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Subject: Re: Are there programs which can win this without tablebases?

Author: Uri Blass

Date: 21:23:06 10/22/05

Go up one level in this thread


On October 22, 2005 at 11:05:21, Günther Simon wrote:

>On October 22, 2005 at 09:34:42, Uri Blass wrote:
>
>>On October 22, 2005 at 08:08:47, Günther Simon wrote:
>>
>>>This position really happened in one of my RWBC games today
>>>and it revealed a bug in a program. 6 men say it is a win.
>>>(Shredder Oracle : M27 with best play)
>>>I am not sure though, if there are programs, which are able
>>>to win this without tablebases at all? (in reasonable time ;)
>>>
>>>Guenther
>>>
>>>[D]4r3/8/8/8/8/6bk/7p/3R3K b - - 0 76
>>
>>I doubt if there are programs that can find it without tablebases at reasonable
>>time because I expect KRB vs KR to be prune based on no threat but
>>Yace with 5 piece tablebases agree with shredder  Oracle
>>
>>New game, 4320'/1
>>4r3/8/8/8/8/6bk/7p/3R3K b - - 0 1
>>
>>Analysis by Yace 0.99.87:
>>
>...
>
>>1...Bf4 2.Rf1 Kg4 3.Rb1 Rc8 4.Rf1 Be3 5.Kxh2 Rd8 6.Kg2 Rd2+ 7.Kh1 Bf2 8.Kg2 Bg3+
>>9.Kg1 Re2 10.Rd1 Bf4 11.Rd3 Be3+ 12.Kf1 Kf3 13.Rd7 Rh2 14.Rf7+ Bf4 15.Rg7 Rc2
>>16.Re7 Rb2 17.Re8
>>  -+  (-#27)   Depth: 22/51   00:29:39  2527052kN
>>
>>(,  22.10.2005)
>>
>>Uri
>
>Thanks for the cpu time Uri. I have one question though, did you
>analyse this with 5 men + Yaces' bitbases or without bitbases?
>(Those would probably speed it up a 'bit')
>
>Guenther

I believe that I have no bitbases but as dieter said they are not very
important.

Uri



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