Psion

a former commercial chess program developed by Richard Lang as successor of his first program Cyrus. In about 1983 Lang started to write his new program for 68000 based processors in assembly language, when he was about to abandon the work for Intelligent Software, who owned the Cyrus brand name. Psion was first marketed by Sinclair Research for [|Sinclair QL] and later under [|Psion's] own label for 68000 based Apple Macintosh and Atari ST homecomputers, in late 1983 ported to 8086 based PCs running under the MS-DOS operating system. Psion was the shared winner of the WMCCC 1984, and also won the Software Event of the WMCCC 1987. Richard Lang's early Mephisto programs, such as the WMCCC 1985 winner Mephisto Amsterdam, were based on Psion. || toc =Screen Shots=
 * Home * Engines * Psion**
 * [[image:psionchess.gif link="http://www.dosgamesonline.com/index/game/231/Psion_Chess.html"]] ||~  || **Psion** (Psion Chess),
 * Psion Chess for IBM PC, MS-DOS ||~  ||^   ||
 * [[image:275507-psion-chess-atari-st-screenshot-information-window-colour.png width="320" height="200" link="http://www.mobygames.com/game/psion-chess/screenshots"]] ||
 * Psion for Atari ST ||
 * [[image:275518-psion-chess-macintosh-screenshot-playing-on-2d-board.png width="320" height="264" link="http://www.mobygames.com/game/psion-chess/screenshots"]] ||
 * Psion for Macintosh ||
 * [[image:psionchess1.gif link="http://gamebub.com/dos_games.php?game=185&name=psion-chess"]] ||
 * Psion for IBM PC, MS-DOS, 3D screen ||
 * [[image:psionchess1.gif link="http://gamebub.com/dos_games.php?game=185&name=psion-chess"]] ||
 * Psion for IBM PC, MS-DOS, 3D screen ||

=Quotes= Quote by Kaare Danielsen from his WMCCC 1987 report

=Namesakes= According to Chris Whittington the chess software for the [|Psion 3a] [|PDA] was written by Ren Wu. A further Psion Chess program for [|Psion Series 3] and [|Psion Siena] [|PDAs] was written by Johan Van Barel in C.

=Publications=
 * Tony Harrington (**1984**). //Checkmate//. [|Personal Computer News], [|November 1984], [|pdf]
 * Christopher Chabris (**1987**). //[|Reviews: The Game of Kings - START's First Chess Tournament]//. [|STart Vol. 2, No. 2]

=External Links=
 * [|Psion's ICGA Tournaments]
 * [|Youtube video : Psion 2.00 on the Atari Stacy 2]
 * [|Sinclair QL Computer Wiki - Psion Chess]
 * [|Psion Chess] from [|MobyGames]
 * [|Psion Chess from Wikipedia.de] (German)
 * [|Psion] from [|Schachcomputer.info Wiki] (German)

=References= =What links here?= include component="backlinks" page="Psion" limit="40"
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