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Subject: Re: Computer Correspondence Chess Challenge

Author: Dann Corbit

Date: 16:26:50 03/31/00

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On March 31, 2000 at 19:21:12, blass uri wrote:
>On March 31, 2000 at 15:40:29, Dann Corbit wrote:
>>On March 31, 2000 at 15:24:30, Stephen Ham wrote:
>>
>>>Dear Dan and Uri,
>>>
>>>Thanks for the valuable input. This is good iformation and I appreciate your
>>>kind help.
>>>
>>>I guess, in my ignorance, I didn't believe there'd be much difference between 16
>>>ply and 17 ply. But since you gentlemen think that the difference is
>>>substantial, then we'll continue without having the chess engines reveal their
>>>2nd and 3rd choices.
>>
>>There is (according to two studies) about a 15% chance that a computer program
>>will make a better choice by going one ply deeper.  It is possible that by the
>>time we are out to 16 plies, the percentage is less than that, but it would
>>certainly be tangible.
>
>There is about 15% chance that it is going to do a different choice and not a
>better choice.
>
>The different choice is more times a better choice than a worse choice but
>is not always a better choice.

That is an excellent point!  I had not thought it through before, but it is
obvious that you are right.



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