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Subject: Re: The opening book is extreamly important for a chess engine.....Jorge

Author: Anthony Cozzie

Date: 07:55:46 09/22/04

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On September 22, 2004 at 08:40:00, martin fierz wrote:

>On September 22, 2004 at 07:53:38, Drexel,Michael wrote:
>
>>On September 22, 2004 at 06:56:45, martin fierz wrote:
>>
>>>[snip]
>>>
>>>>>it's definitely not nonsense. i agree that the engine won't find a better (or
>>>>>the best according to the book), but a weak engine will make real blunders in
>>>>>the opening while a strong engine might just play a slightly inferior move.
>>>>
>>>>Strong engines don´t just play slightly inferior moves in the opening.
>>>>They play often complete nonsense without book.
>>>>I think we have discussed enough examples here in the past.
>>>
>>>of course - but you are guilty of selective perception.
>>
>>I´m not guilty of anything.
>>I was referring to:
>>"If the engine is strong enough to find better moves by itself then opening book
>>is not needed".
>>Engines generally won´t find better moves by itself than Top GMs in home
>>preparation. No matter how strong they get.
>>The opening book is needed as long as engines have no clue about long term
>>strategies.
>>Some simple development rules are not enough since there exist by far too many
>>exceptions.
>>
>>you have noted the
>>>examples discussed here. if you took 1000 opening positions from somewhere, and
>>>looked which moves GMs play, i believe that strong engines would play the same
>>>moves very often (ie. 80-95%). weak engines on the other hand...
>>
>>I also played 80-95% GM moves in the past.
>>Unfortunately the 5-20% "non-GM moves" made the difference.
>
>duh! your 5-20% are probably real blunders. top engines will not play serious
>blunders that often...
>
>cheers
>  martin

Kurt Utzinger did a test of some strong commercial engines without book a while
back.  The results were pretty ugly if I remember correctly :(

anthony



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