Author: José Antônio Fabiano Mendes
Date: 09:27:12 12/29/00
Go up one level in this thread
On December 28, 2000 at 15:55:25, Uri Blass wrote:
>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
OK,"faster" and "shorter" are two words that should not be confused,
but if Yace is only using 4-piece tablebases then sometimes it will be able
to find the shortest mate in a 5-piece ending[of course!].That is not the
case here,Yace indeed found the shortest mate,as a matter of fact 6...h2+
is the only winning move.That all I tried to say in my previous post. JAFM
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.