- Joan Oliver Marquet, Antonio Nadal Tur
- 44:21 hour(s):minute(s)
- Spain (Palma)
The longest chess marathon is 44 hr 21 min and was achieved by Joan Oliver Marquet and Antonio Nadal Tur (both Spain) in Palma, Spain, from 16 to 18 January 2016.
Joan and Antonio attempted the marathon to raise money for a young boy with a rare muscular disease.