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'''[[Main Page|Home]] * [[Chess]] * Chess Query Language'''
The '''Chess Query Language''' (CQL) is a structured [https://en.wikipedia.org/wiki/Query_language query language] to search for games, problems, and studies that match specific themes from a collection in [[Portable Game Notation]]. CQL was developed by [[Gady Costeff]] and [[Lewis Stiller]]. It is Copyright (c) 2003-2019 2021 and is free. The current version is '''6.01''' and the documentation and download of the executable can be found on the website of Gady Costeff <ref>[http://www.gadycosteff.com/cql/index.html CQL Introduction] by [[Gady Costeff]]</ref>.
=Sample query=
=Publications=
* [[Gady Costeff]] ('''2004'''). ''The Chess Query Language: CQL''. [[ICGA Journal#27_4|ICGA Journal, Vol. 27, No. 4]], [http://gadycosteff.com/chess_query_language.pdf pdf]
* [[Miha Bizjak]], [[Matej Guid]] ('''2021'''). ''Automatic Recognition of Similar Chess Motifs''. [[Advances in Computer Games 17]]
=Forum Posts=
