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Article #5175

Re: Bug in PawnValue

#5175
From: Chua Kong Sian
Date: Fri, 08 Apr 1994 09:01
33 lines
1685 bytes
Roger Uzun (uzun@crash.cts.com) wrote:
: In 4pl69 the line in question in pawnvalue, is already as 
: below:
: In PawnValue () in eval.c, there is a slight bug.  The line
: in question already appears as below:

: if (rank != 0 && color[sq-8] == white && board[sq-8] == pawn)
: s -= PCRASH;

: This is what yourecommended to change it to, but it is already
: sq-8 in pl69, is this correct?  Should we change it to sq+8?
: Were you thinking of rank != 7?

: -Roger
: --------------------------------------------------------------
: bix: ruzun
: NET: uzun@crash.cts.com

Strange.  The pl69 which I obtained from prep.ai.mit.edu shows

if (rank != 0 && color[sq+8] == white && board[sq+8] == pawn) s -= PCRASH;

which is WRONG.  Where did you get your pl69 from?  The CORRECT line
should be

if (rank != 0 && color[sq-8] == white && board[sq-8] == pawn) s -= PCRASH;

If you already have that, then fine, don't change anything.

PS.  No, I was not refering to the line which has rank != 7.  That line
is correct and needs no changing.

Kong Sian
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From: nsrccks@leonis.nus.sg (Chua Kong Sian)
Newsgroups: gnu.chess
Subject: Re: Bug in PawnValue
Date: 8 Apr 1994 09:01:18 GMT
Organization: National University of Singapore
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