Historical clue formulations

• Greatest extent — 2018-10-04
• Level best — 2016-07-16
• Nth degree — 2016-03-15
• Maximum — 2015-06-14
• Absolute maximum — 2013-02-12
• Maximum — 2005-11-16
• Maximal — 2005-07-23
• Maximum extent — 2002-03-18
• Level best — 2000-08-05
• Maximum — 1999-06-13
• Nth — 1995-08-11