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Up Topic Correspondence Chess / Correspondence Chess / ANTI NIMZO INDIAN VARIATION
- - By AshtavakraGeeta (*) Date 2011-04-14 07:29
Hello Friends,

I always open with 1.Nf3 and in my CC games, I'm often faced with the following variation :
1.Nf3 e6 2.c4 Nf6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3 6.Qxc3 a5
Khalifman has mentioned very little about this variation in his outstanding work, "OPENING FOR WHITE ACCORDING TO KRAMNIK 1.Nf3" Series. I know Black wants to steer the game into the Nimzo Indian Defence with his last move. Is there any way for White to still maintain his slight edge as in the rest of the 1.Nf3 type setups ?
Also, if the game is indeed steered into the Nimzo Indian, which is the best way for White to fight for a win in Correspondence Chess ?
I would be really very grateful if any of the knowledgeable members of this community can enlighten me in this regard.

Any further info on the plans (for both sides) in this variation would be very much appreciated.

ThanQ Very Much In Advance !!

Parent - By RoepStoep (**) [nl] Date 2011-04-15 14:55
Ask Nelson ;)
Parent - - By Nelson Hernandez (Gold) [us] Date 2011-04-15 21:18
Well, your line isn't bad, though personally I would tend to avoid 2.c4 and prefer 2.g3.  If 2...Nf6 then 3.c4, or if 2...d5 then 3.Bg2.

Theory doesn't offer a really definitive line after the position you propose and I would tend to trust a deep evaluation more in this position.  Most popular is 7.b3 with 60.8% success and 38.0% draws, though 7.d3 and 7.g3 seem worthy of further exploration.  7.d4 has not done particularly well with 43.2% and 31.8% draws.

On the Nimzo-Indian, hard to answer your question with specificity as ECOs E20-E59 (that's 40 variations) are all Nimzo.  Ranking the ECOs by their historical success rate I see white's success as follows:

E40  59.2%
E33  57.6%
E44  57.5%
E47  57.0%
E57  56.9%
E37  56.8%
E36  55.2%
E45  55.1%

But bear in mind that these success rates are a bit understated because on average the black player is 20 ELO stronger than the white, at least in my database.  Without question a black player who can successfully steer white into Nimzo has got the right idea and probably is stronger, or at least more clever!
Parent - - By AshtavakraGeeta (*) Date 2011-04-18 00:18
Hi Nelson!

Thanks a lot for the clarification as well as the statistical info!
You are absolutely correct in stating that theory doesn't offer a really definitive line after the position proposed by me. I'll keep it in mind and  the next time I meet 1.Nf3 by 1...,e6 I'll remember not to rush in with 2.c4 and develop calmly instead with 2.g3 followed by fianchettoing the Bishop! :smile:

ThanQ Very Much for clarifying things abt the Nimzo as well - am going to study the variations mentioned by U in more detail now.

- AshtavakraGeeta
Parent - - By Nelson Hernandez (Gold) [us] Date 2011-04-18 01:03
Just to clarify a couple of points I made.  When I said black is 20 ELO stronger, I meant that within the range of E20-E59 generally.  In specific ECOs it will vary, of course.

Another point, which will be obvious once you look at the lines.  Some ECOs are predominantly determined by white moves, some by black.  A King's Gambit opening is driven overwhelmingly by white's f-pawn push.  Same idea goes for various ECOs.  Typically the more empirically unbalanced ones require the weaker side to make a theoretically suboptimal move.
Parent - - By AshtavakraGeeta (*) Date 2011-04-18 05:49
Hello Nelson !

I was a little confused about what you meant by Black being 20 ELO stronger - I understood it now... Thanks!
I am going through the different variations in the ECO but I admit to having ended up being more confused than I was initially ...
Can U suggest any books or articles which might help me in understanding these complex theories ?
Any help or pointers in this direction would be very much appreciated.


Parent - By Nelson Hernandez (Gold) [us] Date 2011-04-18 11:31
No, not really.  Contrary to what you may think I am not a chess expert or even a chess player.  I have been described as a human interface to my big database.  If you want literary Nimzo help you might look and see what Chessbase might be offering.
Parent - - By turbojuice1122 (Gold) [us] Date 2011-05-01 11:58
Black has a fairly even game until playing 6...a5?, which gives white a lasting advantage and winning chances. 

After 1.Nf3 e6 2.c4 Nf6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3 6.Qxc3 a5? 7.b4!, black can try a number of things, but white always ends with a decent positional advantage.

Here is some stuff I've found in IDeA:

1. Nf3 e6 2. c4 Nf6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3 6. Qxc3 a5 7. b4 b6 (7...
d6 8. g3 b6 (8... e5 9. Bg2 Re8 (9... Nc6 10. Bb2 Bg4 11. b5 Ne7 12. h3 Bd7
13. a4)(9... h6 10. Bb2 Nc6 (10... Re8 11. d3 Nc6 12. b5 Ne7 13. O-O) (10...
Bg4 11. O-O Nbd7 12. d3 Re8 13. h3 Be6 14. Qc2)(10... Be6 11. O-O Re8 12. d3
Qd7 13. Nh4 Nc6 14. Qd2 Bh3 15. e4 axb4 16. axb4 Bxg2 17. Nxg2)11. O-O Re8 12.
Rfe1)10. Bb2 Be6 11. d3 Qd7 12. O-O Bh3 13. e4 Bxg2 14. Kxg2)9. Bg2 Bb7 10.
O-O e5 (10... Nbd7 11. d3 c5 12. Bd2)11. d3)(7... Qe7 8. Bb2 d6 (8... b6 9. g3
Re8 10. Bg2 axb4 11. axb4 Rxa1+ 12. Bxa1)9. g3 Nbd7 10. Bg2 Nb6 11. Qc2) 8.
Bb2 Bb7 (8... d6 9. g3 Bb7 (9... Nbd7 10. Bg2 Bb7 (10... c5 11. O-O Bb7))10.
Bg2) 9. g3 d6 10. Bg2 Nbd7 11. O-O c5 12. d3 e5 13. b5 Re8 14. Qd2 Nf8 15. e4
Ne6 16. Nh4 Nd4 17. Rae1 Ra7 18. f4 Bc8 19. Nf3

Of course, there is loads more, but I picked the lines where I think black is fighting the most.  He doesn't blockade the position because of e4 and then f4.  In all the lines I see, I like white's position at the end the best.
Parent - - By TheHug (Bronze) [us] Date 2011-05-01 12:01
I'm guessing you have looked at a few of the games thought Rounds 1 and 2. What game has been your favorite so far? I think most of enjoyed the Stephanie and Ruben match the most.
Parent - - By turbojuice1122 (Gold) [us] Date 2011-05-01 12:04
I haven't really looked at these games yet because once I get going on something I want to analyze, I don't really look at anything else.  I'll probably have a look during the summer. :-)
Parent - - By TheHug (Bronze) [us] Date 2011-05-01 12:07
Thanks. Good to hear friend, like many I wish you the best with marriage coming soon. Hope to hear form you sooner than later once you do that. I'm sure we will have another round in. When you get back, we will have exciting games to come. :wink:
Parent - - By turbojuice1122 (Gold) [us] Date 2011-05-01 12:12
Thank you, though actually, I'm pretty sure that I won't be playing correspondence chess for a long, long time--it has turned out that my job will be very busy again next year, so I'm mainly interested in the "truth" of some various positions.  Looking at one of the games here has made me realize a major hole in my IDeA tree, so now I've got my computer focusing on that, but my direct input is relatively small other than a few "mechanical" techniques that I apply perhaps once every two days.  My total time on chess nowadays is perhaps an hour or two per month.
Parent - By TheHug (Bronze) [us] Date 2011-05-01 12:21
Well I never did image, you playing for a while. I was thinking more of the next round of this tournament. But it looking into the future, you will probably see some bigger names come into the fold. Don't be surprised if you see Auryn tag in here. :smile: And maybe a few other strong players as well.
Up Topic Correspondence Chess / Correspondence Chess / ANTI NIMZO INDIAN VARIATION

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