private void unlock(Location l) {
		if (board.containsLocation(l) && board.tileAt(l).getOn() != null
				&& board.tileAt(l).getOn() instanceof Lockable) {
			((Lockable)board.tileAt(l).getOn()).setLocked(false);
			for (int id: playerIDs.keySet()) {
				server.queuePlayerUpdate(new UnlockEvent(l), id);
			}
		}
	}