Advantages and disadvantages of elimination system: advantages: saving competition time; Disadvantages: In addition to the first place, other places can not be reasonably determined, and teams with poor strength have fewer opportunities to exercise.
2. Single elimination system: Single elimination system means that the participating teams are eliminated after one failure. This kind of competition can finally decide the third place in the championship, but it can't decide the rest.
3. The arrangement method of the single elimination system is as follows: first, make a round table according to the number of participating teams, then draw lots for each team, and then fill in the team names in the corresponding table.
The winning team in the first round enters the second round, and the winning team in the second round enters the third round, and finally the winning team is decided. The winning team is the champion and the losing team is the runner-up.
If the teams participating in the competition are not a power of 2 (4,8,/kloc-0,6,32 ...), some teams will have a bye in the first round. In terms of arrangement, the number of teams in the second round should be a power of 2.
In the first round, five teams had a bye, and in the second round, it was a power of two.
It is not difficult to see from the above round table that the single elimination system does not fully conform to the principle of "fair competition". If two strong teams meet in the first round, one of them is bound to be eliminated. In order to overcome this shortcoming, we should first put the "seed team" in the appropriate position of the round table meeting. If there are two "seed teams", they should be at the top and bottom of the round table respectively. If there are four "seed teams", they should be arranged at the top and bottom of two and a half areas respectively. If there is a bye in the game, the "seed team" should give priority to the first round of bye.
The single elimination system can only determine the third place in the championship. If it is necessary to decide the remaining rankings, a play-off should be held. If the two teams that failed in the second round play again, they will win the third and lose the fourth. In the first round, the losing team can play the play-offs, and the fifth to eighth places can be determined.
4. arrangement of double elimination system: double elimination system, that is, the team will be eliminated after two failures. This way of competition increases the chances for the team to play, thus reducing the chances of winning or losing the game.
The arrangement of the double elimination system is basically the same as that of the single elimination system, except that after entering the second round, the failed team will play, and the team that fails again will be eliminated.
Except for the champion and runner-up, the rest of the rankings can be determined according to the number of wins in the competition. If the two teams win the same number of times, the winner of the two teams' game ranks first. If there is no match between the two teams, the ranking is tied. In addition, the remaining rankings can be decided by the way of play-offs.
5. Problems that should be paid attention to in the arrangement of elimination system:
(1) In order to avoid the collision between strong teams, the seed team can be determined first;
(2) The bye teams should be arranged in the upper half and the lower half respectively;
(3) Make-up matches can be made when determining the ranking of other competitions.