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Subject: Re: Analysing while retracting moves

Author: Victor Zakharov

Date: 09:27:49 11/22/01

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



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