| Clue | Source | Date |
|---|---|---|
| Engineering competition with two "battling" devices | New York Times | 27 May 2026 |
| Engineering competition in a dohyo | Universal | 02 Aug 2025 |
| Enginering competition inspired by a Japanese sport | ||
| Sport featuring pushing machines | Universal | 28 Oct 2023 |
| Sport where machines try to push each other out of a circle | USA Today | 26 Jul 2023 |
| ****Autonomous wrestling | Universal | 02 Jan 2021 |
| Engineers' competition set in a ring |