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Normal Topic Gruenfeld exchange 7.Bc4 (Botvinnik variation) (Read 2937 times)
lnn2
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Re: Gruenfeld exchange 7.Bc4 (Botvinnik variation)
Reply #7 - 08/13/07 at 06:28:40
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recently at the Brit Championships there was Rowson the man himself... on the White side of this line!

[Event "British Championship"]
[Date "2007.07.30"]
[White "Jonathan Rowson"]
[Black "Simon J B Knott"]
[WhiteElo "2599"]
[BlackElo "2374"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3
Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 Qc7 11. Rc1 Rd8
12. Bf4 Qd7 13. dxc5 Qe8 14. Bd5 Bd7 15. Qd3 e6 16. Bb3 Na5
17. Bd6 b6 18. Qe3 Ba4 19. Bc7 Rdc8 20. cxb6 axb6 21. Bxb6
Nxb3 22. axb3 Bxb3 23. Nd4 Bc4 24. Rfd1 e5 25. Nf3 Bb3 26. Re1
Be6 27. Bc5 Qc6 28. Bb4 Qa6 29. h3 Qa7 30. Qxa7 Rxa7 31. Ra1
Rb7 32. Ra3 f6 33. Rd1 Kf7 34. Ne1 f5 35. Nf3 Bf6 36. Ra5 fxe4
37. Nxe5+ Bxe5 38. Rxe5 Bb3 39. Rd6 Re8 40. Rxe8 Kxe8 41. Bc5
Rc7 42. Bd4 Ke7 43. Rb6 Bc4 44. Kh2 Bf1 45. Kg3 Kd7 46. h4 Rc6
47. Rb7+ Rc7 48. Rb1 Bd3 49. Ra1 Rc6 50. Ra7+ Rc7 51. Ra5 Rc6
52. Kf4 Ra6 53. Rc5 h6 54. Bg7 Ra2 55. Kg3 h5 56. Bd4 Ra6
57. Kf4 Bf1 58. g3 Bd3 59. Kg5 Rc6 60. Ra5 Ra6 61. Rxa6 Bxa6
62. Kxg6 Be2 63. f4 exf3 64. Bf2 1-0

That's the second time this year Knott lost in this line (earlier loss to Pert, covered by Flear on chesspub).

any thoughts?
  
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micawber
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Re: Gruenfeld exchange 7.Bc4 (Botvinnik variation)
Reply #6 - 03/21/07 at 18:57:44
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On 12.Bf4,e5, 13.Bg5,Rd6 14.Bd5

14....Be6 15.dxc,Rd7 16.c4,Qa5 17.Qd2,Qxc5 and black regained his pawn in
Linauskas-Malinauskas, Vilnus 2000 (was this the line referred to in the earlier posts)

A similar idee was played much earlier:
14...cxd4 15.cxd4,Be6 16.dxe,Bxe5 = Peev-Kyril Georgiev, Plovdiv 1984

I must admit that I didnt realize that
12.Bf4,Qd7 13.dxc5,Ne5 was a mainline, though its probably ok for black
I thought the split in variations came one move later:
12.Bf4,Qd7 13.dxc,Qe8 14.Bd5 and now
either 14.....Bd7 as played for instance by Knott twice last year
or      14.....Ne5 as in Knaak-Ribli, Amsterdam, 1974


  
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MNb
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Re: Gruenfeld exchange 7.Bc4 (Botvinnik variation)
Reply #5 - 03/20/07 at 20:46:26
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Exactly. And Black did not really sac that c-pawn - he got it back with a couple of moves. Does this mean, that 12...e5 is a straightforward equalizer?
  

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ygramul
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Re: Gruenfeld exchange 7.Bc4 (Botvinnik variation)
Reply #4 - 03/20/07 at 08:23:22
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12.Qe1 was played by Spassky against Fischer in the sixties.  Fischer replied with 12...e6 and Spassky played in the way MNb has just suggested: 13.f4.  He won the game.  However Spassky himself suggested the correct answer 12...Qa5! forcing advantageous exchanges.

As far as I know the most dangerous moves in the position are 12.Qd2 (aiming to change the dark bishops via Bh6) and 12.Bf4, whose main plus is to limit Black usual counterattack.  Finally 12..e5 has been considered a mistake due to  13.Bg5 and now White should have an edge after both 13...Re8 14.d5 or 13...Rd6 14.Bd5.  Recently however in the latter line the interesting 14...Be6 was tried with the idea of sacrificing the c pawn.
  
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MNb
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Re: Gruenfeld exchange 7.Bc4 (Botvinnik variation)
Reply #3 - 03/19/07 at 20:54:52
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Alesab wrote on 03/19/07 at 12:55:42:
I'm not sure that Bf4 is the most dangerous for white.


Neither am I and neither am I skilled. Any thoughts about 12.Bf4 e5 ?
My instinctive reaction would be to play in GPA style with f2-f4-f5 (iso of Bf4). But it looks like there is no way to avoid the blockading ...f5, after which White can forget all attacking ideas and will have to worry about his centre and passive bishops.
So I wondered if 12.Qe1 is an idea, only playing 13.f4 when it suits?
  

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ygramul
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Re: Gruenfeld exchange 7.Bc4 (Botvinnik variation)
Reply #2 - 03/19/07 at 14:21:43
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I think the matter of the main line after Bf4 is open:  G. Flear in Chesspublishing gives a) a3) and b) while doesn't even mention b1.
  
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Alesab
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Re: Gruenfeld exchange 7.Bc4 (Botvinnik variation)
Reply #1 - 03/19/07 at 12:55:42
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I'm not sure that Bf4 is the most dangerous for white.
I'm not skilled in this variaton but i think that principal lines after Bf4 are a2 and b1.
Do you have any important example?
  
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ygramul
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Gruenfeld exchange 7.Bc4 (Botvinnik variation)
03/15/07 at 08:17:07
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After a long period in which 7.Nf3 and then Rb1 was in fashion, now White players seem to prefer 7.Bc4 in the Gruenfeld exchange.   

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4

As a matter of fact the most recent book dedicated to the Grunfeld is that of Sakaev " An experts guide tothe 7.Bc4 Grunfeld" which against the Botvinnik variation suggests 12.Bf4 (while G. Flear in Chesspublishing seems to prefer 12.Qd2.  Now I would invite whoever plays this variation with White or Black to jointly discuss the position after

7... c5 8.Ne2 0-0 9.0-0 Nc6 10.Be3 Qc7 11.Rc1 Rd8 12.Bf4 Qd7

and try to assess the main options of Black:

a) 13.d5 Na5 14.Bd3 b5!?
a2) 13.d5 Na5 14.Bd3 b6!?
a3) 13.d5 Na5 14.Bd3 e5
a4) 13.d5 Ne5 14.Bxe5 Bxe5 15.f4 Bg7

b) 13.dxc5 Qe8 14.Bd5
b1) 13.dxc5 Ne5 14.Bxe5 Bxe5
  
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