- Who
- Olle Widell
- What
- 25 hours, 14 minutes day(s):hour(s):minute(s)
- Where
- Sweden (Gothenburg)
- When
The longest marathon playing chess underwater by a team of two is 25 hours, 14 minutes and was achieved by Olle Widell and Edvin Bergtsson (both Sweden) in Gothenburg, Sweden from 3 to 4 June 2013.
The attempt began at 11:59 a.m. on 3 June 2013 and ended at 13:14 p.m. on 4 June 2013. There were a total of 3 rest breaks taken throughout the attempt.