At the DLF Golf and Country Club, Thomson smashed the existing record of 5-under set by Thai Kongkraphan Patchrajutar in 2015 and by Marianne Skarpnord on Friday, by three shots.
Even as the focus was Thomson, India's Vani Kapoor (69- 68) finished birdie-birdie to get a share of the crowded second place at 7-under.
Vani, teeing off from the 10th, once again took time to find her momentum as she turned in one-under. On the second nine, the front stretch of the course, she bogeyed the first, but birdied four times on second, fourth, eighth and ninth.
Lurking right behind them at 6-under 138 was Spaniard Carlota Ciganda (70-68). Six others Titiya Pluckasataporn (71 -68), Meghan MacLaren (69-70), Belen Mozo (74-65), Olivia Cowan (69-70), Klara Spilkova (69-70) and Lydia Hall (72-67) are Tied-7th.
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It was ten years ago that Thomson first came to India as a prodigious amateur to play in Bangalore at the Emaar-MGF Masters. She finished T-64.
A decade later, she is back here on the sponsors invite.
"I requested an invite after Abu Dhabi. Those 10 years in between are a story in itself working in police, working in a pro shop and meeting Donald Trump, too," she said.
She turned pro in 2009 and did begin fairly well if not spectacularly. However, after just half a season or so, she gave it all up, because pro golf was "lonely".
She joined the police and became a Beat Constable in Aberdeen. A little over two years later, she left the Police and worked in a pro shop and in the period from 2009 to 2013, she did not touch golf clubs.
After quitting police, she worked in a Pro shop. One day watching golf on TV re-kindled her aspirations. Working in the Police and watching difficult scenes put golf into perspective, said Thomson.
Thomson came back as a full time pro in 2013. She played local events and some on LET Access. By 2015 she had a win in Spain and was eighth on LET Access Money List. A year later in 2016 she secured a full card for 2017, finishing fourth on LET Access.
Aditi Ashok had a mixed day with four birdies and two bogeys for a second straight 70 that took her to 4-under and dropped from T-10 to Tied-13th place. Gaurika Bishnoi, despite finding 16 greens in regulation, carded 73 and is lying T-26, down from overnight T-10.
The only other Indian making the cut was amateur Pranavi Urs, who has been playing alongside the pros on the domestic Tour. The Bangalore golfer, Pranavi carded two-under 70 with five birdies, one bogey and one double. Four of her birdies came on front nine and at 3-over 147, she was T-51.
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