Dee ihe na-aga n'ihu maka paragraf a - Harshana nwetara nrite ọla nchara na Ngalaba Na-erubeghị afọ 7 na 2009 Asian Schools Chess Championship nke a na-eme na Sri Lanka. O nwetakwara ihe nrite ọla edo n'okpuru afọ iri na otu na 2014 World Schools Chess Championship nke emere na Brazil. E nyere ya aha Candidate Master n'afọ 2015. O ritere ọla ọcha n'asọmpi n'okpuru afọ iri na atọ n'asọmpi World Schools Chess Championship nke e mere na Sochi, Russia n'afọ 2016. O nwetakwara nrite ọlaọcha na Ngalaba N'okpuru 15 na 2018 World Schools Chess Championship nke emere na Albania. O nwetakwara ihe nrite ọla edo na Under 16 open category na 2018 Commonwealth Chess Championship nke emere na New Delhi. N'otu afọ ahụ, e nyere ya aha FIDE. Ọ sonyekwara na 43rd Chess Olympiad
nke e mere na Georgia n'afọ 2018 ebe o nwetara akara 6 site na egwuregwu 10.