There are 15 participants in the tennis singles competition. The competition system is as follows: one set system (short set system), and now four venues are provided. If you are the organizer, how do you organize it?
The knockout stage can be divided into four and a half regions of ABCD according to the position of 16, and one person can bye, which can give the top seed. In the first round of seven innings, the four pitches were 1, 2, 2, 2.
In the second stage, lots can be drawn or areas A to B, and areas C to D can be arranged, and in the third stage, four can enter two.
Final argument
If it is a round robin, it can be divided into four groups, namely four groups, four groups and three groups. There will be one round robin for each group, and the group will eliminate the cross elimination first and make the final.