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Contest news
(March 14)
After 2½ months of intensive testing we report that nobody was able to find a stronger
personality in CATEGORY-I (playing games).
Sometimes engine-engine matches started very promising but after more games the
balance ended in favor of the default settings of Rebel Century.
Having done many of these experiments ourselves lately Rebel Company also could not find a clear
improvement EXCEPT lowering the [Chess Knowledge] parameter to 25% which is one of the
key improvements of Rebel Century 1.2 (already available for download).
Rebel Company considers it as a pity nobody noticed that lowering the [Chess Knowledge] parameter
apparently was the key to make Rebel a stronger computer vs computer player. The classic
theme chess knowledge versus speed remains actual and needs the constant attention of
chess programmers for the near future.
Now that no prize money is given for CATEGORY-I Rebel Company feels the need to divide the
prize money in another way. We have decided to double the prizes of the 3 winners of
CATEGORY-I (tactics) Thus:
- Eric Campos, his Q3 personality scored an incredible elo of 2995! Eric receives $400.
- Jeff Lischer, his personality scored an elo of 2965, Jeff collects $200.
- Christian BONNIN, his MACHEID personality scored an elo of 2940. Christian gets
the small jackpot of $100.
Rebel Company also likes to reward 2 special personalities for playing games because they
have a very interesting playing style. During our testing we noticed that some of the
personalities people contributed changed Rebel into a brilliant chess player at some stages
of a game. It is a pity these engines in other areas of the game could not compete against the
rock solid default settings of Rebel Century.
- Marc van Hal his Alexander Alekhine personality plays brilliant chess at times. It
is a real pleasure to play against this personality. This personality plays a kind of
bluff chess, it scatters with pawns as soon as it smells your king or notices
other positional advantages. Marc receives $200.
- Howard Exner his personality for tactics is already mentioned and available for
download from the Rebel Home Page. His engine for playing games did not bad at all in the
contest and was close to a 100% score. The nice thing about this engine is its very natural,
balanced and strong attacking style. Howard receives $100.
You can now download the 2 special personalities and change your Rebel Century into an even
more attractive opponent to play against.
Download the 2 rewarded engines
This ends the REBEL CENTURY contest. Rebel Company likes to thank all who have participated
in the contest. It was a lot of fun to do.
Rebel Century 1.2
(February 4)
We have received quite a number of questions regarding the 2 new chess engine options of
Rebel Century 1.2 see also the discussions on
REBEL-BOARD
4.3.12 Fast Evaluation
"Fast Evaluation" is a specific method for computer chess.
When this option is activated, the "Rebel personality" (see "Personalities")
parameter Chess Knowledge will be set to a fixed value of 25.
If this option isn't activated, Rebel will use a more intelligent form of the Chess
Knowledge parameter. Depending on the position Rebel will use its own preferred value
of the Chess Knowledge parameter which is in the range of 25-500 for each position
even in the search. It will typically slowdown Rebel with 25-30% but the returned
analysis is more accurate making Rebel a better player against humans.
Remark: If this option isn't activated you more or less are playing against the original
Rebel Century from Cdrom PLUS all the speed-up improvements from version 1.2.
4.3.13 Fast Search
"Fast Search" is a specific method for computer chess. This engine feature will speed-up
the Rebel search process with about 25% due to a new pruning algorithm. The algorithm
has proven to be very solid and it is advised to have it active all the time.
An updated manual will be availabe soon for download.
Rebel Century 1.2
(February 1)
We managed to port the new and much stronger 10d engine (as announced below) to the
Rebel Century outlook. The update is called REBEL CENTURY 1.2 and is now available for
Century customers for free from the subscription area.
More information at this special page.
Engine news
(January 21)
Expected within a few weeks is a major engine update for REBEL-CENTURY customers. This version
is for for computer-computer lovers in the first place. Expected elo performamce gain in the computer-computer
area is at least 50 ELO points above REBEL-CENTURY and maybe even a lot more as our tests so far
indicate.
This comp-comp engine is the result of the conclusions from the
Chess in 2010 topic introduced by Rebel programmer Ed Schröder last year.
The engine is based on Rebel 10c concept but is completely rewritten. The engine will be
released in the REBEL 10 outlook as Rebel 10d.
Characteristics of Rebel 10d
- 3 times faster than Rebel Century on short times controls.
- On longer time controls version 10d typically hits 2-3 plies more than Rebel Century.
- On longer time controls (40/2:00) on a fast PC (500 Mhz) version 10d typically hits 11-13
plies average.
More info at release time. Rebel 10d will be available from the subscription area for Rebel
Century customers.
IMPORTANT to realize
Use Rebel Century for playing games and analysis, Rebel Century is more accurate in positional
understanding.
Use Rebel 10d for computer versus computer and quick blunder check, Rebel 10d is much better
in this area than the more knowledgeable Rebel Century.
For reasons of complexity it was not possible to combine version 10d and Rebel Century into
one program.
CONTEST RESULTS (tactics)
(January 12)
CATEGORY II (testing positions)
The 3 winners of PART-II of the contest are:
- Eric Campos, his Q3 personality scored an incredible elo of 2995! Eric receives $200.
- Jeff Lischer, his personality scored an elo of 2965, Jeff collects $100.
- Christian BONNIN, his MACHEID personality scored an elo of 2940. Christian gets
the small jackpot of $50.
Congratulations!
Besides testing the personalities on the provided TACTICS database we also tested the 3 winning
personalities on 2 well known sets BS2830 and LCT-II. Rebel Century's default elo is included
in the statistic. The statistic is based by running Rebel Century on a Pentium-II 266 Mhz.
PERSONALITY TACTICS BS-2830 LCT-II
Rebel Century 2450 2538 2450
Q3 2995 2717 2550
Jeff Lischer 2965 2704 2580
Macheid 2940 2672 2602
You can now download the winning personalities and change your Rebel into a tactical monster.
Download the 5 best tactical wizards
We also like to recommend the WA8 personality of Walter Anema and the EXNER
personalitity of Howard Exner. Especially the WA8 personality excels in simpleness as the
only changes to Rebel's default settings are:
[Attractiveness = 200]
[Attacking = 500]
[Search Technique = RISKY]
The WA8 and EXNER personalities score remarkable stabile:
PERSONALITY TACTICS BS-2830 LCT-II
Rebel Century 2450 2538 2450
WA8 2700 2673 2615
EXNER 2715 2699 2575
The WA8 and EXNER personalities are included in the download too. Have a lot of
tactical fun!
Release status
(October 14)
Official release Rebel Century!
Dealer shipments and private customer deliveries started!
10 reasons to buy REBEL CENTURY (all are included at the special, low price)
1. REBEL is generally accepted as the most human-like playing chess program.
2. Rebel Century chess engine is now fully user definable via so-called Personalities.
3. REBEL Subscribe: (the monthly games update is already worth the end-price).
4. Many chess engine improvements (estimated at +30 ELO) and useful features added.
5. The $2000 contest (make your own Personality)
6. Superb database including a highly qualified database of 510,000 games.
7. A brand new EOC: a chess tree of 28 million positions.
8. The best of REBEL GOLD (a former stand-alone Rebel product).
9. Century customers are offered 10% discount on the new ChessBits magazine.
10. 2 external popular programs EPD2DIAG and ECTOOL (including Rebel chess engines).
The end-user-price of Rebel Century is ONLY $39.95 and will remain valid until at least
December 31, 1999. After that we expect the price to go up again to the old level of $59.95.
This is our special way of helping you celebrate the new century early!
Release status
(October 5)
The duplication factory just informed us that the Rebel Century cdroms will be ready next
week Tuesday October 12.
Dealer shipments and private customer deliveries will start as soon as the cdroms are
in our possession.
Upgrade Policy
(September 26)
Due to the low prices of chess software nowadays Rebel Company has sharpened their
Upgrade Policy for future Rebel versions.
All details HERE
Ordering
(September 25)
Ordering pages updated. You can now order Rebel Century on-line.
Delivery of orders beginning October.
Release status
(September 24)
The Master cdrom of Rebel Century is ready to send to the duplication factory. From there
is usually takes 5-7 (working) days. It's expected you can obtain Rebel Century beginning
October from your local dealer.
Engine status
(September 23)
Programmer Ed Schroder found a (last minute) 20% overall speed-up for his REBEL. Specificly
10-15% for the end-game and 25-30% for the middle-game.
Book-learning
(September 19)
Book-learning has been made more aggressive. It will avoid that you can repeat games you
previouly have won against Rebel. A second goal is to perform better in computer-computer
play. To activate the aggressive book-learner include "B" to the command-line. More
information in the README file (menu START).
CHESSBITS
(September 17)
Included on the CENTURY cdrom is a DEMO of the ChessBits magazine (cdrom version) plus a
discount offer of 10% for Rebel Century users.
The Rebel Manual
(September 17)
The Rebel manual comes in 5 languages (english, german, spanish, french and dutch). All text
in the Rebel Century program is also available in these 5 lanuages.
Besides the build-in on-line manual in Rebel Century it-self on your CENTURY cdrom you will
find an english version in WINHELP and BROWSER format. Put the Rebel Century cdrom in your drive
(your browser will start) and then click on the corresponding screen item. For an impression
click HERE
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