Tiviakov and India's P Karthikeyan jointly lead the pack with eight points, followed by M R Venkatesh, M R Lalith Babu, S L Narayanan, G Akash, who all are half-a-point behind.
Karthikeyan drew his game, on the top board, with Venkatesh.
The second board game between the top two seeds saw Sergei Tiviakov coming out firing on all cylinders against Ahmed Adly. The closed Sicilian game went in favor of Tiviakov after 49 moves.
Young S L Narayanan kept his good form scoring an upset win over Ukraine Grandmaster Oleksienko Mikhailo in 39 moves.
India's Kathmale Sameer made his International Master Norm holding Grandmaster Arun Prasad to a draw. The nine game IM Norm is the second Norm in the event, adding to the one Ram S Krishnan made in the previous round.
Round 9 Results (Indians unless specified)
M R Venkatesh 7.5 drew with P Karthikeyan 8, Sergei Tiviakov (Ned) 8 bt Ahmed Adly (Egy) 6.5, Rolando Nolte (Phi) 7 drew with Lintchevski Daniil (Rus) 7, S L Narayanan 7.5 bt Oleksienko Mikhailo (Ukr) 6.5, M R Lalith Babu 7.5 bt R R Laxman 6.5, G Akash 7.5 bt Sahaj Grover 6.5, Ram S Krishnan 7 drew with M Shyam Sundar 7, Neelotpal Das 6.5 drew with CRG Krishna 6.5, Mark Paragua (Phi) 6.5 drew with Akshat Khamparia 6.5, Karthikeyan Murali 6 lost to Marat Dzhumaev (Uzb) 7.