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Subject: Re: crafty under-estimate R against 2p

Author: Vincent Lejeune

Date: 09:42:45 02/13/01

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On February 13, 2001 at 10:09:37, Robert Hyatt wrote:

>On February 13, 2001 at 07:58:17, Vincent Lejeune wrote:
>
>>
>>We are in late-middlegame-early-endgame :
>>
>>3n4/ppk4p/2p3p1/2b2p2/P4P2/2N3K1/1PP5/4R1N1 b - - 0 30
>>
>>
>>Crafty 18.01 gives only +2.50 for white here.
>>Hiarcs 7.32 give +4.00 (as I would judge this position too)
>
>
>You are doing something wrong.  Here is the search output from
>18.1:
>
>                8->   1.79   4.52   1. ... Nf7 2. Nh3 Bd6 3. Kf3 h5 4.
>                                    Re6 Bxf4 5. Rxg6
>                9     2.59   4.56   1. ... Nf7 2. Nf3 Bd6 3. Ne2 Kb6 4.
>                                    Nh4 Ng5 5. Nd4 Kc5
>                9->   3.50   4.56   1. ... Nf7 2. Nf3 Bd6 3. Ne2 Kb6 4.
>                                    Nh4 Ng5 5. Nd4 Kc5
>               10     5.48   4.69   1. ... Nf7 2. Nf3 Bd6 3. Nd4 h5 4.
>                                    Kf3 Kb6 5. Re6 g5 6. fxg5 Nxg5+
>               10     8.45   4.52   1. ... Bd6 2. Nf3 h5 3. Re8 Kd7 4.
>                                    Rg8 Ne6 5. Rxg6 Bxf4+ 6. Kh4 Nf8
>         (2)   10->   9.32   4.52   1. ... Bd6 2. Nf3 h5 3. Re8 Kd7 4.
>                                    Rg8 Ne6 5. Rxg6 Bxf4+ 6. Kh4 Nf8
>               11    11.36   4.61   1. ... Bd6 2. Nf3 h5 3. Re8 Kd7 4.
>                                    Rg8 Ne6 5. Rxg6 Bxf4+ 6. Kh4 Bc1 7.
>                                    Ne5+ Kd6
>               11->  15.38   4.61   1. ... Bd6 2. Nf3 h5 3. Re8 Kd7 4.
>                                    Rg8 Ne6 5. Rxg6 Bxf4+ 6. Kh4 Bc1 7.
>                                    Ne5+ Kd6
>
>I don't know whether you set the position up wrong or what, but obviously
>it doesn't think this is +2.

The only wrong think I've done is running crafty as engine in chessbase
interface, it's 1st time i see such difference in evaluation between the 2
version :((((

Chessbase probably have done something wrong !



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