Author: José Antônio Fabiano Mendes
Date: 12:28:56 12/28/00
Go up one level in this thread
On December 28, 2000 at 14:41:54, Uri Blass wrote:
>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
6...h2+ is the optimal move,there is no faster mate. JAFM
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