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Subject: Re: On the Harry Schnapp book - intended primarily to Dieter Eberle

Author: Uri Blass

Date: 08:19:27 02/21/06

Go up one level in this thread


On February 21, 2006 at 01:30:34, Gabor Szots wrote:

>On February 20, 2006 at 16:19:48, Dieter Eberle wrote:
>
>>Hi Gabor,
>>none of the lines you posted is bad. They may not be played every day by
>>Kasparov but if you check them with a strong engine like Rybka beta13b you will
>>find out that the maximal deviation from zero is far below +/- 1, a good result
>>for a general book in my opinion.
>>Astonished, Dieter
>
>Hi Dieter,
>
>I submitted all games with the HS book. I did not claim all the lines were bad.
>I said the were bizarre. Most of them is too passive to be good. If an engine
>comes out of the opening with -0.65 (as was the case in Spike vs. Pro Deo) it
>will probably lose against an opponent of its own caliber.
>
>Gábor

I do not agree with it.

-0.65 is not a good predictor of result in the opening.

take the following position from the noomen match

r2q1rk1/3nppbp/b2p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQ1RK1 w - - 0 11

Glaurung say 0.65 pawns for white after a minute of search

It does not mean that the position is good for white.
Note that Movei claims 0.98 pawns for white but in the noomen match between 2
versions of movei black won both games.

I wonder what is the evaluation secret of rybka and how it knows to evaluate the
position as very small advantage for white.

[D]r2q1rk1/3nppbp/b2p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQ1RK1 w - - 0 1

Analysis by Glaurung 1.0.2:

11.Bg5 Ng4
  ²  (0.67)   Depth: 2/6   00:00:00
11.Bh3 Qa5
  ±  (0.75)   Depth: 2/6   00:00:00
11.Bh3 Qa5 12.Bf4
  ²  (0.67)   Depth: 3/6   00:00:00
11.Bh3 Qb6 12.Qc2 Rfb8
  ²  (0.68)   Depth: 4/9   00:00:00
11.Bh3 Qc7 12.Bg5 Bc4 13.Qd2
  ²  (0.60)   Depth: 5/12   00:00:00
11.Re1 Ng4 12.Qa4 Bxc3 13.bxc3
  ²  (0.65)   Depth: 5/14   00:00:00
11.Re1 Ng4 12.Qa4 f5 13.Nb5 Bxb5 14.Qxb5
  ²  (0.68)   Depth: 6/19   00:00:01  19kN
11.Re1 Ng4 12.Bh3 f5 13.Bg5 Bc4 14.e4
  ²  (0.67)   Depth: 7/20   00:00:01  37kN
11.Re1 Ng4 12.Bh3 f5 13.Bg5 Rb8 14.Bxg4 fxg4
  ²  (0.68)   Depth: 8/21   00:00:01  89kN
11.Re1 Qc7 12.e4 Rfb8 13.Bh3 Bc4 14.Nd2 Bd3 15.f4
  ²  (0.64)   Depth: 9/22   00:00:01  198kN
11.Re1 Qb6 12.e4 Ng4 13.Qc2 e6 14.Bh3 Ndf6 15.e5 dxe5 16.Nxe5 Nxe5 17.Rxe5 exd5
18.Nxd5 Nxd5 19.Rxd5
  ²  (0.65)   Depth: 10/27   00:00:02  601kN
11.Re1 Ng4 12.Bh3 Bxc3 13.bxc3 Ndf6 14.Qc2 Bc4 15.e4 Qa5 16.Bg5
  ±  (0.71)   Depth: 11/27   00:00:04  1179kN
11.Re1 Ng4 12.Bh3 Nge5 13.Nxe5 Nxe5 14.Bg5 Rb8 15.Qc2 Bd3 16.exd3 Nf3+ 17.Kh1
Nxg5
  ±  (0.73)   Depth: 12/27   00:00:06  2432kN
11.Re1 Qb6 12.Bh3 h5 13.Qc2 Rfb8 14.Rb1 Qd8 15.e4 Ng4 16.Bg5 Bc4 17.Bxg4 hxg4
  ²  (0.67)   Depth: 13/28   00:00:13  5324kN
11.Re1 Qc7 12.e4 Rfb8 13.Bh3 h5 14.Qc2 Ng4 15.Bg5 e6 16.e5 Ndxe5 17.Nxe5 Bxe5
18.dxe6
  ²  (0.65)   Depth: 14/31   00:00:26  11328kN

(,  21.02.2006)

movei00_8_295 - movei00_8_351, Computer chess game 2006
r2q1rk1/3nppbp/b2p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQ1RK1 w - - 0 1

Analysis by Fruit 2.2.1:

11.Be3
  ²  (0.67)   Depth: 1/1   00:00:00
11.Be3 Ng4
  ±  (0.74)   Depth: 2/4   00:00:00
11.Be3 Ng4 12.Bf4
  ²  (0.34)   Depth: 3/8   00:00:00
11.Bf4 Bc4 12.Bh3
  ²  (0.53)   Depth: 3/8   00:00:00
11.Bf4 Ng4 12.Qc2 Bc4
  ±  (0.71)   Depth: 4/11   00:00:00
11.Bg5 Qb6 12.Qc2 Bc4
  ±  (0.81)   Depth: 4/11   00:00:00
11.Bg5 Qc7 12.Qb3 Rfb8 13.Qc2
  ²  (0.49)   Depth: 5/17   00:00:00
11.Bg5 Nb6 12.Re1 Ng4 13.Qb3 Nc4
  ±  (0.72)   Depth: 6/19   00:00:00  55kN
11.Bg5 Nb6 12.Re1 Nc4 13.Qb3 Rb8 14.Qa4
  ²  (0.38)   Depth: 7/19   00:00:00  91kN
11.Qc2 Nb6 12.Rd1 Bc4 13.Ng5 Ng4 14.Bf4
  ²  (0.42)   Depth: 7/20   00:00:00  188kN
11.Qc2 Nb6 12.Rd1 Bc4 13.e4 Ng4 14.Bf4 Qc7
  ²  (0.53)   Depth: 8/21   00:00:01  329kN
11.Bg5 h6 12.Bf4 g5 13.Bd2 g4 14.Nh4 Ne5
  ²  (0.61)   Depth: 8/24   00:00:01  526kN
11.Bg5 h6 12.Bf4 g5 13.Be3 Ng4 14.Bd2 Bc4 15.Qc2
  ²  (0.43)   Depth: 9/25   00:00:02  649kN
11.Qc2 Nb6 12.Rd1 Bc4 13.e4 Ng4 14.h3 Ne5 15.Be3
  ²  (0.47)   Depth: 9/25   00:00:02  736kN
11.Qc2 Qc7 12.Rd1 Ng4 13.Bg5 Nde5 14.Ne4 Nxf3+ 15.Bxf3 f5 16.Nc3 Bd4
  ²  (0.58)   Depth: 10/25   00:00:04  2138kN
11.Qc2 Qc7 12.Re1 Nb6 13.e4 Ng4 14.Bf4 Bc4 15.h3 Nf6 16.b3
  ²  (0.51)   Depth: 11/26   00:00:07  3887kN
11.Qc2 Bc4 12.Nd2 Ba6 13.Rd1 Ng4 14.Nde4 f5 15.Ng5 Bd4 16.e3 Be5
  ²  (0.57)   Depth: 12/31   00:00:15  8879kN
11.Qc2 Bc4 12.Nd2 Ba6 13.Nde4 Nb6 14.Rd1 Nc4 15.Bf4 Nh5 16.Bg5 Qd7 17.Rac1
  ²  (0.56)   Depth: 13/32   00:00:37  21354kN
11.Qc2 Bc4 12.Nd2 Ba6 13.Nde4 Qb6 14.Bg5 Rfb8 15.Rab1 Qc7 16.Nxf6+ Bxf6 17.Be3
Bc4 18.b3 Bxc3 19.bxc4
  ²  (0.53)   Depth: 14/33   00:00:58  33461kN

(,  21.02.2006)

movei00_8_295 - movei00_8_351, Computer chess game 2006
r2q1rk1/3nppbp/b2p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQ1RK1 w - - 0 1

Analysis by Rybka 1.01 Beta 13d 32-bit:

11.Bg5
  =  (0.15)   Depth: 3   00:00:13
11.Bg5
  =  (0.15)   Depth: 4   00:00:13
11.Bf4
  =  (0.17)   Depth: 4   00:00:13
11.Bf4 Qa5
  =  (0.13)   Depth: 5   00:00:13
11.Bf4 Qc7 12.Qc2
  =  (0.14)   Depth: 6   00:00:13  26kN
11.Bf4 Qc7 12.Qd2 Nb6
  =  (0.10)   Depth: 7   00:00:14  56kN
11.Bf4 Qc7 12.Qd2 Bb7 13.Ng5
  =  (0.12)   Depth: 8   00:00:16  226kN
11.Bf4 Qc7 12.Qd2 Bb7 13.b3 Ng4
  =  (0.11)   Depth: 9   00:00:18  355kN
11.Bf4 Nb6 12.Nd2 Bb7 13.e4 Qc7 14.Bf3
  =  (0.12)   Depth: 10   00:00:27  953kN
11.Bf4 Nb6 12.Nd2 Bb7 13.e4 Qc7 14.Bf3 c4
  =  (0.10)   Depth: 11   00:00:37  1588kN
11.Bf4 Nb6 12.Nd2 Bb7 13.e4 Ra5 14.Nb3 Ra7 15.Bf3
  =  (0.13)   Depth: 12   00:01:48  6179kN
11.Bf4 Qc7 12.Qd2 Nb6 13.b3 Ng4 14.Rac1 Bb7 15.h3 Nf6
  =  (0.12)   Depth: 13   00:02:34  9281kN

(,  21.02.2006)



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