Author: Uri Blass
Date: 11:41:54 12/28/00
Go up one level in this thread
On December 28, 2000 at 10:36:57, Dieter Buerssner wrote:
>On December 28, 2000 at 08:44:25, Vincent Diepeveen wrote:
>
>>>>R7/8/6k1/4n3/7p/5P2/5r1p/7K b - -
>
>>Oh well DIEP first 13 plies is a victim of its greedyness and
>>captures with Nxf3, but then at 11 ply it gets a fail high to
>>several moves to start with Kf6 then h3 but it remains keeping Nxf3
>>for a while. After a few minutes it gives Kf5 mate in 30 however and
>>that was the end of the nxf3 suffering :)
>>
>>Can be however that the mate depth is not accurate. Have some
>>bugs there recently perhaps.
>
>It seems mate in (at least) 30 is correct. I get:
>
>
> 205922704 1351.9 Mat30 16t 1...Kf5 2.Ra4 Rxf3 3.Kxh2 Ng4+ 4.Kg2 Rf2+ 5.Kg1
> h3 6.Rxg4 h2+ 7.Kxf2 {EGTB} 7...h1=Q! 8.Rd4!
> Ke5! 9.Rd3! Qc1 10.Ke2! Ke4! 11.Rg3! Qc2+!
> 12.Ke1! Qc5! 13.Ke2! Qh5+! 14.Kf2! Qh2+! 15.Rg2!
> Qf4+! 16.Kg1! Ke3! 17.Rb2! Qe4 18.Rb3+! Ke2!
> 19.Rg3! Qd5! 20.Rg6! Qd4+! 21.Kh2! Qf4+! 22.Kg1!
> Kf3! 23.Rg2! Qh4! 24.Rg8! Qd4+ 25.Kh2! Qe5+!
> 26.Kh1 Qa1+! 27.Kh2! Qa2+! 28.Kg1! Qxg8+!
> 29.Kf1! Qg5 30.Ke1 Qc1#! {1001}
>
>-- Dieter
Which tablebases did you use?
It seems that you used only the 4 piece tablebases because the EGTB is only in
position with 4 pieces.
I guess that with the KRP vs KR tablebases you could find the mate faster.
Uri
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