[Event " 17.ef5: 21...Ld7"]
Dont know if this is pgn-file. I copy it 
Some of my analysis. It seems that 23...Tde8 is best.

{'62/(176) '} 1. e4 {0} c5 {0} 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Nf6 6.
Nc3 Bg7 7. Be2 Nxd4 8. Qxd4 d6 9. Be3 O-O 10. Qd2 Be6 11. Rc1 Qa5 12. f3 Rfc8
13. b3 a6 14. Na4 Qxd2+ 15. Kxd2 Nd7 16. g4 f5 17. exf5 gxf5 18. h3 Rf8 19. f4
Rad8  Nc5 21. Nc3  Bd7 22. Bf3 Bc6 23. Nd5 (23. Bxc6 bxc6
24. Bxc5 dxc5+ 25. Kc2 e5 26. fxe5 Bxe5 $11) 23... Rde8 (23... Rd7 24. Bxc5 (
24. b4 Ne4+ 25. Bxe4 fxe4 $11) (24. Rhe1 e6 25. Bxc5 exd5 26. Bb4 dxc4 27. Bxc6
bxc6 28. Rxc4 c5 $11) (24. Nb6 $4 Bxf3 25. Nxd7 Nxd7 $19) 24... dxc5 25. Rhe1
Re8 (25... Rfd8 26. Re6 Kf8 27. Rce1 Bd4 28. R1e2 a5 29. Ke1 Re8 30. Bg2 Red8
31. Kf1 Re8 32. h4 Bxd5 33. Bxd5 Kg7 34. h5 Kh8 35. h6 Bc3 36. Kg2 Ba1 37. Bf3
Kg8 38. Bh5 Kf8 39. Bxe8 Kxe8 40. Rb6 Bc3 41. Rb5 Kf7 42. Rxc5 e6 43. g6+ {1-0
Kuiper,J (2555)-Bochev,K (2479)/ICCF email 2005/Corr 2008}) 26. Re6 Kf8 (26...
Rd6 27. Rxd6 (27. Rce1 Rxe6 28. Rxe6 Kf8 29. Ke2 Bd4 30. Ne3 Bd7 31. Rb6 e5 32.
Bh5 Re6 33. Rxe6 Bxe6 34. fxe5 Bxe5 35. Bf3 {1/2-1/2 Saatdjian,T (2181)
-Edouard,R (2363)/Aix les Bains 2006/EXT 2007}) 27... exd6 28. Nc7 Re7 29. Bd5+
Kf8 30. Ne6+ Kg8 31. h4 Bxd5) 27. Rce1 Rd6 (27... Bxd5 28. Bxd5 Rdd8) 28. Rxd6
(28. R6e2 e6 $11) 28... exd6 29. Rxe8+ Kxe8 $11 30. Nc7+ Kd7 31. Bxc6+ bxc6 (
31... Kxc7 32. Bd5 $14 h6 33. Ke3 Bd4+ 34. Kf3 Bg7 35. Kg3 b5 36. Kh4 hxg5+ 37.
fxg5 Kd8 38. Kh5 Be5 39. Kg6) 32. Nxa6 Kc8 33. b4 Kb7 34. b5 cxb5 35. cxb5 Kb6
36. a4) (23... Rf7 24. Rhe1) 24. Rhg1 (24. Bxc5 dxc5 25. Rhe1 e6 26. Nf6+ Bxf6
27. Bxc6 Rd8+ 28. Kc2 bxc6 29. gxf6 Kf7 30. Re5 Rd4 31. Rxc5 Rxf4 32. Rxc6 Rf2+
$13 33. Kb1 f4 34. Rxa6 f3 35. c5 Re2 36. Ra4 f2 37. Rf4 e5 38. Rf5 Ke6 $17) (
24. Bh5 e6 (24... Bxd5 25. cxd5 Rc8) 25. Nf6+ (25. Bxe8 Rxe8 26. Nc3 Bxh1 27.
Rxh1 Kf7 28. h4 h5 $11) 25... Bxf6 26. gxf6 Bxh1 27. Rg1+ $1 Kh8 28. Bxe8 Rxe8
29. Bd4 (29. Rxh1 Ne4+ 30. Kd3 Nxf6 $15) 29... Rd8 (29... Rf8 30. Rxh1 (30. f7+
e5 31. fxe5 Ne6 32. Bc3 d5 33. Rxh1 dxc4 34. bxc4 Rxf7 35. Rb1 Rd7+ 36. Ke3 Kg8
37. Rb6 Kf7 $11) 30... Rf7 31. Rg1 (31. Ke2 Kg8) 31... h6 32. Ke3 Kh7 33. h4
Nd7 34. Rd1 Kg6 35. Bb2 Nxf6 36. Rxd6 Re7 37. Bxf6 (37. Rb6 Ng4+ 38. Kd4 Kh5
39. Kc5 Rd7 40. Rxe6 Kxh4) 37... Kxf6 38. Rd8 Rg7 39. Rf8+ Kg6 40. Kd4 Kh5 41.
Rf6 Rg2 42. Rxe6 Rxa2 $14) 30. Ke2 e5 (30... Bc6 31. f7+ e5 32. Bxc5 (32. fxe5
Ne6 33. Bb2 h5 $15) 32... dxc5 33. fxe5 Rf8 34. e6 Be8 35. Rg5 (35. fxe8=Q Rxe8
36. Kf3 Rxe6 37. Rg5 b6 38. Rxf5 Kg7 $11) 35... Bxf7 36. Rxf5 Kg7 (36... Re8
37. Rxf7 Rxe6+ 38. Kf3 b5 39. Rc7 bxc4 40. bxc4 Re5 41. Rc6 a5 42. Ra6 Rh5 43.
Kg4 Re5 44. Kf4 Rh5 45. Kg3 Rg5+ 46. Kh2 $14) 37. exf7 b6 38. Kd3 Rxf7 39. Ke4
Rd7 40. Rd5 Re7+ 41. Re5 Rd7 42. Rd5 Re7+ 43. Kf5 Re2 44. Rd6 Rxa2 45. Rxb6 $14
) 31. Bxc5 dxc5 32. fxe5) 24... Ne4+ (24... e5 25. Nf6+ (25. fxe5 Rxe5 26. Bd4
Bxd5 27. Bxe5 Bxf3 $15) 25... Bxf6 26. gxf6+ Kh8 27. Bxc6 bxc6 28. Bxc5 (28.
fxe5 Ne4+ 29. Ke2 dxe5 30. Bh6 Rf7 31. Bg7+ Kg8 32. Ke3 Ng3 33. Bh6 f4+ 34.
Bxf4 exf4+ 35. Kxf4 Rxf6+ 36. Kxg3 Re2 $13) 28... dxc5 29. fxe5 Rxe5 30. Rce1
Rxe1 31. Rxe1 Rxf6 32. Re5 $14) 25. Bxe4 (25. Kc2 e6 26. Nb6 e5 27. Rce1 exf4
28. Bxf4 Be5 29. Bxe5 dxe5 $11) 25... fxe4 26. Nc7 (26. Nc3 b5 27. Nd5 bxc4 28.
bxc4 Bxd5 29. cxd5 Rf5 $15) 26... Rc8 27. Ne6 Rf5 28. Nxg7 (28. h4 Bb2 29. Rcf1
Bd7 30. Bd4 (30. Nd4 Ra5 31. a4 b5 32. axb5 axb5 33. cxb5 Bc3+ 34. Kd1 Ra1+ 35.
Ke2 Bxd4 36. Rxa1 (36. Bxd4) 36... Bxb5+ 37. Kf2 Rc2+ 38. Kg3 Bxe3 39. Ra8+ Kg7
$11) 30... Ba3 31. Ng7 Bb4+ 32. Ke3 Ra5 33. f5 Rxa2 34. g6 Rh2 35. gxh7+ Kxh7
36. Ne6 Bd2+ 37. Kxe4 Rxh4+ 38. Kd3 Bh6 39. Rh1 Rxh1 40. Rxh1 Bxe6 41. fxe6 Kg6
42. Rf1 Rf8 43. Rxf8 {1/2-1/2 Anderson,J (2410)-Lilleoren,M (2507)/ICCF email
2006/Corr 2008}) 28... Kxg7 29. h4 Kf7 30. h5 (30. a4 b5 31. cxb5 (31. axb5
axb5 32. c5 dxc5 33. Rxc5 Rxc5 34. Bxc5 Rd8+ 35. Kc2 Rd3 36. h5 Bd5 37. b4 Be6
38. Ra1 Bb3+ 39. Kb2 Ba4 40. Rf1 Rd2+ 41. Kc3 Rd3+ 42. Kb2 Rd2+ 43. Kb1 Rh2 44.
h6 e6 45. f5 exf5 46. Rxf5+ Kg6 47. Re5 Bb3 48. Kc1 Re2 $11) 31... axb5 32. a5
Rd5+ 33. Ke2 b4 $15) 30... Ke6 $11 31. a4 (31. Rh1 b5 32. Rcg1 bxc4 33. bxc4
Ra5 34. g6) (31. Rg2 Be8 32. Rh2 (32. g6 Rxh5 33. f5+ Rxf5 34. gxh7 Rh5 $15)
32... Bc6 33. Rg1 b5 34. cxb5 Bxb5 35. g6 Rd5+ 36. Ke1 Rd3 37. Rh3 hxg6 38.
hxg6 d5 39. g7 Kf7 $15) (31. Rcf1 b5 32. cxb5 Rd5+ 33. Ke1 Bxb5 34. Rf2 Rd3 35.
f5+ Kd7 36. Rg3 Rcc3 37. Re2 Rd5 
'Remis'} 38. Rf2 Rdd3 39. Re2 (39. f6 Rxe3+ 40. Rxe3 Rxe3+ 41. Kd1 Rd3+ 42. Ke1
exf6 43. gxf6 Rc3 44. f7 e3 $19) 39... Rd5 $11 {Remis}) (31. h6 Kf7 $11 32. b4
a5 33. a3 Kg6 34. Kc3 d5 35. Kb2 (35. c5 axb4+ 36. axb4 d4+ 37. Kxd4 Rd8+ 38.
Kc4 Rd3 39. Rge1 b5+ 40. cxb6 Bb5#) 35... axb4 36. axb4 d4 37. Bxd4 Rxf4 $11)
31... Be8 (31... d5 32. Ke2 dxc4 33. Rxc4 Rd8 34. Rd4 Rxd4 35. Bxd4 Rxf4 36. g6
hxg6 37. hxg6 Rf8 38. g7 Rg8 39. Ke3 Bd5 40. b4 Bb3 41. a5 Bd5 42. Rf1) 32. Rh1
(32. g6 Rxh5 33. g7 Bg6 $15) 32... Kf7 33. Rh4 (33. Kc3 b5 34. axb5 axb5 35.
Kd4 bxc4 36. Rxc4 Rxc4+ 37. bxc4 Ra5 38. g6+ hxg6 39. h6 Kg8 40. h7+ Kh8 41.
Kc3 Ra3+ 42. Kd2 Bd7 43. Bd4+ e5 44. Bb2 Ra2 45. Kc1 Rxb2 46. Kxb2 exf4 $17)
33... b5 34. cxb5 Rd5+ 35. Ke1 Rxc1+ 36. Bxc1 axb5 37. g6+ Kg8 38. gxh7+ Kxh7
39. a5 b4 40. f5 Rxa5 41. Rxe4 Re5 42. Rxe5 dxe5 43. Kd1 Bxh5+ 44. Kc2 Bg4 45.
Bd2 Bxf5+ $11 *

Hello,
I do not find an equaising way after Greets 211...Ld7 in his Maroczybook for black. 1.e4 c5 2.Sf3 g6 3.d4 cd: 4.Sd4: Sc6 5.c4 Sf6 6.Sc3 Lg7 7.Le2 Sd4: 8.Dd4: d6 9.Le3 0-0 10.Dd2 Le6 11.Tc1 Da5 12.f3 Tfc8 13.b3 a6 14.Sa4 Dd2:+ 15.Kd2: Sfd7 16.g4 f5 17.ef5: gf5: 18.h3 Tf8 19.f4 Tad8 20.g5 Sc5 21.Sc3 Ld7 This was by Tsesarsky and Greet. It looks logical to develop this peace now to c6 but 22.Lf3 Lc6 23.Sd5  Td7 24.Lc5:! dc5: 25.The1 Te8 26.Te6 an white has a pull.
I have some analyses in cbh-form. How can I post it?
pgn I donz know how to produce it.
Please only suggestions after 21...Ld7

Thanks for help