Software:GNU Chess
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 GNU Chess 6.0.0 running with the XBoard front end, v. 4.1.5. | |
| Developer(s) | GNU Project |
|---|---|
| Initial release | 1984 |
| Operating system | Linux, Unix, macOS, Windows |
| Type | Computer chess |
| License | 2010[lower-alpha 1]: GPL-3.0-or-later 1992[lower-alpha 2]: GPL-2.0-or-later 1986: Chess-GPL[lower-alpha 3][1][2] |
| Website | www |
Template:Chess programming series GNU Chess is a free software chess engine and command-line interface chessboard. The goal of GNU Chess is to serve as a basis for research, and as such it has been used in numerous contexts.
GNU Chess is free software, licensed under the terms of the GNU General Public License version 3 or any later version, and is maintained by collaborating developers. As one of the earliest computer chess programs with full source code available, it is one of the oldest for Unix-based systems and has since been ported to many other platforms.
Features
GNU Chess 6.2.5 is rated at 2661 Elo points on CCRL's 40-moves-in-2-minutes list.[3] For comparison, the strongest human player, Magnus Carlsen, has achieved an Elo rating of 2882. On the same list, Fritz 8 was rated at 2665 Elo,[4] and that program in the 2004 Man vs Machine World Team Championship beat grandmasters Sergey Karjakin, Veselin Topalov and reached a draw with Ruslan Ponomariov.
It is often used in conjunction with a GUI program such as XBoard or GNOME Chess, where it is included as the default engine. Initial versions of XBoard's Chess Engine Communication Protocol were based on GNU Chess's command-line interface. Version 6 also supports the Universal Chess Interface (UCI). Since version 6.1 GNU chess supports a graphical mode for terminal emulators.
History
GNU Chess has been enhanced and expanded since. Versions from 2 to 4 were written by John Stanback. Version 5 of GNU Chess was based on the Cobalt chess engine written by Chua Kong-Sian.[5]
In 2011, GNU Chess transitioned to version 6, which is based on Fabien Letouzey's Fruit 2.1 chess engine. According to CEGT[6] version 5.60 of this code base is stronger than Fruit 2.3, the latest version of that chess engine.
See also
Notes
References
- ↑ "GNU Chess General Public License". 1986. https://opensource.apple.com/source/Chess/Chess-49/gnuchess.subproj/COPYING.
- ↑ Yigit, Ozan (1986-12-17). "yetti's Christmas/New Year goodies (gnu chess)". Newsgroup: ont.general.
- ↑ "CCRL Blitz - GNU Chess 6.25 64-bit". http://ccrl.chessdom.com/ccrl/404/cgi/engine_details.cgi?match_length=30&eng=GNU%20Chess%206.25%2064-bit.
- ↑ "CCRL Blitz - February 5, 2023". http://ccrl.chessdom.com/ccrl/404/rating_list_all.html.
- ↑ Cracraft, Stuart (October 10, 1999). "GNU Chess 5". https://groups.google.com/g/gnu.chess/c/UGpLeswpTSU/m/5UtPTsLqhB8J.
- ↑ "The CEGT rating list". http://www.husvankempen.de/nunn/40_40%20Rating%20List/40_40%20All%20Versions/rangliste.html.
External links
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