The Harnic Astrology program takes a fully functional and richly detailed Earth-based Astrology Program ("SymSolon") (GNU) and changes the parameters to produce output appropriate for the Harnic Isles and the planet (solar system) of Kethira.
This article provides HârnMaster rules for the tournament events mentioned in the Tournaments (#4721) and Olokand Castle (#5618) articles, available from Columbia Games Inc. by Bill Gant
