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Subject: Re: Aristarch 4.4

Author: Uri Blass

Date: 03:07:13 08/10/02

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On August 10, 2002 at 04:46:04, Mogens Larsen wrote:

>On August 10, 2002 at 03:48:29, Kurt Utzinger wrote:
>
>>I agree with this statement but nevertheless have the feeling that Aristarch 4.4
>>and List 4.61 could be the first amateur engines that get more than the usual
>>30-35 % against the best commercial programs. This does not necessarly mean that
>>they can easily win all matches against other strong amateurs like Crafty 17.14,
>>Little Goliath 2000 v3.7, Yace 0.99.56, Tao 5.4, Pepito v1.55 and so on.
>
>I don't dispute that impression or the likelihood of Aristarch performing
>according to the most optimistic expectations. However, I would like to see some
>solid evidence. There's a tendency to overevaluate new strong engines, eg.
>"engine X beats the pants of everything om my comp". Behaviour that's not always
>reproducable. I would be a very happy puppy if an amateur engine was capable of
>scoring more than 40% against your average recent commercial engine (on more
>than one computer). It's good to have new candidates.
>
>>By the way, in the Match Aristarch 4.4 vs Nimzo 7.32 (40'/40) it stands 1-1 but
>>in the running third game, Aristarch 4.4 is already a pawn up.
>
>I'm running a little match against Pepito (also 40/40'). Mainly to test my new
>Pepito book. So far Pepito is leading 3-1 with an advantage for Aristarch in the
>fifth game. The progress of Pepito is definately due to my opening book *cough*.
>
>Regards,
>Mogens

How do you build opening books for chess programs?

Based on result that I see with movei I may consider to replace the small
opening book of movei that I built manually with a book that it's only target is
to get the opponent out of book.

I may consider having a lot of lines like 1.a3 1.c3 1.d3 1.e3 1.h4 or
1.e4 a6 in my next book.

Uri



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