How about in terms of # of moves? How deeply does one need to memorize to know enough theory to play at the Class A level? 10 moves per line? 20 moves per line?
I understand that some lines are more theoretical and require more memorization. So, an overview of which lines are more theoretical and which ones are less theoretical would be helpful.
Thanks.
I heard that there is a lot of memorization that must be done if one wants to play the Grunfeld as Black. One can't simply rely on general principles or even more position-specific "plans" but must know specific moves at specific junctures in the game.
Is that true? If so, how much memorization does one really need to do if one wants to play the Grunfeld well in Class A and above chess (ELO 1800+)?