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'''Ulf Rathsman''',<br/>
a Swedish engineer and former professional computer chess programmer. He started chess programming in the 70s, and his first program [[Dark Horse]], written in [[Fortran]] and running on a [[CDC 6600]] [https://en.wikipedia.org/wiki/Mainframe_computer mainframe computer] <ref>[[Peter Jennings]] ('''1978'''). ''Microchess 1.5 Versus Dark Horse''. [[Byte Magazine#BYTE303|BYTE, Vol. 3, No. 3]]</ref> and also on a 36-bit one's complement [[UNIVAC 1100]] <ref>[https://www.game-ai-forum.org/icga-tournaments/tournament.php?id=68 3rd World Computer Chess Championship - Linz 1980 (ICGA Tournaments)]</ref>, played the [[WCCC 1977]] in [https://en.wikipedia.org/wiki/Toronto Toronto], the [[WCCC 1980]] in [https://en.wikipedia.org/wiki/Linz Linz] respectively <ref>[https://www.game-ai-forum.org/icga-tournaments/program.php?id=426 Dark Horse' ICGA Tournaments]</ref>, and was runner-up at the [[ECCC 1979]].
=Photos=
[[FILE:HjoerthRathsman.jpg|none|border|text-bottom|570px]]
[[Lars Hjörth]], [[David Kittinger]], [[Kaare Danielsen]], [[Ulf Rathsman]], [[WMCCC 1985]] Amsterdam <ref>[[László Lindner]], A SZÁMÍTÓGÉPES SAKK KÉPEKBEN című melléklete - The pictures of the Beginning of Chess Computers</ref>
=Programs=
