addition to being on the menus. (2) Large font for clock. (3) Pop-up
dialogs for errors.
+2.1, patchlevel 11 -- Sat Jun 5 00:01:01 PDT 1993 -- mann@src.dec.com
+
+* Added code to deal with "wild" games on ICS. This includes allowing
+castling with the king on d1 or d8, which is allowed in wild(1) games
+if the king started there. Notation is o-o to castle "short"---to
+whichever side the king is closer to---and o-o-o to castle "long."
+Right now wild castling is always allowed by xboard; we rely on ICS or
+gnuchess to reject it when we aren't really in wild mode.
+
+* memcpy call had arguments in wrong order.
+
+* Removed April Fool code
+
+2.1, patchlevel 10 -- Mon Feb 15 10:19:31 PST 1993 -- mann@src.dec.com
+
+* Avoid trying to select on a pipe when using System V. Needed to
+copy some code from InitChessProgram() up into establish().
+
+* Bug fix in disambiguating pawn moves like "ed".
+
+* Fix to error handling in ReceiveFromProgram.
+
+* Bug fix: entering EditPosition mode with black to play highlighted
+White's clock instead of Black's.
+
+* Added telnetProgram resource in case "telnet" is not the name of the
+telnet program.
+
+2.1, patchlevel 9 -- Fri Jan 22 19:08:27 PST 1993 -- mann@src.dec.com
+
+* Entering Force Moves mode clears "flag has fallen" messages from display.
+
+* ICS host name can now be in numeric format; for example 128.2.232.4.
+
+* Bug fix: LegalityTest was failing to test whether a pawn move was
+illegal because the move would discover a check.
+
+* Handle ICS message "mann asserts a win over manntest, who disconnected."
+
+* Bug fix: A recent change to PromotionCallBack had broken
+underpromotion to a knight.
+
+* Bug fix: In EditPosition mode, dragging a piece onto a square border
+would make it vanish. xboard wasn't distinguishing this case from
+dragging the piece off the board. Thanks to Matthew Kidd.
+
+* Removed "static" declaration from yywrap for compatibility with IRIX
+version of lex. Thanks to stiller@blaze.cs.jhu.edu.
+
+* Added substitutes for bzero, bcopy, and gethostname for Solaris
+SVR4. Thanks to Michael Grant.
+
+* Bug fixes to queen move disambiguation. Bugs showed up only when
+promotion resulted in more than one queen on the board.
+
+2.1, patchlevel 8 -- Fri Dec 11 17:54:18 PST 1992 -- mann@src.dec.com
+
+* parser bug fix: It now really works to leave off the piece a pawn is
+promoting to and let it default to queen.
+
+* When starting to observe or play an ICS game, don't draw board in
+initial position and then immediately redraw it in the current
+position.
+
+* Handle ICS messages when an "abuser" forfeits a game by
+disconnecting and when a game is aborted ("removed") by an
+administrator.
+
+* Bug fix: A user move when in LoadGame+Pause mode was resuming the
+game load instead of putting us in force mode.
+
+* It seems that crashes inside sscanf when xboard is compiled with gcc
+(as on IBM PS/2 AIX, mentioned below, and also on VAX Ultrix 3.1) are
+caused by an incompatibility between gcc and the sscanf implementation
+on these platforms. A workaround is to specify -fwritable-strings to
+gcc (see the gcc documentation). Added info on how to do this to the
+Imakefile. Thanks to Tom McConnell for this information.
+
+* Clocks are allowed to go negative. This is mostly for ICS
+compatibility, but it affects gnuchess mode too. Also, we give the
+time bonus when a player hits the time control boundary even if his
+flag is already down. This choice is a bit debatable, but it makes
+things look better when you are in TwoMachines mode and gnuchess's
+time management screws up causing it to exceed its time limit.
+
+* Implemented move legality checking code. Moves made with the mouse
+or parsed from a file are checked for legality before being made.
+This is mostly in preparation for future extensions, such as
+human-human play. For now it makes -noChessProgram mode more useful.
+
+* If the user takes back moves, we restore the clocks to the earlier
+settings.
+
+* We now handle the output of the ICS oldmoves command, including
+parsing the game end condition.
+
+* Added autoCallFlag mode.
+
+* Fixed glitches in the medium size outline king and rook bitmaps, and
+touched up the medium size solid king and outline queen.
+
+* bug fix: DisplayMove would not display backwardMostMove - 1.
+
+* Added CallFlag button and removed AcceptMatch. CallFlag is more
+important with new ICS, and accepting the current match offer is easy
+with the new ICS command "accept" (can be abbreviated "ac").
+
+* LoadGame and LoadPosition display tail of file name (plus index
+number, if any) as title.
+
+* MachineWhite, MachineBlack, and TwoMachines now work properly from
+LoadGame and LoadGame+Pause mode.
+
+* Use o-o and o-o-o to castle on ICS, not 00 and 000.
+
+* Stripped out code for old ICS messages; new ICS is now installed.
+
+* Bug fix: don't offer autosave when paused during LoadGame.
+
+2.1, patchlevel 7 - Fri Dec 11 17:40:56 PST 1992 - mann@src.dec.com
+
+* Track change to "Illegal move" message in new ICS.
+
+2.1, patchlevel 6 -- Tue Dec 8 10:48:44 PST 1992 -- mann@src.dec.com
+
+* Kludged around bug in keeping comment popup where you put it by
+adding borderXoffset and borderYoffset resources that give the width
+of the borders added by the window manager. Yucch.
+
+* Changed searchDepth kludge back to using "help" instead of "bd"; the
+latter didn't work because the output contains a line starting with
+"White", so we think gnuchess is telling us that White won. Oops.
+
+* Removed some code that uses an X11R5 feature, XrmGetDatabase.
+Without this, the auto font sizing code is harder to make work, so to
+keep my sanity I had to change it to affect only the fonts that appear
+in the main window and the comment popup, not the other popups. Maybe
+this is better anyway.
+
+* AcceptMatch button now works after a counterchallenge, too.
+
+* Added code for more variants of messages about games being adjourned
+or aborted. These messages need to be unified in new version of ICS.
+
+* Added workaround for minor bug in ICS; game number on first board
+can be wrong.
+
+* Removed code to say "refresh n" instead of "refresh"; was broken and
+wasn't needed anyway.
+
+* Added missing casts for compilers that distinguish enums from ints
+and missing cast in connect call.
+
+* Added code to recognize "both sides are out of time" draw message
+proposed for next version of ICS.
+
+* Thanks to Danny Sleator and Joe Peterson for bug reports.
+
+2.1, patchlevel 5 -- Sun Dec 6 19:52:40 PST 1992 -- mann@src.dec.com
+
+* Removed gcc and CDEBUGFLAGS from Imakefile.
+
+* Corrected setting of mode to ForceMoves when game file ends or
+contains an AmbiguousMove or BadMove. Previous bug was harmless.
+
+* Added AcceptMatch button and mention of 50-move rule for Draw button
+to man page.
+
+2.1, patchlevel 4 -- Sun Dec 6 02:55:42 PST 1992 -- mann@src.dec.com
+
+* Now handles revised messages from new version of ICS. New ICS is
+not released yet, so this code might change further. Next patchlevel
+will remove support for old ICS; both are there now.
+
+* Initial processing for a new game being watched or played now
+happens when we see the first board image. Removes the need to parse
+some messages and unifies some code.
+
+2.1, patchlevel 3 -- Tue Dec 1 19:40:40 PST 1992 -- mann@src.dec.com
+
+* Handles ICS messages "Draw : neither player has mating
+material" and "Draw : White has no material, Black has no time."
+
+* Added AcceptMatch button for ICS mode.
+
+* Fixed bug in previous fix to yylexstr().
+
+* Fixed bugs in code for loading old position files that don't start
+with "#" and for handling case where user asked for nth position in
+file but there aren't that many.
+
+* Handles ICS message "* has restored your old game"
+
+* ResetProc always clears title line now.
+
+* Don't issue just "refresh" when watching a game; use game number.
+Upcoming new version of ICS may need this.
+
+* Added code to try to prevent user from watching and/or playing more
+than one game at a time. There is a race condition inherent here; if
+we get more than one board from the game before our command to stop
+watching it takes effect, we'll think the user started it again. Not
+clear how to fix this.
+
+* Redid ParseBoard8 to use sscanf. Code is a good deal cleaner now.
+Also, we now parse out the game number too, though we don't make much
+use of it yet.
+
+* (Tried to put in a feature that recognizes the current game in a
+game file must have ended when we see the start of a new one, but had
+to disable it because we have too many false hits with the current
+parser, especially in gnuchess listing files.)
+
+* Moves read from game files or received from ICS are now translated
+into canonical algebraic form just like all other moves. Minor nit:
+If you use Reset while playing or observing a game in ICS mode, the
+game history (including the current board position) is lost, so the
+next move of the current game can't be translated.
+
+* Default fonts now vary with board size, and are chosen by pixel size
+instead of point size (since piece bitmaps have a fixed pixel size).
+
+* Bug fix: An extra Forward was required to skip over time indications
+in game files.
+
+2.1 patchlevel 2 -- Fri Nov 27 23:30:00 PST 1992 -- mann@src.dec.com
+
+* If you move the comment popup, the next time it pops up it will come
+back where you put it.
+
+* Fixed yylexstr() so calls to it can be interspersed with calls to
+yylex().
+
+* Fixed bugs in Forward/Backward while in LoadGame mode.
+
+* Changed Save{Game,Position} functions to append instead of
+overwriting if file exists. Changed Load{Game,Position} functions to
+deal with multiple games/positions per file.
+
+* Changed load{Game,Position}File resources to trigger automatic load
+on program startup. Changed save{Game,Position}File resources to
+trigger automatic save after every completed game and on program exit.
+
+* Added autoSaveGames mode.
+
+* Fixed bug with PromoPiece in call to MakeAlg from MakeMove.
+
+* Many changes to get rid of picky compiler warnings and generally
+clean up the code.
+
+2.1 patchlevel 1 -- Fri Nov 27 02:45:00 PST 1992 -- mann@src.dec.com
+
+* A last minute change before patchlevel 0 went out broke
+ParseGameHistory(). Immediately fixed in patchlevel 1.
+
+Version 2.1, patchlevel 0 -- Fri Nov 27 02:00:00 PST 1992 -- mann@src.dec.com
+
+* Uses "time" command of gnuchess 4.0 and following to keep clocks in
+sync. Still works with older versions without this command; we test
+whether the command is present the first time each chess program is
+started.
+
+* File name dialog pops up under the mouse cursor, so that it's got the
+keyboard focus if the window manager is using pointer focus.
+
+* Attempts to move the wrong color piece or an empty square are filtered
+out in xboard instead of being passed on to GNU Chess or the ICS.
+
+* The reason a game ended is now remembered even if you move backward
+and forward after it ends. It is forgotten only if you make a move
+(which is as it should be---this is now a different game, which hasn't
+ended yet). The message saying why the game ended no longer wipes out
+the last move.
+
+* Pause, Backward, Forward, ForceMoves, and EditPosition now work from
+TwoMachines mode.
+
+* Forward and Backward now change only the board display unless you
+are in ForceMoves mode. Pause mode keeps new moves that are received
+from being displayed on your screen until you unpause (or use
+Forward).
+
+* Added option to ring the bell after opponents' moves.
+
+* Saved games that start from other than the standard initial position
+now begin with a postion diagram as in saved position files. The
+loader is modified to understand such save files.
+
+* Improved error checking when trying to read from gnuchess.
+
+* Parser understands things that look like time indications, e.g., (0:12),
+instead of popping them up as comments.
+
+* Send "quit" to gnuchess before trying to kill it. I needed this
+locally because sending a SIGTERM to rsh was not killing the remote
+program on some internal field test systems we have.
+
+* Merged in code from John Chanak to make xboard a front end to the
+Internet Chess Server, and added several improvements of my own.
+(These include parsing end of game messages, loading the current state
+and previous history of a game that's joined in progress via "watch"
+or "load", automatic switch from board style 1 to 8 when needed,
+removing irrelevant buttons and adding some new ones, adding the
+useTelnet and gateway resources, and miscellaneous code cleanup, bug
+fixes, and documentation.) Many thanks to John for writing and
+contributing the initial version of this code.
+
+Fri Oct 30 20:16:40 PST 1992 (patchlevel 25) mann@src.dec.com
+
+* gnuchess now castles by sending us "o-o" or "o-o-o" (starting with a
+preliminary version of 4.0.pl60 that I have). Added code to handle
+this. The old format ("e1g1", etc.) still works too.
+
+* Added code to format moves in normal abbreviated algebraic notation
+(for example, e4, exd4, f8Q, Nf6, 0-0) instead of coordinate algebraic
+(for example, e2e4, e3d4, f7f8q, g1f6, e1g1). Moves entered with the
+mouse or received from gnuchess are translated into this canonical
+format for display on the message line or in saved game files. Moves
+read from game files are not translated, however; they are shown and
+saved just as they appear in the file.
+
+Mon Sep 14 13:19:01 PDT 1992 (patchlevel 24) mann@src.dec.com
+
+* It's not really correct to write an ep capture of a pawn on e5 as
+fxe5; this should be written as fxe6 because e6 is where the capturing
+pawn ends up. Nevertheless, the parser now interprets fxe5 as the ep
+capture f5xe6 unless there is a pawn on f4, in which case it
+interprets fxe5 as f4xe5. By design, the parser does not flag fxe5 as
+ambiguous if there are pawns on both f4 and f5; instead it prefers the
+more legitimate f4xe5 interpretation.
+
+* A move like fxe6 or fe6 is now interpreted as an e.p. capture of the
+pawn on e5 if there is one there and e6 is empty.
+
+* A move like fxe5 can no longer be interpreted as an e.p. capture if
+there isn't a pawn on e5 to be captured. Previously this could happen
+erroneously if there were pawns on both f4 and f5, and the f4 pawn was
+capturing a piece on e5.
+
+* The parser no longer munges the move it is parsing; in the past, for
+instance, it would remove the "x" from a move like dxc5 before echoing
+it to the screen.
+
+* The parser now detects when a move is ambiguous and returns an
+error, instead of arbitrarily choosing one possibility as it used to.
+
+Mon Aug 10 18:40:47 PDT 1992 (patchlevel 23) mann@src.dec.com
+
+* Added code so parser can handle fully qualified algebraic, e.g.,
+Ng1-f3, N/g1-f3, Ng1f3, or even Pe2-e4. The "P" and "/" work only for
+fully qualified moves, not generally.
+
+* Fixed parser bugs in handling moves with rank or file disambiguator,
+e.g. N1f3 or Ngf3.
+
+Mon Jul 6 17:55:32 PDT 1992 (patchlevel 22) mann@src.dec.com
+
+* AIXV3 patch from Tom McConnell; thanks!
+
+* After hitting the Backward button we see the last move made instead of
+the word "Pausing" displayed.
+
+* Fixed a couple of problems compiling on IRIX; thanks to Michel Arsenault
+and Alan Walsh for bug reports and help with fixes.
+
+* Added optional display of algebraic notation coordinates along left and
+bottom edges of board. This was inspired by some code from Jean-Christophe
+Engel; thanks!
+
+* Swapped EditPosition and Pause buttons to reduce danger of losing the
+game in progress by hitting EditPosition when you wanted Backward. Thanks
+to Ove Lundberg for complaining (though it bugged me too).
+
+* Despite one complaint, I kept the feature of changing both clocks when black
+makes time control, rather than changing each individually when the player
+involved makes it. This is to avoid having it look like White is way ahead on
+time while Black is thinking about the last move of the time control period
+(i.e., when White has made time control but Black hasn't yet).
+
+* Corrected clocks to work as in real tournaments. Time is *added* when you
+reach time control; previously the clocks were simply set to the length of the
+new time period. Also, when a player's flag falls, he still does not receive a
+new time allotment at the next time control, but his opponent does still
+receive more time if *his* flag has not fallen; previously, time controls were
+ignored for both players if either flag fell. I forget who reported this bug.
+
+* Added a small ESIX patch from Kayvan Sylvan.
+
+Mon Jun 22 13:24:38 PDT 1992 (patchlevel 21)
+
+* Added some SVR4 support code from Ronald Cole. It's Greek to me.
+
+* Note: Stephen Meatheringham reports a bug causing xboard to crash with an
+error from the X server when run on a Sun Sparcstation IPX with Solaris 1.0.1
+and OpenWindows 3.0. This bug has not been tracked down yet.
+
+* Fixed a problem with ATTENTION code. On some operating systems, you have to
+be even more cautious about when you send a SIGINT to gnuchess, because the
+signal handler gets deinstalled each time it is used, and gnuchess does not
+reinstall it immediately. In particular, if you send a SIGINT and make an
+illegal move or ask for a hint, gnuchess does not reinstall the handler until
+*after* you make your next move, so you had better not send a SIGINT before
+it. I put a workaround for this case into xboard; I hope there are no more.
+
+* The ATTENTION code is needed when compiling for the ESIX operating system,
+because ESIX has a bug in the FIONREAD ioctl, so the code in gnuchess that
+lets you interrupt its thinking on your time just by typing in your move does
+not work. Perhaps gnuchess will have a workaround for this eventually.
+
+* Fixed yet another bug in using XtGetValues; code to inhibit shell resizing
+was leaving a null pointer as the place to store the current sizes.
+
+* Man page fixes: corrected -sl to -sd, updated LIMITATIONS.
+
+* Added include of <sys/time.h> conditional on HAS_GETTIMEOFDAY. I hope this
+works for all systems; on mine, <time.h> and <sys/time.h> are the same file,
+but with an #ifndef that makes it harmless to include both.
+
+* Thanks for reports from Mike Pearlman, Stephen Meatheringham, Kayvan Sylvan,
+d87-mal@nada.kth.se, Urban Koistinen, and Ronald Cole.
+
+Mon Jun 8 11:39:18 PDT 1992 (patchlevel 20)
+
+* Documented default value of initString and explained what it means. This
+paragraph also serves to inform the user that xboard by default will tell
+gnuchess to think on his time, something one user apparently didn't understand.
+
+* Redid -searchDepth (formerly -searchLevel) and -searchTime code. They both
+work correctly with gnuchess 3.1 now. The -searchDepth option also works
+correctly with gnuchess 4.0. The -searchTime option does not work with
+gnuchess 4.0.pl50 or earlier because those gnuchess versions do not have a
+working searchTime feature. Instead of having xboard do a half-baked emulation
+of this feature by using a 1-move time control, I will be submitting a patch to
+the gnuchess folks to restore the feature as in 3.1.
+
+* Improved clock code. It now keeps accurate track of fractional seconds of
+clock running time, if your system has gettimeofday(); if not, it is generous
+about them---if a clock has been going for n.m seconds when it is stopped, only
+n seconds are charged. Previously, xboard would charge one second immediately
+when a clock was started, so if n.m had elapsed when it was stopped, n+1 would
+be charged. This should stop xboard from thinking gnuchess has let its flag
+fall on the last move of a time control, as it often did before. I also
+improved the comments and condensed the code a little. I hope there are no
+systems that have X11 and don't have gettimeofday(), but if there are, I'd like
+to know what to replace it with.
+
+* "Flag dropped" messages now show up on the top line, beside the clocks, so
+that they don't obscure more interesting messages on the second line.
+
+* Fixed confusion of NULL and '\000'.
+
+* Include time.h to get ctime() declaration.
+
+* Fix to "parser bug" messages in parser.l.
+
+* Changed code to work with old-fashioned tolower() macro that requires its
+argument to be an uppercase letter.
+
+* Minor fix to some usage error messages; was reversing program name and
+erroneous argument value.
+
+* Thanks to Mitch Wright, Ranier Orth, and Henrik Schmiediche for bug reports.
+
+Fri Jun 5 13:06:08 PDT 1992 (patchlevel 19)
+
+* Note: xboard does not seem to work when compiled with gcc 1.40 on a
+PS/2 running AIX. It crashes at the sscanf in line 768 of xboard.c.
+You can work around the problem by specifying the -timeControl option
+on the command line instead of defaulting it. This does not seem to
+be a bug in xboard itself; it runs okay on PS/2 AIX when compiled with
+MetaWare High C. [But see 2.1.pl8 above.]
+
+* Removed bogus files from distribution.
+
+* Changed variable name that conflicted with SVR4 ttyname function.
+
+* Thanks to Christoph Strozyk for another bug report, and to several
+of the folks mentioned under patchlevel 18 for testing it.
+
+Wed Jun 3 17:50:37 PDT 1992 (patchlevel 18) mann@src.dec.com
+
+* Added an include of sys/fcntl.h to pick up the definition of O_RDWR for
+System V users.
+
+* Fixed a bug in CatchPipeSignal; was testing the wrong variable to determine
+which chess program got the signal.
+
+* Removed the declaration of strrchr, which was causing problems for some
+people, and added an include of <string.h> or <strings.h> instead.
+
+* Fixed a bunch of type errors uncovered by compilers that check more carefully
+than the one I was using. I just patched many of them with casts---typically
+cases where a function didn't take the same number and type of arguments as the
+X header file prototype said it should---because I didn't see any other way to
+fix them. The versions of the X header files that I have don't actually have
+full prototypes for these function types; they declare only the return type and
+just give the argument types as comments.
+
+* InitChessProgram returns immediately if chess program died while we were
+waiting for it to say "Chess". I think this fixes a bug that could make xboard
+crash or go into an infinite loop printing "Warning: Select failed; error code
+9" if gnuchess crashed there.
+
+* Removed code that tries to put the file descriptor used to read messages from
+gnuchess into nonblocking mode. I don't see how this kludge could ever have
+fixed the problem it was intended to (see below), and it seemed to be causing
+a race condition when we were waiting for the initial message from gnuchess
+after it started up.
+
+* Thanks to Richard K. Lloyd, Konstantinos Konstantinides, Mark
+Seiden, Erik Schoenfelder, Andreas Stolcke, Rainer Orth, Henry Thomas,
+and Kris Van Hees for bug reports and help with fixes.
+
+Sun May 31 08:00:00 PDT 1992 (patchlevel 17) Bart Massey bart@cs.uoregon.edu
+
+* 'xboard' suffered from a couple of serious bugs. An initial
+ size needed to be given to the message label to avoid a race
+ condition (!) so I gave it some text (otherwise occasionally
+ xboard would fail because the message widget was 0 width under
+ MIT X11R4). The sizes needed to be Dimension, not int, because
+ they were written in by Xt -- on my big-endian box Dimension
+ is short, causing chaos. Also, I hacked a declaration in for
+ strrchr() to shut the compiler up -- this is arguably a kludge,
+ but I couldn't think of anything better; maybe you can.
+
+Fri May 22 13:40:50 PDT 1992 (patchlevel 16)
+
+* First real (non-beta) release of version 2.0.
+
+* Added GNU copyleft notices covering version 2.0 enhancements.
+
+Thu May 21 12:30:09 PDT 1992 (patchlevel 15)
+
+* Removed -g from Imakefile.
+
+* Added casts in parser.l to prevent warning messages from some C compilers.
+
+* Bugfix: code to exit if chess program couldn't be started had bug in error
+message printing.
+
+Tue May 19 11:58:06 PDT 1992 (patchlevel 14)
+
+* Fixes one small bug: If LoadGame does not find a game in the file, it resets
+xboard to BeginningOfGame mode (as if the Reset button was pressed), instead of
+leaving it in LoadGame mode.
+
+Mon Apr 13 18:32:27 PDT 1992 (patchlevel 13)
+
+* Improved error handling when gnuchessx crashes. Now displays a message and
+enters EndOfGame state without exiting. This should help with diagnosing
+gnuchessx problems, since the position and move history are not lost.
+
+* Debugged man page.
+
+Version 2.0 -- Thu Apr 2 16:04:54 PST 1992 (patchlevel 12)
+
+* Added small 40x40 pixel pieces; board size now specified as small, medium, or
+large.
+
+* Improved man page.
+
+* Saved position files now say "white to play" if it's white's move.
+
+* SavePosition while in EditPosition mode now gets side to play right.
+
+* Made "Pawn" the default on edit position menus.
+
+* Removed "To play" from edit position menus, since it's redundant. Left
+support code in so it can be restored if someone wants it.
+
+* Tightened parser's definition of a move number to help further with skipping
+over stuff before the first move.
+
+* Put back feature of skipping over stuff in game files before a start of game
+marker. This helps when loading electronic mail messages that have things
+like "00" in the header (looks like castling), or that talk about moves in
+running text before the actual game score. Tradeoff is that we can't load
+games that don't either have move numbers or say "gnuchess game" just before
+the moves.
+
+* Changed version number to 2.0 because others have used "1.3" for patched
+versions of 1.2. Display version number and patchlevel at startup.
+
+Thu Apr 2 15:30:22 PST 1992 (patchlevel 11)
+
+* Bugfix: Match started with TwoMachines button now handles the case where
+user loaded/edited a position *and* forced some moves.
+
+* added error message feedback to many cases where the user's button press is
+rejected because it isn't allowed in the current mode.
+
+* added -noChessProgram option to allow use as a passive chessboard without
+gnuchess, replacing old buggy scheme that tried to do this automatically when
+gnuchess was not found on the search path.
+
+* parser accepts "=" in front of promotion piece
+
+* parser accepts ":" notation for captures
+
+* Removed SwitchSides button to make room for EditPosition. Left code in
+place, ifdef'ed out.
+
+* Added EditPosition mode.
+
+* Reformatted xboard.c to eliminate long lines.
+
+* Promotion popup now appears near rank to which pawn is moving.
+
+* UI improvement: Button representing current program mode is kept highlighted.
+
+* Bug fix: Hint button is now disabled when machine is on move.
+
+Sat Mar 21 14:57:37 PST 1992 (patchlevel 10)
+
+* TwoMachines now works from MachineWhite or MachineBlack mode.
+
+* ForceMoves and Backward/Forward now work at the end of a game started by
+the TwoMachines button.
+
+* Sends o-o or o-o-o to gnuchess instead of O-O or O-O-O.
+
+* Bug fix: SwitchSides button is now disabled when machine is on move.
+
+* Added -searchLevel option and corrected handling of -searchTime to reflect
+the way gnuchess really handles command line options instead of what the
+documentation used to say. Allowed optional ":seconds" on times.
+
+Tue Mar 17 21:00:35 PST 1992 (patchlevel 9)
+
+* Removed non-working code that tried to recover when a remote chess program
+could not be started; now exits with a message instead.
+
+* Now waits for chess program to print its first message (normally "Chess")
+before sending it any commands.
+
+* Matches between two machines can now start from a black-to-play position or
+black-to-play opening.
+
+* Bug fix: The program would sometimes lose track of the board position after
+the end of the game, drawing a board full of white pawns next time it got an X
+redraw request. Now fixed.
+
+* Cleaned up handling of illegal moves in game files. Now we just stop reading
+and go into ForceMoves mode.
+
+* Saved games against gnuchess indicate who won (restored and debugged 1.2
+feature).
+
+* Setting -searchTime turns off -clockMode.
+
+* My trick for setting up a black-to-play position broke in the transition from
+gnuchess 3.1+ to 4.0. Installed a different trick that works with both.
+
+* Bug fix: Was clobbering memory by mallocing one byte too few for the file
+name in SetupPositionFromFileProc. This usually resulted in a crash on the
+second attempt to load a position from a file.
+
+Mon Mar 16 16:49:00 PST 1992 (patchlevel 8)
+
+* Game and position files are saved in CHESSDIR as well as loaded from there.
+We actually chdir there, so gnuchess listing files also wind up there.
+
+* Underpromotion moves from gnuchess really work now.
+
+Sat Mar 14 14:55:24 PST 1992 (patchlevel 7)
+
+* Cleaned up lots of bugs and kruft in parser.l. It's a wonder the old version
+worked at all. Improved rejection of random text interspersed with the moves.
+
+* Relabeled buttons to reduce confusion (Play From File --> Load Game;
+Setup From File --> Load Position).
+
+* Bug fix: Doesn't exit at the end of a game that was started by pressing
+the Two Machines button.
+
+* Bug fix: Doesn't get confused if you hit Machine Black (White) while
+the machine is already playing black (white) and is on move.
+
+* Prints "White to play" or "Black to play" after loading a position file.
+
+* Bug fix: No longer hangs if no start-of-game is found in a game file.
+
+* More permissive about game file format. The first line is not assumed
+to be a header comment unless it starts with "#". We don't insist on
+seeing a "1." before the first move.
+
+* Added pop-up dialog to allow underpromotion. Moving a pawn to the last rank
+pops up a dialog to let you select what piece to promote to. Also added code
+to handle underpromotion moves from gnuchess or from a game file correctly.
+
+* Added code to send SIGINT to gnuchess before trying to move, if gnuchess
+might be busy thinking on our time. The code is ifdef'ed out because it's
+not necessary; only beta-test versions of gnuchess 4.0 at patchlevel 19 or
+below require it.
+
+Mon Feb 24 20:10:22 PST 1992
+
+* Merged fixes received from Stuart Cracraft and Mike McGann, to iconic mode
+and to ShutdownChessPrograms. (They both sent the same fixes.) I did not
+install the change that removed "easy" from the initialization string, so
+xboard will still try to run gnuchessx in "hard" mode (thinking on opponent's
+time) by sending this command.
+
+Version 1.3 -- Thu Dec 19 18:19:00 PST 1991 mann@src.dec.com (Tim Mann)
+
+* I've fixed a slew of bugs in this version of xboard:
+
+* You can now back up from the end of a game, even if gnuchess was playing
+against you. Since gnuchess exits upon mate or draw (when it's not in force
+mode), this feature works by starting up a new copy of gnuchess and feeding it
+the saved starting position and moves. Drawback: the new gnuchess starts with
+clocks at the beginning of a fresh time control.
+
+* Note: the "force" command to gnuchess is a toggle. I fixed a couple of
+places in xboard where "force" was being issued when gnuchess was already in
+force mode, which resulted in chaos. I don't know if they were in 1.2 or if I
+added them myself in the course of putting in new features.
+
+* ForceMoves button is now legal in PlayFromFile mode. It closes the game file
+and lets you force moves (or go Backward) from whatever position you've
+reached.
+
+* The parser now recognizes "white resigns" and "black resigns" (in any
+combination of upper and lower case, with or without the closing "s"). These
+used to be misinterpreted as meaning "white wins" or "black wins" respectively!
+Added "1 - 0" and "0 - 1" as equivalents for "1-0" and "0-1".
+
+* I removed the parser feature of considering "!" as a comment delimiter.
+"!" is so common as an annotation in game scores that this feature seems like a
+very bad idea.
+
+* Added a wait() after each successful call to kill() to avoid leaving zombie
+processes around.
+
+* Removed the feature of putting an indication of how the game ended into the
+internal move list when playing from a file. The only benefit of this was that
+it would get written back out if you saved the game at that point. This
+feature doesn't seem too useful, since you are unlikely to save a game you've
+read in without making any changes, and it caused a lot of problems in the code
+and user interface. The end condition is still displayed as a message when
+it's first read in from the file. End conditions when playing against gnuchess
+are still saved, too.
+
+* programName is now the last file name component of argv[0], not all of it.
+
+* xboard.c got three compiler warnings due to arguments that didn't match the
+prototypes on X toolkit functions. I got rid of them by adding some casts, and
+adding extra unused arguments to the ReceiveFromProgram function.
+
+* As I received it, the distribution had an extra period glued on the front
+of every line that started with a period. This broke the manpage in an
+obvious way. It also broke parser.l in a nonobvious way that stopped
+PlayFromFile from working.
+
+* Fixed one or two bugs where the clock was started when it shouldn't have
+been. I think one example was if you tried an illegal move in ForceMoves mode.
+
+* Now starts the machine's clock if you hit MachineWhite when white is on move
+or MachineBlack when black is on move.
+
+* Now updates the to-move indicator (highlight on clock display) when you use
+Forward/Backward or ForceMoves.
+
+* gnuchess 3.1+ has a bug that makes it try to think on its opponent's time
+even when in force mode; this causes problems with xboard's SetupFromFile
+command because gnuchess's saved hint move is garbage after the new position is
+loaded, so gnuchess prints out an error message when it tries to think about
+what it would do if the user made this move. Here is a patch for gnuchess
+3.1+:
+
+*** nondsp.c~ Mon Dec 2 12:37:18 1991
+*-- nondsp.c Thu Dec 19 15:36:06 1991
+***************
+*** 1223,1229 ****
+ ok = flag.quit = false;
+ player = opponent;
+ ft = 0;
+! if (hint > 0 && !flag.easy && Book == NULL)
+ {
+ fflush (stdout);
+ time0 = time ((long *) 0);
+*-- 1223,1229 ----
+ ok = flag.quit = false;
+ player = opponent;
+ ft = 0;
+! if (hint > 0 && !flag.easy && Book == NULL && !flag.force)
+ {
+ fflush (stdout);
+ time0 = time ((long *) 0);
+
+* SavePosition/SetupFromFile now handle black-to-play positions. If it's
+black's move in a saved position, the line "black to play" is printed
+immediately after the board display. Upon loading a position, xboard
+looks for "black" at the beginning of this line to determine whether it's
+black's move.
+
+* SetupFromFile now leaves you (effectively) in ForceMoves mode. This
+eliminates some cases where the program would get into an inconsistent state,
+and hopefully is more intuitive for the user, too.
+
+* PlayFromFile now leaves xboard in ForceMoves mode after playing through all
+the moves in the file. You can use Backward/Forward, make moves, get gnuchess
+to join the game with MachineWhite or MachineBlack, etc. The game file can end
+with either white or black to play.
+
+* Backward/Forward now seem to work in all cases. Previously using these
+buttons during a game against the machine would get xboard out of sync with
+gnuchess's idea of what was going on, resulting in chaos. Now using these
+buttons puts xboard in ForceMoves mode; you can bring gnuchess back into the
+game using the MachineWhite or MachineBlack buttons.
+
+Thu Jun 27 15:06:25 PDT 1991
+
+ * Remove comment popups during a reset.
+
+ * Bug in my forward move fix. Didn't work for playgamefile mode.
+
+Thu Jun 20 15:04:06 PDT 1991
+
+ * Can't do a backward move when it isn't your turn because gnuchess
+ gets confused. Similar bug for forward move. Do a bunch of moves,
+ back up move and go forward. These get filtered out now.
+
+ * Put easy back into the initString. This DISABLES easy mode which by
+ default is ON.
+
+ * New-line wasn't always being added to forward move strings sent to gnuchess.
+
+ * Parsed comments as [ ..............text follows ] into d7d5
+
+ * Long game file comments cause core dumps on HP systems.
+
+ * Multiple uses of the get positition file button got confused
+ on the second click.
+
+ Minor fixes to the 1.2 release
+
+Version 1.2 -- Tue Jun 11 17:14:12 PDT 1991
+
+ * For version 1.2, Jeff Kenton, Richard LLoyd, David Jensen, Martin D.,
+ Bill Schmidt, Scott Hemphill, Paul Vaughan and Bill Shauck all found
+ a lot of bugs that we put into xboard just to see if they were paying
+ attention. They were.
+
+ * Changed the protocol that xboard uses to work with the new version of
+ gnuchessr.
+
+ * There was an off by one error with the clock resetting code. Also,
+ the clock display highliting was wrong. Thanks to Bill Shauck for
+ pointing these out.
+
+ * enumerations are not really integers on some C compilers. I added casting.
+ The new version of gnuchess expects the "go" command for two machine
+ and machine plays white cases. The whiteString resource is for
+ compatibility with previous gnuchess versions which get confused by go.
+ Thanks to Martin D. for catching these.
+
+ * Fixed a bug where the checkmate message wasn't being parsed and xboard
+ kept playing. Also, the message was added to game file if saved.
+ Thanks to Scott Hemhill for pointing this out.
+
+ * Fixed a bug where saving a long game, resetting and saving a short game
+ resulted in appending the end of the long game to the short one.
+ If a game is just being played out and there is no reason for gnuchessr
+ to be used, ignore pipe signals. This allows people to use xboard
+ as a chess board without need for gnuchess. Also, trivially bad moves
+ such as e2e2 are not passed on to gnuchessr but instead ignored out of
+ hand. This allows people using xboard as a chessboard with gnuchessr
+ to pick a piece up, think and put it back down without making a move.
+ Thanks to Jeff Kenton for pointing these out.
+
+ * Added the CHESSDIR environment variable. Game and position files are
+ found in this directory. If this variable is not declared, then the
+ current directory is used. File names starting with / are treated
+ specially.
+
+ * The bitmap file names were changed so that none exceeded 14 characters.
+ This is necessary for R5.
+
+ fcntl(from_prog[0], F_SETFL, O_NDELAY);
+
+ The xboard fix was to set non-blocking i/o on the read pipe for gnuchessr
+
+ printz ("Illegal move (no matching move generated)");
+
+ * fixed a problem with the new version of gnuchessr where xboard wasn't
+ getting gnuchessr error messages for illegal moves. The problem seems
+ to be fixed *without* any gnuchess changes but this is likely to be
+ highly system dependant. There should be a new line on line 246 of nondsp.c
+
+ * -iconic doesn't work at all now. The Iconify() does work. This was
+ a tradeoff and it is really an Xt bug.
+
+ * Fixed a compiler warning for gcc and an error for the IBM RT compilers.
+ This is the VOID_PROC macro in xboard.h. Thanks to David Jensen for this.
+
+ * If the DisplayWidth or DisplayHeight is less than 800, use small size mode.
+ Also the size of the name widget was reduced from 500 pixels to 400 pixels
+ because in small size mode there was a gap on the right.
+ Changed the default font from fixed to helvetica_oblique14 to:
+ **-helvetica-bold-r-normal--14-*-*-*-*-*-*-*
+ helvetica_oblique14 is a font alias not on all R4 systems.
+ Curiously enough, the 17 point is not available on 75dpi systems
+ and the 18 point font is not available on 100dpi systems.
+ Thanks to Richard K. Lloyd for pointing these out.
+
+ * Minor hacks to work with R5 alpha. Had to add an event handler to the
+ boardWidget to get translations to work. This may go away with the real R5.
+ Added <Message>WM_PROTOCOLS: QuitProc() for R5 ICCCM compatibility.
+
+ * If the first character of the file is not `1' then the first line
+ of a game or position file is displayed as the name in a label widget.
+
+ * Added a PopUp dialog for getting file names.
+
+ * Modified the code to use the R4 routines rather than R3 compatibility.
+
+ * Changed the forwards/backwards/readgamefile code to allow a play to step
+ back and forth in a game. If he steps all the way to the beginning
+ he has to restart the game. If he gets into a mated position, same problem.
+
+ * Moved the man page from xboard.1 to xboard.man. This makes imake man page
+ installs work correctly. Thanks to Richard K. Lloyd for pointing this out.
+
+ * Corrected the queening code. XBoard was sending the wrong syntax.
+ It was sending for example h8(Q) when it should have been sending h8q.
+ Thanks to Paul Vaughan and Mike McGann for pointing this out.
+
+ * Added a lex parser for algebraic games. It should be easy to use the parser
+ for other interfaces such as the Microsoft Windows version.
+ It parses comments of the form [anything] and ! to the end of a line.
+
+Version 1.1 -- Mon Jan 7 14:46:03 PST 1991
+
+ * Roger Dubar, Konstantinos Konstantinides, Wolfgang S. Rupprecht,
+ Paul Scowen, Mvh Smidt and Kayvan Sylvan all helped immensely during
+ beta-testing.
+
+ * older non-ANSI versions of Sun compilers complain vociferously.
+
+ * the remoteShell resource was added for HP-UX systems
+ and other systems where the remoteShell isn't rsh.
+
+ * -iconic doesn't work properly. If XBoard is opened iconic then
+ iconifying it later with a keystroke doesn't work. I think
+ this is an Xt bug.
+
+ * For systems with smaller screens, XBoard can use smaller pieces,
+ and a smaller board. -bigSizeMode False uses a smaller set of pieces.
+ These are scaled versions of the large pieces. They look ok but could
+ be improved.
+
+ * getlogin() does not work in all cases.
+ It was replaced by getpwuid(getuid())->pw_name).
+
+ * Warning messages get displayed in the message box.
+
+ * Any button restarts a paused game.
+
+ * Kayvan Sylvan contributed a patch for ESIX.
+ It seems that select() on pipes is broken on his system. We declined
+ to incorporate his patch though, because it was a work-around for
+ something that was broken on one system, and selfishly, that system
+ was not my own. Nevertheless, it is likely that other System V users
+ on PC's may need to use this patch and it is is included as the file
+ ESIX.patch. To use it, type
+
+ patch xboard.c ESIX.patch
+
+ * Fixed a bug where hint didn't work. The local version of gnuchessr
+ had been hacked. The fix was to clone stderr and stdout for gnuchessr.
+
+ * Fixed a bug where a player could play after a game had been finished.
+
+ * The bitmaps have been pushed into the bitmaps directory.
+
+ * Substantially rewrote and simplified the Two Machine code.
+
+ * Added StrStr() because many systems don't have this ANSI function.
+
+ * Added keyboard equivalents. Added an iconify keystroke, C or c.
+
+ * Works with gcc now. gcc complained about casting float constants
+ as XtPointers.
+
+ * Detect if the visual doesn't support color. If so, run in monoMode.
+ An alternative would be to detect grayscale visual and use a collection
+ of gray user interface colors.
+
+ XBoard.clockMode: False
+
+ * For people who don't like or use chess clocks a clockMode switch
+ has been added. It is on by default. It can be turned off in the
+ .Xdefaults file with
+
+ * Added a declaration, xtVersion, which will quickly break on R3 Intrinsics.
+
+ * Hal Peterson contributed a new Imakefile.
+
+ * Rewrote DisplayClocks().
+
+ * Rewrote TwoMachinesPlay mode.
+
+ * Konstantinos Konstantinides added the -searchTime option.
+
+ * Substantially rewrote and simplified the clock code. If a game was paused
+ and then resumed, the clocks were out of sync.
+
+ * Fixed a bug in HandleUserMove() where the user could make a move while the
+ machine was thinking. The fix detects and ignores these moves. onMove
+ was not being used and was removed.
+
projects / xboard.git / blobdiff