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~History of MacChess
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History of MacChess - Wim van Beusekom
======================================================================
TOBBER Atari Rotterdam 1989
I entered my TOBBER (Atari) chess program in the Dutch Computer Chess
Championships in 1989 and 1990. These were organized by the CSVN
(Computer Chess Association Netherlands).
In 1989 there were 14 programs and I was 11th with 2.5 points out of 7.
in 1990 there were 16 programs and I was 10th with 3 points out of 7.
After this I stopped programming for a while.
======================================================================
MacChess 1.0 Rotterdam December 1994
In April 1993 I began converting TOBBER to an Apple Macintosh.
MacChess 1.0 is nearly identical to TOBBER (Atari). On a Classic II
MacChess 1.0 is comparable to the Kasparov TEAM-MATE chess computer
and on a Centris 610 to the Mephisto MMII.
MacChess 1.0 was developed in THINK C,
the interface has been written in C and
its search routines were written in assembler.
In October 1994 I visited the 14th Dutch Computer Chess Championship
and was inspired to play again at the 15th Championship in 1995.
======================================================================
MacChess 2.0 Rotterdam December 1995
In November 1995 I entered the 15th Open Dutch Computer Chess Championship.
There were 20 programs and I was 12th with 5.5 points out of 11 games.
MacChess ran on a Macintosh Centris 610 (20 MHz).
This was the best result to date.
MacChess 2.0 was tactically improved by using null-moves and better
move ordering techniques.
Positional play and end games are still weak.
======================================================================
MacChess 2.5 Rotterdam June 1996
I slightly improved the chess engine, and made many enhancements in the
user interface and import/export facilities. The only changes between
MacChess 2.5 and 2.5.1 were some minor bug fixes.
Major New features:
- Sliding pieces
- selectable board patterns & a new piece set
- PGN/EPD import/export
- separate mating module
- batch position analysis.
- greatly enhanced game review capabilities
======================================================================
MacChess 3.0 Rotterdam December 1996
I entered the 16th Open Dutch Computer Chess Championship this November.
MacChess placed 7th out of 20 programs with 6 points in 11 games.
MacChess ran on a 200 Mhz Power Macintosh with a 604e processor
supplied by Apple (Thanks!).
This was the best result to date. The games are in the folder DOCC 1996.
MacChess 3.0 is stronger than MacChess 2.X because it thinks much
faster - it is now PowerPC native. MacChess 3.0 runs 13 times faster
on "stock" Power Macintoshes than MacChess 2.X, which should make it a
full rating class stronger. (People who use Speed Doubler to speed up
MacChess 2.X on their Power Macintoshes will "only" double their speed
by switching to MacChess 3.0.) Though MacChess 3.0 is faster than
MacChess 2.X, it isn't much "smarter" - positional play and end games
are still weak. MacChess 3.0 REQUIRES a Power Macintosh - if you
don't own a Power Macintosh, MacChess 2.5.1 is the version for you.
====================================================================
MacChess 4.0 Rotterdam December 1997
I participated in the 12th AEGON tournament last April. This is a large
human vs computer tournament with 100 participants, 50 humans against 50
computers. There were 6 rounds in 6 evenings. Unfortunately, the computer
provided was a slow one - only 51,000 nps from the opening position -
about 1/3 the speed of a 180MHz 604e. MacChess came in 67th place with
2.5 points and a TPR (tournament performance rating) of 2222.
Despite my intentions the playing strength of MacChess 4.0 is not much
improved. There is a slight improvement in end games by adding some end
game knowledge. I will keep working to improve the playing strength in
the next few years.
Major New features:
- Analyze Game
- Analyze Player vs Player
- Display of ECO codes
- More endgame knowledge
- Copy and Paste:
- PGN game when the Moves window is active.
- EPD position when the Board window is active.
- Copy the principal variation when the PV window is active.
- Next Best Move - (Option menu) Does all moves now.
- Can now work in the background
- PGN database now kept open while viewing games
- PGN player names now displayed on border of Board window
- Added Save Game As - (File menu)
- Player Name - (Option menu) Fill in and/or save a players name.
- Web Site: http://members.aol.com/Macchess/
====================================================================
MacChess 5.0 Rotterdam December 1998
MacChess did not participate in any tournaments this year.
Most of this year's work was to make the code more compact,
add endgame knowledge, a large board and other interface improvements.
Major New features:
- Added new large board with optimized "Classic" and "American" sets
- New move generator - 200Kb smaller, fast at finding forced mates
- Many Level options added, including sudden death and increment
- Quick level settings added in Level menu
- No longer settles for the first mate it sees - seeks fastest mate
- More endgame knowledge
- Preferences dialog box was split into two panes
- Dialog box for "Setup" now repositionable
- Result in Game Info box now uses popup menu
- New icons for game, opening book, preference files
- Display of nodes will no longer overflow
- Web Site: http://members.aol.com/Macchess/
====================================================================
MacChess 5.0.1 Rotterdam January 1999
Minor update.
1. Fixed the adjustment for mate scores in the transposition table.
Because of this MacChess 5.0 (not 4.0) announced a shorter mate
than was possible in some positions.
2. Add an extra “Tournament” level option that let you choose between:
a. set the time separate for white and black. (as in MacChess 5.0)
b. set the time for both colors at once. (new)
====================================================================
Wim van Beusekom.
postal address: Hammarskjoldplaats 284
3069 RH Rotterdam.
The Netherlands.
email address: beusekom@knoware.nl