It's from a real game.Possibly 2,but there's some doubt about that.You can read the story and analysis of the position here:
1....,Rxb2 is correct.However,it's still not that easy to queen,white has a few more tricks.
The position I gave here is slightly altered,as it is usually given in books.Not sure why they alter it but I figured it safest to just copy it that way.In Ortueta-Sanz black had 2 extra pawns.In Tylkowski - Wojciechowski black had 1 extra pawn.
Anyway,you can read it all at the above mentioned site.
It's truly awesome,isn't it?