Top seed GM Timur Gareyev of USA scored a comfortable victory over S Kumar on the top board, while the second board saw Russian Grand Master Ivan Rozum settle for a draw against lower-rated Harshal Patil.
In a Kings Indian Defence game that lasted 75 moves, Karthik got the better of Atalik. An end game lapse in the fourth hour saw the Turkish GM go an exchange down, which the local lad converted precisely in his favour.
Tukhaev Adam (Ukr) bt Ghelani Dhairya; Vitaly Sivuk (Ukr) bt Godson Merlin E; Thrish Karthik bt Atalik Suat (Tur); Pruijssers Roeland (Ned) bt Kanishk S K; P Karthikeyan bt S Rohit; Deepan Chakkravarthy bt Samdani Sahil Sagar.