From #openttdcoop wiki
Some things we need to define for a Coopetition-Tournament:
- First of all, the games need to be shorter than "standard-coopetition-games".
- A coopetition tournament should take from 1 day (very short tournament with elimination games only) to 1 week (group + elimination games)
- A tournament may take up to a week
- A full tournament starts with a group-phase and therefore may start with many numbers of teams. For example: If 6 teams join a tournament, two groups with 3 teams each will be defined. In each group, every team plays against each other. Therefore, every team plays at least two games. Out of every group, the best two teams play take part in the elemination games. First of group A plays against second of group B and vice versa. You can form a tournament plan like this for almost every even amount of teams.
- It may be considered that a Tournament counts for the ELO-rating and the ELO-rating before a tournament help on the equable allocation of teams to the groups. (If the best and the second best team of the ladder take part in a tournament, they should not be in the same group)
- The group games should not have a fixed schedule but should start whenever it is possible for the teams. There should be a deadline for teams to complete the group-phase of the tournament and give penalties if a team has not time to play.
Possible ELO-adjustments after a Tournament
- All teams which take part in a tournament gain a small amount of ELO (like: +20)
- Teams which reach the elimination rounds gain another bunch of ELO (+ 10-15?)
- 3rd in the tournament gets additional +5
- 2nd gets additional +10
- 1st gets additional +15
Which means: the winner receives some 45-50 ELO
Attractiveness of a Tournament
- The $attractiveness of a tournament is determined by the average of ELO-ratings of all participating teams!!
- The $basepoints depend on the success of a team, i.e. first round = 3, second round = 4, 3rd place=5, 2nd place=6, 1st place=8;
- [ $basepoints + ( 1+ ($k / 64))^2,5 ] ^ ( $attractiveness / ELO )
- Teams better than the average attractiveness gain less points, worser teams gain more!
- Due to exponential factors, the ELO-earnings are very accurate to your current ELO-score