Editing HIARCS (section)

==History==
The first version of HIARCS was written in 1980 in PDP-11 [[BASIC|Basic]], when Mark Uniacke was only 15 years old. Subsequent versions were also written in interpreted Basic, which meant that the program was rather slow. To compensate for this, Mark developed some heuristics to guide the program's search and evaluation in a more 'targeted' way.<ref>{{cite web|last=Uniake|first=Mark|title=Where It All Began|url=http://www.hiarcs.com/beginning.htm|accessdate=25 October 2013|archiveurl=https://web.archive.org/web/20131021225906/http://www.hiarcs.com/beginning.htm|archivedate=21 October 2013}}</ref><ref>{{cite web|last=Uniake|first=Mark|title=Now Walking|url=http://www.hiarcs.com/nowwalking.htm|accessdate=25 October 2013|archiveurl=https://web.archive.org/web/20131021205717/http://www.hiarcs.com/nowwalking.htm|archivedate=21 October 2013}}</ref> This resulted in a program that relied on positional algorithms, rather than search depth.<ref>Christian Kongsted, ''How to Use Computers to Improve Your Chess'' (London: Gambit Publications, 2003), p. 111.</ref>

At the end of the 80s, HIARCS was rewritten in C, and soon competed in computer chess tournaments. In 1991, Hiarcs went commercial and Hiarcs 1.0 was released for PCs and the [[MS-DOS]] operating system.<ref>{{cite web|last=Uniake|first=Mark|title=Free HIARCS Chess Software Programs|url=http://www.hiarcs.com/freechess.htm|accessdate=25 October 2013|archiveurl=https://web.archive.org/web/20131021230305/http://www.hiarcs.com/freechess.htm|archivedate=21 October 2013}}</ref> In 1996, Hiarcs 4.0 became the first version to be marketed by [[ChessBase|Chessbase]] sold inside the [[Fritz (chess)|Fritz]] GUI.

Version 11, the first version to support [[multiprocessing]], was released in December 2006. HIARCS 12.1 and 13 are the engines in [[Pocket Fritz]] by Chessbase.<ref name=milestones /><ref name="pocket">{{cite web|url=http://www.grailmaster.com/misc/chess/comp/chessrev/chessreview.html|title=Chess Programs for Pocket PC and Palm devices|access-date=2007-08-24|url-status=dead|archive-url=https://web.archive.org/web/20120327022639/http://www.grailmaster.com/misc/chess/comp/chessrev/chessreview.html|archive-date=2012-03-27}}</ref> Since Version 14, released in August 2012, HIARCS has been sold along with its own [[GUI]] (Chess Explorer) available on Mac OS X and Windows.<ref>{{cite web|title=HIARCS Chess Explorer|url=http://www.hiarcs.com/chess-explorer.htm|publisher=HIARCS}}</ref>