Great! But how did you come below 1600?
So I played JUDITH POLGAR and almost won..

instead of taking c3 going to b6 is probably best, cause there is a lot of pressure on White's center, especially d4

You play the Grunfeld? Nice. What do you do against this?
Black has many lines to chose from. f.e. 7... c5 8. d5 Bxc3+ 9.bxc3 ect. It is a solid line for White, but it is not ambitious; it is drawish.

You play the Grunfeld? Nice. What do you do against this?
Black has many lines to chose from. f.e. 7... c5 8. d5 Bxc3+ 9.bxc3 ect. It is a solid line for White, but it is not ambitious; it is drawish.
Doesn’t that line give up the good black bishop?

You play the Grunfeld? Nice. What do you do against this?
Both Nb6 or taking on c3 followed by c5 looks good. I think vishy anand recently played this line from white against Nepo and won.

You play the Grunfeld? Nice. What do you do against this?
Black has many lines to chose from. f.e. 7... c5 8. d5 Bxc3+ 9.bxc3 ect. It is a solid line for White, but it is not ambitious; it is drawish.
Ya..but I think this Bd2 line is becoming popular these days(?).

You play the Grunfeld? Nice. What do you do against this?
Black has many lines to chose from. f.e. 7... c5 8. d5 Bxc3+ 9.bxc3 ect. It is a solid line for White, but it is not ambitious; it is drawish.
Doesn’t that line give up the good black bishop?
Tbh that's the line I play
Judith Polgar played 20 opponents(simul) as part of The Global Chess Festival 2020. I got the chance to play with her after I won a below 1600 selection tournament.