HYDRAS
| Date | Clue |
|---|---|
| 2025-12-10 | Greek figures with multiple heads |
| 2021-12-28 | Mythical Greek monsters |
| 2018-08-12 | Tiny, multitentacled creatures |
| 2016-06-05 | Jellyfish relatives named for a mythological monster |
| 2009-09-30 | Many-headed serpents |
| 2008-02-16 | Many-sided problems |
| 2002-07-19 | Tentacled sea creatures |
| 2000-01-09 | Many-sided problems |