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Subject: Re: Queen-side castling - problem for chess programs?

Author: Carl Cox

Date: 09:21:37 02/20/01

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On February 19, 2001 at 07:44:30, John Wentworth wrote:

>This is just an observance and may be completely wrong, but it seems that when a
>program castles Queen side his chances of losing go up by a lot. Every time I
>see a program do this, I say to myself he's going to lose and I bet more than
>60% of the time he does. This may be a problem with humans vs humans as well, I
>don't know. Anyone else notice this?


I have noticed this too. I always figured that the reason the program castles on
the Qside in the first place is because he is unable to do so on the Kside......
viz: the game is not going ideally for him and he is in a slightly weak spot.

I'm just curious - assuming that a program can castle on either side on the same
move, and assuming that all tactical and other strategic considerations evaluate
the same for both moves, which side will the program choose to castle on?
Is it a random choice between the two moves or is Kside castling preferred?

What about other positions where 2 or more moves eveluate exactly the same (rare
as that may be!) how does the modern chess playing program handle this?

CC.



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