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Subject: Re: Ply Depth in relation to Elo again...

Author: Robert Hyatt

Date: 15:14:33 05/24/00

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On May 24, 2000 at 16:00:26, Peter Kappler wrote:

>On May 24, 2000 at 09:14:51, Robert Hyatt wrote:
>
>>On May 24, 2000 at 02:25:40, Peter Kappler wrote:
>>
>>>On May 24, 2000 at 00:17:35, Robert Hyatt wrote:
>>>
>>>>
>>>>The problem is that the only "old" evidence was self-play with varied depth.
>>>>Which is probably not a good test, since small changes are often magnified in
>>>>self-test play, while at other times small changes have no effect at all.
>>>>
>>>
>>>This part confuses me.  Why would self-play be inferior to a test suite?  I
>>>don't understand what you mean by "small-changes" above...
>>
>>
>>The problem is this:  If you add one small piece of information to one program,
>>and that is the _only_ difference in the two programs, then you will see that
>>piece of information influence the games _frequently_.  Because one uses it
>>and the other has no idea about it.
>>
>
>But that's exactly the point of the experiment - to isolate and measure the
>difference in playing strength from ply n to n+1.
>
>--Peter

For a single program.  yes.  But does it translate to another program?  No
more than you can compare my N plies to someone else's M plies, in the same
way.  I don't see anything that says one program gets better quicker (or
less quickly) than another as depth is increased (or decreased).  That is very
hard to measure.



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