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Subject: Re: cute position

Author: Anthony Cozzie

Date: 06:43:43 05/06/04

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On May 06, 2004 at 09:34:23, Uri Blass wrote:

>On May 06, 2004 at 07:44:13, Martin Giepmans wrote:
>
>>On May 05, 2004 at 21:08:48, Will Singleton wrote:
>>
>>>[D]8/8/3Rr3/6Bk/7P/5K1P/8/8 w - - 0 74
>>>
>>>This is from ICC today.  The game is already won, but Bf4 wins quicker.  Amateur
>>>plays it immediately, anybody else? (not Shredder, Ruffian, CM)
>>>
>>>13 1007 149 920346 Bf4 Rxd6 Bxd6 Kxh4 Kg2 Kh5 Be7 Kg6 Kg3 Kh5
>>>14 1007 243 1496827 Bf4 Rxd6 Bxd6 Kxh4 Kg2 Kh5 Be7 Kg6 Kg3 Kh5
>>>15 1048 501 3162742 Bf4 Rxd6 Bxd6 Kxh4 Kg2 Kh5 Kg3 Kg5 Be5 Kf5
>>
>>
>>SpiderChess (without tablebases) also plays it (instantly).
>>I guess that some engines overlook it because of nullmove.
>>
>>Martin
>
>I do not see null move problem.
>It is evaluation problem and movei does not know to trade pieces when it has the
>advantage.
>
>It probably can solve it if I add a bonus in the case that the opponent has only
>a king but this also means that the wrong evaluation of KBP vs K will remain.
>
>Uri

I don't think this is an evaluation problem, but rather a search problem.  Movei
has neither tablebases nor hashtables, so it has trouble.

anthony



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