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Subject: Re: Mate in 28?

Author: Joachim Rang

Date: 09:26:49 05/06/03

Go up one level in this thread

On May 05, 2003 at 16:04:21, Richard Pijl 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.
>>
>>[d]8/1p3p2/1p2p3/7p/2P1P3/k6P/6P1/4K3 w - - 0 1
>>
>>Grigoriev,N - Study
>>Mate in 28?, 1931
>>[El País, 3-5-2003]
>>
>>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 Kg5 15.h7 b2 16.Kc2 b1Q+
>>17.Kxb1 Kxh5 18.h8Q+ Kg5 19.Qg7+ Kf5 20.Qxf7+ Ke4 21.Qe6+ Kf3 22.Qf5+ Ke3 23.Kc2
>>Kd4 24.Qe6 Kc5 25.Kc3 Kb5 26.Qd6 Ka5 27.Kc4 Ka4 28.Qb4# 1-0
>>
>>Enrique
>
>The Latest Baron (single CPU) version sees e5 within a second and shows a
>positive score in 3 seconds (AMD 2000+):
>

I think you either have a bug or should change your evaluation. It is a highly
conctructed problem and black looses only because of the annoying pawn at f6 and
because he get into zugzwang. Usually such a position as above are won for black
very easy.

• Re: Mate in 28? Richard Pijl 10:26:35 05/06/03
  • Re: Mate in 28? Joachim Rang 13:58:13 05/06/03
    • Re: Mate in 28? Uri Blass 14:13:54 05/06/03
      • Re: Mate in 28? Richard Pijl 15:35:44 05/06/03
        • Re: Mate in 28? Andreas Stabel 00:21:10 05/08/03

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