Engine-assisted game vs Stockfish, move 21 discussion

[MooMoo2]

The most popular move on the move 20 poll was ...Kh8. Stockfish played 21. Qd2, and the FEN is:
2rq1r1k/6bp/2npb3/1p1N1p2/4p3/2P5/1PNQBPPP/R4RK1 b - - 3 21

Game so far: 1.e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 d6 7. Bf4 e5 8. Bg5 a6 9. Na3 b5 10. Bxf6 gxf6 11. Nd5 f5 12. c3 Bg7 13. Bd3 Be6 14. Nc2 O-O 15. O-O fxe4 16. Bxe4 Rc8 17. a4 f5 18. axb5 axb5 19. Bf3 e4 20. Be2 Kh8 21. Qd2

Depth: 51 ply. Nodes searched: 1,033,580,272,025 (~1034 G)

[WMHalsdorf]

I'm considering Na5
This is as far as I got.

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 d6 7. Bf4 e5 8. Bg5
a6 9. Na3 b5 10. Bxf6 gxf6 11. Nd5 f5 12. c3 Bg7 13. Bd3 Be6 14. Nc2 O-O 15. O-O
fxe4 16. Bxe4 Rc8 17. a4 f5 18. axb5 axb5 19. Bf3 e4 20. Be2 Kh8 21. Qd2 Bxd5 (
21... Na5 22. Nf4 (22. Ra3 Be5 23. f4 exf3 24. Rxf3 Nc4 25. Bxc4 bxc4 26. Nf4
Bf7 27. Ne3 Qb6 28. Kh1 Ra8 29. Nfd5 Bxd5 30. Qxd5 Rxa3 31. bxa3 Qb1+) 22... Nb3
(22... Bc4 23. Bxc4 (23. Nd4 Qb6 24. Bxc4 Nxc4 25. Qc1 Be5 (25... Bxd4 26. cxd4
Na3 27. Qd2 Nc2 28. Ne6 Nxa1 29. Nxf8 Rxf8 30. Rxa1) 26. Ra2 Rg8 27. Nxf5 Qb7
28. b3 Rcf8 29. Ne3 Bxf4 30. bxc4 bxc4) 23... Nxc4 24. Qe2 Rg8 25. Qh5) 23. Nxe6
Nxd2 24. Nxd8 Nxf1 25. Ne6 Nd2 26. Nxf8 Rxf8 27. Bxb5) 22. Qxd5 b4 23. Nxb4 Nxb4
24. cxb4 Rc2 25. Bc4 Rxb2 26. b5 Bc3 27. Ra7 Qf6 28. g3 (28. Ra8 Rxa8 29. Qxa8+
Kg7 30. b6 d5 31. b7 dxc4 32. b8=Q Rxb8 33. Qxb8 Bd4 34. Qc8 c3 35. Ra1 Qf7 36.
Ra5 Qe7 37. Qxf5 c2) 28... Bd4 29. Rc7 Rd2 30. Qb7 Qh6 31. Rc8 Qf6 32. b6 d5 33.
Rc6 Qe5 34. Rh6 Qg7 *

[gd_barnes]

After over a day of looking here is what Komodo 10 recommends for the top two moves at 39 ply:

21...Be5 22. f4 Bxd5 23. Qxd5 Qb6+ 24. Kh1 Bg7 25. Qxb5 Rb8 26. Qxb6 Rxb6 27. Ra2 Rfb8 28. b4 Bxc3 29. b5 Nd4 30. Nxd4 Bxd4. Score: .00

21...Bxd5 22. Qxd5 Be5 23. Bxb5 Ne7 24. Qd2 Qb6 25. Nd4 Bxd4 26. Qxd4+ Qxd4 27. cxd4 Rc2 28. g3 Rxb2 29. Ra7 Nc8 30. Rb7 d5. Score -.01


I would go with 20...Be5