Chess is running, you may have hit a GNU Chess bug. There was a bug in 4.0 pl72 that would corrupt the stack and cause the program to exit, sometimes with a nonsensical message first, sometimes with no message. It was especially evident on Linux. There is some evidence that this bug is not yet fixed but just happens less often. If you can help gather evidence to track this problem down, please let us know. A test case that can be reproduced would be especially welcome.
a) Perhaps the feature in GNU Chess that lets you stop it thinking on your time by just entering your move is not working. This feature relies on the FIONREAD ioctl, which seems to be broken on some versions of Unix. XBoard uses this feature if the flag -DATTENTION is not present on the DEFINES line of the XBoard Makefile. XBoard 3.1 and later are distributed with this flag already set, so you should not have a problem unless you have removed it.
b) You might have built your GNU Chess with the wrong -D options. With some versions of GNU Chess, this can cause GNU Chess and XBoard to disagree about what units time is measured in, causing GNU Chess to think for 100 times as long as it should. Look at your GNU Chess Makefile and check that the line of options marked "normal", not the line marked "gnufour ICS client", is uncommented, something like this:
# gnufour ICS client
#
#OPT= -DUSEINT -DCACHE -DCLIENT -DGDX -DHASGETTIMEOFDAY -DNULLMOVE \
-DQUIETBACKGROUND -DBAREBONES -DWAY4PL64 -DHISTORY -DAGING
# normal
OPT= -DUSEINT -DCACHE -DGDX -DHASGETTIMEOFDAY -DNULLMOVE \
-DQUIETBACKGROUND -DSEMIQUIETBOOKGEN -DWAY4PL64 -DHISTORY \
-DHASHSTATS -DAGING
c) You might have a persistent transposition table (hashfile) that has been corrupted. Look in the LIBDIR directory you defined in the GNU Chess Makefile, and if you find a file named gnuchess.hash there, remove it. Do not use the hashfile if you are running multiple copies of GNU Chess at the same time (for instance, with Two Machines mode in XBoard). In fact, it is probably best not to use the hashfile under any circumstances.
b) Another possibility is that you have a persistent transposition table (hashfile) that has been corrupted. Look in the LIBDIR directory you defined in the GNU Chess Makefile, and if you find a file named gnuchess.hash there, remove it. Do not use the hashfile if you are running multiple copies of GNU Chess at the same time (for instance, with Two Machines mode in XBoard). In fact, it is probably best not to use the hashfile under any circumstances.
FIONREAD: Operation not supported on socket
You probably have a non-ANSI ioctl.h; see README. -1 45 4004787f
If you are using gcc to compile, the solution to this error message is usually to go to the GNU Chess Makefile, find the line that starts "CFLAGS=" (with no # character in front of it), and append the flag "-traditional-cpp" to the end of the line. Then do
rm dspcom*.o gnuan.o
make
make install
to rebuild gnuchess.
If you aren't using gcc, we don't really understand why this should happen, but we do have a brute-force workaround: You can simply disable the gnuchess feature that uses FIONREAD. Find all the places in dspcom.c (and gnuan.c) where the line "#ifdef FIONREAD" occurs. Change each of them to "#ifdef NOTDEF". Then recompile gnuchess.
With this code disabled, if you tell gnuchess to think on your time ("hard" mode), you will have to type ^C to make it stop thinking when you want to make your move. The current version of XBoard does this automatically, so disabling the code has no effect on XBoard.
1) Add -DSYSV to the CFLAGS= line in the Makefile. (To the CFLAGS line that doesn't start with a # sign, that is.) Then do "rm nondsp.o; make".
2) If (1) doesn't work, leaving you with a similar error, but citing setvbuf instead of setlinebuf, try the following. Remove the -DSYSV again, go into nondsp.c, and edit the line of code where setlinebuf is called to read "setbuf(stdout, NULL);" instead.
This problem will be fixed in GNU Chess 4.0.pl76.
Why does GNU Chess use so much memory? The extra memory lets it keep large hash tables that speed up its search and make it play better, and a large on-line book that improves opening play. If you have lots of memory you may want to reconfigure GNU Chess to use *more* than the default amount.
As an interface to GNU Chess, XBoard lets you play a game against the machine, set up arbitrary positions, force variations, or watch a game between two machines.
As an interface to the Internet Chess Servers, XBoard lets you play against other ICS users, observe games they are playing, or review games that have recently finished. You don't need GNU Chess for this.
To play email correspondence chess with XBoard, you use it with the cmail program. See topic [D.6] below.
You can also use XBoard as a chessboard to play through games. It will read and write game files and allow you to play through variations manually. You can use it to browse games off the net, or to review GNU Chess, ICS, and email correspondence games you have saved. It saves games in PGN (portable game notation), and can read almost any game in algebraic notation. These features are available at all times, even if you do not have access to GNU Chess or an ICS.
XBoard runs under Unix or Unix-compatible systems. It requires the X Window System, version X11R4 or later. There are also ports of XBoard to Microsoft Win32 (that is, Windows NT or Windows 95) and to the Amiga. See topics [D.2] and [D.3] respectively.
The WinBoard distribution now includes a port of GNU Chess itself to Win32. The GNU Chess port is distributed in executable form, with instructions for rebuilding it from the standard GNU Chess sources (available separately). You should have at least 16 to 24 MB of memory to run GNU Chess with WinBoard.
cmail (topic [D.6]) has not been ported to Win32. All the other XBoard functions are included in WinBoard.
System requirements:
If you would like to use an ICS, you need an Internet connection via either
AmyBoard is available in the Internet Chess Library (topic [A.3]).
To unpack and build the xboard distribution, xboard-*.tar.gz, give these Unix commands:
gzip -cd xboard-*.tar.gz | tar -xvf -
cd xboard-*/
configure
make
If the first step above fails because you don't have gzip, see topic [A.3], and ask a local Unix expert if you need more help. If you have any problems with the last two steps, read the READ_ME and INSTALL files in the xboard-*/ directory. You will also find this FAQ there.
You don't need to have gcc to build XBoard, and your C compiler doesn't have to be ANSI-compliant.
Instructions on how to get started with Internet chess are included with the XBoard distribution. The network addresses included in the XBoard distribution may not always be current. The oldest ICS is the Internet Chess Club at chess.lm.com, which now has a fee for registered use, but still allows free unregistered use. There are also many newer sites with no fees, using the Free Internet Chess Server implementation (FICS). Current FICS sites include ics.onenet.net (the most active), krypton.daimi.aau.dk, dds.hacktic.nl, holly.csv.warwick.ac.uk, and chess.pitt.edu. On all these machines, the port number to use is 5000. Try "finger chess@ics.onenet.net" for more address information.
Note: If you don't have network connectivity to any ICS site, you can run your own server using the FICS code. You can get a copy by anonymous ftp from the Internet Chess Library (topic [A.3]). The code is changing rapidly, so send mail to chess@ics.onenet.net and/or log into the FICS server at ics.onenet.net and ask the administrators there for current information.
The cmail program included with XBoard lets you play email postal games with another human; see topic [D.6].
Two humans can play chess on the same machine using one copy of XBoard in Edit Game mode, but the clocks don't run in this mode, so it's of limited usefulness.
See also topic [F.2], Winsock Chess.
WinBoard runs well on both Windows 95 and Windows NT.
- Add the following line to the file .mime.types in your home directory. (Create the file if it doesn't exist already.)
application/x-chess-pgn pgn
- Add the following line to the file .mailcap in your home directory. (Create the file if it doesn't exist already.)
application/x-chess-pgn; xboard -ncp -lgf %s
- Exit from your Web browser and restart it.
2) On MS Windows systems:
The exact procedure depends on which Web browser you are using. Generally, you need to select something like Helper Applications or File Types from an Options menu or dialog, click the button that make a new type, and fill in the boxes:
Extension: pgn
Mime type: application/x-chess-pgn
Application command line: WinBoard -ncp
You will probably have to give a full pathname for WinBoard; you will probably
be able to use a Browse button in the configuration dialog to look for it.
If your Web browser doesn't let you include arguments on the application command line, you'll need to put a file named WinBoard.ini in the working directory where the browser starts up WinBoard, containing the string -ncp. Without the -ncp, WinBoard will try to start up GNU Chess whenever you use it as a viewer. This will work if you have GNU Chess installed, and you might even prefer it if you want to have GNU Chess available to analyze the games you view.
3) To confirm that your external viewer configuration is working, open one of the following URLs and click on any of the game names shown.
Games at www.traveller.com don't cause XBoard to be started when you are using Netscape, but they do work with NCSA Mosaic. This seems to be due to a missing feature in Netscape, but unfortunately it will probably have to be fixed on the server end, given Netscape's status as the de facto standard.
For the Explorer on Windows 95, follow the same procedure as in topic [D.10]. You only have to follow the procedure once to configure both Microsoft's Internet Explorer and the file system Explorer.
For general information on getting missing X sources, see the FAQ on comp.windows.x. Note that you may be missing only the header files, or you may be missing the libraries themselves too.
HP-UX users are missing only the header files. You can get them by anonymous FTP as follows. (But first check with your system administrator to see if someone else at your site has already done this.) Get the archive files /hpux9/X11R5/Core/imake-5.04.tar.gz (imake and xmkmf, optional but useful) and /hpux9/X11R5/Core/Xaw-5.00.tar.gz (Xaw header files) via anonymous FTP from the site hpux.csc.liv.ac.uk (138.253.42.172), or one of the other official sites---Germany: hpux.ask.uni-karlsruhe.de (129.13.200.57), US: hpux.cae.wisc.edu (144.92.4.15), France: hpux.cict.fr (192.70.79.53) or Netherlands: hpux.ced.tudelft.nl (130.161.140.100). Unpack the archives using gzip and follow the instructions in their README and HPUX.Install files. Thanks to Richard Lloyd for this information.
If you have the Xaw header files installed in a different place than the other X11 headers, you may need to configure XBoard with an extra flag to help it find them. For example, if yours are in /foo/bar/X11/Xaw, try this:
rm config.cache
(setenv CFLAGS -I/foo/bar ; configure)
Also see topic [E.3].
configure --x-includes=/odd/place/include \
--x-libraries=/odd/place/lib
The directory named in the argument to --x-includes must have a subdirectory "X11" that contains the actual .h files.
Some linkers have bugs that cause bogus error messages when you try to link X programs. The configure script includes a workaround for a bug of this kind that exists in some SunOS 4.x.x installations. See the FAQ on comp.windows.x for more information about problems of this kind.
If you have X11R6, the configure script for XBoard 3.2.pl2 and earlier may not find all the link libraries you need. This bug is fixed in XBoard 3.3.
If all else fails, check whether anyone else at your site has been able to compile any X programs on your system. Your X installation might be buggy. If so, the system administrator at your site might know how to fix or work around the problem.
Also see topic [E.2].
Some people want to connect to ICS through HyperTerminal or some other terminal program first, then run WinBoard. This is not how it works. WinBoard wants to talk directly with your modem, acting as a terminal program itself. Start out with the modem "on hook" (not making a call).
Run WinBoard with a command line like this (adding more options if desired):
start WinBoard /ics /icscomm com1
Use com2, com3, or com4 in place of com1 if your modem is connected to one of
those ports. Leave out the "start" if this is the command line in an icon
you are making for WinBoard.
After you start WinBoard, you may need to change some of the options in the Communications dialog (on the Options menu). The dialog has the usual options for talking to modems: bits per second, bits per byte, parity, number of stop bits. If you have to change anything in this dialog, you'll have to change it every time you run WinBoard; there is currently no way to save these options or specify them on the command line. Sorry.
Next, type dialing commands to your modem in the text window that WinBoard creates. You may need to turn off Local Line Editing on the Options menu while you are typing commands to your modem. Turn it back on when you're done. See the WinBoard Help file for instructions if you see your typing echoed an extra time after you hit Enter.
Trumpet Winsock 2.1 (and earlier) supports only 16-bit applications, and hence does not work with WinBoard. But there is a beta-test release available that does support 32-bit applications. I have not tried it with WinBoard, but it should work. See Trumpet's Web page http://www.trumpet.com.au/wsk/winsock.htm for more information.
If you want to start WinBoard from a Program Manager icon or a Windows 95 shortcut, you can give it command-line options by going to the Properties dialog for the icon or shortcut and adding them to the end of the Command Line or Target field.
XChess has only one significant feature that is not present in XBoard: Two humans can play chess using XChess on different machines, without using the Internet Chess Server as an intermediary. This feature is of interest only if you don't have network connectivity to the Internet Chess Server.
Note: There actually have been several different programs called "XChess" in circulation at various times. The above describes one that was associated with GNU Chess.
Crafty 8.23 works to some extent with XBoard and WinBoard 3.4.pl1, but some features don't function properly. Future versions of Crafty will work better. Versions earlier than 8.23 may or may not work at all. Known problems are listed below. Please don't report these problems to us.
configure --disable-attention
Run XBoard or WinBoard with the following flags to use Crafty as the first and/or second chess program. (The second chess program plays White in Two Machines mode.) You can add more Crafty command line flags inside the quotes; see Crafty's documentation to find out what they are. The ics option puts Crafty into XBoard compatibility mode.
-fcp "crafty ics"
-scp "crafty ics"
You can find the latest version of Crafty on Bob Hyatt's FTP server, ftp://willis.cis.uab.edu/pub/hyatt/. If you have trouble connecting to this server with your Web browser, run the ftp program and connect to it by hand.