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Hot Topic (More than 10 Replies) Najdorf 6. Nb3 and 6. a3 (Read 1204 times)
kylemeister
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Re: Najdorf 6. Nb3 and 6. a3
Reply #10 - 03/25/17 at 16:34:59
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RdC wrote on 03/25/17 at 12:36:41:
Fischer demonstrated that if White plays f5, the correct response is .. e5 notwithstanding the hole on d5. In a later game against Byrne, Fischer varied from the Robatsch game by not castling. In that game he was able to meet f5 with .. e5 and after Ng3, .. h5.

Engines suggest the more modest Qe2 instead of pushing forwards with f5.


Yes, but Byrne-Fischer was with Bc4-b3 (no a3).
In the a3 version, Golubev* in his Sozin book had that Qe2 instead of f5 as leading to a slight positional advantage for White, citing a game Kupreichik-Shipov.

*who by the way has a forthcoming book "Understanding the Sicilian"
  
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RdC
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Re: Najdorf 6. Nb3 and 6. a3
Reply #9 - 03/25/17 at 12:36:41
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kylemeister wrote on 03/24/17 at 15:54:04:
Reportedly after that game, Robatsch asked Fischer where he went wrong, and was told that the whole line is worthless ...


Fischer demonstrated that if White plays f5, the correct response is .. e5 notwithstanding the hole on d5. In a later game against Byrne, Fischer varied from the Robatsch game by not castling. In that game he was able to meet f5 with .. e5 and after Ng3, .. h5.

Engines suggest the more modest Qe2 instead of pushing forwards with f5.
  
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bragesjo
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Re: Najdorf 6. Nb3 and 6. a3
Reply #8 - 03/24/17 at 21:09:37
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About the usefulless in Dragon between h3 and a6 is in Dragon depends on whites setup.

In g3 system white often plays h3 at some point for profylactic reasons  before f4 or even Nd5 are played and there are many lines where black does not play a6 at all or plays a6 that early.

Three is also a  mainline in classical  Dragon where white plays  h3.
In that cases the clean eqalicer is a d5 break and  not a6 setups where white can maybee can gain from h3 by ruling out Ng4 ideas.

The book Modernized Open sicilian went for h3 vs Najdorf and unless I missrember against g6 the lines looked about eqal but with a sligth space advantage for white


  
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kylemeister
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Re: Najdorf 6. Nb3 and 6. a3
Reply #7 - 03/24/17 at 15:54:04
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Meeting the modern 6. h3 with 6...g6 -- the first thing I think of is Fischer-Reshevsky.
I noticed that GM Roiz doesn't like 6. a3 g6.

The idea of Bc4 and Ba2 after 6. a3 e6 takes me back to another Fischer game, vs. Robatsch.  Reportedly after that game, Robatsch asked Fischer where he went wrong, and was told that the whole line is worthless ...
  
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Re: Najdorf 6. Nb3 and 6. a3
Reply #6 - 03/24/17 at 14:37:01
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bragesjo wrote on 03/24/17 at 13:34:21:
What do you think of the modern 6 h3? I think that point of h3 is to save a tempo compared to g3 since h3-g4 is standard moves in g3 lines.


I think I would like to go 6. h3 g6 and try to prove my a6 is more useful that White's h3 in a Dragon, and also apply that principle to some other move 6 side lines, e.g. maybe 6. Nb3 and 6. a3 too
  

Those who want to go by my perverse footsteps play such pawn structure with fuzzy atypical still strategic orientations

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bragesjo
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Re: Najdorf 6. Nb3 and 6. a3
Reply #5 - 03/24/17 at 13:34:21
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RdC wrote on 03/24/17 at 09:40:47:
Another obscure weapon is to play 6. g3. This can lead to positions similar to the line where White plays Bf1-e2-f3-g2 after  g4 has been played. It appears to gain time, but in practice Black can get b6 and Bb7 played without having to go Bc8-d7-c8-b7 as in the 1980s Karpov-Kasparov matches.


I have some excperience with the white pieces in 6 g3 when I played like in the now old book "Taiming the Sicilian".
The move is actually not that silly at all, white can get attacking chanses there too.

What do you think of the modern 6 h3? I think that point of h3 is to save a tempo compared to g3 since h3-g4 is standard moves in g3 lines.



  
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RdC
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Re: Najdorf 6. Nb3 and 6. a3
Reply #4 - 03/24/17 at 09:40:47
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Stigma wrote on 03/24/17 at 01:51:47:
Probably just shows my ignorance of modern chess, but I don't get these moves.

Why can't Black just switch to a Scheveningen where White has committed to something suboptimal? I mean, the Scheveningen is a respectable line even in more critical circumstances.



In the a3 version, it's possible for White to play Bc4 and drop back to a2. In the Nb3 version perhaps you are just forcing Black into a line he doesn't normally play. You do have the possibility of playing the Bishop directly to d3 without being bothered by .. Qb6 tactics.

Another obscure weapon is to play 6. g3. This can lead to positions similar to the line where White plays Bf1-e2-f3-g2 after  g4 has been played. It appears to gain time, but in practice Black can get b6 and Bb7 played without having to go Bc8-d7-c8-b7 as in the 1980s Karpov-Kasparov matches.
  
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Stigma
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Re: Najdorf 6. Nb3 and 6. a3
Reply #3 - 03/24/17 at 01:51:47
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Probably just shows my ignorance of modern chess, but I don't get these moves.

Why can't Black just switch to a Scheveningen where White has committed to something suboptimal? I mean, the Scheveningen is a respectable line even in more critical circumstances.
  

Improvement begins at the edge of your comfort zone. -Jonathan Rowson
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Re: Najdorf 6. Nb3 and 6. a3
Reply #2 - 03/24/17 at 00:58:41
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6 Nb3 is such a sad move.
  
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kylemeister
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Re: Najdorf 6. Nb3 and 6. a3
Reply #1 - 03/23/17 at 21:00:45
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Reminds me of 6. a4, a move associated with Beliavsky and advocated by Nunn in "Beating the Sicilian" circa 1984. 

6. a3 and 6. Nb3 also make an appearance in the latest Open Sicilians update.
  
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RdC
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Najdorf 6. Nb3 and 6. a3
03/23/17 at 19:17:11
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The latest New in Chess Year Book contains some material about the latest two attempts against the Najdorf, namely 6. a3 and 6. Nb3. A point seems to be that against the natural response of 6. .. e5, you have options to play Bc4 or Bg5 without loss of time.

So after 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. a3 e5, you can play 7. Nf3 and then Bc4.

In 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Nb3 e5 you can try 7. Bg5
  
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