The tournament was played in two different stages. In the first stage, the thirteen participants were divided into four groups (three groups of three teams and one group of four teams). In the second stage, two groups were formed, one containing the winners and runners-up from all first stage groups (eight teams in total) to contest the tournament title. A second group was formed by the remaining five teams which played for position places (9th to 13th). All groups in both stages played a single round-robin format.