Guinness lists Tunde Onakoya and Shawn Martinez jointly for a 64-hour longest chess marathon in New York.
Tunde Onakoya · joint record holder with Shawn Martinez.
See the receipts
In a public source · Source describes the event interval as 2025-04-17/2025-04-20. No single date is assigned.
Record entry Who/What/When and body, lines 59–76; header date is start, body provides full interval Context only; no XP awarded. Historical roles and announcements do not establish continued status in 2026.
Guinness World Records · Date not listed
Checked 8 Oct 2026 · Record entry Who/What/When and body, lines 59–76; header date is start, body provides full interval