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Subject: Re: CraftyK7 18.12 Updated

Author: Robert Hyatt

Date: 08:01:27 10/19/01

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On October 19, 2001 at 07:00:01, Aaron Gordon wrote:

>Alright, I think this is the 3rd time Hyatt updated the source and this last
>time it seems to be a tad stronger.. Doing some testing on this 1.61GHz Tbird w/
>CraftyK7 18.12 vs a 1GHz Duron & Gambit Tiger 2, so far Crafty has been doing
>quite well...  You can get the new revision at
>ftp://65.10.79.9/pub/crafty/c1812-k7.zip
>
>If you can please let me know how strong you think this is in relation to the
>previous versions of Crafty.


I'm also interested.  It has three major changes:

1.  Deep Blue search extension bound, two consecutive plies can't extend more
than 2 plies, rather than any single ply being limited to extending 1 ply.

2.  New EvaluateWinner() endgame module that does a better job (certainly not
perfect yet) of assessing whether a game is a draw, can be won by white or
black, or by both.

3.  More stability in the endgame search.

Whether it is stronger or not is a real question.  items 2 and 3 are definitely
better than before.  Item 1 is a question at the moment.  It also seems better,
but more data is needed.



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