Chinnarat Phadungsil produced a blistering back nine to hold a five-shot lead after the opening round of the Avantha Masters in Greater Noida.
The 25-year-old from Thailand reached the turn at Jaypee Greens Golf Club on three under before managing seven successive birdies from the 10th onwards.
After a par at the 17th, the three-time winner on the Asian Tour then finished with another birdie at the last, meaning he came home in 28 shots to sign for an 11-under score of 61.
"This is my best round," Phadungsil, who won his maiden title at the age of just 17, said afterwards.
"Today was very hot putting. I holed a lot of great putts - just 22. On the back nine I hit the driver better than on the front nine, when I hit a lot of hook shots but holed my putts to save my score."
Phadungsil sits well clear of a group of five players - compatriots Chapchai Nirat and Chapchai Nirat, Indian Abhijit Singh Chadha, Wen-Chong Liang of China and Sweden's Magnus A Carlsson.
There is a logjam at five under, David Drysdale, who mixed seven birdies with two bogeys, one of eight men to sit six off the pace.
Drysdale's fellow Scot Peter Whiteford, a man who has mixed memories of the tournament having been disqualified in last year's final round when in a position to challenge for the title, and former Ryder Cup player David Howell were among a large group on four under.
Alvaro Quiros also reached four under par on his return to action after a four-month lay-off due to a wrist injury, only for two bogeys in his final four holes meaning the big-hitting Spaniard had to settle for an opening 70.
Defending champion Jbe Kruger of South Africa, who lifted the trophy at the DLF Golf and Country Club in New Delhi in 2012, fired an even-par 72.
Colin Montgomerie, meanwhile, faces a real struggle to make the cut. The former Europe Ryder Cup captain failed to muster a single birdie in his 76.