Hello and thank you for reading my post

I'm running a Poker Tournament where teams of 4 players each, compete over "

*3 rounds of play*". During these "

*3 rounds of play*" each player would play another player (from another team) only once and never play against someone from their own team. I have already figured out a schedule if there were 12 teams, 14 teams, 15 teams and 16 teams. However, 13 teams (a prime number) seems to be more difficult. I also haven't been able to figure out how to run a Tournament if there is an amount of teams that is not 12, 14, 15 or 16. But, thanks to this website, I now have a schedule for 4 teams.

I ask if you can please help me figure out a mathematical formula for an unknown amount of teams, 4 players per team, where players compete against others

**only once** and

**never** against their own team mates.

Thanks again for reading this post

DaveTheMaori