WBEC Ridderkerk

I can’t recall when I started to use chess engines without own interface. But I know WBEC Ridderkerk was already there, a source for all winboard engines and huge engine tournaments. The tournaments wasn’t a kind of scientific work like modern ratinglists, they where a real event. Programmers where proud to take part and supported Leo with necessary options and bugfixes. Leo always respected not just the best engines but also the weak ones and gave them much attention. C0mputer chess wouldn’t be the same without Leo, he motivated programmers, gave them webspace and competition. I learned to know Leo when I started with my UCI engine webpages, and he was always a helpful and kind person, also to “competing” webmasters. In 2014 he stopped his tournaments because the mass of clones and derivates made him lose the pleasure. But he already struggled with cancer for nearly two years at this time.

Leo lost his final battle two weeks ago.

We will keep him in fond memory.

Schach der Großmeister

Unfortunately only in german:

“Schach der Großmeister” is a legendary german TV show where 2 Grandmasters played a live game commented by Vlastimil Hort and Helmut Pfleger. I found this now on youtube and watched some of them. It is also very interesting in matters of computerchess history. You can see Ossi Weiner commenting the games with help of Mephisto units and later Matthias Wüllenweber with help of Chessbase and Fritz, Gerd Isenberg with Isichess and Frederic Friedel.

If you have 42h of free time watch it here:

Chess960 League A

ChessGUI / 8RR / 3min+2sec / Ponder off / 128MB / 4-men EGTB / 2,13GHz
  1. Critter 1.6a             111.5 / 120
  2. Stockfish 3              100.5 / 120
  3. IvanHoe 9.46h             95,5 / 120
  4. Chiron 1.5                86,0 / 120
  5. Shredder 12               75,5 / 120
  6. HIARCS 13.2               70,5 / 120
  7. Spike 1.4                 68,0 / 120
  8. Deep Sjeng WC 2008        55,0 / 120
  9. EXchess 7.02b             44.5 / 120
  10. Jonny 4.0                 40,0 / 120
  11. GNU Chess 5.5             40.0 / 120
  12. Fruit 2.3.1               39.5 / 120
  13. Tornado 4.88              37,0 / 120
  14. Bright 0.5c               36,0 / 120
  15. Frenzee 3.5.19            31,5 / 120
  16. Naum 2.2                  29.0 / 120

Chess960 League B

ChessGUI / 8RR / 3min+2sec / Ponder off / 128MB / 4-men EGTB / 2,13GHz
  1. Frenzee 3.5.19            91,0 / 120
  2. Naum 2.2                  82,5 / 120
  3. Alfil 13.1                76,5 / 120
  4. Nebula 2.0                73,0 / 120
  5. The Baron 2.23            67,0 / 120
  6. Movei 0.8.438             66,5 / 120
  7. Daydreamer 1.75           63,5 / 120
  8. Hermann 2.8               59,0 / 120
  9. DanaSah 5.00              58,5 / 120
  10. Pharaon 3.5.1             55,0 / 120
  11. Ufim 8.02                 52,0 / 120
  12. Amyan 1.72                51,5 / 120
  13. Hamsters 0.7.1            47,0 / 120
  14. SlowChess 2.960e          46,5 / 120
  15. Gothmog 1.0               43,5 / 120
  16. TJchess 1.1               27,0 / 120

Chess960 League C

ChessGUI / 8RR / 3min+2sec / Ponder off / 128MB / 4-men EGTB / 2,13GHz
  1. TJchess 1.1               81,0 / 104
  2. LittleThought v1.052      77,5 / 104
  3. Hussar 0.4                77,5 / 104
  4. Betsy 6.51                73,5 / 104
  5. Patzer 3.80               72,5 / 104
  6. AICE 0.99.2               72,5 / 104
  7. Chispa 4.0.3              66,5 / 104
  8. Kurt 0.9.2                51,0 / 104
  9. Homer 1.02                49,5 / 104
  10. BigLion 2.23x             33,5 / 104
  11. Sjaak 524                 30,0 / 104
  12. FireFly 1.42              17,0 / 104
  13. Roce 0.0390               16,0 / 104
  14. Pulsar 2009-9b            10,0 / 104

SlowChess 2.960e

Hopefully the final release :-)

At startup SlowChess now calculates the estimated strength on the hardware it is actually running, that means the maximum ELO level is the estimated strength of the unleashed SlowChess. If you use very slow hardware and the engine startup takes too much time, let me know. There are no changes in the chessplaying parts, if you run a tournament there is no need to update.

Download SlowChess 2.960e.7z (728kB)
Download SlowChess 2.960e.zip (1009kB)

SlowChess 2.960e

Is based on SlowChess 2.96 by Jonathan Kreuzer: http://www.3dkingdoms.com/chess/slow.htm

Many thanks to Jonathan Kreuzer for sharing his wonderful engine and the clear and easy to understand source code.

Modifications:

UCI_ELO feature: It is possible to set ELO values between 1200 and the maximum strength on your hardware. They are very good tuned compared to the old SSDF values which are supposed to be very close to the human values. Thousands of testgames where played against emulations of dedicated computers between ELO 1400 and 2400, please take also a look at Results.txt.

Chess960: Chess960 should work as Winboard and as UCI engine under ChessGUI, Arena, Shredder and Fritz, as Winboard Engine under Winboard. Under ChessGUI chose the AHah_KxR option. As Winboard Engine you can set the hash size in megabytes from the command line: SlowChess2960.exe -H48. Supported values are 6, 12, 24(default), 48, 96, 192. Anything in between is set to the closest lower value.

The evaluation is exactly the same as the original version except of a modification of the castling evaluation in Chess960, and I am happy that I didn’t slow it down, in fact the new version is even slightly faster because of a few simplifications.

Bugs

SlowChess2.960 is completely bugfree. If something is going wrong it is your own fault or a it is a bug of the UI. Feel free to contact me if you want to prove me wrong.

Source Code

I decided not to release the source code, this is fine with the original Copyright notice. If you want to see the sources or have questions about my changes feel free contact me.

Copyright

You are allowed to distribute this program as freeware as long as the original files remain unchanged. Any commercial utilisation is not allowed without written permission of the authors. There is no warranty of any kind given or implied. The usage of Slowchess 2.960 is completely at your own risk. Please note also the Copyright notice of SlowChess 2.96.

(C) 2013 Alexander Schmidt