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Very Hot Topic (More than 25 Replies) Another nail in the coffin for 9 0-0-0 Nxd4 ? (Read 18709 times)
parisestmagique
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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #25 - 10/11/06 at 15:46:25
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At least we found an improvement over Dearing analyses but a improvement for white ! 18.Qc1 !! and 19.Na2 ! are incredible moves but almost killing 9... Nxd4 ?!
  
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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #24 - 10/11/06 at 14:57:25
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Scholar wrote on 10/10/06 at 21:17:12:
bundesligaspieler wrote on 10/10/06 at 16:58:24:
Hello all,
Scholar proceeds by stating that Black is lost after 14.hxg6 hxg6, which is a fairy tale and I have seen no evidence for that in this forum yet.
Please give the main line if you make such brutal assertions. On the other hand, 14...fxg6 is
considered bad in theory.


May I suggest http://www.chesspub.com/cgi-bin/yabb2/YaBB.pl?num=1138304930. ; There are probably other threads; I believe that this has, in fact, been extensively discussed here.  I haven't seen anything recently to suggest that the assessment of Black's chances in this line should change.

Welcome to the forum -- there is a lot of older material here, and there is handy search function which may help you to unearth the analysis posted here by others.


parisestmagique wrote on 10/11/06 at 09:16:44:
Maybe we are a little negative about this line. What do you think of these moves ? is there any improvement for one side ? How to judge the final position ? is it clearly better for white or Black has chances in this ending ? 9 000 Nxd4 10.Bxd4 Be6 11.Kb1 Qc7 12.h4 Rfc8 13.h5 Qa5 14.hxg hxg 15.a3 Rab8 16.Bd3 Bc4 17.BxB RxB 18.Qc1 e6 19.g4 Rbc8 20.g5 Nh5 21.BxB KxB 22.Rxd6 Rxc3 23.bxR Ng3 24.Re1 Ne2 25.Qb2 Nxc3+ 26.Ka1 Qxg5 27.Rd3 Qf6 28.R1e3 Na4


See the above link (and several other old threads, some linked from there); this has all been covered before.  White has better than that endgame.

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2
O-O 9. O-O-O Nxd4 10. Bxd4 Be6 11. Kb1 Qc7 12. h4 Rfc8 13. h5 Qa5 14. hxg6 hxg6
15. a3 Rab8 16. Bd3 Bc4 17. Bxc4 Rxc4 18. Qc1 e6 19. Na2 and Black is running out of tricks.

There is a reason why there is a consensus here that this line is not playable.  At any rate, there is little point in discussing this further unless new analysis is provided.
  
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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #23 - 10/11/06 at 09:26:46
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PGN with my analysis of 16.h6 b4 17.Nd5:

[Event "ChessPublishing.com analysis"]
[Site "ChessPublishing.com"]
[Date "2006.10.11"]
[Round "1"]
[White "bundesligaspieler"]
[Black "Alkelele"]
[Result "1/2-1/2"]
[ECO "B76"]
[Annotator "Klump,Rasmus"]
[PlyCount "44"]
[EventDate "2006.10.11"]
[EventType "swiss (rapid)"]

1. Nc3 c5 2. e4 d6 3. Nf3 Nf6 4. d4 cxd4 5. Nxd4 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2
Nc6 9. O-O-O Nxd4 10. Bxd4 Be6 11. Kb1 Qc7 12. g4 Rfc8 13. h4 Qa5 14. a3 Rab8
15. h5 b5 16. h6 b4 17. Nd5 {Apparently this is recommended in some old
sources, and Ward also recommends it in WWTSD II. I can see no advantage for
White though. Firstly, 17...Bxd5 seems to pretty much force a draw by
repetition, and it is Black who can look for more. Secondly, 17...Nxd5
(unclear, Golubev) also gives Black an equal game. All according to the
following analysis, which may be flawed of course.} (17. Nb5 Rxb5 18. Bxb5 Qxb5
19. hxg7 bxa3 20. Qd3 Qxd3 {
and White has a substantial edge after both 21.Rxd3 and 21.cxd3.}) 17... Bxd5 (
17... Nxd5 18. hxg7 Nc3+ 19. Ka1 f6 {
Now white has 4 tries, Qh6, Qh2, Re1, and Rc1.} 20. Qh6 (20. Re1 Nb5 21. Bxb5 (
21. Qh6 Kf7 {transposes.}) 21... Rxb5 22. Qh6 Kf7 23. g8=Q+ (23. Qxh7 Rg8 24.
Re3 (24. Rd1 bxa3 25. b3 Qc7 26. Qh2 a5 $17) (24. Qh2 Bc4 $17) (24. Qh6 Bc4 $17
) (24. Rc1 bxa3 25. b3 Bd7 $17 (25... Qb4 $5)) 24... Qc7 (24... bxa3 $5 25.
Rxa3 Qd2 26. Bc3 Qxc2) 25. Kb1 Qc4 (25... Rxg7 $5) 26. Rd1 Qa2+ 27. Kc1 b3 28.
c4 (28. Rde1 bxc2 $19) (28. cxb3 Bxb3 $19) 28... Bxc4 (28... Ra5 $5) 29. Ree1
e5 30. Bc3 d5 31. Kd2 d4 32. Ra1 dxc3+ 33. Kxc3 Rc5 34. Rxa2 Be2+ 35. Kb4 Rc4+
$11) 23... Rxg8 24. Qxh7+ Rg7 (24... Ke8 $5) 25. Qh2 Bc4 (25... bxa3 $5 26. b3
Bd7 (26... Bxb3) (26... Qb4)) 26. Bxf6 (26. b3 Qxa3+ 27. Kb1 Bxb3 28. cxb3
Qxb3+ $19) 26... exf6 27. Qxd6 bxa3 28. b4 Qxb4 $11) (20. Qh2 h5 21. gxh5 Kxg7
22. Re1 (22. Bh3 b3 23. cxb3 Bxh3 24. Rc1 Rxb3 25. Bxc3 Rxa3+ 26. bxa3 Rxc3 27.
Rxc3 Qxc3+ $11) (22. Rc1 bxa3 (22... Na2 23. Bh3 Bxh3 24. Qxh3 bxa3 25. b3 Nxc1
26. Qe6 Qd2 27. Qxe7+ Kg8 28. Qe6+ Kf8 29. Qxd6+ Ke8 30. Qe6+ Kd8) 23. b3 (23.
bxc3 a2 24. hxg6 Rh8 $17) 23... Qb4 (23... Na4 $5) 24. Qg1 (24. hxg6 Rh8 25.
Qg1 Ne2 26. Bxe2 Rxh1 27. Qxh1 Qxd4+ 28. c3 Qd2 29. Qh7+ Kf8 30. Qh8+ Bg8 31.
g7+ Kf7 $19) 24... Bxb3 $11) 22... g5 23. Qd2 (23. h6+ Kh8 24. Qd2 (24. h7 Na2
25. Re3 (25. Qd2 Rxc2 $19) 25... bxa3 26. b3 Nb4 27. c4 $17) (24. Qf2 bxa3 25.
b3 Bxb3 $19) (24. f4 bxa3 25. b3 Qb4 26. Qd2 Nd5 27. Rd1 Nxf4 $17) 24... bxa3
25. b3 Bxb3 26. Rb1 (26. e5 dxe5 27. Bxe5 fxe5 28. cxb3 Qb6 29. Qxg5 Qf6 30.
Qg7+ Qxg7 31. hxg7+ Kxg7 $17) 26... Bxc2 27. Rxb8 Rxb8 28. Qxc3 Qxc3+ 29. Bxc3
Rb1+ 30. Ka2 Rb3 31. Bd4 Rxf3 {and white is fighting for the draw.}) (23. f4
bxa3 24. b3 (24. bxc3 Rxc3 $19) 24... Qb4 25. Qg1 Kf8 $19) 23... Kg8 (23... Kf7
$5) 24. Rg1 (24. h6 Nb5 25. h7+ (25. Bxb5 Rxb5 26. Qd3 (26. h7+ Kh8 {
transposes to 25.h7+}) 26... Bc4 $15) 25... Kh8 26. Bxb5 Rxb5 27. Qh2 (27. Qf2
bxa3 (27... Qa4 $11) 28. b3 Qb4 29. Rc1 (29. Rd1 Rbc5 30. Rd2 Rc3 $17) (29. Rb1
Rxc2 (29... d5 $5) 30. Bxf6+ exf6 31. Qxc2 Qd4+ 32. Ka2 Rc5 33. Qe2 Qb4 (33...
a5 $5 34. Rhd1 Qe5) 34. Rh6 (34. e5 dxe5 $17) (34. Rhd1 Rc3 $17) (34. Ka1 Qc3+
35. Ka2 a5 36. Rhc1 Bxb3+ 37. Rxb3 Qxc1 38. Rb8+ Rc8 39. Rxc8+ Qxc8 $19) 34...
Rc3 35. Qd1 Qc5 36. Rh2 a5 37. Qg1 Qb4 38. Qa7 Bxb3+ 39. Ka1 Rc8 40. Qe3 a4 $17
) 29... Rbc5 30. f4 g4 31. c4 (31. e5 dxe5 32. fxe5 Rxc2 (32... f5 $5) 33. Rxc2
Rxc2 34. Qxc2 Qxd4+ 35. Ka2 $17) (31. f5 Bxb3 32. c3 Rxc3 33. Bxc3 Rxc3 34.
Qxa7 Bd5 35. Rb1 Rb3 36. Qe3 Qxe4 $19) 31... Qxb3 32. Bxc5 Rxc5 33. Qd2 Qb7 $17
) (27. Kb1 Ba2+ 28. Ka1 Bf7 $17) 27... Rc3 {and Black has at least a draw.}) (
24. f4 Nb5 25. Bxb5 Rxb5 26. fxg5 (26. f5 Bf7 27. h6 Kh7 28. Qd3 bxa3 29. b3
Qb4 $17) (26. Qd3 bxa3 27. b3 gxf4 (27... Qb4 $5) 28. Reg1+ Kf7 29. h6 Rg5 $15)
26... bxa3 27. Qxa5 axb2+ 28. Kb1 Rxa5 29. gxf6 Rb8 $15) 24... bxa3 (24... Nb5
$5 25. Rxg5+ fxg5 26. Qxg5+ Kf8) (24... Kf7 $5) 25. b3 Qb4 26. Rg2 (26. f4 Nd5
$17) 26... a5 27. e5 (27. Ba6 Rc6 28. f4 Nb5 29. Bxb5 Qxd2 30. Rxd2 Rxb5 $15)
27... dxe5 28. Bxe5 a4 29. Rxg5+ (29. Bxb8 Rxb8 30. Rxg5+ Kf7 31. Rxe6 axb3 $11
) 29... Kf7 30. Bh3 Ne4 31. Bxe6+ Kxe6 32. Qxb4 (32. Qe3 $11) 32... Rxb4 33.
Bxf6 Rxc2 34. Bxe7 Kxe7 35. Ra5 axb3 36. Rxa3 b2+ 37. Kb1 Rc1+ 38. Rxc1 Nd2+
39. Kc2 bxc1=Q+ 40. Kxc1 $11) (20. Rc1 Nb5 21. Bxb5 Rxb5 22. Qh6 Kf7 23. Qe3 (
23. Qxh7 Rg8 {and Black is no worse.}) 23... h5 {and Black is no worse.}) 20...
Kf7 21. Rd2 (21. Re1 {transposes to 20.Re1.}) 21... bxa3 22. b3 Rc6 {I suggest 
22...Rc6 as the most clear cut way to achieve full equality here. The
alternatives are Nb5, Qb4, Rg8 and Rc7. I will not give more analysis of this
line, as it seems quite academic in light of 17...Bxd5.}) 18. hxg7 (18. exd5
Bh8 {and Black is somewhat or much better. One threat is Nxd5 Bxh8 Nc3+. For
example:} 19. Be2 $2 Nxd5 20. Bxh8 Nc3+ $19) 18... e5 {
Now, according to the analysis, 19.exd5 is pretty much forced.} 19. exd5 (19.
Be3 Qa4 (19... Bxe4 20. fxe4 Nxe4 21. Qh2 h5 $19) 20. exd5 (20. Bd3 bxa3 21. b3
Bxb3 $19) 20... bxa3 21. b3 Rxb3+ $19) (19. Bxe5 dxe5 20. exd5 Rc5 {
This gives Black a huge advantage.} (20... Rc3 {
White may have a chance to draw after this move.} 21. d6 (21. g5 Rxa3 {
This forces a draw right away.} (21... bxa3 {
may give Black hope for more than a draw.} 22. b3 Nh5 (22... Nxd5 23. Bc4 Ne3
24. Bxf7+ Kxg7 {and Black can not count on more than a draw.})) 22. bxa3 bxa3+
23. Ka1 Rb1+ 24. Rxb1 (24. Ka2 Rb2+ 25. Ka1 $11) 24... Qxd2 25. gxf6 Qc3+ 26.
Ka2 Qxc2+ 27. Ka1 $11) (21. a4 Qxa4 22. b3 (22. Bc4 Rxc4 23. b3 Qa3 24. bxc4 b3
25. c3 b2 26. Qe1 Nd7 $19) 22... Qa3 (22... Rxb3+ 23. cxb3 Qxb3+ 24. Ka1 $11)
23. d6 (23. g5 Rc5 24. Qh2 Ra5 25. Qxe5 Rc8 $17) 23... Rc5 24. Qc1 Qxc1+ 25.
Kxc1 Kxg7 $17) 21... bxa3 $5 (21... Rxa3 22. bxa3 bxa3+ 23. Ka1 Rb1+ 24. Ka2
$11) 22. b3 Qc5) 21. d6 (21. axb4 Rxb4 22. c4 Qa3 23. Rc1 (23. Qh2 Ra5 24. Qxe5
Nd7 25. Qe8+ Kxg7 26. Rxh7+ Kxh7 27. Qxf7+ Kh6 28. g5+ Kxg5 29. Qe7+ Kh6 30.
Qh4+ Kg7 31. Qe7+ Kg8 32. Qe6+ Kf8 33. Qd6+ Ke8 $19) 23... Ra5 24. Qc3 Qa2+ 25.
Kc2 Raa4 26. Kd2 Rxb2+ 27. Rc2 Rxc2+ 28. Qxc2 Nxd5 $19) (21. g5 Nxd5 22. Qh2 h5
23. gxh6 Kh7 $17) 21... Rd5 22. Bd3 bxa3 23. Qxa5 (23. b3 Qc5 $17) 23... Rxb2+
24. Ka1 Rxa5 25. Be4 Nd7 $17) (19. Bf2 Qa4 20. exd5 bxa3 21. b3 Rxb3+ 22. Ka1
Rb2 $19) (19. Bg1 Qa4 20. exd5 bxa3 21. b3 Rxb3+ $19) (19. b3 Bxe4 20. fxe4
exd4 $17) 19... exd4 20. b3 (20. Bd3 {Only somewhat reasonable move I can find
that doesn't allow Black to force a draw on the spot.} Qb6 {Black looks better.
}) (20. a4 Nxd5 {Forces a draw at least.} (20... Qxd5 $5) 21. Qh6 (21. Bd3 Nc3+
22. Kc1 Na2+ $11) 21... Nc3+ 22. Kc1 (22. bxc3 bxc3+ 23. Kc1 Rb1+ $19) 22...
Na2+ $11) 20... Nxd5 {Forces a draw, and Black may have a better move.} 21. Qh6
Nc3+ 22. Kc1 Na2+ {with a draw.} 1/2-1/2
  
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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #22 - 10/11/06 at 09:26:05
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bundesligaspieler wrote on 10/10/06 at 16:58:24:
Hello all,

there are so many false assertions in this thread, that it's difficult to keep counting.


Thank you for your interest! And welcome to the forum! 

Quote:
The first error is the title, which seems to imply that 9...Nxd4 is dead.
 

When I wrote the title, I tried to take into account the perceived consensus in this forum. The consensus here seems to be that, well, if black is not dead after 9...Nxd4, he's breathing through a respirator. The working proposition of my post was that maybe white has an even more convincing way of dealing with 9...Nxd4 than what is generally considered most critical. It was intended as an open question, not a dirty implication!

Quote:
Are you just unable to chose a title which leaves room for discussion?
 

I had hoped that the question mark would leave enough room for discussion!

Quote:
The 2nd error is, that 16.h6 Bh8 17.g5?! (my interpunction) is new. It was analyzed 20 years 
ago by Keene and considered better for Black.


I in no place tried to give an impression that I knew all games and published analysis of these lines! What I meant was that 17.g5 was at least not recognised as giving black any serious problems (that is, it had rarely been seen), and that maybe I was in position to present some analysis to change the assessment of the move. After having written my last posts, I have dusted off Golubev's "(not so) easy guide to the dragon", and he indeed also mentions "17.g5? b4 18.Nb5 Qa4! 19.gxf6 bxa3 and Black has a clear advantage, Wiedenkeller-Pousette, Hallsberg 1980". The NEW move then, is 19.Rh2, that my opponent played, after which I believe black is practically lost. I posted a PGN with a good deal of analysis of this position.  

Quote:
Please inform yourselves in chess informant, I cannot quote all analysis here.


Maybe it would suffice to just point out the improvement for black after 19.Rh2, or earlier?

Quote:
Third, 16.h6 b4 was heavily analysed until it was found out, that after 17.Nd5 White is better.
In this thread was given: "17...Nxd5 18. hxg7 Nc3+ $1 19. Ka1 f6 { 
Black is at least no worse}" . Again, I cannot agree. According to theory (Tiviakov, monography B76)
this is much better for White.
 

Below is attached PGN with my analysis of 17.Nd5. My conclusions are:

1) 17...Bxd5 practically forces a draw by repetition, with black having the option to try for more.

2) 17...Nxd5 is probably also fine for black.

Maybe you can find some flaws in the analysis, perhaps by consulting your sources also? I would only be thankful. I should probably note that Golubev gives 17...Nxd5 as unclear, and recommends 17.Nb5 instead of 17.Nd5. He includes Tiviakov's B75-76 in his bibliography, by the way. 

Quote:
Possibly 17.Nb5 is also good.


Yes, possibly. Maybe you have something insightful to add to the discussion of this line that has already taken place in this thread?

Quote:
About 16.h6 Bf8 I have not seen yet, neither analysed it, so no comment.

16.h6 Bh8 seems best for Black, with an equal game according to my material.


Chris Ward in WWTSD II also calls 16...Bh8 a "perfectly reasonable alternative". My analysis presented in this thread indicates otherwise, however. I would be quite interested in learning where black can improve.

Quote:
12.h4, as mentioned by Scholar, doesnt belong to the thread, but it is neither much better than 12.g4,
nor is it anywhere near winning for white. Scholar proceeds by stating that Black is lost
after 14.hxg6 hxg6, which is a fairy tale and I have seen no evidence for that in this forum yet.
Please give the main line if you make such brutal assertions.
 

Since I also made that assertion, please allow me to respond. I offer you a deal: If you find any essential flaws in my analysis presented in this thread, I will give you more flawed analysis demonstrating a near-winning advantage to white after 14...hxg6.

Quote:
On the other hand, 14...fxg6 is considered bad in theory.


OK.

Quote:
Suffice it to say that in my opinion 16.h6 is not the best try, maybe 16.Nd5 is another,
but Black still does not have problems in the material I collected and my analysis.


I value your opinion, since you are obviously a very knowledgeable person, but I would REALLY appreciate it if you could back up your opinion in concrete terms instead of just referring to some 20-year old Keene analysis Smiley That way me may also have a chance of making improved assessments.
 
Quote:
Generally there is no suffering for Black after 9.000 in my opinion and Black does not have to pray.


Certainly, black does not have to pray that much after 9.000, but if he continues 9...Nxd4, it just may pay off Wink

Quote:
There are these complete out-of-place posts crying for an accelerated dragon.


I think he was joking. Joking, not crying.

Quote:
Well that's it for now. With so many unfounded assertions, I see no reason to get mixed up in the
discussion, let apart reveal personal analysis in exchange for some whining.


Funny, that's just how I feel upon reading your post. I believe you can do better. And it would be much welcomed Smiley
« Last Edit: 10/11/06 at 16:36:48 by Alkelele »  
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parisestmagique
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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #21 - 10/11/06 at 09:16:44
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Maybe we are a little negative about this line. What do you think of these moves ? is there any improvement for one side ? How to judge the final position ? is it clearly better for white or Black has chances in this ending ? 9 000 Nxd4 10.Bxd4 Be6 11.Kb1 Qc7 12.h4 Rfc8 13.h5 Qa5 14.hxg hxg 15.a3 Rab8 16.Bd3 Bc4 17.BxB RxB 18.Qc1 e6 19.g4 Rbc8 20.g5 Nh5 21.BxB KxB 22.Rxd6 Rxc3 23.bxR Ng3 24.Re1 Ne2 25.Qb2 Nxc3+ 26.Ka1 Qxg5 27.Rd3 Qf6 28.R1e3 Na4
  
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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #20 - 10/10/06 at 21:17:12
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bundesligaspieler wrote on 10/10/06 at 16:58:24:
Hello all,
Scholar proceeds by stating that Black is lost after 14.hxg6 hxg6, which is a fairy tale and I have seen no evidence for that in this forum yet.
Please give the main line if you make such brutal assertions. On the other hand, 14...fxg6 is
considered bad in theory.


May I suggest http://www.chesspub.com/cgi-bin/yabb2/YaBB.pl?num=1138304930.  There are probably other threads; I believe that this has, in fact, been extensively discussed here.  I haven't seen anything recently to suggest that the assessment of Black's chances in this line should change.

Welcome to the forum -- there is a lot of older material here, and there is handy search function which may help you to unearth the analysis posted here by others.
  
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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #19 - 10/10/06 at 20:59:53
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Please don't troll (though the grammatical errors are a particularly nice touch for winding people up, well done). Posting to the effect of "This is a pointless thread" is in itself pointless - if you haven't got anything constructive to say then don't say it. 

As for the actual content, I'd be interested as to whether you could tell us why 14...hxg6 is OK for Black; I can't say I've seen much evidence of that, and while "Black is lost" is almost certainly too strong, he's definitely suffering according to published analysis.

Adam
  
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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #18 - 10/10/06 at 16:58:24
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Hello all,

there are so many false assertions in this thread, that it's difficult to keep counting.

The first error is the title, which seems to imply that 9...Nxd4 is dead. Are you just unable
to chose a title which leaves room for discussion?

The 2nd error is, that 16.h6 Bh8 17.g5?! (my interpunction) is new. It was analyzed 20 years 
ago by Keene and considered better for Black. Please inform yourselves in chess informant,
I cannot quote all analysis here.

Third, 16.h6 b4 was heavily analysed until it was found out, that after 17.Nd5 White is better.
In this thread was given: "17...Nxd5 18. hxg7 Nc3+ $1 19. Ka1 f6 { 
Black is at least no worse}" . Again, I cannot agree. According to theory (Tiviakov, monography B76)
this is much better for White. Possibly 17.Nb5 is also good.

About 16.h6 Bf8 I have not seen yet, neither analysed it, so no comment.

16.h6 Bh8 seems best for Black, with an equal game according to my material.

12.h4, as mentioned by Scholar, doesnt belong to the thread, but it is neither much better than 12.g4,
nor is it anywhere near winning for white. Scholar proceeds by stating that Black is lost
after 14.hxg6 hxg6, which is a fairy tale and I have seen no evidence for that in this forum yet.
Please give the main line if you make such brutal assertions. On the other hand, 14...fxg6 is
considered bad in theory.

Suffice it to say that in my opinion 16.h6 is not the best try, maybe 16.Nd5 is another,
but Black still does not have problems in the material I collected and my analysis.

Generally there is no suffering for Black after 9.000 in my opinion and Black does not have to pray.
There are these complete out-of-place posts crying for an accelerated dragon.

Well that's it for now. With so many unfounded assertions, I see no reason to get mixed up in the
discussion, let apart reveal personal analysis in exchange for some whining.




  
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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #17 - 09/17/06 at 09:33:37
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Quote:
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. O-O-O d5 10. exd5 Nxd5 11. Nxc6 bxc6 
 
12.Bd4 is the main line,.. but what happens in real play when the continuation is ... 
 
12. Nxd5 cxd5 13. Qxd5 Qc7 14. Qxa8 Bf5 15. Qxf8+ Kxf8 


What happens is that black usually wins Smiley

This line has been known to bee good for black since d5 was invented.
  
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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #16 - 09/17/06 at 02:26:13
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[quote author=Scholar link=1156845907/0#11 date=1157834667]Well, I have yet to be convinced that Black is suffering after 9.0-0-0 d5.  No one has provided any line to a White edge on the numerous 9.0-0-0 d5 threads, and yet, this myth seems to continue...still I feel like a broken record on this topic, and perhaps it is simply better for people to believe that 9.0-0-0 is winning.  (If I thought that I had better chances against the Maroczy Bind then I might be tempted to play the accelerated dragon -- I invite one and all to start a new thread or revisit one of the old ones to enlighten me.)]

Any comments on:

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. O-O-O d5 10. exd5 Nxd5 11. Nxc6 bxc6

12.Bd4 is the main line,.. but what happens in real play when the continuation is ...

12. Nxd5 cxd5 13. Qxd5 Qc7 14. Qxa8 Bf5 15. Qxf8+ Kxf8
  
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kylemeister
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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #15 - 09/15/06 at 03:17:54
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MNb wrote on 09/15/06 at 02:15:23:
I can give you a half answer: GM Tiviakov usually avoids 9.0-0-0 by playing 2...Nc6 3.d4 cxd4 4.Nxd4 g6. Maybe he agrees with Parismagique.  Wink


Indeed, I recall when Tiviakov started playing that way some years ago; he was quoted as saying something like, "Well, Black doesn't have any realistic winning chances against 9. 0-0-0, so why not play as solidly as possible from the beginning?".
  
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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #14 - 09/15/06 at 02:15:23
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I can give you a half answer: GM Tiviakov usually avoids 9.0-0-0 by playing 2...Nc6 3.d4 cxd4 4.Nxd4 g6. Maybe he agrees with Parismagique.  Wink
  

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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #13 - 09/14/06 at 15:10:12
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If black has no winning chances why does strong Grand Masters like Tiviakov and Golubev play the Dragon? And was former FIDE World Champion Khalifman bluffing when he was playing the Dragon last year? 

I play the Dragon to prove that nothing is impossible.

  
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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #12 - 09/12/06 at 07:53:56
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i dont pretend that 9.000 is winning but see "experts against the Sicilian". From Black side of the Dragon he is suffering to equalize in many lines with no winning chances. If you dont think so, it's the right place to discuss lines where Black has winning chances. Here we have many analysys after 9.000 d5 10.exd Nxd5 11.Nxc6 bxN 12.Bd4 BxB or 12.Bd4 Nxc3 or the principal line with 12.Bd4 e5. Black seems to hold but with very few chances to win.
  
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Re: Another nail in the coffin for 9 0-0-0 Nxd4 ?
Reply #11 - 09/09/06 at 20:44:27
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Well, I have yet to be convinced that Black is suffering after 9.0-0-0 d5.  No one has provided any line to a White edge on the numerous 9.0-0-0 d5 threads, and yet, this myth seems to continue...still I feel like a broken record on this topic, and perhaps it is simply better for people to believe that 9.0-0-0 is winning.  (If I thought that I had better chances against the Maroczy Bind then I might be tempted to play the accelerated dragon -- I invite one and all to start a new thread or revisit one of the old ones to enlighten me.)

9...Bd7 is maybe worth another look, although the experts here seem to doubt its soundness; 8...Bd7 is likely the correct refinement of that idea.  I don't know much about these lines, but they seems like a good place for exploration.

It would be nice to make 9.0-0-0 Nxd4 work, but there are too many holes these days to make the effort worthwhile -- Eric Moskow suggested some bizarre looking deviations on the 9.0-0-0 thread here http://www.chesspub.com/cgi-bin/yabb2/YaBB.pl?num=1146753899;start=all for example playing Nxd4 with an early a5.  I can't say that I've been tempted to play this way.

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Edit: I had originally remarked that White could "force a draw with ease" after 9.0-0-0 d5.  I do not know how, as a message prompted me to realize, and so I have removed that assertion.
« Last Edit: 09/10/06 at 06:31:10 by Scholar »  
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