Author: Dieter Buerssner
Date: 12:24:32 05/05/03
Go up one level in this thread
On May 05, 2003 at 14:31:51, Slobodan R. Stojanovic wrote:
>On May 05, 2003 at 09:40:48, Enrique Irazoqui wrote:
>
>>This is a study that Grigoriev published in 1931 as "white to move and win". I
>>think it is a mate in 28, but I'm not sure. I find the first move and the
>>maneuvre beautiful.
>>
>>8/1p3p2/1p2p3/7p/2P1P3/k6P/6P1/4K3 w - - 0 1
>Yace Paderborn UCI:
[..-]
>D23 06:40 -1,15 e5 Rb4 h4 Rc4: g4 Rd4 gh5: Re5: h6 Rf6 h5 b5 Rd2 e5 Rd3 b6
>Rc3 e4 Rd4 b4
>D24 12:12 -0,69 e5 Rb4 h4 Rc4: g4 Rd4 gh5: Re5: h6 Rf6 h5 b5 Rd2 e5 Rd3 b6
>Rc3 e4 Rd4 b4
>D25 17:52 -0,70 e5 Rb4 h4 Rc4: g4 Rd4 gh5: Re5: h6 Rf6 h5 b5 Rd2 e5 Rd3 b4
>Rc4 e4 Rb4: b5 Rc3 b4 Rb4: e3
>
>Score is not positive, but solution was found.
I had a bit more patience (and possibly a faster computer). I did not use Yace
Paderborn, but a slightly changed version (I don't expect it to make much
difference - it could be even worse). P4, 2.53 GHz, 250 MB hash
8:35.4 -0.48 25++ 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 e5 8.Kd3 b4 9.Kc4 Ke7 10.h7
b3 11.h8=Q b2 12.Qh7 e4 13.Qxe4+ Kd8
11:47.4 -0.13 25t 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 e5 8.Kd3 b4 9.Kc4 e4 10.Kxb4
b5 11.Kc3 e3 12.Kd3 {HT} {-80}
12:41.9 -0.13 25. 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 e5 8.Kd3 b4 9.Kc4 e4 10.Kxb4
b5 11.Kc3 e3 12.Kd3 {HT} {-80}
16:53.8 -0.12 26t 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 e5 8.Kd3 b4 9.Kc4 e4 10.Kxb4
b5 11.Kc3 e3 12.Kd3 e2 13.Kxe2 b4 14.Kd3 b3 {0}
18:43.6 -0.12 26. 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 e5 8.Kd3 b4 9.Kc4 e4 10.Kxb4
b5 11.Kc3 e3 12.Kd3 e2 13.Kxe2 b4 14.Kd3 b3 {0}
19:00.0 -0.52 27-- 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 e5 8.Kd3 b4 9.Kc4 e4 10.Kxb4
b5 11.h7 Kg7 12.Kc5 b4 13.Kd5 b3 14.Kxe4 b2
15.Kd4 b1=Q 16.h6+ Kxh6 17.h8=Q+ Qh7 {-80}
25:10.1 -0.62 27t 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 b4 8.Kc2 e5 9.Kb3 e4 10.Kxb4
e3 {HT} {-80}
29:38.6 -0.62 27. 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 b4 8.Kc2 e5 9.Kb3 e4 10.Kxb4
e3 {HT} {-80}
46:00.0 -0.22 28++ 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 b4 8.Kc2 e5 9.Kb3 e4 10.Kxb4
Ke6 11.Kc4 e3 12.h7 e2 13.h8=Q e1=R
1:02:57 0.78 28++ 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 b4 8.Kc2 e5 9.Kb3 e4 10.Kxb4
Ke6 11.h7 e3 12.h8=Q b5
1:13:23 0.93 28t 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 b4 8.Kc2 e5 9.Kb3 e4 10.Kxb4
e3 11.Kc3 b5 12.Kd3 b4 13.Kxe3 b3 14.Kd3 {HT}
{0}
1:18:21 0.93 28. 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 b4 8.Kc2 e5 9.Kb3 e4 10.Kxb4
e3 11.Kc3 b5 12.Kd3 b4 13.Kxe3 b3 14.Kd3 {0}
1:32:55 1.33 29++ 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 b4 8.Kc2 e5 9.Kb3 e4 10.Kxb4
e3 11.Kc3 Kf5 12.Kd3 Kf4 13.h7 Ke5 14.h8=Q+ Kf5
1:44:22 2.33 29++ 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 b4 8.Kc2 e5 9.Kb3 Ke6 10.Kxb4
Kf6 11.Kb5 b6 12.Kb4 b5 13.Kxb5 e4 14.Kc4 Ke7
15.h7 Kf8 16.h8=N {260}
2:00:11 4.23 29t 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 b6 8.Kc2 b4 9.Kb3 e5 10.Kxb4
e4 11.Kc3 b5 12.Kd4 e3 13.Kxe3 b4 14.Kd3 b3
15.h7 {HT} {0}
2:10:26 4.23 29. 1.e5 Kb4 2.h4 Kxc4 3.g4 Kd4 4.gxh5 Kxe5 5.h6
Kf6 6.h5 b5 7.Kd2 b6 8.Kc2 b4 9.Kb3 e5 10.Kxb4
e4 11.Kc3 b5 12.Kd4 e3 13.Kxe3 b4 14.Kd3 b3
15.h7 {HT} {0}
It took over 1 hour, to get positive score, but at least, the score rose to a
rather convincing value.
Regards,
Dieter
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