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[[FILE:OssiWeiner1985.JPG|border|right|thumb|Ossi Weiner <ref>[[László Lindner]], A SZÁMÍTÓGÉPES SAKK KÉPEKBEN című melléklete - The pictures of the Beginning of Chess Computers</ref> ]]

a German graduate engineer, chess player, computer chess expert, co-author of computer chess books, [[Opening Book]] [[:Category:Opening Book Author|author]], and computer chess and games businessman and distributor. Weiner was consultant of [[Hegener & Glaser]] <ref>[[Tony Harrington]] ('''1983'''). ''A Match for Brute Force''. [[Personal Computer World]], [http://www.chesscomputeruk.com/html/publication_archive_1983.html May 1983], [http://www.chesscomputeruk.com/PCW_May_1983.pdf pdf]</ref>, representing [[Mephisto]] chess computers at various [[World Computer Chess Championship|World Computer]] and [[World Microcomputer Chess Championship|World Microcomputer Chess Championships]], yielding in long term cooperation with [[Richard Lang]] and [[Ed Schroder|Ed Schröder]]. In 1983, Weiner founded his own company, the ''Hobby Computer Centrale, Weiner Vertriebs GmbH'' in Munich, which was the forerunner of the [[Millennium 2000 GmbH]], founded 1996 together with his partner [[Manfred Hegener]] <ref>[http://www.millennium2000.de/ Millennium 2000]</ref> . Millennium 2000 further distributed the World Champion chess programs [[Shredder]] by [[Stefan Meyer-Kahlen]], and after [[Marty Hirsch|Marty Hirsch's]] problems <ref>[http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/5640d2b98af5e5fa# EUROCHESS cheated Marty Hirsch out of $35,000 according to Marty Hirsch] thread from [http://groups.google.com/group/rec.games.chess.computer/topics rec.games.chess.computer], Marty's post (19), February 24, 1997</ref> with his former distributor [[Martin Stamer]] his program [[MChess|MChess Pro]]. In 2003, Millennium discontinued the high end computer chess software sector to focus on their core business, [[Dedicated Chess Computers|chess computers]], electronic games and consumer products. According to [[Hein Veldhuis]], the computers of Millennium 2000 are produced by [[Eric White]], while [[David Levy]] is responsible for the programs <ref>[http://www.schaakcomputers.nl/hein_veldhuis/database/files/Millennium%20information.pdf De firma Millennium 2000 GmbH Hegener & Weiner in vogelvlucht] by [[Hein Veldhuis]], Dutch and German pdf </ref>.