Guinness World Records confirms Tunde Onakoya as world record holder for longest chess marathon Nigerian chess master and founder of Chess in Slums Africa, Tunde Onakoya, has officially received recognition from Guinness World Records for the longest chess marathon, after completing an astonishing 64-hour session in New York City’s Times Square. Onakoya achieved the feat alongside American chess player Shawn Martinez, with the marathon taking place between April 17 and April 20, 2025. This triumph marks a significant comeback for Onakoya, who in April 2024 initially played for 60 hours, briefly surpassing...