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Subject: Re: Fritz endgame CD

Author: blass uri

Date: 03:25:51 03/25/99

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On March 25, 1999 at 06:02:56, Dave Gomboc wrote:

>On March 25, 1999 at 00:19:38, blass uri wrote:
>
>[snip]
>
>>Here are some wrong assumptions that explain errors for my Fritz5(16 bit):
>>
>>assumption 1:KRP vs KR cannot be a win for the weaker side.(There is no problem
>>of this assumption for KQP vs KQ)
>>assumption 2:KQ vs KRP cannot be a win for the weaker side.
>>assumption 3:KQX vs KQ when X is not a pawn is a draw unless X is a rook.
>>assumption 4:KQR vs KQ cannot be a win for the weaker side.
>>
>>Uri
>
>Regarding KQP vs KQ:
>
>White: Kh6, Qc7, Ph7
>Black: Kg4, Qa6 (to play)
I guess that you mean Qb5 and the tablebases show the mate.

>1...Qg5# would win for the "weaker" side.
>
>If they only probe the tablebases at the root of the tree, I can imagine your
>suggestion of doing a short search before and after working.  If they probe
>within the search like Crafty does, the overhead might be too significant.

They only probe at the root

Uri




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