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Subject: Re: A test position from Fisher-Geller

Author: Dieter Buerssner

Date: 11:23:14 09/16/01

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On September 15, 2001 at 23:37:17, Uri Blass wrote:

>How much time do your programs need to find 19.Qf1?

See below.

>Deep Fritz on PIII850(64 Mbytes hash) needed more than 2 hours to find this move
>and even after more than 5 hours it cannot se that the line 19.Qf1 Nxe4 is a
>clear advantage for white.
>
>Deep Fritz missed 24.h4 in it's main line.

In the line below (Yace gets the same line), when doing all the moves, Yace sees
a big advantage for Qg4 soon (and also a big but smaller advantage for h4).

[Deep Fritz]
>19.Qf1 Nxe4 20.Qf4 cxb2 21.Rh5 Nf6 22.Rh6 Ne4 23.Qf5 Ng5 24.Qg4
>  =  (0.03)   Depth: 17/46   05:09:19  10158100kN

Yace, K6-2 475, 35M hash:

   8110597  1:05.5  -0.82  8.  1.Bxc3 Qxe4 2.Rf2 d5 3.Qa6 Rc8 4.Re1 Qh4 5.Rfe2
                               {-180}
  10157809  1:24.0  -0.69  9t  1.Bxc3 Qxe4 2.Rf2 Rd7 3.Re1 Qh4 4.g3 Qg5 5.Qe6
                               Rb7 {-180}
  26441293  3:41.9  -0.69  9.  1.Bxc3 Qxe4 2.Rf2 Rd7 3.Re1 Qh4 4.g3 Qg5 5.Qe6
                               Rb7 {-180}
  31559943  4:26.7  -0.87 10t  1.Bxc3 Qxe4 2.Rf2 d5 3.Qa6 d4 4.Bd2 Qh4 5.Re2
                               Qg4 {HT} {-180}
 134015558 18:41.2  -0.87 10.  1.Bxc3 Qxe4 2.Rf2 d5 3.Qa6 d4 4.Bd2 Qh4 5.Re2
                               Qg4 {HT} {-180}
 148984406 20:49.3  -1.04 11t  1.Bxc3 Qxe4 2.Rf2 d5 3.Qa6 Qg4 4.Rfd2 Rd6 5.h3
                               Qd7 6.Be5 Rxf7 {-260}
 213935781 29:32.8  -1.03 11t+ 1.Rg5 d5 2.exd5 Rxd5 3.Rxd5 Nxd5 4.Qf3 a5
                               5.bxc3 Nxc3+ 6.Bxc3 Qxb3+ 7.cxb3 Bf6
 295123500 41:17.5  -0.93 11t  1.Rg5 d5 2.Bxc3 Qxe4 3.Qxe4 dxe4 4.Bd4 Bb7
                               5.Rb5 Bc8 6.h3 Rd7 7.Re5 Bb7 {-180}
 564220184 1:20:12  -0.92 11t+ 1.Qf1 Nxe4 2.Rh5 Bg5 3.Qf5 d5 4.Rxg5 Nxg5
                               5.Qxg5 Qa3 6.bxa3 Rxf7 {851}
 586940921 1:23:33  -0.72 11t  1.Qf1 Nxe4 2.Rh5 Nf6 3.Rh6 Ng4 4.Re6 Qb7 5.Qe2
                               Ne5 6.Bxc3 {HT} {-180}
 607773594 1:26:33  -0.72 11.  1.Qf1 Nxe4 2.Rh5 Nf6 3.Rh6 Ng4 4.Re6 Qb7 5.Qe2
                               Ne5 6.Bxc3 {HT} {-180}
 670136487 1:35:27  -0.32 12++ 1.Qf1 Nxe4 2.Rh5 Nf6 3.Rh6 Ng4 4.Qf4 Nxh6
                               5.Bxg7+ Kxg7 6.Qxb4 Kh8 7.Qxc3+ Bf6 {51}
 742640039 1:46:15   0.00 12t  1.Qf1 Nxe4 2.Rh5 Nf6 3.Rh6 Qxd4 4.Rxd4 gxh6
                               5.Qe1 Rd7 6.Be6 Rdd8 7.Bb3 Rd7H 8.Be6H Rdd8
                               9.Bb3HR {-109}
1008898395 2:22:25   0.00 12.  1.Qf1 Nxe4 2.Rh5 Nf6 3.Rh6 Qxd4 4.Rxd4 gxh6
                               5.Qe1 Rd7 6.Be6 Rdd8 7.Bb3 Rd7 8.Be6 Rdd8 9.Bb3
                               {-109}
1484194993 3:26:33   0.04 13t  1.Qf1 Nxe4 2.Qf4 cxb2 3.Rh5 Nf6 4.Rh6 Ne4 5.Qf5
                               Ng5 6.Qg4 Be4 7.Rxh7+ Bxh7 8.Bxg7+ {HT} {-680}
Regards,
Dieter



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