Viswanathan Anand had gone to Germany to take part in the Bundesliga Chess tournament and was slated to return on March 16.
Viswanathan Anand and Koneru Humpy will lead India's men's and women's teams respectively in the Chess Olympiad to be held in Moscow.
Anand and world champion Magnus Carlsen rang the bell at Eden Gardens on the second day of India's first-ever pink ball Test against Bangladesh in November last year.
Viswanathan Anand was held to an easy draw by Dutch hopeful Jorden Van Foreest in the sixth round of Tata Steel Masters.
Viswanathan Anand remained winless for the fourth round running, while world champion Magnus Carlsen registered his 111th game without losing, surpassing a 15-year-old record.
On the second day of the Kolkata Test, Magnus Carlsen and India's Viswanathan Anand rang the ceremonial bell at Eden Gardens to mark the beginning of the first session.
Viswanathan Anand is in joint third spot with six points along with Ding Liren of China and Anish Giri of Holland, while Magnus Carlsen is on top with 10 points.
Filipino-American Grandmaster Wesley So said Viswanathan Anand was so intelligent that he could have been something great even if he did not become a chess player.
Viswanathan Anand, who finished a disappointing tied third in the Sinquefield Cup last month, needs 13 points from the remaining two legs in Bucharest and Kolkata.
Prithu Gupta's achievement came 31 years after Viswanathan Anand had become India's first Grandmaster.
Virat Kohli was recently subjected to Twitter backlash after asking a cricket fan to "leave India".
India beat Egypt 2.5:1.5 in open section at the 43rd World Chess Olympiad but the women's team was held to a 2-2 draw.
Former World Champion Viswanathan Anand signed peace treaty after 43 moves with Ian Nepomniachtchi on the top board.
Fifth-seeded Indian open chess team will be up against defending champions US at the 43rd World Chess Olympiad.
India coasted to a comfortable victory against lowly rated Canada winning three games.
World rapid champion Viswanathan Anand put it past Markus Ragger in a brilliant positional game as the Indian men's team cruised to a 3.5-0.5 victory over Austria in the second round of the 43rd Chess Olympiad.
Viswanathan Anand endured a difficult first day but came storming back on the final day of the World Blitz Chess Championship.