The grunfeld 5.nf3

nf3 is best move fur black

are you serious?

Three Knights: Burille Variation.

• The best and most popular for black is 5...O-O.
• White could continue with 6. Be2, cxd5, Bd2, b4, Qb3. 

Im not serious

there are other variations @Yigor, do you have any options? instead of 0-0, maybe black could play 5...c5 ?

MAYYBE BLACK COULD PLAY C5 THEN QB6 THEN TAKE ON B2

Thanks for the input! This will help my grunfeld a lot

• There are few suboptimal variants 5...a6, b6, c6, e6.
• 5...c5 seems to be an inaccuracy where white should reply 6. dxc5.

ok

e6?

e6 bishop blocked

Yes, but bishop b7 and now it's in a better position. 

oh ok

5...c6 the slav schlecter is quite ok for black too. Just leads to a slower game, than a typical grunfeld player likes, perhaps.