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Normal Topic Fajarowicz - Bonsdorff variation with 4.a3 (Read 2853 times)
tracke
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Re: Fajarowicz - Bonsdorff variation with 4.a3
Reply #2 - 11/30/04 at 07:48:33
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First, without any own opinion or proofreading I just refer to
Lev Gutman: Budapest Fajarowicz, Batsford april04
what has 2 narrow printed pages of analysis to 5.Qd5.
I give the main lines and Gutman´s assessments:

1.d4 Nf6 2.c4 e5 3.dxe5 Ne4 4.a3 b6 5.Qd5
- 5...Nc5 6.Nc3! Bb7 7.Qd1 g6 8.Nf3 Ne6 9.Nd5 Bg7 10.Bd2 d6! 11.exd6 c6 12.Nc7+ Nxc7 13.dxc7 Qxc7 14.Qc2 0-0 15.Bc3 Bxc3+ 16.Qxc3 c5 17.e3 Nd7 18.Be2 Rae8 19.0-0 f5 20.Rad1 Nf6 "with enough counterplay in each case" (Gutman).
- 5...Bb7 6.Qxb7 Nc6 7.Nc3! Nc5 8.Bg5 f6 9.exf6 gxf6 10.Bxf6 Qxf6 11.Qxa8+ Kf7 12.g3 Bg7 13.Qxh8 Bxh8 14.Bg2 Na5 15.Rc1 Qg6 16.Bd5+ Kf8 17.Nh3 c6 18.Nf4 Bxc3+ 19.bxc3 Qf6 20.Bf3 Nxc4 21.0-0 a5 "leads to a balanced position" (Gutman).

* * *

There is much more analysis, if you´re interested you should buy the book!? Maybe the Fajarowicz is not sound but an analysis should defintely start with Gutman´s book.

Though I am a slav player I bought this book just for fun or maybe to work out a surprise weapon. In the worst case it is still a nice training book for tactics Smiley

Some statements:

According to Gutman (and meanwhile I believe him) anything else than 4.a3! is no problem for Black. After 4.Qc2, 4.Nf3 or 4.Nd2 (everything else is bullshit!) White can maybe keep a very slight advantage by correct  play (if he knows theory) but nothing special. 4.a3! is the only problem!

After 4.a3! the Vasconcellos variation 4...Qh4 is bad! And 4...a5?! or 4...Nc6?! remains "playable" in that sense that white is a pawn up in very unclear positions. This leaves the old 4...d6 and the modern 4...b6 .

It is interesting to notice Gutman himself playing 4...d6 5.Nf3 Bf5 (!? ... with "enough play for the pawn") in his few serious games (Levin2531-Gutman2489, germany2001, draw62) while paying more attention to 4...b6 in his published analysis.

About 4.a3! b6 5.Nd2 Bb7 6.Ngf3 Nxd2! 7.Bxd2 Qe7 there has been a disput between Gutman and Sadler in NiC-magazine (2004/4) and also an article in NiC-yearbook (no.??). While Gutman claims sufficient compensation for Black after 8.Bc3 g6! or 8.Qc2 Qe6! 9.Bf4 Nc6 , Sadler still states White being a pawn up: "... I don´t agree that you can stop after move 9 in a position where Black is a pawn down and has moved his queen twice and just say that he has sufficient counterplay: the onus of proof is on Black, not on White in this position"

  
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Björn
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Re: Fajarowicz - Bonsdorff variation with 4.a3
Reply #1 - 11/30/04 at 05:11:41
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Maybe rather 5...Nc5, if 6.Qxa8 then 6...Bb7 7.Qxa7 Nc6, I'm not sure whether 5...Bb7 works.
  
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Bonsai
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Fajarowicz - Bonsdorff variation with 4.a3
11/29/04 at 19:03:05
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In my chess club a couple of my friends and I had a look at the position after 1.d4 Nf6 2.c4 e5 3.dxe5 Ne4 4.a3 b6 5.Qd5 Bb7 6.Qxb7 Nc6. All I really knew about this was from an old article in Kaissiber, where correspondence-chess-IM Kjell Krantz claimed that the idea 4...b6 was playable after 4.Nf3 and even better after 4.a3.

When we analysed these positions we thought that the main independet idea for white in the lines with 4.a3 is 7.b4 and that this had to be white's best try, but then discovered that this doesn't give white much due to e.g. 7...Rb8 8.Qa6 Nxf2.

At home I went over our analysis with the computer and pretty much confirmed it, but then I discovered that the computer recommened a different move for white on move 7:
7.Nc3 with the following ideas:

A.
7...Nc5 8.Bg5 seems to be good for white.

B.
7...Nxc3 8.bxc3 a6 9.Bg5 Be7 10.Bxe7 Kxe7 11.Rd1! and white can save himself by playing Qxc6 and seems to be better.

The funny thing is that the same idea does not work after 1.d4 Nf6 2.c4 e5 3.dxe5 Ne4 4.Nf3 b6 5.Qd5 Bb7 6.Qxb7 Nc6, because following 7.Nc3 Nc5 8.Bg5 Be7 9.Bxe7 Nxe7! the knight blocks the f3 square to which the white queen can escape in the corresponding variation after 4.a3.

Maybe I'm overlooking something or just not looking into the position deeply enough or does white actually get an advantage in the 4.a3 b6 5.Qd5 variation?
  
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