The rules of the round robin event of the basketball round robin tournament

Number the six detachments 1-6.

First round: 1-6, 2-5, 3-4

Second round: 1-5, 2-4, 3-6

Third round: 1-4, 2-3, 5-6

Fourth round: 1-3, 2-6, 4-5

Fifth round: 1-2, 3-5, 4-6

According to the ranking, you can match the ration system.

If the 4 teams participating in the competition are Team A, Team B, Team C, and Team D, the competition arrangements are as follows:

1. Schedule:

A total of three rounds, 6 matches:

Round 1, Match 1: Team A vs Team B;

Round 1, Match 2: Team C vs Team D;

Round 2, Match 1: Team A vs Team C;

Round 2, Match 2: Team B vs Team D;

Round 3, Match 1: Team A vs Team D;

Round 3, Match 2: Team B vs Team C;

2. Competition Rankings:

1. After three games, they will be ranked according to the wins;

2. If two teams have the same record (2 wins and 1 loss), the winner will be ranked first.

3. If there are 3 teams with the same record (2 wins and 1 loss), the score score of each team in the three games will be compared.

In a single round-robin match, all teams participating in the competition can meet once, and finally each team is ranked according to the points and points won and lost in all competitions.

The 4 sedan basketball teams play in a single round-robin tournament as follows:

1.The tournament is scheduled for each team to play three round-robins for a total of 6 matches.

2.The ranking is based on the number of wins and losses and the percentage of points won and lost.

3.In the event of a draw, the ranking will be based on the percentage of points won and conceded in each team's three games.

4.In a single round-robin match, all teams participating in the competition can meet once, and finally each team is ranked according to the points and points won and lost in all competitions.

1. Knockout.

The number of matches in the knockout round is calculated: there are n teams participating, and the eliminated (n-1) teams are playing (n-1) games.

Features: Closed, easily disturbed competition system. The ranking of each contestant (team) needs to be counted after the end of the whole competition before the final determination of their respective points, so it is inconvenient to increase or decrease the number of contestants once the competition starts, otherwise it will affect the calculation of the results of each contestant.

2. Round-robin.

1. Calculation method of single round-robin match: N teams participate, and each team and another n-1 team have to play, with a total number of games: 1 2n (n-1).

2. The calculation method of double round-robin matches: each team has a home game (n-1): an away game n-1, and the total number of games: n (n-1) games.

Features: Each team can play once or twice against the other team, and the final ranking is calculated according to the result (goal difference).

First look at how many teams there are, if it's 5:

1st round, 2nd round, 3rd round, 4th round, 5th round.

The above teams have 0 byes).

If it is 6 teams: (Replace 0 with 6).

1st round, 2nd round, 3rd round, 4th round, 5th round.

2-5 Vobi 6-4 5-3 4-2 3-6

The above is a fixed counterclockwise rotation method in the No. 1 position, which has the advantage of not repeating the game, and the rest time of each team is the same.

To explain, for example, if there are 5 teams, the first game of the first round is 2-5 (No. 1 bye), the second game is 3-4, the third game is 1-5 of the second round, the fourth game is 2-3, and so on. The 5 teams have a total of 10 games (2 games per round) and 6 teams have 15 games (3 games per round).

A total of 9 teams participated in the tournament. n*（n-1）/2

First of all, the meaning of the single round-robin system is: each team has to play with other teams once, if there are 4 teams to play a single round-robin game, then a team will have to play 3 times, but half of them are repeated, then 4 teams will have to play a total of 4 3 2 = 6 (times).

Solution: There are x teams participating in the competition.

x(x-1)÷2=36

x=9 9 teams play the tournament.

An event management system is required.