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Subject: Re: Analysing while retracting moves

Author: Uri Blass

Date: 09:55:13 11/22/01

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On November 22, 2001 at 12:27:49, Victor Zakharov wrote:

>>When you say "smartly", is this only something that a human can do?  If not, why
>>doesn't the program itself "step into" its mainline and then retract?  Is it
>>because of time issues?  Or because it doesn't give a benefit often enough?
>
>CA 5.1, CA 6.* versions include automatization of this method named interactive
>analysis. Experience of it's using shows that automatical method is able to
>produce good results. But usualy it takes much more time as compared with human
>controlled analysis. There are some rules to increase or to decrease analysis
>time depending of evaluations chaging. But it can't be compared with human
>control. Anyway methods will be improved in future.
>
>Different engines have different productivity of learning. Best are the Tiger
>and Hiarcs for my observation. Fritz (5,6) and Crafty practically are useless
>here. However I didn't try a lot of them.
>
>>I'm just a bit puzzled as to why "computer + human" can be better than just
>>"computer", especially if we're not assuming the human has any great chess
>>playing ability.
>
>Once again smart using of programs with knowing program strong features and
>their lacks can give amazing results. My friend with ELO below 2200 easily
>crushes his opponents with greater ELO and with the similar hardware/software
>using programs smartly. Here is a few his rules I learnt: try different
>programs; try different methods of analysis; don't use long analysis time -


I disagree with the rule not to use long analysis.
Using long analysis time can be productive for finding good moves that you
cannot find without it.


>mostly it is waste of time; always continue the variations supposed by programs
>(even if analysis time was long)

I believe that it is a good rule to try in many  cases only in corresponence
games.

 - programs can easily change it's evaluation
>from plus to minus after a few moves; learn the program - try different
>variations and return back; learn yourself with the results and try your own
>moves - nothing bad if program rejects them quickly - once you will offer a good
>move that no one program can find.
>
>Victor

what is the time control that your friend is playing?
If you talk about correspondence games so I suspect that the main reason that he
is winning is using more computer time than the opponents.

Uri



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