four rather than two teams in each debate. The preliminary round for many such competitions, including the World Universities Debating Championship, ranks teams by a modified form of Swiss tournament, usually called a tab. "Tab" also denotes to the software used for scheduling of rounds and tabulation of results. Teams are ranked from first to fourth in each debate and awarded from three down to zero points. Teams with similar points totals are grouped off for each successive round. Just as chess Swiss tournaments are arranged to ensure players have a balance of playing with black pieces and white pieces, so too debate tournaments attempt to provide teams with a balance of places in the speaking order (i.e. Opening Government, Opening Opposition, Closing Government, and Closing Opposition). With four competitors rather than two, significantly greater compromise is required to balance the ideal requirements of, on the one hand, a team not meeting the same opponent twice and, on the other hand, a team having a balanced mix of places in the running order. Esports Mind Sports South Africa, the national body for esports in South Africa, uses a Swiss system for all its tournaments. For its Swiss implementations, players receive three points for a win and only one for a draw and no player can play against another player more than once. There is the further provision that no player may play against another player from the same club in the first round as long as no one club has 40% of the entrants. Overwatch Open Division also makes use of the Swiss system, as well as the Hearthstone Global Games tournament. A variation of Swiss system common in esports tournaments sees participants play until reaching the preset number of wins or losses, instead of having everyone play the same number of games. In this system, player or team that wins the required number of games advances to the next stage of the tournament and doesn't play any more games in this stage; conversely, those who lose enough games are eliminated from the tournament. This system was used for the first time by ESL during qualifying rounds for the ESL One Cologne 2016 tournament, and has been used since then in all Counter-Strike: Global Offensive Major Championships. The format was also used for the Dota 2 Kiev Major tournament in 2017, Magic: The Gathering Arena Mythic Championship tournaments, and Gears