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'''[[Main Page|Home]] * [[Organizations]] * ChessOK'''

a brand name for '''Convekta Ltd.''', a [https://en.wikipedia.org/wiki/Moscow Moscow] based chess software company headed by founder [[Victor Zakharov]] <ref>[http://chessok.com/files/bobpawlak/Articles/Victor_Zakharov_a.html ChessAssistance.com A talk with Victor Zakharov, head of Convekta development, part a] by [[Robert Pawlak]], February 02, 2003</ref> <ref>[http://chessok.com/files/bobpawlak/Articles/Victor_Zakharov_b.html ChessAssistance.com A talk with Victor Zakharov, head of Convekta development, part b] by [[Robert Pawlak]], February 14, 2003</ref> and [[Sergey Abramov]] <ref>[http://ca.chessok.com/Articles/046_Sergey_Abramov.html ChessAssistance.com About Sergey Abramov, head of business operations at Convekta] by [[Robert Pawlak]], September 17, 2004</ref>. ChessOK traces back to 1988 when the development of [[Chess Assistant]] started <ref>[http://chessok.com/?page_id=262 About - ChessOK.com]</ref>. ChessOK is operating [[Chess Server|Playing Zones]] to play chess online, and offers articles and free online services, such as probing [[Nalimov Tablebases]] <ref>[http://chessok.com/?page_id=361 Endgame Nalimov Tablebases Online - ChessOK.com]</ref>, an [[Opening Book|Opening tree]] <ref>[http://chessok.com/?page_id=352 Opening Tree Mode - ChessOK.com]</ref> and game broadcasts <ref>[http://chessok.com/?page_id=139 Tournaments & Broadcasts - ChessOK.com]</ref>.

* [http://www.talkchess.com/forum/viewtopic.php?t=32872 New Chess Course software by ChessOk] by [[Albert Silver]], [[CCC]], February 24, 2010

* [http://www.talkchess.com/forum/viewtopic.php?t=47768 Complete 7-piece tablebases are out!] by [[Albert Silver]], [[CCC]], April 12, 2013 » [[Lomonosov Tablebases]]

* [http://www.talkchess.com/forum/viewtopic.php?t=48729 Chess King and Peshk@ with external WB/UCI engines] by [[Norbert Raimund Leisner]], [[CCC]], July 23, 2013