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There are no specifics in the discussion. All that is needed is:
1) to know in advance how many participants there will be,
2) to know the number of days the tournament will last.
And this needs to be known in advance - as I wrote yesterday - for this, preliminary registration and a ready-made tournament regulation are needed.
And it is not very difficult to adapt the regulation to the number of participants.
Maybe - double elimination
you can have groups of 4 people + playoff in an Olympic format
You can have groups of 5+ people (where games are played in a Swiss system, for example, in 3 rounds), followed by semi-finals + final.
The main thing is that a specific version of the regulation should be developed before the start of the CIS tournament.