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Hot Topic (More than 10 Replies) B72-B75: Exploiting 8.a4 (Read 12558 times)
MNb
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Re: Exploiting 8.a4
Reply #12 - 09/21/11 at 15:34:08
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bragesjo wrote on 09/21/11 at 14:29:22:
Also, if you want to post a game, use the new pgn function and enter the game data there

Thanks for doing my job.  Smiley You are right.
  

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bragesjo
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Re: Exploiting 8.a4
Reply #11 - 09/21/11 at 14:29:22
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There are many lines in Dragadorf (and also in some other sicilian variations) where a to early played b5 can be meet by a4 with an advantage. This thread was about a line where black had not played b5. While a4 temporary rules out the move b5, black will simply castle and bring out the pieces. White will probably castle short since in a long castling line black can sacrifice a pawn with b5 will open many lines vs whites king.

Also, if you want to post a game, use the new pgn function and enter the game data there
  
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vallescure
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Re: Exploiting 8.a4
Reply #10 - 09/21/11 at 13:00:39
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a4 is a "preventive attack" , as did Israeli aircrafts at the beginning of the Six days war : b5 is not yet defended by pieces , so it can't yet attack
My opponent is a SIM , better rated than I , so I suppose he had foreseen this possibility
I am not the first to use this strategy ( I have one game in my DB with the same outcome )
  
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fling
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Re: Exploiting 8.a4
Reply #9 - 09/21/11 at 10:39:51
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vallescure wrote on 09/21/11 at 10:06:43:
If it can help you :
[Event "Mare Nostrum IV "]
[Site "ICCF"]
[Date "2010.10.15"]
[Round "?"]
[White "Le Page, Claude"]
[Black "Satici, Aydin"]
[Result "1-0"]
[WhiteElo "2361"]
[BlackElo "2411"]
[PlyCount "67"]
[EventDate "2010.??.??"]
[WhiteTeam "FRANCE"]
[BlackTeam "TURKEY"]
[WhiteTeamCountry "FRA"]
[BlackTeamCountry "TUR"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 a6 7. f3 b5 8. Qd2
Bb7 9. a4 e5 10. Nb3 b4 11. Nd5 Nxd5 12. exd5 Nd7 13. O-O-O a5 14. f4 Bg7 15.
fxe5 Bxe5 16. Bh6 f6 17. Bb5 Qc7 18. Nd4 Kf7 19. Ne6 Qc8 20. Kb1 Ba6 21. Bf4
Bxb5 22. Bxe5 dxe5 23. Qh6 Ke7 24. axb5 Kd6 25. Qh4 Rb8 26. Rhf1 g5 27. Qh6 Qg8
28. Nd4 Qf7 29. Nf5+ Kc7 30. d6+ Kd8 31. h4 g4 32. Ne7 Rxb5 33. Qe3 Qe8 34. Qa7
1-0

Smiley


but this is different, with a4 after ...b5. I agree with Mnb, play for ...Nb4 and/or ...d5 and let White show why he thought a4 was good. I don't think White may be worse yet, there are still more positional plans like a5 e.g., but Black is doing well anyhow.
  
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vallescure
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Re: Exploiting 8.a4
Reply #8 - 09/21/11 at 10:06:43
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If it can help you :
[Event "Mare Nostrum IV "]
[Site "ICCF"]
[Date "2010.10.15"]
[Round "?"]
[White "Le Page, Claude"]
[Black "Satici, Aydin"]
[Result "1-0"]
[WhiteElo "2361"]
[BlackElo "2411"]
[PlyCount "67"]
[EventDate "2010.??.??"]
[WhiteTeam "FRANCE"]
[BlackTeam "TURKEY"]
[WhiteTeamCountry "FRA"]
[BlackTeamCountry "TUR"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 a6 7. f3 b5 8. Qd2
Bb7 9. a4 e5 10. Nb3 b4 11. Nd5 Nxd5 12. exd5 Nd7 13. O-O-O a5 14. f4 Bg7 15.
fxe5 Bxe5 16. Bh6 f6 17. Bb5 Qc7 18. Nd4 Kf7 19. Ne6 Qc8 20. Kb1 Ba6 21. Bf4
Bxb5 22. Bxe5 dxe5 23. Qh6 Ke7 24. axb5 Kd6 25. Qh4 Rb8 26. Rhf1 g5 27. Qh6 Qg8
28. Nd4 Qf7 29. Nf5+ Kc7 30. d6+ Kd8 31. h4 g4 32. Ne7 Rxb5 33. Qe3 Qe8 34. Qa7
1-0

Smiley
  
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MNb
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Re: Exploiting 8.a4
Reply #7 - 02/22/10 at 12:46:02
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I would just have played 8...0-0 and 9...Nc6; let White prove that 8.a4 is useful. Next goal is the thematic ...d5. It is nice that Black can play a knight to b4, while White does not have square b5 available.
  

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MartinC
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Re: Exploiting 8.a4
Reply #6 - 02/22/10 at 11:17:04
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Well the thing I really didn't understand was why white - after going a4! - suddenly decided to try and mate you on the kingside. 

9.. h6 does feel rather premature  - it makes it somewhat hard for you to castle. Given that, at that stage, white was still likely to castle kingside and play in the centre/queenside (and keep his e3 bishop to aim at b6) I'd have thought that a valuable option to retain. I think you may have struggled slightly to develop sensibly if white hadn't gone g4,g5 Smiley
(After which h6 made a lot of sense!)
  
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bragesjo
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Re: Exploiting 8.a4
Reply #5 - 02/22/10 at 08:22:05
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Well, I would have prefered to transpose to regular Dragon where the inclusions of the moves a6 and a4 makes yugoslav attacks less powerfull since whites king may come under heavy fire after any b5 pawn sacs (if prepared).
  
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Peter Rhodes
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Re: Exploiting 8.a4
Reply #4 - 02/22/10 at 06:46:33
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bragesjo wrote on 02/21/10 at 21:03:15:
But about Dragadorf I dont play this line myself so I dont know.


It relies on an early ...b5 so that the bishop can move to b7, so an early a4 pretty much rules out that Dragondorf stuff.

  
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bragesjo
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Re: Exploiting 8.a4
Reply #3 - 02/21/10 at 21:03:15
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if white plays an early a4 before blacks has played b5 white is going to castle short since black can open up many lines after any by b5 (even as a pawn sac). Generally speaking in the Dragon, a white pawn to a4 should only be played if black has place the a pawn to a5 or in some lines where white castles short to stop b5.

But about Dragadorf I dont play this line myself so I dont know.
  
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Peter Rhodes
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Re: Exploiting 8.a4
Reply #2 - 02/21/10 at 18:33:34
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Hi Martin,

thanks for your reply. I had meant to post sooner but have been tied up.

I've been studying Simon Williams dragon setup, and in all the literature, an early a4 is not mentioned, so I figured (perhaps incorrectly) that its not one of Whites best lines.

The problem I have is that it really imedes ..b5 and forces me to go for a normal dragon setup and makes the placement of the white squared bishop a problem - where do I develop it to ? e6 ? In this game thats what I eventually did.

You say you did not understand the rest of the game - I was a little dissapointed although I am not particularly high standard - around 135BCF (1750ish fide).

I met whites standard g4 with the usual ideas set out by Williams and played by Ward in his really instructive game in the London League (2005 I think). I'll link it if you're unfamiliar with this.

If you think I made any particularly bad mistakes in this game - I'd be happy to take instruction !!

thanks again,

Peter
  
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MartinC
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Re: Exploiting 8.a4
Reply #1 - 02/11/10 at 08:23:52
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If white plays sensibly - ie castling kingside and playing in the centre/queenside and not g4,g5! - after a4 then there won't be any exploiting it. Its the same set up that black uses in the reverse dragon when its very solid.

So its not critical or anything but whites hardly going to be worse Smiley (Unless black has some d5 break he may even be fractionally better.).

8.. Qc7 seems rational enough (although that bishop won't so much mind lurking on e2 for a bit.). 9 .. h6 however I really don't understand, or (somewhat) superfically much of the rest of the game Smiley
  
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Peter Rhodes
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B72-B75: Exploiting 8.a4
02/11/10 at 05:01:27
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In a recent game, 

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 a6

my opponent played 8.a4

I sunk into thought. White has played f2-f3 and a2-a4. Where will his king go ? I have not seen this recommended in any theory and spent quite some moments thinking of a fitting reply.

8...Qc7
seizing the c-file and hampering the natural development of the f1-bishop, and also waiting for white to commit further before deciding how to develop the queenside. But is the queen vulnerable here ?

The game continued
9. Qd2 h6 10. g4 Nc6 11. Rd1 Ne5 12. g5 hxg5 13. Bxg5 Qc5 14. Be2 Be6 15. Nxe6 fxe6 16. Qd4 Qxd4 17. Rxd4 Nh5 18. Rb4 Ng3 19. Rg1 Nxe2 20. Kxe2 Rxh2+ 21. Ke3 Nc6 22. Rc4 Rxc2 23. Rh1 Kf7 24. e5 Bxe5 25. Rh7+ Ke8 26. Rch4 Kd7 27. Ne4 Rxb2 28. Rf7 Rh8 29. Rg4 Rb3+ 30. Kd2 Rh2+ 31. Kc1 Ke8 32. Bxe7 Nxe7 0-1


Thoughts on 8.a4 and 8...Qc7 would be much appreciated.

Many thanks.

« Last Edit: 09/21/11 at 15:33:00 by MNb »  
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