Playing the white side of a Ruy Lopez, Kathmale punished Estonian-turned American Ehlvest for entering unwarranted complications out of an equal position once the queens got traded.
The Indian was precise in his technique after Ehlvest sacrificed two pieces for a rook and pawn in the endgame and converted his material advantage in to a full point after 58 moves.
The victory took Kathmale to three points out of a possible four and he has emerged as one of the best performing Indians in this USD 50000 prize money tournament.
Gupta faced a highly original plan by the American in a Sicilian Najdorf game and though he equalised out of the opening, Shabalov had a nagging edge. In the middle game however, Gupta could not handle the attack on his king and eventually lost a piece to go down.
Grandmaster Sahaj Grover enjoyed a winning advantage against compatriot Mehar Chenna Reddy but a blunder in the middle game cost the former dearly as Reddy escaped with a draw. It was on the 34th move out of a Sicilian Rauzer, that Grover missed his chance and drew 10 moves later.
Howell, along with Yuri Solodovnichenko of Ukraine and Nils Grandelius of Sweden share the lead with a clean slate and they followed by a pack of nine players with 3.5 points each.
