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Subject: Re: Fritz Has A New Weapon

Author: Graham Laight

Date: 03:06:53 08/31/00

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On August 30, 2000 at 06:30:23, Alexander Kure wrote:

>On August 29, 2000 at 23:19:59, Robert Hyatt wrote:
>
>>On August 29, 2000 at 19:18:17, Alexander Kure wrote:
>>
>>>On August 29, 2000 at 13:58:52, Graham Laight wrote:
>>>
>>>>Firstly, apologies to everyone for dashing off after the last game in the WMCCC.
>>>>
>>>>It enabled me to get an extra day's holiday with my girlfriend, though, which
>>>>was well worthwhile!
>>>>
>>>
>>>Well deserved, Graham!
>>>Thanks again for your work.
>>>
>>>[...]
>>>
>>>This game clearly showed that Fritz plays in a different league than Crafty! In
>>>fact I think this was one of the best games of the WMCCC.
>>>
>>>Greetings
>>>Alex
>>
>>
>>My take on this game is a bit different.  I do _not_ want my program to make
>>such a sacrifice and then see the eval steadily go _down_ over the next few
>>moves.  It means one of two things for it to win such a game:
>>
>>1.  The eval is bogus.  It is saying "this is bad" when in reality "this is
>>good".  I don't want that sort of evaluation.
>>
>>2.  The program was lucky.  A little luck doesn't hurt.  But it doesn't win
>>tournaments very often.
>>
>>Either the eval was wrong, or it was lucky.  Neither one leave me feeling like
>>"fritz is in a different league than Crafty..."
>>
>>I suspect white has better moves that might have justified the pessimistic eval
>>Fritz had...  The right program might have made that sacrifice look as ugly as
>>this game made it look brilliant...
>
>Hi Bob,
>
>When Graham said that Fritz's evaluation was steadily going down he meant that
>it was steadily increasing on the negative score thus going up for Fritz, as
>Fritz had black and the evaluation is always shown from white's point of view.

Unfortunately, I have to disagree.

As I remember it, immediately after the sac, Fritz scored itself as being
positive. Then, after a few moves, its eval went down to 0, and stayed there for
quite a while (Crafty was still scoring itself as quite positive - between 1 and
2 points).

Eventually, of course, it came back up again and Fritz won the game.

By the way, I will try to obtain Crafty's logs for tomorrow. The time setting
was 60/115/sd/25 - which means 60 moves in 115 minutes followed by game in 25
minutes (the actual clock time was 60 moves in 2 hours and then complete the
game in 30 minutes).

-g

>Greetings
>Alex



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