A Guinness World Record achieved by Iran's Ehsan Ghaem-Maghami in February 2011 in Tehran. He played 604 opponents simultaneously, finishing with 580 wins, 16 draws, and 8 losses (a 97.4% win rate). He moved between boards non-stop for approximately 25 hours, a feat demanding extraordinary physical endurance and mental fortitude in equal measure. The previous record was 523 simultaneous games, held by Israel's Alik Gershon.