Part 3 of GM Perelshteyn's offbeat approach against the Sämisch shows that if you are flexible with your pawn structures, you can catch White out of his theoretical knowledge. The grandmaster plays a pair of games in which White does little to restrict ...b5, and Black liquidates the center with ease in both cases. After that the active Black army mops up. Watch this series and you'll see that there is nothing to fear but fear itself - and certainly not the f-pawn.