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Normal Topic Bxb5 in the Svechnikov... (Read 3024 times)
pierre
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Re: Bxb5 in the Svechnikov...
Reply #5 - 01/10/08 at 10:39:49
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Thanks a lot, I think I've understood now Smiley
And nice diagram Matemax !

Pierre
  
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Matemax
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Re: Bxb5 in the Svechnikov...
Reply #4 - 01/09/08 at 15:56:03
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I think the most dangerous version of a sac on b5 is the "Pliester-line" (knight sac):

1. e4 c5 2. Nf3 Nc6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bf6 gf6 10. Nd5 f5 11. c3 Bg7 12. Bd3 Be6 13. Nb5

where Black has already commited his bishop to the c8-h3 diagonal and therefore cant place it on b7

There was a very nice article in Yearbook 76 and Tony analysed the game Almasi-Sutovsky (1-0) in the "Open Sicilian" section June 05

You people from planet sveshnikov - beware! Grin
  
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Willempie
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Re: Bxb5 in the Svechnikov...
Reply #3 - 01/09/08 at 12:13:49
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Nice Smiley

It is very useful to look at that Bxb5 sacrifice in different variations anyway if you play the Svesh. I think it is the most common try "at refutation" you can face as black. I think I have won 3 games with that sac as white as black players often screw up their move-orders. It can make a world of difference in these lines where white has put his pawns and certainly a move like c3 should set of the warning signals for black as it gives white additional options and indeed blocks a move like Nd4, which can refute the sacrifice directly.
  

If nothing else works, a total pig-headed unwillingness to look facts in the face will see us through.
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Matemax
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Re: Bxb5 in the Svechnikov...
Reply #2 - 01/08/08 at 16:25:26
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Quote:
Also there is 12..Qa5+ which isnt good in that similar line as well.

Willempie is certainly right, tat 12...Ra7 does the job for black. Having a closer look at 12...Qa5 - comparing it to the variation without the g3-move 11...Qa5 shows that g3 simply weakens the f3-square and loses an important tempo.

Variation 1
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5 11.Bxb5!? (or is it ?!) axb5 12.Nxb5 Qa5+? (Ra4 or Ra7) 13.c3 Kd8 14.a4 fxe4 15.b4  white is better!

Variation 2
1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5 11.g3 fxe4 12.Bxb5? axb5 13.Nxb5 Qa5+! 14.c3 Kd8 15.a4 Nd4! (threat Nf3 - which is not possible in variation 1) 16.b4 white is lost!

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Black to play and win!

PS: I love the new "fen"-function
Smiley
  
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Willempie
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Re: Bxb5 in the Svechnikov...
Reply #1 - 01/08/08 at 10:56:22
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pierre wrote on 01/07/08 at 23:10:59:
Hello everybody !

I'm currently reading the book written by Rogozenko about the Svechnikov sicilian, and I would have a question for you about a specific line : in the line :
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Ndb5 d6 6. Bg5 a6 7. Na3 b5 8. Bxf6 gxf6 9. Nd5 f5 10. g3, he advises the move fxe4. What happens if white tries 11. Bxb5 axb5 12. Nxb5 now, after fxe4 which weakens the c8-h3 diagonal and creates the Qg4 mate threat after Nbc7 + Kd7 ?
The Ra4 move, which is the normal answer to the Bxb5 sac is not available now, and I can't see any way for black to answer the sac in a satisfactory way...

As I don't find games in my database with 10.g3 fxe4 11. Bxb5 , I assume I miss something evident in my analysis, but I don't find anything... Please help me  Wink

Pierre

I think that you have the move 12..Ra7, which isnt good in the similar line with 10.c3 (where 10..fxe4 is losing basically). Also there is 12..Qa5+ which isnt good in that similar line as well.
The 10.c3 line allows for both Qa4+ by white and doesnt allow black Qa5 with check, while both these options are on the table after 10.g3. Though you have to be able to play with a weird material balance 2B vs R after 12..Ra7, though imo black should be winning.
  

If nothing else works, a total pig-headed unwillingness to look facts in the face will see us through.
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pierre
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Bxb5 in the Svechnikov...
01/07/08 at 23:10:59
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Hello everybody !

I'm currently reading the book written by Rogozenko about the Svechnikov sicilian, and I would have a question for you about a specific line : in the line :
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Ndb5 d6 6. Bg5 a6 7. Na3 b5 8. Bxf6 gxf6 9. Nd5 f5 10. g3, he advises the move fxe4. What happens if white tries 11. Bxb5 axb5 12. Nxb5 now, after fxe4 which weakens the c8-h3 diagonal and creates the Qg4 mate threat after Nbc7 + Kd7 ?
The Ra4 move, which is the normal answer to the Bxb5 sac is not available now, and I can't see any way for black to answer the sac in a satisfactory way...

As I don't find games in my database with 10.g3 fxe4 11. Bxb5 , I assume I miss something evident in my analysis, but I don't find anything... Please help me  Wink

Pierre
  
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