Author: Uri Blass
Date: 12:55:25 12/28/00
Go up one level in this thread
On December 28, 2000 at 15:28:56, José Antônio Fabiano Mendes wrote:
>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
> http://chess.liveonthenet.com/chess/endings/
I did not say that there is a faster mate than 6...h2+ but only that yace could
find the mate in less time(this is what I meant when I used the words find the
mate faster).
Uri
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