The World Universities Debating Championship (WUDC) is the world's largest international debating tournament and one of the largest annual international student events. WUDC is held in the British Parliamentary format (involving four teams of two people in each debate). Each year, the event is hosted by an institution selected by the World Universities Debating Council. The tournament is colloquially referred to as "Worlds" and the winners of the open competition acknowledged as the "world champions". The current world champions, David Africa and Tobi Leung, are from the Ateneo de Manila University. The university with the most world championships is the University of Sydney with eight victories. History Predecessor Tournaments The Trans-Atlantic University Speech Association held tournaments in London (1976 and 1978) and at McGill University, Montreal, in 1977. Chicago was to hold a tournament in 1979 but this was postponed and then abandoned. A "World Debating Festival", sponsored by Honeywell was held in Sydney in 1978. The TAUSA event attracted mostly Northern Hemisphere tournaments, the Honeywell was largely Southern Hemisphere. The first competition was hosted in Glasgow and convened by debaters at the Glasgow University Union Format The championship is usually held in the days following the 25th of December, since many of the institutions attending from the Northern Hemisphere where the championship originated take vacations at this time. Although many countries that do not celebrate Christmas have become participants at the competition, the timing has remained the same. In most recent years, the nine preliminary rounds of the tournament have been held over three days from 29 to 31 December, with the elimination rounds being held on 2 January and the Grand Final on 3 January. In recent years, the championship has varied from about 150 to 400 teams, depending on the capacity of the host institution. With judges and organisers, this involves 500 to 1,000 participants in all. The competition involves nine preliminary rounds, which become "power-paired" as the tournament progresses, matching the strongest-performing teams against each other. Two teams form the "government" ("proposition" in the UK and North America) and two the "opposition" in each debate room. The process of scoring and pairing these teams is known as "tabbing". The scoring of teams is done by judges, most of whom are students or former students from the competing institutions, who return "ballots" with their scores to the adjudication team, led by a Chief Adjudicator who is assisted