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Subject: Re: On the Harry Schnapp book - intended primarily to Dieter Eberle

Author: Uri Blass

Date: 10:05:25 02/21/06

Go up one level in this thread


On February 21, 2006 at 12:44:39, GŁnther Simon wrote:

>On February 21, 2006 at 12:10:27, Uri Blass wrote:
>
>>On February 21, 2006 at 12:04:05, GŁnther Simon wrote:
>>
>>>On February 21, 2006 at 11:19:27, Uri Blass wrote:
>>>
>>>>On February 21, 2006 at 01:30:34, Gabor Szots wrote:
>>>>
>>>>>On February 20, 2006 at 16:19:48, Dieter Eberle wrote:
>>>>>
>>>>>>Hi Gabor,
>>>>>>none of the lines you posted is bad. They may not be played every day by
>>>>>>Kasparov but if you check them with a strong engine like Rybka beta13b you will
>>>>>>find out that the maximal deviation from zero is far below +/- 1, a good result
>>>>>>for a general book in my opinion.
>>>>>>Astonished, Dieter
>>>>>
>>>>>Hi Dieter,
>>>>>
>>>>>I submitted all games with the HS book. I did not claim all the lines were bad.
>>>>>I said the were bizarre. Most of them is too passive to be good. If an engine
>>>>>comes out of the opening with -0.65 (as was the case in Spike vs. Pro Deo) it
>>>>>will probably lose against an opponent of its own caliber.
>>>>>
>>>>>GŠbor
>>>>
>>>>I do not agree with it.
>>>>
>>>>-0.65 is not a good predictor of result in the opening.
>>>>
>>>>take the following position from the noomen match
>>>>
>>>>r2q1rk1/3nppbp/b2p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQ1RK1 w - - 0 11
>>>>
>>>>Glaurung say 0.65 pawns for white after a minute of search
>>>>
>>>>
>>>
>>>...snip... AFAIK we speak about -0.65 for _White_! after book end
>>>and that is quite different and IMHO already downhill.
>>>
>>>Guenther
>>
>>I do not see the difference.
>>
>>If +0.65 for white can happen when white is not better then +0.65 for black also
>>can happen when black is not better.
>>
>>Uri
>
>
>Uri are you joking? Of course evals are not evenly distributed for
>the colours, as White has an advantage for the first move, which
>is even exaggerated by the evals of chess programs.

Based on the match between 2 versions of Movei black won both games inspite of
0.65 pawns advantage by glaurung for white when Movei was even more optimistic.

My point is that 0.65 pawns advantage can be clearly misleading regardless of
the question which side get it.

I see no reason to assume that -0.65 for white means that
white will probably lose against an opponent of its own caliber otherwise +0.65
for white means that white probably wins against an opponent of its own caliber.

Uri



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