I wonder about this myself. If the theory behind it is that it's drawish, then why hasn't Grischuk played it in the Candidates?
d4 without c4
c4 applies pressure on the center. I would say that if you want to play for a win, you need more than one pawn in the center. That being said, there are plenty of other ideas out there that at our level works great, with only one pawn in the center (KIA, Colle, etc.), but at the upper levels, they generally prefer greater central control. Plus, playing c4 gives them an opportunity to seek an open c-file.
I wonder about this myself. If the theory behind it is that it's drawish, then why hasn't Grischuk played it in the Candidates?
I see what you did there.
I'm running into alot of players who play d4 openings, but don't play c4. Going by the master games I have studied, I am guessing that c4 needs to be played, according to theory. Is this true? Is there a way to capitalize when the opponent doesn't play c4?