function toInt(obj) {
  return function (prop) {
    if (typeof obj[prop] != 'undefined') obj[prop] = NumberInt(obj[prop]);
  };
}
// db.tournament.find({_id:'fefNHKaL'}).forEach(function(tour) {
db.tournament
  .find()
  .sort({ createdAt: -1 })
  .forEach(function (tour) {
    ['status', 'mode', 'variant', 'system', 'minutes', 'minPlayers'].forEach(toInt(tour));
    if (tour.pairings)
      tour.pairings.forEach(function (pairing) {
        ['s', 't'].forEach(toInt(pairing));
      });
    if (tour.players)
      tour.players.forEach(function (player) {
        ['rating', 'score'].forEach(toInt(player));
      });
    if (tour.events)
      tour.events.forEach(function (event) {
        toInt(event)('i');
      });
    if (tour.clock) ['limit', 'increment'].forEach(toInt(tour.clock));
    db.tournament.update({ _id: tour._id }, tour);
  });