The highest I’ve seen, and no hassles to load. The map does not appear to be old either. See http://vk.com/doc10313313_274995642?hash=45e612f534fcc2018d&dl=51f79608ff87eb5a40
Found at pereformat.ru, a collection of historic, linguistic, and political articles and essays distinguished present-day Russian authors. Makes one realize just how far we are here from the Moscovy Khanate and close to Europe.