Editing GNU Chess (section)

== History ==
The first version of GNU Chess was written by Stuart Cracraft. Having started in 1984 in collaboration with [[Richard Stallman]] prior to his founding of the [[GNU Project]], GNU Chess became one of the first parts of GNU.{{Citation needed |date=June 2019}}

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.<ref>{{Cite web |last=Cracraft |first=Stuart |date=October 10, 1999 |title=GNU Chess 5 |url=https://groups.google.com/g/gnu.chess/c/UGpLeswpTSU/m/5UtPTsLqhB8J |website=[[Google Groups]]}}</ref>

In 2011, GNU Chess transitioned to version 6, which is based on Fabien Letouzey's [[Fruit (software)|Fruit 2.1 chess engine]].  According to [[Chess Engines Grand Tournament|CEGT]]<ref>{{cite web|url=http://www.husvankempen.de/nunn/40_40%20Rating%20List/40_40%20All%20Versions/rangliste.html|archive-url=https://web.archive.org/web/20110308175817/http://www.husvankempen.de/nunn/40_40%20Rating%20List/40_40%20All%20Versions/rangliste.html|archive-date=2011-03-08|title=The CEGT rating list}}</ref> version 5.60 of this code base is stronger than Fruit 2.3, the latest version of that chess engine.