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a British computer chess expert, journalist, since from 1985 until 2013 editor and producer of the [[Periodical|computer chess periodical]] [[Selective Search]], merchant of computer chess and bridge computers, games and accessories, and as [[Opening Book Authors|opening book author]] and tester member of the [[HIARCS]] team <ref>[https://www.game-ai-forum.org/icga-tournaments/person.php?id=18 Eric Hallsworth's ICGA Tournaments]</ref> <ref>[http://www.hiarcs.com/pc_hiarcs_9_0.htm PC HIARCS 9.0 Computer Chess Software Program]</ref> <ref>[http://www.hiarcs.net/forums/viewtopic.php?t=1997 Eric Hallsworth] by Ted Summers, [[Computer Chess Forums|HIARCS Forum]], December 14, 2008</ref>.