Story of unexpectedly high (400+) Elo rising in few months (reaching 2500 Elo mark) I'm sorry for being vague, but that's exactly my problem: I can't find an online blog post of a German/Scandinavian master anymore which illustrated a case of a young boy from Eastern Europe who managed to reach 2500 mark (in a few months time span) thanks to some suspect tournaments and timing.
His coach fine-tuned everything to exploit the delay in updating the Elo list, combined with an excellent performance on a local tournament.

Does anyone can recall a similar story?

I'd really love to read the post again. It was backed up with data from the FIDE official site.
Ok, I finally got it!!!
Here is the link I've been looking for:
Zibbit's blog