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Subject: Re: thinking on opponent's time

Author: Robert Hyatt

Date: 07:19:27 02/12/99

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On February 12, 1999 at 02:27:13, David Blackman wrote:

>On February 12, 1999 at 01:13:44, Stuart Cracraft wrote:
>
>>Fellow Chesspians,
>>
>>I am curious what your result was in implementing
>>thinking on opponent's time in your programs.
>>
>>Any comments on what you saw in terms of performance/strength
>>as a result of, if any, would be helpful.
>>
>>For example, how often did it guess the opponent's move?
>
>About 50% for any reasonable opponent.
>
>>How much "free" time did it get with this feature?
>
>I guess it's about an extra 50%. More if you have to operate
>the program by hand against a human opponent.
>
>>How much more strongly, if at all, do you think it played?
>
>Objectively, not a lot. Better i think, but not really
>enough difference to notice much. But against a human opponent
>it has a great practical advantage. Making reasonably good
>moves instantly reduces the opponents thinking time and
>"upsets their rhythm".
>

it has a definite strength advantage.  Because if you predict well, and
50% of your moves are 'zero time moves' then the program has become 2x
faster, because it gets twice as long to search.  And 2x is a measurable
speed increase...




>>Thanks,
>>
>>--Stuart
>>
>>P.S. Yes, I have already implemented it. No, I have not tested it
>>in practical play against others.



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