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README
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1994-03-27
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v2.78
Fixed some NULLMOVE and search bugs, that could cause
unusual performance, especially in endgames.
MAJOR Hash table performance boost, much faster eval
as a result.
Many enhancements to search/recapture extensions in search(),
result in deeper searches, better eval per ply as well.
Redid the white/black books, more variety, no real
stupid openings, still very small book, but seems
to be a safe one, and more variety than the stopgap
book I was using.
This version supports 3rd party graphics cards.
It supports them "natively" using the screenmode requestor.
DO NOT use any screen promotion utilities like ChangeScreen
or whatever, to promote the screens, just choose your
graphics modes native screen from the screenmode requestor.
For 15Khz monitor users, with AGA chipsets, the
64 and 256 color modes will now come up with
DEFAULT_MONITOR screens, rather than forcing PAL mode.
The screens will now autoscroll, so you can see the
whole 480 pixel high image, even on NTSC monitors.
3rd Party graphics notes:
You need OS version 3.0 or later for 3rd party graphics
support. GVP Spectrum owners note the NOBOBS CLI option
and the NO_BOBS=1 WB tooltype.
Do not use the RTG option on AGA/ECS modes, you can if you
want, but the displays will use more memory and
will be slower...
To start with 3rd party graphics cards there are 2 new
CLI options, RTG and NOBOBS:
UChess RTG
will start in RTG 3rd party graphics mode. This will
bring up the screenmode requestor and you can
pick a screenmode for chess play. It should be
640X480 to fit the bitmap...smaller will autoscroll
but 3rd party graphics software may not autoscroll
well...so use a 640X480 or larger screenmode
The corresponding TOOLTYPE to add in the WB icon
is :
RTG=1
******SPECIAL NOTE TO OWNERS OF GVP SPECTRUM EGS CARDS******
(OTHER BOARDS MAY HAVE THIS TROUBLE AS WELL)
(IF YOU HAVE LOCKUPS, TRY THIS)
The software with these boards will LOCK UP THE PGM
when it tries to use BOBS, to prevent this from
happening there is a new UChess argument. From
the CLI use:
UChess 0 RTG NOBOBS
this will inhibit UChess from using BOBS to animate/move
pieces. Meaning pieces you pick up with the mouse
will be invisible until you drop them onto a square.
This is due to deficiencies in the GVP software.
without the NOBOBS argument, the GVP lack of system
BOB support locks up the pgm entirely, so USE THIS OPTION!!
The corresponding TOOLTYPE in the WB icon is
NO_BOBS=1
v2.72
Fixed a slight time control problem, it was not adding
remaining time when # moves was completed.
Also fixed a nullmove problem that may have resulted
in wierd endgame checks.
v2.71
Fixed bugs in search causing selective deepening to be
too selective in many cases.
Redid the repetition code as per 4PL68 standards, can
now recognize perpetual check and other draw situations
more readily.
Many bug fixes which now make the ideas in 2.69 a reality
for all games. This version is more efficient, and makes
fewer mistakes vs strong opponents than 2.69 did.
Endgame is improved as well.
v2.69
Fixed some endgame deficencies, in King-Knight-Bishop vs King
endgame. Fixed some lookahead bugs, and some slight mouse vs
kbd display bugs.
v2.67
Totally new eval/search. This is based on gnuchess 4PL67 with
many enhancements. Searchs more nodes per ply, so will get
fewer ply on slow machines, but plays better. Also support for
Super72 mode 800X600X64 or 256 colors. New CLI arg Super72, new
Tooltype SUPER72=1. The L version requires 9M or more
of FASTRAM (like before, but this was not clear to everyone).
This version plays much more competitively vs skilled players
and good computers, less daring against lesser opponents though.
May not be as well suited to slower systems (020/030's), but
in all tests it seems stronger, even on A3000/25's.
(in computer v computer tests this version went 7-1-2 vs
Sargon5 on a 486, v2.54 usually went about 3-5-2 or so)
v2.54
Fixed some bugs with resign, and a small bug in undo
which caused mate msg to be displayed if you
undid mate.
Plays the same as 2.53
v2.53
Finally after days of effort I managed to find and
fix a couple of bugs introduced in 2.50 with the new
search on opponents time code...
Bug fixes and changes to genmove (movelist) nullmove
routines, and especially to search on opponents time
logic.
v2.52
Bug fixes to load game, and to transposition table routines.
Some attempt to deal with eval == 20000 bug.
Major speedup of movelist routines, speed of search and
eval greatly increased.
v2.51
Slight enhancement to endgame eval routines.
v2.50
Many changes incorporated from the Gnuchess 4PL64 release.
Any changes that did not conflict with UChess specific changes,
were merged into this version. Changes to endgame (major)
eval and search routines were made, to bring this
version up to Gnuchess 4PL64 standards.
Many changes to clock handling routine, UChess now
manages its clock MUCH better, and thinking on opponents
time is MUCH improved, making UChess far better than
before when this feature is enabled.
NOTE: Rate Pgm is now slower than before, it takes it
longer to calc some move situations because of a bug
fix to the history table. The older way resulted
in missed moves, but could calc some situations faster,
but not correctly. This new way results in slower calcs,
but correct calc of moves.
v2.35
Cleaned up Mating routines, UChess will now choose shortest
route to mate and not keep searching beyond that to come
up with strange endgame moves.
Fixed some eval and search buglets and fixed a side
effect in Take Back move. Now take back move will
clear out history buffer, so re-eval of moves after
takeback will result in best move being made, not
necessarily a different move from the last choice.
Taking Back a move now takes much more time, but
results in steady gameplay. Prior version often chose
alternate moves after take back a move was chosen.
Redid some of the positional modifiers in eval routines,
this version seems to play quite a bit stronger and
steadier than previous versions, when pressed.
Recompiled using SAS/C 6.51
v2.33
Exactly like 2.32 but will run on AmigaDOS 2.04 and 2.1 systems.
Calls to SetABPenDrMd were made unconditionally in v2.32 of UChess,
meaning v2.32 required AmigaDOS 3.0 or later to run..sorry.
v2.32 (recompiled using SAS/C 6.50)
New Display Option for AGA machines, at startup you can
specify FASTAGA (or 64) at the CLI or you can use the FASTAGA=1
or COLORS=64 arguments in the Workbench ICON, this opens UCHess on
a 640X480 or 640X512 64 Color Screen, for additional speed.
Especially helps display speed in the MultiScan Productivity mode.
It looks almost as good the 256 color screen and is much faster.
Rewrote some routines in 68020+ Assembly language, and
re-aligned many data items for more nodes/sec eval speed.
Redid the entire opening book code, uchess will now
look for uchess:uchesswhite.book when playing as
white and uchess:uchessblack.book when playing as
black, if it cannot find these it reverts to uchess:uchess.book.
Sample white/black/neutral books enclosed, but much
improvement/tuning of these books is needed.
In general the white/black should work best for now.
In the future I hope to come up with really optimal
white/black openings and include these, at least for
now the pgm will avoid openings that are real detrimental
to it by splitting the book into 2 parts.
Also made the edit request autoactivate the edit string gadget,
for more convenient edit game entry.
Also added a resign feature, if you have started the game
in a regular manner at advanced level, and you get over
9.5 pts ahead of UChess, it will offer to resign (once).
If you load a saved game, or edit the board, it will
not offer to resign. It will only offer to resign the game
one time.
v2.31
Re-Arranged the new game feature so it now pays
attention to the skill level when setting up a new board.
All new games came up as Advanced before, regardless
of skill level chosen
v2.30
Added a Level feature for play vs the computer.
3 levels are available, Advanced (same as before)
Intermediate (Knight Odds), and Easy (Knight + Queen Odds)
Choosing these options will force a