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Hot Topic (More than 10 Replies) C07 : Tarrasch - early 6.b5 (Read 1881 times)
mn
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Re: C07 : Tarrasch - early 6.b5
Reply #12 - 03/15/17 at 23:52:34
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Also I just noticed Post #7 which mentions 8...a5. My computer likes this move, although I have to admit I find Black's compensation here less obvious than in the ...cxd4/...a6 lines.

In this case I think White should start with 9 Ne2!, blocking the a6-f1 diagonal so we can get castled at some point. 9...Ba6 10 Bxa6 Qxa6 and now 11 Nf3 (or even 11 f4!?), and I'm not totally sure how Black continues.

On 11...Nc6, we castle (12 0-0 Qxe2 13 Qxc6), and on 11...Be7, we first play 12 Qc2 (or 12 Qd1) and then castle. Black has the b-file to do stuff on, sure, but is there really anything too threatening?
  
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Re: C07 : Tarrasch - early 6.b5
Reply #11 - 03/15/17 at 23:43:22
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Alright, admittedly I was a little overly optimistic about 7 Ne2. I've sat down and had a less superficial look at this line.

So 7 Bxb5 must be critical, when play continues 7...Qb6 8 Qa4 a6 (or 8...cxd4 9 cxd4 a6 etc.) 9 Bd3 Nc6 10 Ngf3 (10 Ne2 is also possible, although 10...Nb4 11 Bb1 a5 seemed slightly inconvenient. With the text, ...Nb4 can be met by Be2 followed by a3)

I only managed to find one game with 10 Ngf3:



Black wound up regaining his pawn with a slightly better position (albeit not enough to win). 23 Qa2 Qb5 24 Nd2 saves the pawn with some chances for a bit of an edge, but clearly Black has decent play. Backing up further, 21 Qd2! looks better than the move played. First of all, 21...axb3 22 axb3 Na5?? is bad due to the Ra1 pin. Secondly, the immediate 21...Na5 fails to make a huge impression because of simply 22 Rfc1 Rxc3 23 Bxc3. Should Black not be able to put pressure on b3 straight away, I think I like White's chances.

Of course, this is just one way the game can go after 10 Ngf3, but in general I prefer White's extra pawn - Black gets some Benko-y play on the Queenside, but with careful defense it looks like White should come out ahead.
  
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Re: C07 : Tarrasch - early 6.b5
Reply #10 - 03/14/17 at 08:11:40
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Even the "best case scenario" for Black doesn't seem all that appetizing to me. Like, if White pretends nothing's happening and goes 7 Ne2 b4 8 0-0 Nc6 9 f4 Qb6 10 Nf3, Be3, and soon f4-f5. I'm not entirely sure what Black's Queenside demonstrations are meant to be accomplishing.

Black surely has other options: 8 ....Ba6!?; 9 ...g6!?.
  
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Re: C07 : Tarrasch - early 6.b5
Reply #9 - 03/14/17 at 01:13:21
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Even the "best case scenario" for Black doesn't seem all that appetizing to me. Like, if White pretends nothing's happening and goes 7 Ne2 b4 8 0-0 Nc6 9 f4 Qb6 10 Nf3, Be3, and soon f4-f5. I'm not entirely sure what Black's Queenside demonstrations are meant to be accomplishing.
  
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Re: Tarrasch - early 6.b5
Reply #8 - 03/13/17 at 18:50:50
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This Topic was moved here from French [move by] dom.

Sorry posters  Wink  I moved the topic here because it's better classified under the Tarrasch lines than under general french line (main French forum).

Oh,Oh... "Senegalese surprise" ... I can put it into my list of funny names of sub-variations

  

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Michael Ayton
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Re: Tarrasch - early 6.b5
Reply #7 - 02/09/17 at 10:13:33
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Yup, in a book "Opening Originals:  Strong Sidelines for Club Cats" by NM Daniel Lowinger.

Ah, that's where it was! I must have seen an online sample or something.

After 7 Bb5 Qb6 8 Qa4 it looks like Black can start his play in no fewer than three ways, 8 ...a6, 8 ...cd and 8 ...a5. Has theory here crystallised in any way, I wonder?
  
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Re: Tarrasch - early 6.b5
Reply #6 - 02/09/17 at 02:40:24
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Michael Ayton wrote on 02/09/17 at 01:30:34:
I seem to recall this 6 ...b5 idea being touted somewhere as the "Senegalese Surprise", along with the "Polish" something-or-other, which if my memory serves was 6 ...Nc6 7 Ne2 a5!?.

6 ...b5!? strikes me as a serious try! I remember looking at this in the pub after chess club one night last year with an ECF ~200 player, and after 7 Bb5 Qb6 we couldn't see any obvious route to advantage for White. But if White declines, isn't Black gaining ground (e.g. 7 Ndf3 b4!?)?


Yup, in a book "Opening Originals:  Strong Sidelines for Club Cats" by NM Daniel Lowinger.
As for not taking the pawn, my first thought was that it should be like letting Black get away with murder ...

I see that IM Felix Graf has played 6...b5 a number of times, including last November in the Bundesliga (against an essentially equal opponent).  There are a few remarks about that game on this page (scroll to diagram of the move in question):  http://beyond-chess.com/schachbundesliga-trier-part-ii/
  
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Michael Ayton
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Re: Tarrasch - early 6.b5
Reply #5 - 02/09/17 at 01:30:34
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I seem to recall this 6 ...b5 idea being touted somewhere as the "Senegalese Surprise", along with the "Polish" something-or-other, which if my memory serves was 6 ...Nc6 7 Ne2 a5!?.

6 ...b5!? strikes me as a serious try! I remember looking at this in the pub after chess club one night last year with an ECF ~200 player, and after 7 Bb5 Qb6 we couldn't see any obvious route to advantage for White. But if White declines, isn't Black gaining ground (e.g. 7 Ndf3 b4!?)?
  
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Re: Tarrasch - early 6.b5
Reply #4 - 02/08/17 at 19:25:35
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I found 7 games with players over 2400 and +3 -3 =1.

Wouldn't be 7.Ndf3 the natural next move with the normal plans in this position? 7.Bxb5 is something to play after some homework.
  

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Re: Tarrasch - early 6.b5
Reply #3 - 02/08/17 at 17:43:04
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Sure, it might be some effort for white to win but still Smiley Or do the computers like it somehow?
  
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Re: Tarrasch - early 6.b5
Reply #2 - 02/08/17 at 15:57:55
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White gets an extra pawn (on b2, after exchanges on d4) no doubt, but black gets a lot of pressure on the queenside.
Light squared bishops often come off due to ba6 - the resulting positions seem very difficult for white to make progress...
  
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Re: Tarrasch - early 6.b5
Reply #1 - 02/08/17 at 15:50:22
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Enlighten me, where does this 'lot of play' stem from? Looks like black is ditching a pawn for no reason to me Smiley
  
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C07 : Tarrasch - early 6.b5
02/08/17 at 15:31:06
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Any suggestions how to play against:
1. e4 e6
2. e4 d5
3.  nd2 nf6
4. e5 nfd7
5. bd3 c5
6. c3 b5

Blacks seems to get a lot of play if white takes the b5 pawn, and seems to have a nice game if white does not take the pawn.
Thanks.
« Last Edit: 03/13/17 at 18:51:42 by dom »  
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