Manuel Onwu scored a hat-trick for the hosts, while Bartholomew Ogbeche netted twice to lead the Golden Boot standings with 15 to his name.
FC Goa overcame a strong fightback from Odisha FC after being three goals up to prevail 4-2 and reclaim the top spot in the Indian Super League, at the Kalinga Stadium in Bhubaneswar, on Wednesday.
Odisha FC were a little too predictable and Hyderabad's defenders were able to deal with them without too much discomfort.
Portuguese forward Goncalves opened the scoring in the 15th minute, before putting Chennaiyin two-up by converting a penalty in the 21st minute.
Dimas Delgado found Harmanjot Khabra who routed the attack from the right and floated a perfect cross into the box. Chhetri leapt higher than Shubham Sarangi and headed home. The goal made him the first Indian player to record 50 goals contributions in the Hero ISL -- 42 goals and 8 assists.
Bengaluru FC had to settle for their third draw in as many matches in Hero Indian Super League after being held goalleds by Jamshedpur FC at the JRD Tata Sports Complex in Jamshedpur on Sunday.
The first meeting of the season between Hero Indian Super League heavyweights finished all square after FC Goa and Bengaluru FC shared the spoils in a 1-1 draw, in Margao, on Monday.
Both sides created chances in the first half but it was SCEB who converted them and deservedly headed into the break with a two-goal cushion.
ATK now have 33 points as they remained firm in contention for the top-spot.
After constant pressure, Bengaluru were finally rewarded with the equaliser in the 82nd minute when Paartalu nodded in Cleiton's in-swinging corner.
All the results from the I-League and ISL matches played on Thursday