Historical clue formulations

• Crosses (out) — 2026-09-21
• Kisses, symbolically — 2026-09-07
• Spot markers — 2025-07-06
• Check mark alternatives — 2024-12-20
• Strikes (out) — 2024-10-06
• Spot markers — 2024-04-04
• Kisses, symbolically — 2022-11-04
• Marks, as a ballot — 2022-08-14
• Important markings on treasure maps — 2022-04-05
• Marks, as a survey box — 2021-11-19
• Critical marks on treasure maps — 2021-05-17
• Check alternatives — 2021-04-23
• Deletes, with "out" — 2020-09-06
• Strikes (out) — 2020-05-11
• Deletes, with "out" — 2020-02-23
• Marks out — 2019-12-15
• Crosses out — 2019-02-21
• Treasure map markers — 2018-08-26
• Poison indicators, on bottles — 2015-09-03
• Crosses (out) — 2015-05-04
• Marks (out) — 2014-05-18
• Pair of Dos Equis — 2014-04-11
• Marks of good bowlers — 2014-02-12
• One side in some chalk talks — 2014-01-18
• Marks of illiteracy — 2013-12-18
• Ballot marks — 2013-07-29
• Deletes, with "out" — 2011-06-27
• Ballot marks — 2011-06-13
• Marks (out) — 2010-01-13
• Crosses (out) — 2009-11-03
• Choice marks? — 2009-03-05
• Ballot marks — 2008-11-03
• Illiterates' marks — 2008-10-27
• Scratches, with "out" — 2008-09-19
• Crosses out — 2008-08-11
• Kisses, on paper — 2008-07-06
• Strike marks — 2008-03-28
• Indications of good bowling — 2008-02-23
• Marks (out) — 2007-11-22
• Ballot markings — 2007-06-21
• Deletes, with "out" — 2007-05-29
• Crosses (out) — 2006-09-11
• Illiterates' signatures — 2006-01-04
• Frame fillers in a perfect bowling game — 2005-12-15
• Marks (out) — 2005-11-13
• Deletes, with "out" — 2005-07-17
• Crosses (out) — 2005-06-27
• Scoresheet marks — 2003-10-18
• Crosses (out) — 2003-09-03
• Illiterates' marks — 2002-10-01