I do not recommend booking Ulanskaya Hotel (Ulansky Pereulok, 16) in hot summer time. Instead of air conditioning, promised by hotels-world.com or booking.com, just a fan will wait for you in the room. The window could be opened, but it was 29C degrees (84.2 F) outside in the shade today. In order to make your stay as pleasant as possible an additional heating system is used: overheated towel rail turns the shower room into a steam bath.
The hotel says it is located 20mins walk from Red square. I can’t imagine anyone, who can do it for 20mins. It is a good time for a sprinter.
I believe information should be real.