Vani, who won four titles in six starts in 2017, carded an even par 72 to finish five-over 221 and edge out Saaniya Sharma by two shots. Saaniya shot one-over 73 which included a costly double bogey on par-5 14th hole. She also had a bogey earlier on 11th hole.
Gursimar Badwal finished third in a tie with Tvesa Malik as both shot 73 each and also finished on the same total of 226.
Vani started the final day one shot ahead of Neha Tripathi and opened bogey-bogey.
Saaniya's game was patchy with birdies following bogeys or vice-versa. She also double bogeyed par-5 14th. A birdie on 16th came too late as she fell back and finished second.
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Gursimar had contrasting nines. She had three birdies on front nine and was in contention. However, four bogeys and a closing double bogey came in the way of a win. She did have an eagle on par-5 14th but it was not enough.
Vani picked up a cheque of Rs 1,26,000 while Saaniya earned Rs 1,02,000.
Smriti Mehra (76) was fifth with a total of 227 while Neha fell to sixth with a round of 78 and a total of 228.
Afshan Fatima (78) was seventh at 234. Mehar Atwal (75) and Amandeep Drall (79) were tied for eighth place.
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