Playing black, Ponomariov beat Loek Van Wely, while, with white, Grischuk got the better of American Gata Kamsky at the World Chess Cup.
The former World Junior champion beat Giovanni Vescovi of Brazil at the World Chess Cup.
Alexander Goloshchapov, Ashot Anastasian and Aleksej Aleksandrov share the lead in the Masters' section at the Abu Dhabi International Chess Festival.
Krishnan Sasikiran, P Harikrishna and Surya Shekhar Ganguly won their second round ties to lead the fray along with 21 others in the Dubai International Chess championship.
Joint leaders Saidali Iuldachev of Uzbekistan and Pavel Kotsur of Kazakhstan split points in the sixth round of the Parsvanath International Chess tournament.
Saptarshi Roy Chowdhury beat the chess prodigy in the ninth round of the 41st National 'A' Chess Championship.
Nine players share the lead after the second round in the 41st National 'A' Chess Championship.
The Indian men's hopes of a podium finish went up in smoke after they lost 0.5-3.5 to United States of America while the women's team held France 2-2 in the ninth round of the 32nd Chess Olympiad now in progress in Dresden.
The men's team beat Austria to move to joint-seventh place, while the women lost to Hungary and slumped to 14th place after the fifth round in the 32nd Chess Olympiad, in Dresden, Germany.
She needs two points from the next five rounds at the British chess championships to get the norm.
Viswanathan Anand's absence was felt as India could manage only a 2-2 draw against Uzbekistan in the ninth round of the Chess Olympiad.
Indian men scored a 2.5-1.5 victory over Bulgaria but the women suffered defeat at the hands of Armenia at the Chess Olympiad
Surya Shekhar Ganguly and P Harikrishna scored victories to help India post a resounding 3-1 victory over Germany.
Viswanathan Anand and National champion Surya Shekhar Ganguly were held in a 2-2 draw in the fifth round of the Chess Olympiad.
He defeated Arun Prasad at the 43rd National 'A' chess championship.
The former world junior champion settled for an easy draw in the first game of the third round in the World Chess Cup.
The Indian GM marched his way in to the second round of the World Chess Cup with a sweeping 2-0 win over Yu Shaoteng of China
The Indian chess team totalled nine points, to finish behind China (11) and ahead of Vietnam (8), in the team event at the second Asian Indoor Games in Macau.
GM Krishnan Sasikiran recorded his second straight victory humbling GM Mahamad Al-Modiahki of Qatar in the fifth round.
But their medal hopes remain dim after the 13th and penultimate round of the 36th Chess Olympiad.
Indian man scored a victory over unfancied Uruguay in their first round at the Chess Olympiad.
Krishnan Sasikiran, P Harikrishna and Surya Shekhar Ganguly won their fourth round games to remain in joint second position at the Dubai International Chess Championship.
The Indian GM lost to GM Nigel Short of England in the 8th round of the Gibtelecom Masters International Open Chess Congress.
Harikrishna, Chanda and Ganguly share lead before the last round in the National 'A' chess championship.
Indian men cruised to a crushing 3.5-0.5 victory over Canada in the 11th round of 36th Chess Olympiad.
Abhijit Kunte and Surya Shekhar Ganguly scored victories in a 3-1 victory over The Philippines in the third round of the Chess Olympiad.
Grandmasters S S Ganguly and Sandipan Chanda share the lead with the top seed at the end of the 21st round in the National 'A' chess championship.
The chess prodigy beat T S Ravi to lead the fied after the seventh round in the National 'A' championship.
Fabiano Caruana of United States made sure of his maiden title after beating Jan-Krzysztof Duda of Poland.
Alireza Firouzja remained in joint lead with Caruana on 5.5 points and these two are now ahead of Wesley So of United States and Jorden Van Foreest of Holland.
Reigning world rapid champion Viswanathan Anand drew his sixth straight game of the tournament to stay undefeated and have a mid-table placing at number four with three points.
Five-time World champion Viswanathan Anand gave a fine endgame lesson to young Alireza Firouzja, jumping to joint sixth position at the end of 11th round of Tata Steel Masters, in Wijk Aan Zee, The Netherlands, on Saturday. With his second victory, Anand clawed his way back to a fifty percent score and will now hope to end the tournament on a high. At just 16 years, Firouzja is less than one third of Anand's age, and the Indian ace showed that the Iranian still has a lot to learn.
Anand has been trying to play very complicated positions and the sixth round was no different.
With the triumph, the Indian GM qualifies for next year's Tata Steel Masters Group.
It was on move 21 that Giri thought he was out of trouble and proposed a draw.
The day produced four decisive games and it was again the youngsters who provided most of the entertainment.
India will be fielding three teams each in the Open and women's sections respectively.
Five-time world champion Viswanathan Anand squandered away a good start and could just end Day 1 on a fifty percent score after the end of the fifth round of World rapid chess championship in Berlin.
Indian Grandmaster Vidit Gujrathi drew with Richard Rapport of Hungary in the ninth round to be in joint third place with 5.5 points in the Tata Steel Masters in Wijk Aan Zee, The Netherlands.
Anand, as white, had simply an extra pawn and this is where the tenacity of Carlsen came to fore.