GM Marat Dzhumaev registers for the Thailand Open April 8, 2010June 25, 2023 BCC News, Tournaments Grandmaster Marat DzhumaevGM Marat Dzhumaev, rated 2525, has joined the growing list of international grandmasters vying for the Thailand Open crown. Dzhumaev has represented Uzbekistan in two Olympiads and the Word Team Chess Championships.