The open event at the 43rd Chess Olympiad was held from 24 September to 5 October 2018. It was contested by a record number of 185 teams, representing 180 nations. Georgia, as host nation, fielded three teams, whilst the International Braille Chess Association (IBCA), the International Physically Disabled Chess Association (IPCA), and the International Chess Committee of the Deaf (ICCD) each provided one team. A total of 920 players participated in the open event.