[1] An even greater contribution from him is the hugely complicated and popular Grünfeld Defence which was first introduced, and then regularly used by him against Cochrane.
What little is known of Moheschunder comes from articles that John Cochrane, stationed at Calcutta in the 1840s, wrote for the London chess magazines.
It appears that Cochrane, who had defeated every player in England barring his protégé Howard Staunton, had been searching for some worthy opponents for some time.
[1] It is notable that many of Bannerjee's openings were based on single pawn moves, the "legacy" mentioned by Sergeant, as in the rules of Indian chess.
Cochrane is quoted in a letter written by a member of the Calcutta Chess Club, appearing in the Chess Player's Chronicle in 1850: Among his recorded games is the first instance of Gruenfeld Defence, more than 60 years before Ernst Grünfeld was to launch it against Alekhine at Vienna, 1922: [Site "Kolkata, India"] [Date "May 1851"] [Round "1"] [White "John Cochrane"] [Black "Mahesh Chandra Banerjee"] [Result "Black resigned"] 1. d4 Nf6 2. c4 g6 3.
[3][4] Moheshchunder had a flair for dramatic play evidenced by his sacrifices in this King's Indian Defence game (a variation known today as the Four Pawns Attack): Moheshchunder, like other Indian players of the time, favoured fianchettoed openings, trying to control the centre with long-distance pieces rather than occupying it with the pawns.
Possibly these ideas germinated in an environment of chess rules that did not permit the initial two-square move for pawns.