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Subject: Re: Fritz blunder ?

Author: Dieter Buerssner

Date: 15:44:39 11/22/05

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On November 21, 2005 at 14:55:58, Arifur Rahman wrote:

>The position after 39 Qg3 seems to be a difficult for the chess programs, not
>only for Fritz 9.
>
>I checked the position with Shredder 9.
>
>After 8 minutes at depth 19 Shredder 9 likes the move 39...Bc2?? also. Shredder
>rates the move as the second best (with eval -2.6) after the first choice Qg3.
>
>Maybe both Fritz and Shredder would discard the move totally with faster
>hardware at deeper depth. Maybe Fritz didnt have enough time at move 39, just
>before the time control.

After a long think, Yace suggests Nc4:

2108285081 55:16.7   2.27 17t  1...Qxg3+ 2.Kxg3 f5 3.Bd1 Rc1 4.Kf2 f4 5.Bb3H
                               fxe3+H 6.Rxe3H Nc4H 7.Bxc4H {HT} {-260}
2438050744 1:03:28   2.27 17.  1...Qxg3+ 2.Kxg3 f5 3.Bd1 Rc1 4.Kf2 f4 5.Bb3
                               fxe3+ 6.Rxe3 Nc4 7.Bxc4 {HT} {-260}
  88175191 1:53:48   2.36 18t  1...Qxg3+ 2.Kxg3 f5 3.Bd1 Rc1 4.Kf2 f4 5.Bb3
                               fxe3+ 6.Rxe3 Nc4 7.Bxc4 dxc4 8.Re1 Rxe1 9.Kxe1
                               c3 10.Kf2 Kf8 11.Ke3 c2 12.Nb3 Ke7 13.Nc1 {HT}
                               {90}
1127106290 2:21:17   2.37 18t+ 1...Nc4 2.Qxh4 gxh4 3.Bd1 Ra3 4.Kf2 Ra2+ 5.Kg1
                               Nd2 6.Nc6 Nf3+ 7.Bxf3 exf3 8.Rf1 Bxf1 9.b5
1178113185 2:22:33   2.37 18t  1...Nc4 2.Qxh4 gxh4 3.Bd1H Ra3H {HT}
1913309071 2:40:53   2.37 18.  1...Nc4 2.Qxh4 gxh4 3.Bd1 Ra3
4212173733 3:40:33   2.56 19t  1...Nc4 2.Qxh4 gxh4 3.Bd1 Ra3 4.Nc6 Ra2+ 5.Kh1
                               Kf8 6.b5 axb5 7.axb5 Ra1 8.b6 Rb1 9.b7 Rxb7
                               10.Kg1 Rb6 11.Na7 Rb2 12.Nc6 f6 {160}
 363406809 5:43:15   2.56 19.  1...Nc4 2.Qxh4 gxh4 3.Bd1 Ra3 4.Nc6 Ra2+ 5.Kh1
                               Kf8 6.b5 axb5 7.axb5 Ra1 8.b6 Rb1 9.b7 Rxb7
                               10.Kg1 Rb6 11.Na7 Rb2 12.Nc6 f6 {160}
 916452021 7:49:22   2.80 20t  1...Nc4 2.Qxh4 gxh4 3.Bd1 Ra3 4.Bh5 Ra2+ 5.Kg1
                               Nxa5 6.bxa5 Rxa4 7.Kh1 Rxa5 8.Rg1+ Kf8 9.Rg4
                               Ra3 10.Rf4 Bc4 11.Bxf7 Ke7 12.Bh5 Rxe3 13.Rxh4
                               {160}
2932257232 10:29:50   2.80 20.  1...Nc4 2.Qxh4 gxh4 3.Bd1 Ra3 4.Bh5 Ra2+ 5.Kg1
                               Nxa5 6.bxa5 Rxa4 7.Kh1 Rxa5 8.Rg1+ Kf8 9.Rg4
                               Ra3 10.Rf4 Bc4 11.Bxf7 Ke7 12.Bh5 Rxe3 13.Rxh4
                               {160}
2743110111 16:03:02   2.90 21t  1...Nc4 2.Qxh4 gxh4 3.Bd1 Ra3 4.Nc6 Ra2+ 5.Kh1
                               Kf8 6.Bb3 Rb2 7.Bxc4 dxc4 8.Rc1 Rc2 9.Rxc2 Bxc2
                               10.d5H c3H {HT} {90}

Regards,
Dieter



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