under construction

knockout

you need a number of coaches that is a power of 2, so 4, 8, 16, 32 and so on if you lack coaches you can use filler teams, the dummy user TourneyFiller? is an example of how that looks but league managers often have their own filler teams on their profiles

King of the hill

like knockout but the second round isn't seeded until the first round is fully played, this is also true for the third round if the tournament has 16 players, and so on

double elimination

same number of participants required as for knockout

round robin

there's no requirements to have an even number of coaches, if the number of coaches is odd one coach per round sits the round out

the number of rounds:

there is a natural upper bound on the number of rounds of a Swiss-system tournament, which is equal to half of the number of players rounded up.

Another guideline is log2(n)+1. Basically one more than a KO would be.

swiss

is there a requirement to have an even number of coaches?

each round isn't seeded until the previous one is fully played