The Santosh Trophy is India's most prestigious football tournament. It uses a cluster format where states are divided into groups and play each other. The winner of each cluster advances to the pre-quarterfinals. From there, 8 teams advance to the quarterfinals where they join last year's top 4 teams. The quarterfinals use a league system to determine the 4 semi-finalists, who then play to decide the winner. The document provides details on the tournament structure and hopes Mizoram qualifies.