If you need some help with MIDNIGHT ESCAPE, here you can find the answers for all the riddles.
Obviously, this article is full of spoilers, so if you want to finish the game on your own, stop reading now. Otherwise, go on.
This is the only random riddle in the game, so there is no unique solution. Just take a look at the walls of the rooms next to the lever room and you'll get the right combination.
THREE CIRLCES RIDDLE
You can find a solution (there are more of them) in the basement. For example, you can follow this sequence:
left, center, 3 times left, 3 times center, 3 times left
White in B6, Black in F5
LIE DOWN AND STAND STILL
Put your phone/tablet on a table (or a plain surface) and wait a couple of seconds
Enter 1124. You can find the anwser in the first floor, on a painting (you can read "hell", but it's 1124 upside-down)
Some of the symbols may look like reversed letters. Just put the reversed "N" in the north point, "E" on the east one, "SE" on the south-east, then "SO" (more like a S inside a O) and "O".
ENTER ONLY TODAY
Just insert the current date, in the format DDMM (day/month)
SAY MY NAME IF YOU WANT TO ESCAPE
The name of the "lady" is Magdalene (you can find it in some notes). You have to insert the number 163562404 (you can find the code after the chess riddle)
And here we are: you have completed midnight escape!
PS: the old entries (and all the comments) with hints and helps seems to be lost, really sorry!