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Subject: Re: SSDF(Chess Tiger 15 - Ruffian 1.0.1)A1200, 1.5-2.5, now 20.5-16.5

Author: Uri Blass

Date: 07:11:35 12/27/02

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On December 27, 2002 at 09:42:53, Mogens Larsen wrote:

>On December 26, 2002 at 10:39:21, Uri Blass wrote:
>
>>Is there an evidence that Ruffian has an inferior book?
>
>No, I don't think there is any evidence available. But I would be rather
>surprised if an autogenerated book made from less than 25000 games is of the
>same quality as one made by a professional. Even if the most rare continuations
>are weeded out. One might even argue that following the most common variations
>is dangerous, because they should be well-prepared.
>
>Another point is the disabling of learning when used as an UCI engine, albeit
>the effect of the book learning isn't documented and any advantage might be
>insignificant. I don't know the quality of the Tiger book (+learning), so the
>ELO disadvantage is hard to estimate. Probably not Kure class, so between 20 and
>40 ELO points as a inaccurate guess.
>
>>Did people analyze the game to find if Tiger got better positions from the
>>opening?
>
>The ones I've seen, which is only a few of the first games, didn't look
>horrendous for Ruffian. Unfortunately, you can't tell when Ruffian exited the
>book, ie. if the silly moves are from book or made on its own.
>
>Regards,
>Mogens

Ruffian is free and public.

How is it possible that you cannot find when Ruffian left book?

I understand if you cannot find directly from the pgn but I believe that you can
find it by replaying the games.

Uri



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