The echo of Bobby Fischer's 19.Rf6
It is not easy to be creative in chess. Lots has been done already in the past. But the good thing is that by studying chess games from others, ideas can be reused in your own games.
Like the blocking 19.Rf6!! move from Bobby Fischer against Pal Benko.
That move prevented f7f5, but in general it also prevents possible defense over the a7-h7 line.
Today I could also play Rf6 to prevent some of the opponent defenders to defend.
First Fischer's game :
See also the Fischer game and comments here :