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Subject: Re: About diminishing returns (Uri)

Author: Uri Blass

Date: 00:45:35 11/23/01

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On November 22, 2001 at 22:50:31, Robert Hyatt wrote:

>On November 22, 2001 at 21:26:37, Dan Andersson wrote:
>
>>>It is anectodal from the perspective I gave...  namely that of playing
>>>A vs A (different depths) to extrapolate how A does at increasing depths
>>>against _anybody_.
>>>
>>I have to agree, but in its own context it would be called substantiated. The
>>context or contexts of the different points of your posting was, IMO ambiguous.
>>That's why i posted the factoid in return. I hope someone with more time in hand
>>makes a similar test, in regards to accuracy and reliability. Many obstacles to
>>generalisation to A B matches when A neq B exist. The internal definition of ply
>>is one. Different extensions strategies is another. Bugs that occur rarely but
>>wastes good play, or are a function of depth being a prime or generally a
>>function of depth ... etc. It might even be that diminished returns between two
>>different programs is dependent on too many factors to be measured reliably. One
>>criterion that ought to be fulfilled before trying to find diminishing returns
>>between two different programs. One that needs to be there, is that both
>>programs show diminishing return in self play testing. I cannot give a valid
>>reason right now. But I have a hunch that it might be an almost necessary
>>prerequisite. Any thoughts?
>>
>>MvH Dan Andersson
>
>
>Something tells me that for A vs A, there _must_ be a diminishing return,
>because all that changes is the depth.  But in A vs B, the search depth is just
>one difference between the two players.
>
>I _always_ find positions where another ply (or another N plies) would find
>the right move...

I do not understand why do you think that in A vs A there must be a diminishing
returns.

Is it the situation in all the other games?

Uri



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