The 28-year-old Chouhan, who bagged his second title of the year, ended the week with a tournament total of 14-under-271, overtaking Chikkarangappa as the Rolex Rankings leader.
Bangalore's Khalin Joshi came in second with a 10-under-275 total after his final round of two-under-69.
Today, the entire field played nine holes each on both courses - Beldih and Golmuri. While one half of the field teed off from Beldih, the other half began its round from Golmuri. Twenty-seven golfers with the best scores at the end of round three teed off from Golmuri and finished at Beldih. The par for the combined courses was 71.
Chouhan hit a few poor tee shots on the 10th, 11th and 14th that led to bogeys but he hung on to his dominant position thanks to birdies on the 12th, 16th, and 17th. Om Prakash landed it within three feet on the 16th and drained an eight-footer on the 17th.
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Chouhan took home the winning cheque of Rs 12,12,375.
Joshi of Bangalore, who was overnight tied third, carded a 69 today to finish runner-up, four strokes behind the winner. Joshi's final round featured five birdies, a bogey and a double-bogey.