Two of Peru's strongest players dominated a 67-hour chess marathon in Lima last week, grinding through nearly three days of consecutive play at the Sheraton Hotel. Jorge Cori and Faustino Oro emerged as the standout performers in what amounted to a grueling test of endurance as much as chess skill.
The WR Chess World Record Marathon drew top South American grandmasters competing for $100,000. Playing chess for 67 of the available 72 hours meant minimal rest between games. Players had to balance tactics and strategy with simple physical exhaustion. The format favored those who could maintain mental sharpness when fatigue set in.
Cori and Oro handled the punishment better than their opponents. Both kept their calculations precise and avoided the blunders that typically plague exhausted players. Shorter time controls for individual games helped the marathon stay on schedule while still demanding accurate play.
Events like this test a different skill set than classical tournaments. Preparation means less than temperament and stamina. A player can know theory perfectly but crumble after sixteen straight hours without proper sleep.
South American chess produced the goods in Lima. The region has solid depth at the grandmaster level, and this marathon proved it. Peru's chess federation organized a spectacle that worked, drawing attention to a part of the chess world that deserves more coverage.