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Hot Topic (More than 10 Replies) Avrukh GM2a (Read 3187 times)
Straggler
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Re: Avrukh GM2a
Reply #14 - 11/03/19 at 21:06:15
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kylemeister wrote on 11/03/19 at 16:35:47:
Straggler wrote on 11/03/19 at 08:17:16:
Maybe White has a semi-waiting move that doesn't allow 6...d5, such as 6.h3?

That reminds me of Benko-Fischer, to which it could transpose.  (Benko won, but his h3 isn't considered a try for theoretical advantage as far as I know.)

After 5.Nc3 Nc6 6.h3 d6 7.Nf3, instead of Fischer's 7...e5 Stockfish likes 7...d5!? Then 8.cxd5 Nxd5 9.0-0 e5 is Avrukh's must-avoid line, except that White has played the not-obviously-useful h3.
  
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Re: Avrukh GM2a
Reply #13 - 11/03/19 at 17:11:06
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TD wrote on 11/03/19 at 12:33:13:
This move order bypasses Lemos' Grunfeld repertoire for White in The Fianchetto System!

I believe Lemos recommends Nf3 before Nc3. This does seem to avoid the position which Avrukh wants to avoid, because after 5...d5 6.cxd5 Nxd5 White can play 7.0-0 instead of 7.Nc3; but 5...c6 leads to non-Avrukh lines.

I'd really like to know whether Avrukh offers a solution to this problem -- especially since Roiz (another 5.Nc3 man) doesn't seem to.
  
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kylemeister
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Re: Avrukh GM2a
Reply #12 - 11/03/19 at 16:35:47
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Straggler wrote on 11/03/19 at 08:17:16:
Maybe White has a semi-waiting move that doesn't allow 6...d5, such as 6.h3?

That reminds me of Benko-Fischer, to which it could transpose.  (Benko won, but his h3 isn't considered a try for theoretical advantage as far as I know.)
  
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TD
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Re: Avrukh GM2a
Reply #11 - 11/03/19 at 12:33:13
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mn wrote on 11/02/19 at 17:36:47:
Isn't 5...Nc6 6 Nf3 d5 likely to transpose into Fianchetto Grunfeld main lines?

This move order bypasses Lemos' Grunfeld repertoire for White in The Fianchetto System!
  
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Straggler
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Re: Avrukh GM2a
Reply #10 - 11/03/19 at 08:17:16
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bigpawn wrote on 11/02/19 at 22:35:47:
Doesn't Avrukh try to avoid that position after 8.0-0 because of 8...e5, though?

That would make sense, but I don't see a good way to avoid that position after 5...Nc6 6.Nf3 d5. Maybe White has a semi-waiting move that doesn't allow 6...d5, such as 6.h3?
  
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Re: Avrukh GM2a
Reply #9 - 11/02/19 at 22:35:47
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Doesn't Avrukh try to avoid that position after 8.0-0 because of 8...e5, though? Also 8...Bf5, as played by MVL several times, looks pretty solid.
  
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Re: Avrukh GM2a
Reply #8 - 11/02/19 at 19:51:31
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mn wrote on 11/02/19 at 17:36:47:
Isn't 5...Nc6 6 Nf3 d5 likely to transpose into Fianchetto Grunfeld main lines?

Yes, and 7.cxd5 Nxd5 8.0-0 Nb6 9.e3 is indeed a position that Avrukh reaches via the more normal 4...d5. But Black has a number of alternatives to 8...Nb6, some of which score well. Does Avrukh cover these too? Presumably he doesn't just ignore 5...Nc6 (which is the 4th most popular move) on the assumption that Black will obediently transpose to a line which he could have reached via 4...d5.

Quote:
Also, 5...c6 6 e4 seems nice for White to me.

5...c6 is what the OP asked about, and I agree that 6.e4 is the answer. Against 5...Nc6, 6.e4 is still possible but I'm not sure it's the answer.
  
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mn
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Re: Avrukh GM2a
Reply #7 - 11/02/19 at 17:36:47
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Isn't 5...Nc6 6 Nf3 d5 likely to transpose into Fianchetto Grunfeld main lines? Also, 5...c6 6 e4 seems nice for White to me.
  
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Straggler
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Re: Avrukh GM2a
Reply #6 - 11/02/19 at 11:44:40
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After 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 0-0 5.Nc3, the abridged index also doesn't mention 5...Nc6. I wonder what (if anything) Avrukh suggests here. 6.Nf3 d6 would be the same as 5...d6 6.Nf3 Nc6, but 6.Nf3 might be answered by 6...d5, and he doesn't seem to cover that. As in the case of 5...c6, I suppose 6.e4 is possible, but it's quite rare so I suspect it's not very good.

Roiz too doesn't seem to mention 5...Nc6 in his database for Modern Chess, so I'm probably missing something obvious. But what is it, please?
  
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Re: Avrukh GM2a
Reply #5 - 03/27/18 at 07:20:55
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Actually I'm curious about Avrukh's Benko line as if black plays like Perunovic and skips Bxa6 e.g. 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 g6 6.Nc3 Bg7 7.Nf3 0-0 8.g3 d6 9.Bg2 we end up in the line he wants to avoid with 1.d4 Nf6 2.c4 g6 3.g3 c5 4.dxc5

So he will have to play 7.e4 or 7.a7 or something like that and then whether to do g3 against the "normal" Benko line. He has to keep g3 against the Benoni to work with the Catalan and 6...c5 KID so it doesn't mean anything for the Benko.

Ntrilis gave a short video overview of the lines in the Grunfeld + KID book here: http://www.qualitychess.co.uk/blog/6346

Anyway, GM2A is excellent and I think the new lines compared to GM2 are a huge improvement. Avrukh mentions somewhere his focus is more on smooth development for white than trying to force an advantage and this works well for me.

Biggest issue I have is that I allow the Nimzo so don't need to play the Fianchetto Benoni.  So I would prefer something other than 6...c5 7.d5 in the KID, but best might be 7.0-0 Nc6 8.d5 heading into the Yugoslav mainline that Avrukh avoids...
  
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Re: Avrukh GM2a
Reply #4 - 03/26/18 at 19:43:32
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Thanks for the clarification.
  
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Re: Avrukh GM2a
Reply #3 - 03/26/18 at 17:48:40
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ErictheRed wrote on 03/26/18 at 16:35:34:
What is he calling the Benko Attempt?  Does he no longer advocate playing the Fianchetto variation of the Benko accepted, or is there a different volume that covers the proper Benoni move order 1.d4 Nf6 2.c4 c5 3.d5? 

There will be volume 2B with proper Benko. Here he only examines 1.d4 Nf6 2.c4 g6 3.g3 c5 move order, recommending 4.dc. As he gave fianchetto against Benoni in 1A, I expect he also sticks to g3 against Benko.
  
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ErictheRed
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Re: Avrukh GM2a
Reply #2 - 03/26/18 at 16:35:34
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What is he calling the Benko Attempt?  Does he no longer advocate playing the Fianchetto variation of the Benko accepted, or is there a different volume that covers the proper Benoni move order 1.d4 Nf6 2.c4 c5 3.d5? 
  
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Re: Avrukh GM2a
Reply #1 - 03/26/18 at 10:09:44
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6. e4 and black can either transpose to the KID with 6...d6 or play 6...d5 which is not that pleasant for black after 7.e5.

PS : It's excellent
  
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pioleiva
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Avrukh GM2a
03/26/18 at 07:33:43
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Hello folks,


An excerpt of Avrukh's second edition can be found here: http://www.qualitychess.co.uk/ebooks/GM2A-KingsIndianandGrunfeld-excerpt.pdf

I have a very specific question:

According to the excerpt Avrukh wants to go 1.d4 Nf6 2.c4 g6 3.g3 c6 4.Bg2 d5 5.Qa4!?
I get it, he wants to avoid the mainlines of the solid c6/d5 Grunfeld.

But what is he playing after 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 0-0 5.Nc3 c6 followed by d5?

At least in the index of variations this move order is not mentioned. After 6.Nf3 d5 we are right back in a variation Avrukh wants to avoid.
I cannot imagine Avrukh has overlooked moveorder.

Maybe 6.e4 followed by Nge2?

Is there someone out there owning the book who can clarify? Thanks a lot  Smiley

PS: What is your general opinion on Avrukh's recent effort?
  
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