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Subject: Re: Program comparison

Author: Shaun Brewer

Date: 09:11:46 03/03/99

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On March 03, 1999 at 11:14:24, Harald Faber wrote:

>On March 03, 1999 at 10:06:33, Shaun Brewer wrote:
>
>>I have been experimenting with openings and therefore played many games
>>attempting to determine if a certain book is better or not. As my PC is needed
>>for other tasks I have to interrupt the games and start again I then amalgamate
>>the results of several batches of games in an attempt to get something
>>statistically relevant.
>>
>>Here are the example scores for one such set of batches, all played on the same
>>machine using the same program with books a and b constant for all batches.
>>
>>a      b
>>26   -  35
>> 9.5 -  6.5
>> 7   - 15
>>58.5 - 54.5
>>39.5 - 45.5
>>
>>I am rapidly coming to the conclusion that hundreds of games would be required
>>to be able to state that a is better than b, and this would also apply to
>>program v program tests.
>
>In 2/5 a scores better so you suppose a to be better than b??

Sorry, I was not careful with my wording, in the example b is better than a when
the results are amalgamated. In my conclusion I was not specifically
referring to the example and should have perhaps said x is better than y to
avoid the confusion.

>
>>What level of confidence can be attached to computer tournaments that the winner
>>is the best?
>
>Define "best" and you get the answer.

Probably the most that can be hoped for is strongest in terms of the field of
opponents.

>
>>Is it true that computer v computer results vary more than human v human
>>results?
>
>Talking of strong humans I'd say yes because the humans know what they play,
>they play the same positions again and again so they get used to them.
>Programs often have a wide opening book that leads them to positions they don't
>understand. So the results are more chance than in humans play.




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