Unrated youngster Chris Isaiah in joint-lead

Unrated 12-year-old Chris Isaiah continued his red-hot streak by scalping 11th seeded Guru Prakash (Elo1566) in the fourth round to join the elite lead pack of IM Vikramaditya Kulkarni, Amardeep Bartakke, Yash Kapadi, Arnav Kherdekar, Om Gada and Kavin Vijaykumar in the Accurate Springs FIDE rating classical tournament, organized by Indian Chess School, here, at the Russian Centre for Science and Culture.