ChessterfieldCL/EN Download
Experimental WinBoard Chess Engine Written by M. Lüscher


What you should know about ChessterfieldCL/EN
  • ChessterfieldCL is an experimental chess engine with many known shortcomings concerning playing strength
  • There is NO graphical user interface and you must download WinBoard to use ChessterfieldCL
  • There is a probably unique evaluation function (German description, English description) that is based on a simplified neural network
  • ChessterfieldCL has learned ALL its positional chess knowledge from games played against other WinBoard engines and from analysing some endgame databases
  • You can use ChessterfieldEN to train ChessterfieldCL with your own chess games

 
ChessterfieldCL - WinBoard Engine
Version
Date
(New) Features
WIN95/98/NT:
i4 (482 KB Zip file)
DOWNLOAD*)
March 2000
- Evaluation function based on a simplified neural network
- Most of the WinBoard commands supported
WIN95/98/NT:
i4b (482 KB Zip file)
DOWNLOAD *)
March 2000
- Bugfix: Version i4 had the feature "crash if level 0 5 0";
Version i4b can no longer offer this feature :-)

 
ChessterfieldEN - Learning Utility
Version
Date
Compatibility
WIN95/98/NT:
i4 (376 KB Zip file)
DOWNLOAD *)
May 2000
Compatible with 
ChessterfieldCL i4, i4b

 
ChessterfieldCL - "Knowledge Updates"
Provider / Version
Date
Compatibility
John T. Grant
jtg_sept00 (374 KB Zip file)
DOWNLOAD *)
September 2000
Compatible with 
ChessterfieldCL i4, i4b
Arturo Ochoa
ChessterfieldCLi5a_2600 (348 KB Zip file)
DOWNLOAD *)
February 2001
Compatible with 
ChessterfieldCL i4, i4b, i5a (unofficial)
"Knowledge Updates" are new network.dat files which you can use as a replacement for your old network.dat file located in the directory where you have installed ChessterfieldCL.
Many thanks to every contributor of a new network.dat file!!

 
Chessterfield - Source Code
Version
Date
(New) Features
src_010901 (737 KB Zip file)
DOWNLOAD *)
License
January 9, 2001
- First official release of the source code
Endgames (6837 KB Zip file)
DOWNLOAD *)
January 9, 2001
- Files needed to perform endgame learning

 
 
More Information
Michael Buro presented in his paper "From Simple Features to Sophisticated Evaluation Functions" a practical framework for the semi-automatic construction of evaluation functions for games. Since his approach was very successful in the domain of Othello, we wanted to know, whether a similar approach could be used for the domain of computer chess. The result of this investigation is presented on this page. You are also welcome to read the text that I have written about this work. The title of the text is "Automatisierte Generierung einer Bewertungsfunktion für Schachendspiele". Because there are a lot of English speaking chess programmers I have tried to translate the German document: "Automatic Generation of an Evaluation Function for Chess Endgames". 

 

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*)  1. The Chessterfield chess program is freeware.
2. There is absolutely no warranty for the program and all its additional files.
3. The entire risk as to the quality and performance of the program is with you.
4. You may give ChessterfieldCL to your friends, as long as you don' t charge a fee.
5. There is no support for this program.
6. Please report bugs to: m.luescher@datacomm.ch. Other comments are also welcome.