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

Author: Robert Hyatt

Date: 07:09:37 02/13/01

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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.



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