I read in a book (I no longer remember what book) that there are a few traps for White in the
1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 variation vs the Grunfeld, and that the line is somehow popular among GMs, Black has no easy equality, etc. etc. Is anyone aware of what a few of these tricks / traps for White might be?
For example please notice GM Kavalek's comments after Bf4 in this article: