Even number. The team that met 0 had a bye. When arranging, the team is evenly divided into two halves, the numbers in the left half are arranged from top to bottom according to the serial number 1, and the numbers in the right half are arranged in numerical order.
The first round consists of rows from bottom to top, and then connected by horizontal lines. From the second round, there are many ways of rotation.
There are two commonly used methods: "counter-clockwise rotation" to arrange, and Arabic numerals are used as code names instead of team names to arrange first. Divide the number of teams into equal sides according to the U-shaped trend. In the case of odd-numbered teams, the last digit plus 0 becomes an even number. In the first round, as long as a horizontal line is drawn between the opposing U-shaped teams, it is the order of the first round. In the second round, the number 1 in the upper left corner is fixed, and the rest of the numbers move one position counterclockwise, which is the order of the second round, and so on in subsequent rounds. In case of team O, the team will have a bye.
For example, there are 7 teams participating in the competition, and the competition order is as follows:
The first, second, third, fourth, fifth, sixth and seventh rounds.
1—0 1—7 1—6 1—5 1—4 1—3 1—2
2—7 0—6 7—5 6—4 5—3 4—2 3—0
3—6 2—5 0—4 7—3 6—2 5—0 4—7
4—5 3—4 2—3 0—2 7—0 6—7 5—6 Since 1985, the "Berg" arrangement method has been widely used in world competitions. Its advantage is that the odd-numbered team can avoid the unreasonable phenomenon that the second-round bye team played against the last round from the fourth round.
Use the "Beagle" arrangement. When arranging, if the queue is even, divide the queue number into two halves (if the queue is odd, the last number is "0"), and the first half starts from 1 and is written on the left from top to bottom; The second half of the number is written on the right from bottom to top, and then the relative numbers are connected by horizontal lines. This is the first round of the game.
In the second round, the number ("0" or the maximum number of yards) in the upper right corner of the first round is moved to the upper left corner, the third round is moved to the upper right corner, and so on.
That is, the "0" or the maximum code in the odd wheel is in the upper right corner and in the even wheel is in the upper left corner. As follows:
Arrangement method of 7 teams' competitions
The first, second, third, fourth, fifth, sixth and seventh rounds.
1-0 0-5 2-0 0-6 3-0 0-7 4-0
2-7 6-4 3- 1 7-5 4-2 1-6 5-3
3-6 7-3 4-7 1-4 5- 1 2-5 6-2
4-5 1-2 5-6 2-3 6-7 3-4 7- 1
Whether the team is odd or even, the last round must be "0" or the largest code in the upper right corner, and "1" in the lower right corner.
According to the number of teams, when "1" moves a position counterclockwise, it should be moved at a specified interval (see table), and "0" or the maximum number of symbols should be moved before "1".
intermittent motion
Number and interval of teams
Less than 4 teams 0
Team 5 ~ Team 6 1
7~8 team 2
9~ 10 team 3
1 1~ 12 Group 4
When "1" moves at intervals, when it encounters "0" or the maximum number of symbols, it should be crossed first without interval calculation.
Generally speaking, in domestic competitions, the number of names obtained by each team in the previous game is used as the code, such as "1" for 1, "2" for the second place, and so on. Most world competitions use the host code "1", and finally 1 is named "2", and so on. Some competitions also use lottery to determine the code.