Phil Innes wrote:
...
I work with a chess developer in Russia and I give the URL below,
however, perhaps this material may also be available locally to you
in Poland?I did not list everything but maybe you find something
specific to Scottish and Italian opending systems? Good luck!

www.ruschess.com

Ciao! Phil Innes

Wow, thanks a lot for such a comprehensive answer!!! I shall check the hints
you gave me as well as the WWW link. If I have more doubts about it, I am
going to come back here and ask you again. By for now.
Regards,
Stefek