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Subject: Re: Not soluble for computer?

Author: Uri Blass

Date: 10:35:17 03/23/01

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On March 23, 2001 at 12:34:01, Tanya Deborah wrote:

>On March 23, 2001 at 05:32:07, Uri Blass wrote:
>
>>On March 23, 2001 at 01:54:29, Heinz-Josef Schumacher wrote:
>>
>>>The follow study is not soluble for progrms today!?
>>>
>>>5nr1/2Pp2pk/3Pp1p1/4P1P1/6P1/5K2/8/7n w - -
>>>
>>>http://homepages.compuserve.de/hjsxy/2.gif
>>>
>>>M.Judowitsch- Study 1976
>>>
>>>1.c8N!! [1.Kg2? Rh8 2.Kxh1 Kg8+ 3.Kg2 Rh4=).  1...Rh8 2.Ne7 Nf2 3.Kxf2 Rg8 4.Ke3
>>>Kh8 5.Kd4 Kh7 6.Kc5 Kh8 7.Kb6 Kh7 8.Kc7 Rh8 9.Kd8 Rg8 10.Ke8 Rh8 11.Kf7 Rg8
>>>12.Nxg8 Kh8 13.Kxf8 1-0
>>
>>
>>I showed yace the following line
>>1.c8N Kh8 2.Ne7 Nf2 3.Kxf2 Kh7 4.Ke3 Kh8 5.Kd4 Kh7 6.Kc5 Rh8 7.Kb6 Rg8 8.Kc7 Kh8
>>9.Kd8 Nh7+ 10.Nxg8 Kxg8 11.Kxd7 Kf8 12.Kc7 Nxg5 13.d7 Nf7+ 14.d8Q+ Nxd8 15.Kxd8
>>
>>Black's moves were suggested by yace.
>>After it I took the moves back slowly.
>>
>>The result is that Yace shows 1.c8N with a score of +7.46 at depth 25.
>>
>>The main line is 1.c8N Rh8 2.Ne7 Nf2 3.Kxf2 Rg8 4.Ke3 Rh8 5.Ke4 Rg8 6.Kd4 Rh8
>>7.Kc5 Rg8 8.Kb5.
>>
>>Uri
>
>Hi Uri,  But... Which line of play displayed Yace if you do not show the main
>line ? Did it find c8N for himself?

No

I do not believe that it can find it without seeing the solution first but at
least it can understand that the solution is correct.

Uri



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