The first indoor championship took place in Germany in 1938, involving four teams from Europe made up of 7 players who competed in a round robin stage to find a winner. It wouldn't be until sixteen years later where the second World Championship was held in the country of Sweden. Throughout their history, the World Championships have been dominated by European teams, with no medals being won by non-European countries until 2015, by Qatar. Over the years, the organization of the World Championships has changed. Initially, there were group games in both the preliminary and main rounds, but since the
1995 edition a knockout system has been applied after the preliminary round. ==Tournaments==