Indian Grandmaster Vaibhav Suri shocked top-seeded Russian Vladislav Artemiev in the 6th round of Aeroflot Open chess tournament here and was placed joint third.
Azerbaijan's Rauf Mamedov settled for a draw with Manuel Petrosyan of Armenia and remained in lead with 5 points.
Sanan Sjugirov of Russia defeated his compatriot Vadim Zvjaginsev and was in second spot with 4.5 points alongside Turkey's Mustafa Yilmaz and Petrosyan.
Suri (Elo rating 2591) outlasted the higher-rated Artemiev (Elo 2728) in a 71-move game as the Russian's moderate tournament continued.
The victory took the 23-year old Indian to four points while the No.1 seed remained stuck on three.
A group of Indians including 13-year old Bharat Subramaniyam, B Adhiban, Aravindh Chithambaram, Arjun Erigaisi and Suri were behind the leading pack with four points.
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Most of the Indian players including Adhiban, Subramaniyam, Chithambaram, the national champion and Karthikeyan Murali had to settle for draws.
Talented young GM R Praagnanandhaa (Elo 2602) recovered after a loss to Russian GM Mikhail Antipov by securing a draw with Sergey Grigoriants. He had three points after six rounds.
Important Results of Aeroflot Open 'A' Group 6th round: Rauf Mamedov (AZE) 5 drew with Manuel Petrosyan (ARM) 4.5; Sanan Sjugirov (RUS) 4.5 beat Vadim Zvjaginsev (RUS) 3.5; Bharat Subramaniyam (IND) 4 drew with David Paravyan (RUS) 4.
S P Sethuraman (IND) 3.5 drew with Aleksandr Shimanov (RUS) 3.5; B Adhiban (IND) 4 drew with Boris Savchenko (RUS) 4; Vladislav Artemiev (Russia) 3 lost to Vaibhav Suri (IND) 4.
SL Narayanan (IND) 3 drew with Dmitry Frolyanov (RUS) 3; R Praggnanandhaa (IND) 3 drew with Sergey Grigoriants (RUS) 3; N R Visakh (IND) 3.5 drew with Aleksandr Rakhmanov (RUS) 3.5; Aryan Chopra (IND) 3.5 drew with Karthikeyan Murali (IND) 3.5; Aravindh Chithambaram (IND) 4 drew with Pouya Idani 4; M Pranesh (IND) 3 drew with Abhimanyu Puranik (IND) 3.