OK. I figured out the way. Checked the walkthroughs and to my slight surprise found out that it's the only
So my question is: are there any hints about solving this found in anywhere in game (any notes on the wall)?
If not, then just how is the player expected to find it out?? It's very counter-intuitive. It makes use of an exploit of the game mechanics. And it just feels wrong.
Welcome to the club.
AFAIK there are no in-game clues.
I wish I could remember how I solved the problem the first time I completed the game, before Internet.