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Subject: Re: Strange engine analysis differences... strange indeed

Author: Kurt Utzinger

Date: 22:56:08 09/22/03

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On September 23, 2003 at 01:43:02, Kurt Utzinger wrote:

>On September 22, 2003 at 13:35:56, Pete Waring wrote:
>
>I was comparing the results from a few engines for analysis purposes (trying to
>decide what engines I like to help with blunder checking), and got some strange
>answers for the following position:
>
>[D]r1bqr1k1/p4p1p/2p1n1p1/3p4/1B3Q2/P2B4/5PPP/2R3K1 w - - 0 1
>
>Some engines, such as Fritz 6, Ruffian 1.0.1, and Little Goliath 3.6, show the
>position as being equalized after Qf3, while others, like Shredder 6.02, Crafty
>19.03 and Yace Paderborn show black as clearly winning after Qf3.  Two examples:
>
>Analysis by Fritz 6:
>
>1. = (0.00): 29.Qf3
>2. -+ (-6.31): 29.Qe5 c5 30.Bc3 Nd4 31.Qg3 Nf5 32.Qf4 c4 33.Bxf5 Bxf5
>3. -+ (-6.34): 29.Qd2 a5 30.Bc3 d4 31.Bb2 c5 32.Bc4 Rb8 33.Re1 Qf6
>4. -+ (-6.50): 29.Qe3 a5 30.Bd2 c5 31.Qg3 Ba6 32.Bxa6 Rxa6 33.Qg4 Qd6


     Strange indeed. My Fritz6c never shows 29.Qf3 with
     an evaluation of 0.00

     Utzinger,K - Fritz 6
     r1bqr1k1/p4p1p/2p1n1p1/3p4/1B3Q2/P2B4/5PPP/2R3K1 w - - 0 1

     Analysis by Fritz 6:

     1.Dg3 Sd4 2.Ld6 Df6
     -+  (-5.75)   Tiefe: 4/9   00:00:00  1kN
     1.Dg3 Sd4 2.Ld6 Df6
     -+  (-5.75)   Tiefe: 4/9   00:00:00  1kN
     1.Dg3 Sd4 2.Ld6 Df6
     -+  (-5.75)   Tiefe: 4/9   00:00:00  1kN
     1.Dg3 Sd4 2.Ld6 Df6
     -+  (-5.75)   Tiefe: 4/9   00:00:00  1kN
     1.Dg3 Sd4 2.Ld6 Df6
     -+  (-5.75)   Tiefe: 4/9   00:00:00  1kN
     1.Dg3 Sd4 2.Ld6 Df6
     -+  (-5.75)   Tiefe: 4/9   00:00:00  1kN
     1.Dg3 Sd4 2.Ld6 Df6
     -+  (-5.75)   Tiefe: 4/9   00:00:00  1kN
     1.Dg3 Sd4 2.Ld6 Df6
     -+  (-5.75)   Tiefe: 4/9   00:00:00  1kN
     1.Dg3 Sd4 2.Ld6 Df6
     -+  (-5.75)   Tiefe: 4/9   00:00:00  1kN
     1.Dg3 Sd4 2.Df4 Te4 3.Dg3
     -+  (-5.69)   Tiefe: 5/12   00:00:00  7kN
     1.Dg3--
     -+  (-6.00)   Tiefe: 6/14   00:00:00  31kN
     1.Dg3--
     -+  (-6.00)   Tiefe: 6/14   00:00:00  31kN
     1.Df3!
     -+  (-5.97)   Tiefe: 6/14   00:00:00  36kN

     1.Df3! a5 2.Lc3 Dg5 3.Te1 c5
     -+  (-5.87)   Tiefe: 6/14   00:00:00  42kN
     1.Df3 c5 2.Lc3 Dg5 3.Tb1 Sf4 4.Lc4
     -+  (-6.03)   Tiefe: 7/18   00:00:00  88kN
     1.Df3 c5 2.Lc3 Dg5 3.Tb1 Sf4 4.Lc4 Dxg2+ 5.Dxg2 Sxg2
     -+  (-6.12)   Tiefe: 8/19   00:00:00  185kN
     1.Df3 c5 2.Lc3 Dg5 3.Te1 Tb8 4.Lf6 Dd2 5.Td1
     -+  (-6.22)   Tiefe: 9/20   00:00:00  467kN

     1.Dh6!
     -+  (-6.19)   Tiefe: 9/20   00:00:00  662kN
     1.Dh6! Dc7 2.De3 Ld7 3.Ld2 Dd6 4.La6 c5 5.Dd3
     -+  (-6.16)   Tiefe: 9/20   00:00:01  907kN
     1.Dd2!
     -+  (-6.12)   Tiefe: 9/20   00:00:01  980kN
     1.Dd2 a5 2.Lc3 d4 3.Lb2 c5 4.Te1 Df6 5.Lc1 Lb7
     -+  (-6.28)   Tiefe: 10/20   00:00:01  1356kN

     1.Df3!
     -+  (-6.25)   Tiefe: 10/22   00:00:02  1860kN
     1.Df3--
     -+  (-6.56)   Tiefe: 11/21   00:00:03  3310kN
     1.Df3--
     -+  (-6.56)   Tiefe: 11/28   00:00:04  3984kN

     1.Dd2!
     -+  (-6.53)   Tiefe: 11/28   00:00:04  4348kN
     1.Dd2! a5 2.Lc3 d4 3.La1 c5 4.Lc4 De7 5.Te1 Df6
     -+  (-6.25)   Tiefe: 11/28   00:00:05  5488kN
     1.De5!
     -+  (-6.22)   Tiefe: 11/28   00:00:07  6945kN
     1.De5 c5 2.Lc3 Sd4 3.Df4 Se2+ 4.Lxe2 Txe2 5.Df3 Dg5
     -+  (-6.28)   Tiefe: 12/25   00:00:09  9127kN
     1.De5 c5 2.Lc3 Sd4 3.Dg3 Sf5 4.Df4 c4 5.Lxf5 Lxf5
     -+  (-6.34)   Tiefe: 13/27   00:00:19  19216kN
     1.Dd2!
     -+  (-6.31)   Tiefe: 13/32   00:00:32  31510kN
     1.Dd2 a5 2.Lc3 d4 3.Lb2 c5 4.Te1 La6 5.Le4 Tc8
     -+  (-6.59)   Tiefe: 14/30   00:00:59  58506kN
     1.De5!
     -+  (-6.56)   Tiefe: 14/30   00:01:09  67373kN
     1.De5! c5 2.Lc3 Sd4 3.Dg3 Se2+ 4.Lxe2 Txe2 5.Dd3 Ta2
     -+  (-6.41)   Tiefe: 14/31   00:01:40  97380kN

(Utzinger, MyTown 23.09.2003)







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