The Swiss competition system is also called "round robin": the basic principle is to avoid the seed players from fighting at the beginning. It is a scientific, reasonable and widely used competition system so far. The English abbreviation is SS, which is made in Switzerland.
Specific methods: The first game is based on the player's grade (old score): the player with the highest grade is paired with the player with the middle grade, and the player with the second highest grade plays against the player below the middle grade. In the future, each round will be re-matched according to the decided score. The matching in the second round and beyond shall be based on the cumulative results of this competition, and try to match players with the same level. The whole "Swiss system" competition will not let the same pair of players meet twice in the same competition.
It can be seen that "Swiss system" is a competition system that has the main advantages of round robin and elimination, but also avoids the main disadvantages of these two competitions. It's really unique.
Advantages and disadvantages of the Swiss system:
In order to determine the champion (or last place) of a game without dispute, it is necessary to have the same number of rounds as the knockout, that is, the number of participants takes the logarithm of 2. For example, 8 players need 3 rounds to determine the champion, and 16 players need 4 rounds to determine the champion. But sometimes it is less than the theoretical rounds, and after all rounds, more than one player will win.
The inherent advantage of the Swiss competition system over the elimination system is that it does not need to eliminate any contestants. Before the game, players can be sure that no matter how they play, they can participate in all rounds of games without worrying about being eliminated in advance. In the worst case, when the number of players is odd, there will be a round without competition (that is, a bye), but you can still guarantee to get 1 point.
A player can only have one bye at most. Unlike the knockout round, the Swiss competition system will save the suspense for the last game. Sometimes a player leads too much, and one or even several rounds in advance can ensure the championship. The common remedy is to make the Swiss system first, and then eliminate the top players to decide the champion. The advantage of Swiss competition system over round robin competition is that when there are many contestants, there is no need to play many rounds.
One disadvantage of the Swiss competition system is that, except for the last champion and the last place, according to different scoring methods or breaking the same score, the ranking of intermediate players may be rough and random or draw lots.