Historical clue formulations

• Trades — 2018-08-28
• Quid-pro-quo arrangements — 2013-07-11
• Alternatives to sales — 2012-02-10
• Pulls the switch? — 2011-02-05
• Racehorse whose 1955 Kentucky Derby win kept Nashua from taking the Triple Crown — 2010-03-26
• Trades — 2010-03-23
• Pulls the switch? — 2003-11-14
• Gives and takes — 2000-12-17
• Makes a switch — 2000-11-16
• Substitutes — 1999-05-02
• Baseball card deals — 1998-06-12
• Trades — 1997-06-26
• 1955 Kentucky Derby winner — 1996-10-10
• Exchanges — 1996-07-22