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Subject: Re: Bug in Fritz 8 [reproduction impossible]

Author: Kurt Utzinger

Date: 06:30:36 12/31/02

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On December 31, 2002 at 09:01:55, Bob Durrett wrote:

>In the following position, with Black to move, Fritz 8 says the correct move is
>Re8.  It gives a position evaluation of 0.00
>
>5r1k/pp1p2pp/n4q2/2pB4/2P2r2/8/PP2QPPP/R4RK1 b - - 0 18
>wKg1,Qe2,Bd5,Ra1,f1,Pa2,b2,c4,f2,g2,h2/bKh8,Qf6,Na6,Rf4,f8,Pa7,b7,c5,d7,g7,h7
>
>I forgot how to display the position here.  Maybe someone will do it for me.
>
>Bob D.

This "bug" cannot be reproduced by Fritz8 (8.0.0.5) on P4 1.4/32 MB hash:

New game
[D]5r1k/pp1p2pp/n4q2/2pB4/2P2r2/8/PP2QPPP/R4RK1 b - - 0 1

Analysis by Fritz 8:

1...b6 2.Rad1 Nc7 3.Bf3 Re8 4.Qd3 Qxb2 5.Qxd7
  =  (0.00)   Depth: 7/19   00:00:00  58kN
1...b6 2.Rad1 Nc7 3.Be4 Re8
  =  (0.06)   Depth: 8/19   00:00:00  126kN
1...b6 2.Rad1 Nb4 3.Be4 Qe6 4.f3 Nxa2 5.Ra1 Nb4 6.Rxa7
  =  (0.16)   Depth: 9/22   00:00:00  367kN
1...b6 2.Be4 Nb4 3.g3 Qg5 4.Kh1 R4f7 5.f4 Qh6 6.Rad1 Nxa2
  =  (0.09)   Depth: 10/26   00:00:03  1997kN
1...b6 2.Be4 Nc7 3.g3 Qg5 4.Qd3 Ne6 5.Qd5 R4f7 6.f4 Qf6
  =  (0.22)   Depth: 11/27   00:00:06  4166kN
1...b6 2.g3 Rf5 3.Be4 Re5 4.Rad1 Re7 5.f3 Nb4 6.a3 Nc6
  =  (0.16)   Depth: 12/29   00:00:18  12244kN
1...b6 2.g3 Rf5 3.Be4 Re5 4.Rad1 Re7 5.Qg4 Rff7 6.f3 Qxb2 7.Qh5 h6
  =  (0.09)   Depth: 13/38   00:00:36  24746kN
1...b6 2.g3 Rd4 3.Rad1 Rxd1 4.Rxd1 Nc7 5.Be4 Ne6 6.Rxd7 Nd4 7.Qe3 a6
  =  (0.12)   Depth: 14/40   00:01:03  43776kN

(Utzinger, MyTown 31.12.2002)

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