| Clue | Source | Date |
|---|---|---|
| *Game timer that may implement the Fischer method | LA Times Daily | 16 Apr 2024 |
| Timer for a blitz game | USA Today | 30 May 2023 |
| Timekeeper for Hou Yifan or Magnus Carlsen | USA Today | 28 Dec 2020 |
| Its two halves can't run simultaneously | ||
| Its two halves can't run simultaneously |