LALITPUR: Nalanda and Oasis started the first Nalanda Inter-school Basketball Championship with victory here on Saturday. In the opening match of the tournament, hosts Nalanda thrashed Caribbean 50-18 riding on 16 points from Nabin Lohar. In the second match of the day, Oasis thumped IJ Pioneer 27-10 riding on eight points from Samit Limbu. A total of five teams are competing in the tournament. Top two teams will advance to the finals.