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Subject: Re: inaccuracy of numerical score of (top) engines

Author: jefkaan

Date: 09:12:51 10/30/03

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On October 30, 2003 at 11:35:05, Robert Hyatt wrote:


On October 30, 2003 at 11:35:05, Robert Hyatt wrote:

>Comparing scores between two engines is just like comparing search
>depths, or anything else.

hello mr Hyatt, well thx for your reply,
but actually i meant at the *same* (or similar)
search depth, or similar time controls/cpu strength;
at higher depths, the score of one engine usually
seems to 'converge' (although this usually is an illusion
as the search  after 14 ply or so  seems to go 'slower' ..)

So what i really meant was: how big can be the
differences in positional evaluations between
different top-engines ? And the reason i mention
the letter t*o*p* is because otherwise an imbalanced
evaluation can cause rating points (and ofcourse forget
the scaling factors, in the end things come down to material
evaluations like a queen is approx 8 pawns and in the end
mate=mate). Remember the program Mchess (version 7. was quite
good, interesting opening book, human style of play etc.) ?
When looking at this program I've really seen some differences
with other engines more than 1.5 pawn value,  but in the
end after proper analysis Mchess usually wasnt right
(Crafty on the other hand could still benefit from
some more emphasis on positional
vs material evaluation i suspect)

best regards,
jef




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