Saravana Krishna, who is rated 2296, defeated ninth seed Hungarian GM Adam Horvath rated 2501 while 14-year-old Tarun registered his fourth consecutive victory by defeating IM Himal Gusain of Chandigarh.
Himal could have forced a draw but decided to continue playing for a win and ended up losing to the TN boy.
In yet another upset, 10-year-old Sreeshwan Maralakshikari (rating 1968), from Andhra, beat fifth-seeded GM Vitaly Sivuk with the white pieces by playing with the agility of a seasoned fighter.
Bihar's 13-year-old Saurabh Anand was close to score his second straight win over a GM, but blundered and lost.
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Indian IMs, Sayantan Das and Saptarashi Roy, both from Bengal, and Shyaamnikhil P of Tamil Nadu, won comfortably against their lower rated opponents to join Tarun and Ukrainian GM Valeriy Neverov in the lead with four points.
In the Juniors category, the first and the third board games between the leaders ended in a draw. This allowed Sankarsha Shelke of Ahmednagar in Maharashtra to break the deadlock and grab the lead by winning his games on the second board. After five rounds of play, he led with five points.
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