A total of 17 teams hold a badminton match, which is divided into four groups: AB C D. How to draw lots is fair and reasonable? I want to design one

Drawing lots is not a difficult problem, the key is that you have the basis of the team. For example, last year's top four teams are a good foundation, and these four teams can be regarded as seed teams. If you have other basics, such as geography (teams from the same place are not in the same group), etc.

Because there are 17 teams in total, but they are divided into four groups. If one group is divided equally, there will be one more team.

Draw lots: Since you haven't provided any other division methods at present, all teams except the top four will be divided into first-class teams, and all others will enter mixed-class teams. Four groups, group A has five teams, and groups B, C and D have four teams.

The whole lottery is divided into two stages. In the first stage, teams of mixed levels are drawn out first. In the second stage, draw the first-class team. The method is 17 team to sign. According to the order of ABCD, one sign and one draw, corresponding to a team into different groups.

Since you didn't specify at which stage to arrange the resurrection match, I can only say my thoughts. Generally speaking, the resurrection match is a play-off match for teams that don't want to play, but don't want to be eliminated because of their poor performance before. Therefore, in the competition system, we should give some concessions to the teams that played well before (for example, we can play fewer games, or have the advantage of leading the score with the resurrected teams in the following games, and so on). ).

My idea is that in the group stage, the first place in each group will be promoted directly. The team advanced to the resurrection second. Four teams were the first to be eliminated. The winner advances to the semi-finals, and the loser enters the resurrection. And four teams were eliminated in pairs first. Two losers were eliminated directly, and two winners and the team that lost in the first game of the group were eliminated in pairs, competing for two resurrection places. The winner entered the semi-finals.

In the semi-final, the winning team in the first round of the group competed with two revived teams for the final place. The team that won the first game in the group led by 1 point in the best of five games (1 point is free). The winner of the last two semi-finals enters the final to decide the champion.

There are still questions. I hope I can help you when I reply.