Historical clue formulations

• Facing difficulty — 2017-11-07
• Stuck — 2015-12-15
• Facing big trouble — 2013-01-30
• Stuck — 2011-11-15
• Stuck — 2008-04-27
• Stuck — 2004-05-28
• Stuck — 2001-06-12
• Stuck — 2001-04-10
• Embarrassingly stuck — 2001-01-22
• Stuck — 1999-09-02