Historical clue formulations

• First and last black key on a standard piano — 2018-08-26
• B flat equivalent — 2016-10-30
• Note in the B major scale — 2016-07-24
• Note in B major but not E major — 2015-05-16
• It's almost a B, scorewise — 2008-01-25
• Black key — 2008-01-16
• B flat, enharmonically — 2007-11-22
• Part of a B major scale — 2006-12-01
• Whiz kid's musical key? — 2004-10-21
• Whiz's musical key? — 2004-02-01
• Equivalent to B flat — 2000-03-06
• Note in the B major scale — 1998-08-16
• B flat's equivalent — 1997-03-02
• Common key — 1996-08-04
• B flat equivalent — 1995-04-24
• It sounds like B flat — 1994-01-20