Elimination system is a form of competition. The loser in every game will be insulated from the champion or the championship, but it doesn't mean that there will be no competition after the loser is eliminated. In some competitions, losers still have to compete for rankings or heritage competitions.
1, form
Usually, the number of participants in a single defeat knockout is a power of 2 (2, 4, 8, 65, 438+06). For example, Wimbledon's singles event has 128 players, which can ensure that opponents in each round have the same number of matches.
Matches can be fully booked or decided after each round. Without bye, half of the players will be eliminated in each round. When there are only eight players left, this round is called the "top eight" and the next four players are the "semi-finals". The winners will meet in the "final" or championship to decide the reputation of the champion.
When the number of participants in the single-defeat knockout is not a power of 2, some contestants are allowed to "bye" and automatically advance to the last few rounds without competition. Usually, the discount of bye will be given to the player who ranks higher in the competition. For example, in the final stage of the American Football League, teams with forces other than 2 are specially selected to participate, and those teams with top rankings in the regular season will get a chance to bye.
2. Seeds
Single-loss knockout can be matched by random drawing, but in order to prevent popular players from being eliminated in earlier rounds and affect the observability of the game (including box office income, of course), the organizers will arrange the game by seed matching. The top two players compete in two lines, and only meet in the final, and the top four only meet in the semi-final, and so on.
Ideally, if there are no unexpected results, 1 seed will play against No.8 seed, No.2 against No.7, No.3 against No.6 and No.4 against No.5 in the quarterfinals. But in many competitions, it is not so strict. For example, in most tennis matches, seeds 1 and No.2 are divided into two zones, and then seeds No.3 and No.4 are randomly assigned to these two zones, and seeds No.5 to No.8 are also randomly assigned.
In some competitions, after each round or several rounds, the two sides will re-rank and let the highest ranked player compete with the lowest ranked player.
Extended data:
merits and demerits
1, advantages
(1) The competition is fierce because the negative side of the single defeat knockout will be eliminated. Except for the final qualifying consolation match, every round of the knockout round is crucial, so there is no meaningless game.
(2) It can accommodate a large number of contestants in a short time, so it has become the competition form of many competitions.
2. Deficiencies
(1) is not suitable for games where there may be a lot of lottery. For example, draw is very common in chess, and white is the first advantage, so it is often necessary to play one more game in each round to decide the outcome, so it is not suitable. In addition, in football matches, after a draw, it is often necessary to play overtime or even take a penalty (12 yard penalty) to decide the outcome.
(2) Most of the contestants may be eliminated prematurely, and there are only a few games, so some games adopt the double-loss elimination system.
Baidu encyclopedia-elimination tournament
Baidu encyclopedia-elimination system