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Very Hot Topic (More than 25 Replies) The Kaufman repertoire (Read 135900 times)
TN
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Re: The Kaufman repertoire
Reply #267 - 08/21/12 at 07:48:45
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After looking at Kaufman's coverage of the Benko, I decided to look at another sideline, the Zurich Variation of the Nimzo-Indian (4.Qc2 Nc6) to see how Kaufman covers this. Unfortunately this isn't one of the strong points of his work - he fails to consider Black's best moves in the key lines and doesn't in any way explain how to play the resulting middlegame positions as White, often just saying that White is better because of the bishop pair or similar at the end of a variation. If you own Palliser's Tango! book and play an opponent relying on Kaufman's repertoire book, you will equalise out of the opening and probably outplay the opponent in the resulting middlegame. 

  

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Neric
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Re: The Kaufman repertoire
Reply #266 - 08/20/12 at 08:28:54
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I edited the relevant section above, but it is difficult to give a suggestion on move 12 when we are talking about compensation that goes deep into the endgame. That is exactly where the computer horizon problem comes into focus.

Nevertheless, I'll make a posting in your Benko topic.
  
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TN
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Re: The Kaufman repertoire
Reply #265 - 08/20/12 at 08:26:56
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I've started a thread on this line in the relevant section (http://www.chesspub.com/cgi-bin/yabb2/YaBB.pl?num=1345425246/3#3) and would be interested to see you back up your explication with some concrete variations.
  

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Neric
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Re: The Kaufman repertoire
Reply #264 - 08/20/12 at 06:38:53
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Let me say something about the positional compensation in the Benko, so it becomes clear.

You have to imagine the a/b-files as a tunnel. Your extra a-pawn has to move through this tunnel, but the tunnel is blocked by black pieces and there is this c5-pawn also that prevents support from your b-pawn. As long as this tunnel or better the walls of this tunnel are in tact, there is no way to get through, because your pieces have to way to support the a-pawn other than from behind.

If black pushes the c-pawn and lets it get exchanged the tunnel is not so narrow anymore. All of a sudden white pieces can penetrate through the b-file. This means black should only touch his c-pawn for very concrete reasons, otherwise he is blowing up his own fortress. Same goes for f5. If black starts action with f5 in the early middlegame, all of a sudden many white pawns disappear from the center and all of a sudden white pieces can take their place. These pieces can support the queenside attack as it happend in every Bologan game in Biel so far.

The key to the black compensation in the Benko is the pawn structure of the black and the white pawns. As long as this structure doesn't change, black is ok. That is why black shouldn't touch the pawns at all and play with nothing but pieces.
  
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Neric
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Re: The Kaufman repertoire
Reply #263 - 08/20/12 at 06:23:07
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First of all, he basically recommends to accept the pawn and then to push it. That is the beginner approach to the Benko. If you don't know theory, this is what you would do. Regardless if it is good or bad, this is exactly what the Benko-player is hoping for and this is the reason why this gambit became popular in the first place.

Second, just check his line. At one point of his analysis he plays c5-c4. This move is just as ridiculous as Bologan's f5. Yes, both c4 and f5 are thematic, but not at this very moment. The move f5 comes in the pawn endgame, where basically all heavy pieces got exchanged and the move c4 comes when a black knight can jump to c5 and to d3. You don't play these moves just whenever you get the chance.

I love Kaufman's comment on 12. Qb6. He gives a few moves including the pointless Qb3 for black and says "White is starting to consolidate his extra pawn". This shows how clueless he is. Consolidation doesn't get white anywhere. It is like consolidating the pawn e5 in the Berlin Defence. Black is perfectly fine with white having an extra pawn, as long as nothing else happens.

The fact that Carlsen and Nakamura have played 12. a4 doesn't mean much. Carlsen has played many lines, many suboptimal lines and even many obscure lines. Since modern players only need a good computer evaluation to give it a go, I am not surprised he chose it. Still, I am convinced that playing like this will get the readers of this book in trouble.

Back to the main topic. In the meantime I have checked a few other lines and I am shocked. If you compare the lines in the Kings Gambit with the new repertoire book from Chess Stars, it becomes clear that Kaufman has a problem. His line in the Kings Gambit is the same, except he recommends weaker moves. Also his line in the Evans Gambit is the result of the game Short-Nielsen, but the guys from Chess Stars improve on this game, so there is no need to deviate. Basically Kaufman with his Elo 2382 is too weak of a player himself to identify the spots in the computer candidate list where it makes sense to investigate deeper. He just lets the computer run for 15 min and then recommends the top line on the list. That is an amateur approach to chess openings and while it may work, it definitely can be improved upon.
« Last Edit: 08/20/12 at 10:19:51 by Neric »  
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Re: The Kaufman repertoire
Reply #262 - 08/19/12 at 21:36:28
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Neric wrote on 08/15/12 at 07:46:06:

Let's not forget that his line agains the Benko is nothing but a joke. Just accept it, play a4 and consolidate your extra pawn. If it was that easy... 
It is rather obvious that neither he nor his engines understand the foundation of the black compensation.


Neric wrote on 08/15/12 at 16:34:50:

We all know that the a-pawn doesn't queen in the Benko, because a8 is controlled by black pieces forever. The knight on b5 gets exchanged by Nf6-e8-c7. This is also a standard maneuver known to every Benko-player. If white wants to win in the classical mainline, then he has to play for a kingside attack while black is trying to win back his pawn. Queening the a-pawn was never the plan for white and a knight on b5 alone does nothing.


I think these comment makes you look bad, not Kaufman. Carlsen, Nakamura, Bologan and virtually everyone else above 1500 who has studied the Benko knows about these classical plans and ideas for Black. Despite that, the early a4 lines are scoring enormously for White on every level at the moment. And that's all an OTB player asks of an opening: Practical results. 

Maybe Black will work out the perfect answer, maybe not, but in the meantime everyone who won with the line can be happy and proud of their work. That's just how opening theory develops.

I must admit that my one tournament game with 12.a4 so far ended in a draw, though I think I was better throughout. It certainly looks like a depressing line to face from the Black side.
  

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Re: The Kaufman repertoire
Reply #261 - 08/19/12 at 14:26:11
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If what Neric says is true, then it seems arrogant to make such scathing judgements against a player clearly stronger than oneself. ...f5 is a common theme in the Benko to undermine the centre and d5-pawn, as the study of any Benko book will demonstrate, and it's very rough to judge a player on the basis of a few games.
  

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Re: The Kaufman repertoire
Reply #260 - 08/19/12 at 13:41:27
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On the ICC coverage to Bologan's last game in the Benko in Biel, pretty much at the very end. It could be in the archives.

Here is a summary of Yermo's comments on Bologan:
- he doesn't even try to find the best move
- he has no idea about the foundation of the compensation of the Benko. This shows with the f5-move that he is so fond of. Basically he should be forbidden to play the Benko
- against Bologan you have to make normal moves and wait, because at some stage he will give the game away
  
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Re: The Kaufman repertoire
Reply #259 - 08/16/12 at 11:11:50
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Where did Yermo say that?? LOL
  

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Re: The Kaufman repertoire
Reply #258 - 08/15/12 at 16:34:50
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The reason was overall playing strength. Carlsen beats everyone with pretty much everything. Besides that, Bologan played like an idiot (...f5) and that is not only my opinion. Yermolinksy said, Bologan should be forbidden to play the Benko.

It is tough to argue with a computer evaluation when it has an extra pawn and obviously doesn't see that it is worthless within the horizon. As long as the computer gives green light, such variations will be played of course - even on the highest level.

We all know that the a-pawn doesn't queen in the Benko, because a8 is controlled by black pieces forever. The knight on b5 gets exchanged by Nf6-e8-c7. This is also a standard maneuver known to every Benko-player. If white wants to win in the classical mainline, then he has to play for a kingside attack while black is trying to win back his pawn. Queening the a-pawn was never the plan for white and a knight on b5 alone does nothing.

The line that is killing the Benko is g3/Rb1 and that is well known also. Khalifman said that he analyzes this position once every year to make it playable for black, unfortunately without success.
  
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Re: The Kaufman repertoire
Reply #257 - 08/15/12 at 16:15:23
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Neric wrote on 08/15/12 at 07:46:06:
Let's not forget that his line agains the Benko is nothing but a joke. Just accept it, play a4 and consolidate your extra pawn. If it was that easy... 
It is rather obvious that neither he nor his engines understand the foundation of the black compensation.


Both Carlsen and Nikamura tried this in the latest Biel tournament. Carlsen jumped right on one of the main idea to put a knight on b5 while Nikamura ( attemted to improve over Carlsen's game -- ChessVibes ) followed Kaufman a litle longer. Both games ended 1-0.
  
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Re: The Kaufman repertoire
Reply #256 - 08/15/12 at 16:09:17
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Of course, we would all prefer such a method. Kaufman seems to be different though. He talks about his private cluster with 12 cores and how long he lets it evaluate each position and so on.

My point is rather simple, I hope. He is using engines to evaluate positions that he cannot evaluate himself. If those engines don't come to a definite conclusion, he (current Elo 2382) jumps in and takes a wild guess. That is ridiculous, especially if you think of it as a scientific approach.

If computers disagree on the evaluation of a position, you simply enter the suggestion of one engine into the other. One engine will prove the other wrong. There is no way around it.

It is true that in the end you will have just another computer evaluation, but that is the overall theme of the whole book after all.
  
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Re: The Kaufman repertoire
Reply #255 - 08/15/12 at 14:33:15
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I haven't read the new book. In the old book Kaufman was fairly generous why he considered one side better or the position equal, not just claim a computer evaluation.

I too have played CC. I much prefer to use one engine and test lines back and forth until I get a decent feeling of the ideas of the computer. It usually refutes most of my own ideas convincingly. Only occasionally do I test position with a second engine.

I too play backgammon. It's a very different game due to the influence of the dice. Letting computer programs play eachother in critical chess positions is an idea, but not a very appealing one. I much prefer humans working with the computer and not let it run without guidance.
  

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Re: The Kaufman repertoire
Reply #254 - 08/15/12 at 14:01:47
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The problem is, that this is not an assessment, it is nothing but gut feeling. He gives no criteria. He just says, I like it. 

Q: How about Carlsen's 12...a6 in the Sicilian Dragon? 
A: I like it!

If computer A thinks that white is better and computer B thinks it is equal, you can't just stop there and take a wild guess. What you should do is, you enter the moves that computer A suggests and answer with the moves that computer B suggests. You can even set up the position and run an engine tournament with alternating colors. At least this approach would have some sort of scientific foundation and it would definitely take care of the horizon-effect. Finally it would be totally in line with his all-engine-approach. In Backgammon they use computers to "roll out" a position also. 

Basically I am advocating some sort of Monte Carlo Simulation, or in a nutshell: If engines disagree, let them play it out.

P.S.: This is how I used to play correspondence chess. I always had multiple engines running to get a second opinion. In case the engines came to different evaluations, I proceeded as recommended and the result was always a definite conclusion.
  
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Re: The Kaufman repertoire
Reply #253 - 08/15/12 at 13:26:32
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Neric wrote on 08/15/12 at 07:46:06:


The really funny thing is that he evaluates positions based on Kommodo and Houdini and if both engines disagree, he tries to play referee like "I would like to play white here". That is ridiculous! Basically the position is unclear, nothing more and nothing less.


How is this funny? He is frank about the assesment of two programs and a fairly strong player himself (with much chess program experience) who gives his own view. Shouldn't it be that way?
  

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