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'''SciSys Explorer''', (Explorer Chess)<br/>
along with '''Olympiade''', '''Companion II''' and , '''Concord I, II''' and '''Electronic Chess Mark 8''', a series of [[Saitek|SciSys]] [[Dedicated Chess Computers|dedicated chess computers]] released from 1983 to 85. The computers had the [https://en.wikipedia.org/wiki/Hitachi Hitachi] [[6800|HD6301V1]] [https://en.wikipedia.org/wiki/Microcontroller microcontroller] with 4 Kibi [[Memory#ROM|ROM]] and 256 byte [[Memory#RAM|RAM]] in common, running the [[6800]] branch of the [[LogiChess]] program by [[Kaare Danielsen]] at a [https://en.wikipedia.org/wiki/Clock_rate clock frequency] of 3.6 resp. 7.2 MHz.
A model similar to the Companion II was sold by [https://en.wikipedia.org/wiki/RadioShack RadioShack] as ''Tandy 1650'' <ref>[https://www.schach-computer.info/wiki/index.php/Tandy_1650 Tandy 1650] from [https://www.schach-computer.info/wiki/index.php/Hauptseite_En Schachcomputer.info Wiki]</ref>.
The SciSys Explorer was Danielsen's '''first''' commercial LogiTech release <ref>[https://www.schach-computer.info/wiki/index.php/Danielsen,_Kaare Danielsen, Kaare] from [https://www.schach-computer.info/wiki/index.php/Hauptseite_En Schachcomputer.info Wiki]</ref>,
* [http://www.chesscomputeruk.com/html/olympiade.html Olympiade] from [http://www.chesscomputeruk.com/index.html Chess Computer UK] by [[Mike Watters]]
* [http://www.chesscomputeruk.com/html/electronic_chess_mark_8.html Electronic Chess Mark 8] from [http://www.chesscomputeruk.com/index.html Chess Computer UK] by [[Mike Watters]]
* [https://www.schach-computer.info/wiki/index.php/SciSys_Electronic_Chess_Mark_8 SciSys Electronic Chess Mark 8] from [https://www.schach-computer.info/wiki/index.php/Hauptseite_En Schachcomputer.info Wiki] (German)
* [https://www.schach-computer.info/wiki/index.php/Tandy_1650 Tandy 1650] from [https://www.schach-computer.info/wiki/index.php/Hauptseite_En Schachcomputer.info Wiki] (German)
