Author: Koundinya Veluri
Date: 21:04:35 09/26/01
Go up one level in this thread
On September 26, 2001 at 23:07:15, Dieter Buerssner wrote:
>On September 25, 2001 at 22:56:30, Koundinya Veluri wrote:
>
>>Here's a good one I just found today in Franks's little test tournamet:
>
>I agree - very interesting position
>
>>Leila - King of Kings
>>
>>6B1/1pp3p1/3p4/n1k2P2/2P3P1/4K3/8/8 b - - 0 40
>>
>>I think black already lost here, but it takes a very long time for a program to
>>know this without good "passed pawn unstoppable" or "strong advanced connected
>>passed pawns" knowledge.
>
>I am not sure, what you mean by "very long time". I have a rather slow computer
>(K6-2 475). It takes Yace less than 20 seconds, to see the critical fail low. On
>more current hardware, this time should be around 5 seconds, and Yace should be
>able to avoid Nxc4+ at Blitz time control.
I guess this illustrates the huge difference between the top programs and
amateur ones :). I didn't actually test the position much before posting it. I
was intending for it to be used for static evaluation to improve pawn eval, but
it turned out to be a pretty good test for amateur engines. Mine fails low
initially around 5 min, then at 18 min, but it doesn't replace it even after 30
min, but I've found a problem in my passed pawn eval that is causing the
slowdown. Soon to be fixed... :)
Koundinya
>
> 2938185 13.815 2.23 12. 40...Nxc4+ 41.Bxc4 Kxc4 42.Kf4 Kd5 43.Kg5 c5
> 44.Kg6 c4 45.Kxg7 c3 46.f6 c2 47.f7 c1=Q
> 48.f8=Q Qg5+ 49.Kh7 Qxg4 {160}
> 3888266 17.969 1.83 13-- 40...Nxc4+ 41.Bxc4 Kxc4 42.Kf4 Kd5 43.g5 g6
> 44.Kg4 c5 45.fxg6 Ke6 46.Kh5 d5 47.Kh6 b6 48.g7
> Kf7 49.Kh7 Ke7 {80}
> 4363321 20.175 0.83 13-- 40...Nxc4+ 41.Bxc4 Kxc4 42.Kf4 Kd5 43.g5 b5
> 44.g6 c5 45.f6 c4 46.f7 c3 47.f8=Q c2 48.Qxg7
> c1=Q+ 49.Kf5 {80}
> 10033081 48.782 -2.83 13t 40...Nxc4+ 41.Bxc4 d5 42.g5 Kd6 43.f6 gxf6
> 44.g6 Ke7 45.Bxd5 Kf8 46.Bxb7 Kg7 47.Be4 c5
> {HT} {-270}
> 10295474 49.834 -2.82 13t+ 40...b6 41.g5 d5 42.cxd5
> 11780893 57.144 0.23 13t 40...b6 41.g5 Nc6 42.f6 gxf6 43.gxf6 Ne5 44.Be6
> b5 45.cxb5 Kxb5 46.f7 Nxf7 47.Bxf7 c5 48.Bd5H
> {-190}
> 12344171 59.910 0.24 13t+ 40...Nc6 41.g5 b5 42.cxb5 Kxb5 43.Kf4
> 14511053 1:10.5 0.30 13t 40...Nc6 41.g5 Nd4 42.f6 gxf6 43.gxf6 c6 44.f7H
> Ne6H 45.Kf3H {HT}
> 16829387 1:22.2 0.30 13. 40...Nc6 41.g5 Nd4 42.f6 gxf6 43.gxf6 c6 44.f7
> Ne6 45.Kf3
>
>Regards,
>Dieter
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