Hi guys, 
just a quick question: 
I am looking right now at the Gruenfeld exchange with Be3 and Nf3. From a practical perspective I think the lines with an early ...Qa5 make a lot of sense as this move gives the game a more forcing character.

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Be3 c5 8. Nf3 Qa5

I am happy if White goes for 9.Qd2. But in the move order with Nf3 White can also play 9.Nd2. This move allows White a perpetual if Black plays a simple developing move e.g.

[Date "2021.05.30"]
[Round "3.11"]
[White "Radjabov, Teimour"]
[Black "Nepomniachtchi, Ian"]
[Result "1/2-1/2"]
[ECO "D85"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 8.
Be3 Qa5 9. Nd2 O-O 10. Nb3 Qxc3+ 11. Bd2 Qb2 12. Bc1 Qc3+ 13. Bd2 Qb2 14. Bc1
Qc3+ 15. Bd2 1/2-1/2

The fighting choice for black after 9.Nd2 is ...cxd4 which simply avoids the repetition. There are many games after 9.Nd2 cxd4 10. Nc4 Qd8 and black gets counterplay with a timely f7-f5.
This is certainly playable but the engines don´t love black in a lot of lines. There was one very interesting game by Nils Grandelius in which he went for 10...Qa6!?. This is preferred by my engine (at least on low depths) and Nils made an easy draw. But surprisingly enough this line has not been repeated since that game. Does anyone know why?

[Event "FIDE Chess.com Grand Swiss"]
[Site "Douglas"]
[Date "2019.10.18"]
[Round "8"]
[White "Nguyen, Ngoc Truong Son"]
[Black "Grandelius, Nils"]
[Result "1/2-1/2"]
[ECO "D85"]
[WhiteElo "2638"]
[BlackElo "2691"]


1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. Nc3 d5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 c5 8.
Be3 Qa5 9. Nd2 cxd4 10. Nc4 Qa6 11. cxd4 O-O 12. Rb1 b5 13. Nd2 Bd7 14. Qb3 Rc8
15. Nf3 Qb7 16. Bxb5 Bxb5 17. Qxb5 Qxe4 18. O-O a6 19. Qb3 e6 20. d5 Qxd5 21.
Qxd5 exd5 22. Rfd1 Nc6 23. Rxd5 Rab8 24. Rxb8 Rxb8 25. g3 Bf8 26. Ne5 Nxe5 27.
Rxe5 Rc8 28. Rd5 h5 29. a4 Be7 30. Bb6 Rc6 31. Bd8 1/2-1/2

Thanks in advance!