The India ‘A’ and ‘B’ teams registered comprehensive victories in the seventh round in the Open section of the 44th Chess Olympiad here on Friday.

Grandmasters Arjun Erigaisi and SL Narayanan secured wins over Abhijeet Gupta and Abhimanyu Puranik as India ‘A’, the second seeds, outclassed India ‘C’ 3-1.