The defending champion was held by seventh seed Zhao Xue of China in the World Junior chess championships.
Praggnanandhaa did not have to sweat hard to hold Caruana under Classical but in the Armageddon the American was a transformed player as he took advantage of his white pieces.
Vaishali stretched her lead to 2.5 points following her second win under classical time control.
The top seeded Indian GM settled for a short draw with Wang Yu of China in the sixth round of the 19th World junior girls' chess championship.
Uzbekistan's young grandmaster Abdusattorov Nodirbek emerged sole leader in the open section of the Tata Steel Chess India Rapid tournament in Kolkata on Wednesday.
S Vijayalakshmi is the lone Indian left in the fray.
Grandmaster Levon Aronian of Armenia won the boys' title in the World junior chess championships which concluded on Friday.
The top seeded Indian GM easily beat Ekaterina Ubiennykh of Russia in the 11th round and joined Zhao Xue of China and Nadezhda Kosintseva at the top in the World juniors girls' chess championship.
Top rated Koneru Humpy started off with an easy victory in the women's world championship opener but second highest Indian D Harika was held to a draw by compatriot Kruttika Nadig in the first game of the opening round in Hatay, Turkey on Sunday.
Humpy was no match for Alexandra Kosteniuk of Russia, going down 2-9 while Harika was ousted by world No.1 Hou Yifan of China
The Indian Grandmaster meets Cecile Van Der Merwe of South Africa in her opening match of the tournament.
WGM Zhao Xue of China emerged sole leader after the seventh round in the World junior chess championships.
World No 4 Koneru Humpy pulled off a great win using an unusual opening move with black and rounded off a very successful tournament with a share of the first place at the FIDE Women Grand Prix Chess in Kazan, Russia. She was tied at 7.5 points with the higher rated Anna Muzychuk of Slovakia.
Magnus Carlsen of Norway delivered a flawless performance on the final day to clinch the title in the Open section
Anand said the presence of four Indians in the event tells about the growth of chess in the country.
Abundantly talented but more significantly, incredibly cool in crunch situations, that's how India's 88th Grandmaster and World Cup winner Divya Deshmukh was described by her formative coach Srinath Narayanan, who feels the 19-year-old chess wizard's composure is comparable only to cricket great Mahendra Singh Dhoni.
Grandmaster Koneru Humpy beat Ekaterina Kovalevskaya of Russia in the second game to push the match into tie-breaker.
Vaishali defeated Muzychuk for the second time in the event in the Armageddon. It was a finely played Classical game wherein neither players could reach an advantage but in the Armageddon Vaishali took advantage of her better placed rooks to call the shots.
Magnus Carlsen concluded the first nine rounds with an impressive 6.5 points out of a possible 9.
Indian Grandmaster Arjun Erigaisi opened his campaign with four victories and a solitary defeat in the World Rapid Chess Championship and was tied fifth, even as defending champion Magnus Carlsen endured a frustrating day, managing to log just one victory in New York.
Five-time World champion Magnus Carlsen of Norway got the better of D Gukesh in the opening round of Norway Chess.
Emulates mentor Visvanathan Anand, who had won the tournament back in 1986.
The 17-year-old Gukesh is in joint lead with Russia's Ian Nepomniachtchi.
'It will bring the next wave of awareness and pursuit of excellence from people who want to take chess as a game or a competitive sport or even as a career.'
Arjun Erigaisi is in joint lead with 4.5 points from five rounds along with World No. 1 Magnus Carlsen and Vladimir Fedoseev after holding the Norwegian superstar in round five.
Indian Grandmaster R Praggnanandhaa got off to a flier and defeated Firouzja Alireza of France in the Armageddon game in the first round of Norway Chess tournament in Stavanger on Tuesday.
Gukesh to clash with Alireza on what promises to be a photo finish
Led by Viswanathan Anand, the Ganges Grandmasters outclassed upGrad Mumba Masters 12-4 on the final day of the Global Chess League, avoiding a last-place finish as the tournament heads into the finals.
D Gukesh played out a creditable draw against top seed Fabiano Caruana but slipped a rung to the joint second position.
Hungary will officially host the 45th edition of the Olympiad for the first time, having hosted the second unofficial Chess Olympiad in 1926.
Indian Grandmaster D Gukesh held on to the joint top spot with Russian Ian Nepomniachtchi after they played out an easy draw in the 10th round of the Candidates chess tournament in Toronto.
Gujrathi and Erigaisi will represent India in the men's individual event while Koneru Humpy and D Harika will do so in the women's section.
Newly-crowned world chess champion D Gukesh is looking forward to the day when the sport will become a part of the Olympic curriculum, which, he said, would take it to an altogether different level not just in India but across the world.
Teenaged Indian Grandmaster D Gukesh shot into sole lead after defeating Firouzja Alireza of France in the 13th and penultimate round of Candidates' Chess tournament in Toronto on Saturday, his quest for the extraordinary placing him on the cusp of becoming the youngest ever World Championship contender.
Prime Minister Narendra Modi on Wednesday lavished praise on Indian chess players, including former World champion Vishwanathan Anand, for coming up with an "innovative" way to raise funds for the country's fight against the coronavirus pandemic. Five leading players Vidit Gujrathi, P Harikrishna and B Adhiban, Koneru Humpy and Dharika, alongside Anand had participated in an online chess exhibition and helped raise Rs 4.5 lakh for the PM-CARES Fund.
The team drew with Kazakhstan in the final round to log 22.5 points in the nine-round Swiss league and emerge runaway winners.
India's schedule at the Asian Games in Hangzhou, on Tuesday, September 26.
Indian chess players failed to finish on the podium in the individual events
Here are the Indian Super Moms' at the Hangzhou Asian Games beginning on September 23.
Pragg, Gujrathi out of contention