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Etienne Bacrot vs Peter Leko
Morelia-Linares (2006), Morelia MEX, rd 5, Feb-23
Queen's Indian Defense: Fianchetto. Check Variation Intermezzo Line (E15)  ·  1/2-1/2

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Feb-23-06  EmperorAtahualpa: First!

Not a very exciting game..

Feb-23-06
Premium Chessgames Member
  tamar: High class defense by Leko.

23...Re6 is the key that keeps Black's head above water.

<AdrianP> has some thoughts on the Leko page that are very interesting. I think one of his points is that Leko sucks the life out of the position as Black, making it extremely hard for White to sustain an initiative.

You can see this here. Leko makes the least concessions possible after 22 Qf3, and when there is the possibility of even hunting for winning chances with 28...Qa4, Leko chooses the supersolid 28...h6.

Feb-24-06  diction: i agree with all
not exciting, but brilliant defence by leko, truly worldclass

there is much left to play for though...give us Sofia draw rules in all major tournament,please

Jul-11-06  percyblakeney: I read somewhere that 25. Qg4 maybe could have caused black some more trouble than the played Rg4.
Feb-13-07  RandomVisitor: Here is a quick analysis: It seems White made some mistakes that allowed Black to equalize:

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 c6 8.Bc3 d5 9.Ne5 Nfd7 10.Nxd7 Nxd7 11.Nd2 0–0 12.0–0 Rc8 13.e4 b5 14.Re1 0.07/18 14...dxe4 0.16/17
[Rybka 14...dxc4 0.07/18]

15.Bxe4 Nf6 0.17/23 15...bxc4 0.22/18
16.bxc4 0.18/18
[Rybka 16.Nxc4 0.22/18]

16...c5 0.29/18
[Rybka 16...Nb6 0.18/18]

17.d5 0.29/17 17...exd5 0.30/17
18.Bxd5 0.32/19 18...Bf6 0.35/18
[Rybka 18...Nb6 0.32/19]

19.Ne4 0.29/19
[Rybka 19.Rc1 0.35/18]

19...Bxc3 0.30/18
20.Nxc3 0.31/18 20...Nb6 last book move, 0.31/18
21.Re4 0.26/18
[Rybka 21.Qh5 0.31/18]

21...Re8 0.27/18
22.Qf3 0.26/19 Nxd5 0.27/18
23.Nxd5 0.35/18 Re6 0.41/17
24.Rd1 0.47/19 Qe8 0.57/18
25.Rg4= 0.24/16
[Rybka 2.2n2 mp : 25.Qg4 Kh8 26.Rxe6 fxe6 27.Nc3 Qc6 28.Ne4 Bb7 29.Re1 Kg8 30.Qd1 Qb6 31.Qc2 h6² 0.57/18 ]

25...Kh8 0.24/14
26.Qc3= 0.06/14
[Rybka 2.2n2 mp : 26.Ne3 Rb8 27.Rf4 f6 28.Rf5 Bb7= 0.24/14 ]

26...f6 0.07/14 27.Rf4= 0.00/16
[Rybka 2.2n2 mp : 27.Rh4 Bb7 28.Rb1 Rb8 29.h3 Kg8 30.Qd3 h6 31.Kh2 Re1 32.Rxe1= 0.07/14 ]

27...Bb7= 0.08/15
[Rybka 2.2n2 mp : 27...Qc6 28.a3 Rce8 29.Rh4 Re2 30.Qd3 h6 31.Kf1 R2e5 32.Qg6 Qa4 33.Rxh6+ gxh6 34.Qxh6 0.00/16 ]

28.Rf3 0.06/16 h6= 0.08/16
[Rybka 2.2n2 mp : 28...Bc6 29.Rfd3 Re2 30.Nf4 Rxa2 31.Rd6 Qe4 32.f3 Qe7 33.Rxc6 Rxc6 34.Qb3 g5 35.Qxa2= 0.06/16 ] ½–½

Feb-13-07  patzer2: RV,the very small increase in valuations Rybka is putting on its "improvements" doesn't seem to warrant the conclusion that White's moves were "mistakes" for the following reasons:

(1) Bacrot is playing Leko, and not Rybka. The moves Bacrot is making are intended to exploit potential weaknesses in Leko's defensive (human) style.

(2) The valuations of Rybka's "improvements" are not significant enough, especially without testing, to indicate whether they give White any real winning chances.

(3) Advantages with strong play will either increase or diminish. There's nothing here to suggest Rybka's "improvements" provide any lasting advantage/initiative.

(4) IMO Rybka's, as with most other chess programs, assessment of small positional advantages is at best sometimes suspect and at worst sometimes wrong. IMO Rybka's preference for an early weakening ...f5 (shunned by nearly every GM or IM playing this line as Black in the past three years) in this line is just one example.

P.S.

A good example of how computers badly assess positional play can be seen in following the games of Anand and Topalov with computers. Topalov's exchange sacrifices, for example, are nearly always shown as giving his opponent the "advantage" when in reality they usually give him a risk free initiative with winning chances.

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