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Subject: Re: Doctor? 3.0

Author: blass uri

Date: 01:17:44 01/20/00

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On January 19, 2000 at 15:49:55, Marek Soszynski wrote:

>The following was posted to the Polish-language newsgroup pl.rec.gry.szachy
>(18/Jan/2000) by Darius Dlugopolski. I translate it here, without comment, for a
>wider audience.
>
>"I'd like to reveal to all correspondence chess players the secret of the best
>analysis module. You probably won't believe it, but it's... Doctor? 3.0, which
>forms part of the Fritz 5 (or 6) setup. A close acquaintance of mine (a
>contestant in the Polish Correspondence Chess Championship currently taking
>place) has the majority of the best chess programs at present (Fritz, Rebel,
>Hiarcs, ChessMaster). These programs of course make light work of Doctor? at
>normal time limits; in analysing positions they are better too. However, the
>situation seems to change when positions are set up for a minimum of 24 hours -
>it's that kind of time my friend uses, and he claims that at such durations
>Doctor? has no equals."

I am interested to see the positions when only doctor can find the right move.

I started to test doctor3 in hard combinations for programs when usually
programs cannot find the right move at tournament time control(they may need an
hour or some hours) and I did not find that doctor3 is better in solving these
positions.

Here is one example:

[D] 3r1b1k/pp6/2n2q1p/2Bp1B1Q/5P2/1P4p1/P7/4R1K1 w - - 0 1


Doctor3 could not find Re6 after more than 1 hour of search on pentiumIII450

Uri



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