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a German chess player, chess collector and former chess programmer. While affiliated with [[VEB Mikroelektronik Erfurt|VEB Mikroelektronik „Karl Marx“ Erfurt]], Wolfgang Pähtz was involved in the development of the the [[Chess-Master#ChessMasterDiamond|Chess-Master Diamond]], responsible for the dedicated [[User Interface|user interface]] and [[Opening Book|opening book]] <ref>[https://www.schach-computer.info/wiki/index.php/Chess-Master_Diamond Chess-Master Diamond] from [https://www.schach-computer.info/wiki/index.php/Hauptseite_En Schachcomputer.info Wiki] (German)</ref>, and ported the Chess-Master program to run on a [https://en.wikipedia.org/wiki/KC_85 KC 85/2] [https://en.wikipedia.org/wiki/Personal_computer personal computer] (an [[Amstrad CPC]] clone) as [[Chess-Master#VideoChessMaster|Video Chess-Master]]. Wolfgang Pähtz, brother of [https://de.wikipedia.org/wiki/Thomas_P%C3%A4htz Thomas Pähtz], is uncle of the German chess Woman Grandmaster [https://en.wikipedia.org/wiki/Elisabeth_P%C3%A4htz Elisabeth Pähtz] <ref>[http://www.schachmuseum.com/neu-im-schachmuseum/wolfgang-pahtz-ist-neuer-gsm-vorsitzender Wolfgang Pähtz ist neuer GSM-Vorsitzender - Deutsches Schachmuseum]</ref>.