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Subject: Re: crafty vs virtualchess2 (round 6)

Author: Robert Hyatt

Date: 19:43:12 10/30/97

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On October 30, 1997 at 20:20:41, jeff wrote:

>This game has an interesting position after 36...Kf8.
>Here crafty played 37. Bf1 which really strikes me as just plain bad,
>especially considering the resulting cage its king finds itself in
>later.  But I've looked over the other moves and find it difficult to
>suggest something better.  At first, I thought that a move like Bf3 ( in
>place of crafty's earlier pawn advances ) might have helped, but that
>doesn't seem to work out.  Bf3 to keep the knight at bay, increase the
>bishop's scope, and prevent the resulting pin later on.  I really liked
>crafty's earlier f4, dumping the pawn to free his bishop and break up
>the black pawn structure.  Does anyone have a suggestion?
>
>BTW, I'm amazed that I've never heard of this virtual chess 2 program
>before...incredible player.

It's always been strong.  Won the French championships a couple of times
including this year and year before last.  My evaluation of it is that
it
is fast and plays solid.  Reminds me a lot of Ferret, only not as fast
as
Ferret.

This position was interesting.  I've looked at it for a while myself.  I
simply don't like a lot of things that happened, but felt that Crafty
played quite reasonably most of the time.  Allowing the opponent a good
bit of leeway at times (ie letting the rook and queen reach its second
rank seemed risky to me) but it seems to know what it was doing.  It
just
reached a position where it was losing, without knowing it was losing.
The
bad thing is it saw all of the opponent's threats, just couldn't find a
way
to solve them.

The game this morning was probably the worst I've seen Crafty play.  It
is apparent that the evaluation is having problem with the search depths
we are seeing in Paris.  It is having lots of problems figuring out what
to do, and when.  IE it seems to be out-searching the eval and making
some
decisions that are simply not-so-good in this kind of competition.  I
don't
think it is playing badly overall, because it has been doing very well
on
the servers both against good humans and against other programs.  Losing
3
in a row is unusual, but not unexpected.  IE I have seen it win 10 in a
row
from gnuchess, then lose 4 right back.  As strong as everyone is an
Paris,
excepting a very few right at the bottom, losing 3 in a row is well
within
the laws of probability.

unfortunately.. :)



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