Historical clue formulations

• Kingdoms — 2025-08-05
• Dimensions — 2020-01-05
• Kingdoms — 2018-02-05
• Worlds — 2017-12-19
• What kings rule — 2009-08-16
• Kings' lands — 2007-09-23
• Spheres — 2005-08-26
• Spheres — 2005-06-04
• Spheres — 1999-08-22
• Dominions — 1997-05-18
• Empires — 1996-06-06