mutex concept

gistfile1.js

'use strict'

var mutex = require('mutex') // (this doesn't exist, it's just an illustration)

var playerMutexes = getPlayerMutexes() // (as above)
var gameBoardMutexes = getGameBoardMutexes() // (as above)

var getPairs = function(arr) {
  var results = []

  for (var i = 0; i !== arr.length; i++) {
    for (var j = i + 1; j !== arr.length; j++) {
      results.push([arr[i], arr[j]])
    }
  }
  
  return results
}

Promise.all(getPairs(playerMutexes).map(function(pair) {
  return mutex.and([
    pair[0],
    pair[1],
    mutex.or(gameBoardMutexes)
  ]).lock().then(function(mutexHandle) {
    var gameBoard = mutexHandle.value[2]
    var playerA = mutexHandle.value[0]
    var playerB = mutexHandle.value[1]
    
    return gameBoard.play(playerA, playerB).then(mutexHandle.release)
  })
})).then(function() {
  console.log('Everyone finished playing everyone else')
})