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Subject: Re: Starting position to 30 ply

Author: Uri Blass

Date: 10:41:45 06/04/01

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On June 04, 2001 at 13:09:42, José Carlos wrote:

>On June 04, 2001 at 10:12:36, Christophe Theron wrote:
>
>>On June 04, 2001 at 05:29:47, José Carlos wrote:
>
>[snip]
>
>>>  I think you misunderstood him. He said 'material only', which means that the
>>>program choses the first move it generates and sticks to it unless it sees it's
>>>losing material. 'h3' is just a move that doesn't lose material in 30 plies.
>>>There are a lot of others, but the program doesn't mind, since he thinks they
>>>all are worth the same.
>>>
>>>  José C.
>>
>>
>>
>>The fact that h3 was not losing material after 30 plies was not obvious, at
>>least to me.
>
>  I didn't say the opposite. I simply didn't catch his joke, and tried to
>explain why the program gives a move like h3 when doing material only.
>
>>As someone else said, a tool like this one could be useful to improve opening
>>theory by computing exactly which opening lines could lead to forced loss of
>>material.
>>
>>
>>
>>    Christophe
>
>  I agree, but Rudolf said it only works in the starting position, not in
>midgame positions, so I think when you start moving pieces, the tree will get
>bigger and it will be impossible to perform such a deep search.
>  Anyway, the test is interesting. No doubt. The question is 'how better (if
>any) is material only at d30 compared to a good eval at d15?'. Probably some
>people (Vincent?) would prefer good eval at d15.

I think that everyone is going to prefer good evaluation at depth 15
and not only material evaluation at depth 30.

I will say more than it.
I believe that Sos with normal evaluation at depth X
is going to beat Sos with only material evaluation at depth 2X
for every X except maybe for X=1,2,3.

1.h3 moves cannot work.

Rodulf can try it for small X.

Uri



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