Historical clue formulations

• Like pen smudges — 2025-11-24
• Pac-Man ghost with the shortest name — 2025-07-03
• Completely black, as the sky — 2023-12-30
• Like a leaky pen — 2023-11-05
• Black as night — 2023-02-04
• Jet — 2022-09-10
• Like a stamp pad — 2022-01-27
• Stained, in a way — 2021-08-05
• Black — 2021-02-21
• Like presses — 2021-01-23
• Black — 2019-09-15
• Extremely dark — 2017-09-22
• Pitch-black — 2016-06-22
• Pitch-black — 2015-08-04
• Jet-black — 2015-02-16
• One of the Pac-Man ghosts — 2011-01-02
• Black — 2010-12-16
• Black — 2010-09-28
• Black as night — 2009-01-24
• Like a starless sky — 2007-10-17
• Jet black — 2004-11-17
• Pitch-black — 2004-04-10
• Black — 2003-12-17
• Deep black — 2003-04-27
• Black — 2003-01-09
• Black — 2000-05-14
• Pitch-dark — 1999-07-04
• Blackened — 1998-12-06
• Black — 1998-11-08
• Very dark — 1997-12-12
• Black — 1997-10-09
• Black and wet — 1997-09-18
• Black — 1997-07-27
• Black — 1997-05-10
• Like an octopus's defense — 1997-04-02
• Like an octopus's defense — 1997-02-12
• Very dark — 1996-11-28
• Black — 1996-11-03
• Like printers' fingers — 1996-02-26