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Up Topic Rybka Support & Discussion / Rybka Discussion / A good variation against the French 4.b4 gambit variation ?
- - By Bouddha (****) Date 2008-01-02 18:24
Hello all,

I think I need your help here.

I will soon play in a closed tournament and one of my openend plays the b4 gambit against the french.
I am currently searching a good variation against it but have found currently nothing.
After many games with different engines (Rybka;Zappa;DS11;etc) it seems that white have relatively good results.
Just one example of variation I was working on my Quad QX6700

[Event "Prep_lops_2"]
[Site "Privé"]
[Date "2008.01.02"]
[Round "1.2"]
[White "Deep Shredder 11 x64"]
[Black "Rybka 2.3.2a mp"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "3000"]
[BlackElo "3000"]
[Annotator "-0.06;-0.11"]
[PlyCount "49"]
[EventDate "2008.01.02"]
[EventType "tourn"]
[Source "Bigler"]
[TimeControl "1500"]

{Intel(R) Core(TM)2 Quad CPU           @ 2.66GHz 2667 MHz  W=16.6 ply; 3'095kN/
s; Prep_lops.ctg  B=16.7 ply; 491kN/s; Prep_lops.ctg} 1. e4 {B/0 0} e6 {B/0 0}
2. Nf3 {B/0 0} d5 {B/0 0} 3. e5 {B/0 0} c5 {B/0 0} 4. b4 {B/0 0} cxb4 {B/0 0}
5. d4 {B/0 0} Ne7 {B/0 0} 6. a3 {B/0 0} Nf5 {B/0 0} 7. axb4 {B/0 0} Bxb4+ {
B/0 0} 8. c3 {B/0 0} Be7 {B/0 0} 9. Bd3 {B/0 0} O-O {-0.11/18 54} 10. O-O {
-0.06/15 45} Nc6 {(f6) -0.11/18 76} 11. g4 {(Na3) -0.18/16 42} Nh4 {-0.21/16 14
} 12. Nxh4 {-0.17/16 32} Bxh4 {-0.19/14 0} 13. f4 {-0.17/17 56} Be7 {
-0.26/17 37} 14. Qe2 {(Na3) -0.06/16 57} Kh8 {(a5) -0.32/15 48} 15. Kh1 {
(Na3) 0.00/15 44} a6 {(g6) -0.35/15 36} 16. Ra2 {(Na3) -0.03/15 47} Qc7 {
(Qe8) -0.38/14 46} 17. f5 {(Nd2) 0.32/17 57} Qd8 {(f6) -0.13/16 60} 18. f6 {
(h4) 3.41/15 33} gxf6 {-0.20/14 0} 19. exf6 {(Bh6) 3.61/17 385} Bxf6 {
(Rg8) 1.41/19 31} 20. g5 {5.51/17 33} Bxg5 {(e5) 6.10/18 234} 21. Qh5 {
7.64/15 35} f5 {1.32/15 0} 22. Bxg5 {10.30/13 17} Ne7 {(Qxg5) 10.82/17 181} 23.
Rg2 {(Rg1) 15.27/15 387} Bd7 {11.02/14 40} 24. Rfg1 {15.40/16 10} Be8 {
11.39/15 16} 25. Qh4 {15.40/18 15} 1-0

So I need help to have a good variation that either gives black an edge or gives an "easy" game for black.

Thanks in advance for your help

Best regards
Parent - By Laszlo (***) Date 2008-01-02 19:12
Very interesting. I like it.
Parent - - By Laszlo (***) Date 2008-01-02 19:26
17. f5 {(Nd2) 0.32/17 57} Qd8?? {(f6!!) -0.13/16 60}

17...f6 is a must.
Parent - By Bouddha (****) Date 2008-01-02 19:37
certainly but the question here is how can black play against b4 variation.
Seems that white has very interesting possibilities. (unfortunatelly for me)
Parent - - By Kappatoo (*****) Date 2008-01-02 21:36
Hi! I used to play the following variation: 1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4 cxb4 5.a3 Nc6 6.axb4 Bxb4 7.c3 Be7 8.d4 f6 9.Bd3 fxe5 10.dxe5 (10.Nxe5 Nf6) Nh6 and then after Bh6 gh black plays Rf7, Bd7, Qf8, Qg7, Raf8 (if necessary Kh8) - in the appropriate order. This looked quite decent to me, but I don't know what the engines think about it. Also, I'm not completely sure if white playing 5.d4 makes a difference. My impression is that black can play the same stuff - Nc6, and after a3 answer f6, etc. (Black even has the additional option of playing Bg7 later here - if white postpones ab).
Parent - - By Bouddha (****) Date 2008-01-02 23:57
Hi Thanks for your input.

I will review your comments asap, I hope latest January 3rd and come back.

thanks & regards
Parent - - By Bouddha (****) Date 2008-01-03 00:09
after a quick review, I personnaly think that white has good compensation in this variation.
Please find a few moves :

4... cxb4 5. a3 Nc6
6. axb4 Bxb4 7. c3 Be7 8. d4 f6 9. Bd3 fxe5 10. dxe5 Nh6
11. Bxh6 gxh6 12. O-O O-O 13. Na3 Bd7 14. Nb5 Rf7 15. Qe2
Qf8 (15... Rg7 16. c4) 16. Nfd4

regards
Parent - By Kappatoo (*****) Date 2008-01-03 09:54
I don't like Rg7 in these positions, although I just realized that Rybka thinks differently ...
In your main variation, you probably intend to answer 16...a6 with 17.Nc7 with the trick of taking on d5?! I don't know if you're looking for a refutation of white's gambit, but at least the position after 17...Nd4 18.cd Rc8 19.Nd5 ed 20.e6 Be6 21.Qe6 Rd8 looks completely safe for black (to me...).
Regards
Up Topic Rybka Support & Discussion / Rybka Discussion / A good variation against the French 4.b4 gambit variation ?

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