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Very Hot Topic (More than 25 Replies) Grandmaster Repertoire 1.c4 by Marin (Read 259543 times)
TN
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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #530 - 03/26/12 at 02:58:00
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On a casual glance 8...Bg4 is also possible, though 9.f3 Bc8 10.Nc4 Qd4 11.Ne3 should favour White anyway.
  

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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #529 - 03/04/12 at 11:57:06
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Now let's look how the 'big guys' in correspondent chess treat this pawn sac variation:


Very impressive!..  Cool
  
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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #528 - 02/07/12 at 20:18:11
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good man Johnny boy! At the very serious and probable risk of being laughed at: 8.b3 goes forwards and 8.Ne1 goes backwards. That being said I know nothing of the theory or Marin's ideas after Ne1, I just liked the look of Timman's play.
  
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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #527 - 02/05/12 at 21:06:05
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TonyRo wrote on 02/02/12 at 14:46:06:
10. b4!? does indeed appear to be a novelty according to ChessGames.com and NICBase.

... and more importantly by IM John Bartholomew in his January 2012 Flank Openings Update! Roll Eyes
  
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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #526 - 02/05/12 at 12:36:49
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This is all very interesting, but what do the most recent posts have to do with Flank Openings?
  

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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #525 - 02/05/12 at 12:27:37
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MNb wrote on 02/05/12 at 11:57:00:
topandkas wrote on 02/05/12 at 08:29:46:
I dont know. I thought the Benko was theoretically okay, have I been missing something?

As far as I know there is no clear way to sufficient compensation after 5...d6 6.Nc3 Bxa6 7.g3 g6 8.Bg2 Bg7 9.Nf3. I don't believe in the unnatural 9...Nfd7 and Black's results after 9...Nbd7 10.Rb1 Nb6 11.b3 always have been discouraging.
If the Benkö will be revived my bet is 9...Nbd7 10.Rb1 O-O 11.O-O Qa5 or ...Qb6, arguing that 10.Rb1 has limited White's choice somewhat.


This is Avrukh's recommendation, right? ..Alterman in his new book, recommends 11...Qa5 follow by the natural Rfb8 and looking at his analysis I thought this looks OK (probably slightly better for White). Can you be more specific which line you believe to be bad for Black!?
  
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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #524 - 02/05/12 at 11:57:00
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topandkas wrote on 02/05/12 at 08:29:46:
I dont know. I thought the Benko was theoretically okay, have I been missing something?

As far as I know there is no clear way to sufficient compensation after 5...d6 6.Nc3 Bxa6 7.g3 g6 8.Bg2 Bg7 9.Nf3. I don't believe in the unnatural 9...Nfd7 and Black's results after 9...Nbd7 10.Rb1 Nb6 11.b3 always have been discouraging.
If the Benkö will be revived my bet is 9...Nbd7 10.Rb1 O-O 11.O-O Qa5 or ...Qb6, arguing that 10.Rb1 has limited White's choice somewhat.
  

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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #523 - 02/05/12 at 10:19:05
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True, the Grünfeld, QGD and Slav are all first tier openings and highly topical at the moment but like you I was under the impression that the Benko is playable enough. If my memory serves me correctly, I think Ivanchuk used the Benko in the recent Tata Wijk an Zee to draw Radjabov.
  
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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #522 - 02/05/12 at 08:52:28
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I think the Benkö is theoretically not at the same good status as Grünfeld, QGD, or Slav but playable enough. Not many grandmasters have been using it too often recently.
  

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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #521 - 02/05/12 at 08:29:46
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I dont know. I thought the Benko was theoretically okay, have I been missing something?
  
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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #520 - 02/04/12 at 23:58:30
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Gilchrist is a legend wrote on 02/04/12 at 22:26:57:
Certainly as computers get stronger, the only valid "gambit" that grandmasters will play would be the Queen's Gambit...

Why is that so certain? If there is no refutation no computer will find it, no matter how strong it is. From a practical point, since 15 years or so computers have been used to find new dangerous lines in all kind of gambits as well.
In fact even some titled players are busy to try that with the Benkö, though I agree with little success.
  

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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #519 - 02/04/12 at 22:26:57
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I doubt the Benkö Gambit will be repopularised at top level due to computers. If grandmasters prepare past move 30, surely they will prepare enough to hold a position up a pawn and win by material. Certainly as computers get stronger, the only valid "gambit" that grandmasters will play would be the Queen's Gambit...
  

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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #518 - 02/04/12 at 22:00:12
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Well, according to my special handmade TopCorrDatabase 2006-2011 (where engines' help prevail  Wink ) Benko is not doing very well - 57.7 % for white (mainline 59.5 % accordingly) ..which is too much in correspondence chess. And I have to admit I never played Benko though I thought about it..   Cool
I happened to know the hard way that computer chess engines are very, very good defenders...and I don't allow myself to underestimate their power. I try to concentrate on some of their weaknesses instead.  Wink
Back to the topic: I'm very happy that because of Marin (and not only) the variation we discuss here attracted the attention of many good chess players again. Now Timman...tomorrow Carlsen or Aronian?.. Who knows?  Cool
  
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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #517 - 02/03/12 at 11:57:31
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Vass wrote on 02/03/12 at 08:46:14:
Great game by Timman! One of my favourite players of all time.  Wink
As a correspondence chess player I always suspect positional pawn sacs as not healthy for obvious reasons (i.e. computers are way better in defending such positions with a pawn up than an OTB player). Not in this case though. I spent more than 2 hours trying to strengthen the black defence after the pawn sac. And what amazed me was the fact that even after the queens' exchange black was not ok. On the contrary, black's position went down like a cardboard house. Well, I don't say white is winning after the pawn sac, no...not at all. But, I say that this straight b3-idea is good enough to be played even in the correspondence chess at the very highest level.  Cool


I would think that the positional pawn sacs are good in correspondence chess because computers may have problems evaluating them correctly.

Anyway, to me, the positions get a kinda Benko feeling, even after the queens come of.

As a follow-up, OT-question, how is the Benko doing in correspondence?
  
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Re: Grandmaster Repertoire 1.c4 by Marin
Reply #516 - 02/03/12 at 08:46:14
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Great game by Timman! One of my favourite players of all time.  Wink
As a correspondence chess player I always suspect positional pawn sacs as not healthy for obvious reasons (i.e. computers are way better in defending such positions with a pawn up than an OTB player). Not in this case though. I spent more than 2 hours trying to strengthen the black defence after the pawn sac. And what amazed me was the fact that even after the queens' exchange black was not ok. On the contrary, black's position went down like a cardboard house. Well, I don't say white is winning after the pawn sac, no...not at all. But, I say that this straight b3-idea is good enough to be played even in the correspondence chess at the very highest level.  Cool
  
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