Josh Hill shot a final round of eight-under-par 62 on Wednesday to prevail by two strokes and beat the record set by Ryo Ishikawa in 2007. Ishikawa lifted the KSB Cup trophy at the age of 15 years and eight months.
20-year-old Kochhar, who teed off in the morning session and started his round from the front-nine as compared to his first round starting from back-nine, sank five birdies in the second round and his only blemish in the tournament had come in the form of a bogey on Thursday.
28-year-old Chadha, who fought his way back on to the Asian Tour after a three-year gap with a solid performance at the Asian Tour Qualifying School earlier this year, trailed the halfway leader Rory Hie of Indonesia by one shot.
With the calendar even more crowded thanks to the golf event at the 2020 Tokyo Olympics, the Classic will be the first of 49 official FedEx Cup events, of which 11 will be played between now and late November as part of the so-called 'wraparound' season.
The youngster will play in the Asian Tour event in the form of the inaugural Classic Golf and Country Club International Championship at Gurgaon from September 12-15, before playing at Jaipur Open in the same month.