RELAYS
| Date | Clue |
|---|---|
| 2023-01-29 | Some track-and-field races |
| 2017-10-26 | 4 x 100 and others |
| 2016-09-05 | Pass-the-baton track events |
| 2016-01-24 | Pony Express riders, e.g. |
| 2015-06-08 | Track races with legs |
| 2014-02-10 | Pass-the-baton events |
| 2011-01-06 | Some races |
| 2006-12-21 | Track events |
| 2005-12-10 | Pony Express segments |
| 2005-11-20 | Devices in electrical networks |
| 2004-02-05 | Circuit breakers |
| 1999-01-24 | Communications satellites |
| 1998-01-23 | Imparts |