Paucity of information, promising more details ...
although the time and was almost gone.
The only thing I've heard that the official opening such as 17 May (before running in a closed mode):
http://www.tretyakovgallery.ru/ru/ca...hibitions2614/
Maybe someone knows more - so to add.
Added after 9 minutes 47 minutes
Specified in the State Tretyakov Gallery: Opening of the exhibition and the opportunity to become familiar with it will have from May 10 and 17th will mark the opening, and others with words.