TETRAD
| Date | Clue |
|---|---|
| 2026-04-17 | Set of notes in a seventh chord |
| 2020-12-05 | Four of a kind, say |
| 2017-10-08 | Covalent bonds of a carbon atom, e.g. |
| 2017-03-08 | Group of four |
| 2013-01-27 | Foursome |
| 2009-11-07 | Four-note chord |
| 2009-09-02 | Foursome |
| 2008-05-30 | The classical elements, e.g. |
| 2006-12-02 | Monopoly's railroads, e.g. |
| 2005-04-22 | Cat's paws, e.g. |
| 2002-07-27 | The women in "Little Women," e.g. |
| 2000-02-03 | Foursome |
| 2000-01-13 | Four of a kind |
| 1999-05-03 | Foursome |
| 1998-11-29 | Foursome |