It took Gujrathi 40 moves to outwit Benjamin and now he shares the lead with six others. The fourth Indian to cross the 2700 ELO rating barrier, Gujrathi will face American Grandmaster Aleksandr Lenderman in the fifth round.
It has bolstered the home team's medal chances at the 14-day event, which is expected to see massive participation from more than 150 countries.
High-flying with his superman-cap, overnight joint leader Grandmaster Gupta ran out of steam and surrendered to Nakamura on a day when B Adhiban also did well to hold Levon Aronian of Armenia to a creditable draw.
A summary of sports events and persons who made news on Thursday