code: function playerPairingFilter (tnmt) {
    return function (pairing) {
      // board number too high?
      if (tnmt.general[35] && pairing[4006] > tnmt.general[34]) { return false }
  
      // no color set?
      if (pairing[4000] === '4000-0') { return false }
  
      return true
    }
  }
docs: Filter function to remove dummy player pairings.
  @param  {Object} pairing
  @return {Boolean}         true -> valid pairing