What's the difference between the single round robin system and the single round robin elimination system?

Single cycle means that all participating teams can meet once in the competition, and finally rank according to the scores and the number of winners and losers of each team in the competition. Generally speaking, there are not many single cycles for the participating teams, and there is enough competition time to use them. Single round robin is a fair and reasonable competition system, because all participating teams have the opportunity to meet. 1) Calculation of the number of rounds and games in a single round robin ① Round robin: In round robin, each team completes one game. When the number of teams is odd, the number of rounds is equal to the number of teams. If there are five teams participating in the competition, the number of rounds in the competition is five. When the number of teams is even, the number of rounds is equal to the number of teams minus one. If there are six teams participating in the competition, the number of rounds in the competition is five. ② Games: The single-cycle games can be calculated by the following formula (simple mathematical combination formula): Games = number of teams * (number of teams-1)/2 If there are 6 or 7 teams participating in the games, the games will be 6 *(6- 1)/2 = 15. If the team is odd, add a "0" after the team number to make it even. The team that met 0 had a bye. When arranging, the team is divided into left and right 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 from bottom to top in numerical order, and then connected by horizontal lines to form the first round of competition. From the second round, there are many ways of rotation. There are two commonly used methods: (1) fixed rotation arrangement method, also called conventional rotation method, which is a traditional arrangement method in China. Table 17-6 is a round table of seven teams. When the number on the left is fixed, it rotates counterclockwise and is discharged one by one. As shown in the table:

(There is no link in the picture) (2) "Berger" arrangement method Since 1985, "Berger" 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 top to bottom, 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. The competition arrangements of the seven teams are as follows: the first round, the second round, the third round, the fourth round, the fifth round, the sixth round and the seventh round1-00-52-00-63-00-74-02-76-43-1-65-33. 1 2-56-24-51-25-62-36-73-47-1No matter whether the team is odd or even, the last round must be "0" in the upper right corner or the largest symbol, 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". The number of teams moving at intervals is less than 4 teams, 0.5 ~ 6 teams, 1.7 ~ 8 teams, 2 9~ 10 teams, 3 1 ~ 12 teams and 4 "1". When moving at intervals, you should first cross "0" or the maximum number of symbols. 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. The following figure