The d5 hole in the sveshnikov


Might want to check out 4 games between Geller and Smyslov versus Sveshnikov in 1977 and 1978. I think the four demonstrate Sveshnikov's basic ideas for the opening pretty well.
My take is that Black gives up the obvious d5 and d file weakness for hopefully active counterplay. Counterplay mainly due to better mobility relative to other Sicilians. In some cases, literally giving up d for benefits in other areas.