Spider and Web

Had no clue from the start, tried to read the beginning of the walkthrough 5 minutes later(the existence of the walkthrough itself shows a fatal weekness in the design)... didn't manage to find some interesting pattern to play with.
This could have been interesting, if it was playable, or at least not frustrating right from the start.
I think there is something to learn here.
I wouldn't like a book with "Let's have fun! Guess the number of the second page." as the first paragraph.