- Sjur Ferkingstad, Hallvard Haug Flatebø
- 56:09:37 hour(s):minute(s):second(s)
- Norway (Haugesund)
The longest chess marathon is 56 hr 09 min 37 sec, and was achieved by Hallvard Haug Flatebø and Sjur Ferkingstad (both Norway) in Haugesund, Norway, on 11 November 2018.
Hallvard and Sjur are both keen blitz chess players.