In the first round, draw lots first. Assuming this round is empty, then Party A, Party B and Party D will play a game, and then there will be two winning teams, and Party D will be the losing team.
Next, the two winning teams will have a game, and the two losing teams will have a game.
In the second round, the team that lost two games in a row will be eliminated. Mao and the remaining teams A, B and C each played a game.
At this time, the remaining four teams played three games each.
In the third round, if a team has won three consecutive victories, it will directly enter the finals to compete for the first and second place. Two of the remaining three teams must have the same winning performance. If the victory is two games, then the two teams will only fight for one game. The winner will compete for the first and second place, and the loser will compete for the third and fourth place. If there are only two victories, then these two will compete for three or four places, and the other two will compete for one or two places.
If there is no three-game winning streak, then if you win two games, there will be three or four players left in one game.
Maybe so. I don't know if you understand what I said. Finally, there should be five situations, depending on the situation, O (∩ _ ∩) O.