This is more of a logic question than a coding question, but for everyones information I'm working in Javascript.

I need to programmatically create a 14 week schedule between 12 teams that abides by the following rules: -Each team plays each other team at least once. -No team plays another team more than twice -Each team plays 14 games

I tried looping through the each player, creating the matches for each week (Game 1 - Player 1 against Player 2, Game 2 - Player 1 against Player 3 etc.) and then checking that the current player isn't already playing in a game so (Game 1 - SKIP (Player 2 already playing), Game 2 - Player 2 against Player 4 (player 3 already playing), Game 3 - Player 2 against Player 5) so on. So it creates the entire schedule for one team, then moves on to the next team etc.

Works fine, BUT when I add the logic to check that no player plays another player more than twice it breaks and enters an endless cycle.

I tried going through each Week and creating the matchups like that (Game1 - Ply1 vs Ply2, Game2 - Ply3 vs Ply4, Game3 etc. checking that the player is not already playing a game, but again it broke when adding the qualifiers.

Any suggestions or pointing in the right direction is much appreciated! I can store the UserIDs in key value pairs or as an array so those are not limiting factors in any solution.

Desired Final Result is something like this:

Schedule:{
  Week1:{
    Game1:{
      Play1: somePlayer,
      Play2: someOtherPlayer
    },
    Game2:{
      Play1: somePlayer1,
      Play2: someOtherPlayer1
    },
    Game3:{
      Play1: somePlayer2,
      Play2: someOtherPlayer2
    }
    //etc. and so on with 6 games per week for 14 weeks.
  }
}

Basic skeleton of the solution that got me the closest(first method):

let userArray = [1,2,3,4,5,6,7,8,9,10,11,12]
let schedule = {}

for(let x=0; x < userArray.length ; x++){
  for(let y = 0; y < 14; y++){
    //Check if schedule['WK'+y] exists and if not create it.
    //Check if userArray[x] is playing in any existing games in schedule['WK'+y]
    //Check if userArray[x+1] is playing in any existing games in schedule['WK'+y]
      //IF YES - TRY userArray[x+2] etc (loop back to 0 if x+y is >12)
      //IF NO - CREATE schedule['WK'+y]['Game'+x] = {Play1: userArray[x],Play2:userArray[x+whatever is accepted]
  }
}