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Subject: Re: Strength of the engine in chess programs

Author: Rolf Tueschen

Date: 18:16:15 05/21/02

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On May 21, 2002 at 20:26:58, Robert Hyatt wrote:

>Be _very_ careful in reading what I wrote.  I did _not_ say that programs were
>2300 (or 1900 as Phil Innes claimed) without a book.  I simply claimed that the
>books make a difference.

For me nobody knows the _resulting_ Elo numbers. My assumption is a result of
statistical experience and knowledge about performances of groups of intelligent
persons. Just think for a moment of Los Alamos. I take the actual depth of the
best programs and found 2200-2350 a nice mark. I take for granted that everybody
knows that Elo is performance over a period of time in a certain pool. I said
thought experiment.


>And humans that are computer-savvy will take advantage
>of the "no book" information to try to take the computer into a position that
>it doesn't understand very well.  IE David Levy used to beat programs quite
>successfully playing the Goring Gambit (a variation of the Scotch based on
>e4 e5 Nf3 Nc6 d4 exd4 c3 ...)  Black wins a pawn instantly but has to look at
>the white bishop pair for a long time in return.  And a single mistake can
>turn it into a tactical rout by white...

Yes, although these days are gone. The overall depth of a computer would cause
real problems for David Levy! Just if you think a player on his own. But my
experiment said that a whole group of chessplayers studied a completely _new_
chess, the one against computers.

Let me offer a second thought experiment: Let's take players like Kramnik. Just
two or three. If they got enough money, you know what these three could achieve
- as a group? They would dump FRITZ and Co. into a hell of 2300 or below! If
enough money at stake and whatever institutions have stated "We want the real
results, not just draws, we want to see what is possible!" Why 2300? Simply
because for these guys the depth of the actual commercial programs is a moot
argument.

So, let me repeat please. I do not intend to say, your 2500, or the other 2700
is nonsense, no, I want to lead the attention to some important aspects that
normally nobody is talking about. Strength is too often simply a static
construct. But of course it's totally relative. And as a consequence, the
results of today's events are _not_ absolute signals but only statistical
results on the basis of a cluster of factors. We could also say, results are too
often seen as 1-dimensional.


>As far as GM vs computers go, computers are _very_ difficult to beat, even by
>the best GM players.  Yes the GMs are significantly stronger, as I still
>consider normal hardware programs to have just broken into the 2500 territory.
>But while I know that I can probably drag someone that only weighs 175 pounds
>up and down the beach using a rope, I know it will be a _real_ struggle and
>I'm not going to spend a lot of energy with no real reward.  I think the humans
>play with the same sort of semi-determination until real money is at stake.
>Then suddenly they become supermen...

Did you know that you are one of very very few who are thinking about such
factors? Thinking and talking about.


>I think Kramnik will likely show this just like the last match did in a way...
>Although again a 1 point victory is just as good as an 6 point victory and
>consumes far less mental energy.  Some want to look at a 3.5 vs 2.5 result as
>"nearly equal".  It might be.  Or the 3.5 player might have been _far_ stronger
>and simply won the match with the miminum mental effort possible...

Yes, nice differentiations. My weakness is that I see _only_ such variations,
because nothing is just black and white. At the same time I have the unsolved
problem, why chessplayers or chess lovers or computerchess knowies often become
nervous when variations are presented, although chess at the first move already
is a game of more than two stable alternatives...

Science is even broader. :)

Rolf Tueschen



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