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. There may also be many rounds of goodbye. For example, teams from the Championship and Premier League can directly participate in the third round of the FA Cup. In order to quickly consume most athletes and preserve their physical strength.
Although the team that lost in the single-defeat knockout lost the chance to compete for the championship, they will continue to participate in some competitions, especially the Olympic Games, to determine the final ranking. For example, the two teams that lost in the semi-finals often have to play another game to decide the ranking of the third and fourth places. Because this kind of competition is often not very important, it is sometimes called comfortable competition.
In the case that many people or teams can participate in the same game, such as poker, players or teams will be eliminated one by one until only the last person (team) remains. Single-loss knockout can be matched by random lottery, 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. This may cause players in one region to be better than players in other regions. Considering that there are only 32 seeded players in the tennis Grand Slam, it is likely that the 33rd player and the 1 player will meet in the first round when the 128 player plays. This arrangement seems unreasonable, but considering that the rankings of tennis players are determined by computers, generally speaking, the changes in rankings are relatively small, so they will not be arranged randomly, but all players will be arranged according to the rankings in a so-called fairer way, so there will be many repeated matches.
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. Both the American Hockey League and the American Football League adopt this method, while the American Professional Basketball League (NBA) does not adopt the method of re-ranking. The rules of NBA are the winners of No.65438+No.0 and No.8, and the winners of No.4 and No.5 will play in the next round. This has led some teams to deliberately lose the game and occupy the sixth place when determining the fifth and sixth places in the regular season, so as to avoid meeting the seeds of 1 prematurely. superiority
■ The competition is fierce because the negative side of a 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.
■ It can accommodate a large number of contestants in a short time, so it has become the competition form of many competitions.
disadvantaged
■ 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.
■ Most of the contestants may be eliminated prematurely, and there are only a few games, so some games adopt the double-loss elimination system.