🚀 go-pugleaf

The pawn ram code in gnuchess as it is currently implemented is
ineffective.  The code is given in eval.c PawnValue() as

          if (rank != 7 && color[sq+8] == black && board[sq+8] == pawn) 
            s -= PCRASH;

This says that if the square in front of a white pawn contains a black
pawn, then the white side is penalised by PCRASH.  A similar code is
also given for black pawns.  The problem with this code is that it is not
assymetric.  This means that if there is a pawn ram, both the computer
and its opponent will be penalised by PCRASH and consequently both
penalties cancel eash other out.  To fix this, change the above to

          if (c1==computer && rank != 7 && color[sq+8] == black && 
              board[sq+8] == pawn) 
                 s -= PCRASH;

Now, only the computer is penalized and not the opponent.  The same
thing can be done with the pawn ram code for black pawns too.


Kong Sian