Way to see your opponents fave chess openings

i could have sworn that someone posted a link to a page that then printed out a pdf about the opponents chess openings and how to combat it

it would then go thorugh all your opponents chess openings and then print a summary of it in a pdf

could someone post the link here?

www.openingtree.com/

(It's so powerful - Eric Rosen)

Not a pdf though, but much better.

ChessBase does the job. Export & import.