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Subject: Re: u2600 Club Rating List - Jan 25

Author: Andrew Williams

Date: 02:12:09 01/26/99

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On January 25, 1999 at 18:30:20, KarinsDad wrote:

>
>I don't understand. Couldn't you just as easily find positions that had castling
>in the TT way before you actually castle in your position? What is so special
>about castling? Is it that the number of transpositions drop drastically after
>castling (even though some would still be there)? Also, wouldn't castling often
>be within opening book moves so you are not yet in your TT?

Sorry, I wasn't being particularly clear here. What I mean is that after I
castle, I change the pawn scoring to reflect the side the King is now sitting
on. So the pawns on that side are told to stay put, while the ones on the
other side are allowed to advance (this is a simplification, of course). So
I clear the TTs because the scores from before castling are not compatible
with those after castling.


Andrew



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