🚀 go-pugleaf

In article <2hnt0j$qe@nuscc.nus.sg> nsrccks@leonis.nus.sg (Chua Kong Sian) writes:
>
>There is a minor bug in CaptureList () in genmoves.c.  For pawn captures
>and promotion, one branch of the capture did not have underpromotion in
>it and the other does.  The fix is very easy.  Just copy the code from
>the other capture branch.
>
>Kong Sian

So to fix this problem is CaptureList () we change the following snippet:
==========OLD CODE APPEARS FIRST FOLLOWED By FIXED CODE FROM CAPTURELIST===

      else
	{
	  pdir = nextdir[ptype[side][piece]][sq];
	  if (piece == pawn && row (sq) == r7)
	    {
	      u = pdir[sq];
	      if (color[u] == xside) // HERE IS THE PROBLEM!!!
		Link (sq, u, capture | promote | queen, valueQ);
	      u = pdir[u];
	      if (color[u] == xside)
		{
		  Link (sq, u, capture | promote | queen, valueQ);
#if !defined OLDXBOARD  && !defined GNU3 && !defined CHESSTOOL
		  Link (sq, u, capture | promote | knight, valueN);
		  Link (sq, u, capture | promote | rook, valueR);
		  Link (sq, u, capture | promote | bishop, valueB);
#endif
		}
	      ppos = nextpos[ptype[side][piece]][sq];
	      u = ppos[sq];	/* also generate non capture promote */
	      if (color[u] == neutral)
		{
		  Link (sq, u, promote | queen, valueQ);
#if !defined OLDXBOARD  && !defined GNU3 && !defined CHESSTOOL
		  Link (sq, u, promote | knight, valueN);
		  Link (sq, u, promote | rook, valueR);
		  Link (sq, u, promote | bishop, valueB);
#endif
		}
	    }

----------------Old Code Above Fixed code below -----------
to:

      else
	{
	  pdir = nextdir[ptype[side][piece]][sq];
	  if (piece == pawn && row (sq) == r7)
	    {
	      u = pdir[sq];
	      if (color[u] == xside)
               {
		Link (sq, u, capture | promote | queen, valueQ);
#if !defined OLDXBOARD  && !defined GNU3 && !defined CHESSTOOL
	        Link (sq, u, capture | promote | knight, valueN);
		Link (sq, u, capture | promote | rook, valueR);
		Link (sq, u, capture | promote | bishop, valueB);
#endif
               }
	      u = pdir[u];
	      if (color[u] == xside)
		{
		  Link (sq, u, capture | promote | queen, valueQ);
#if !defined OLDXBOARD  && !defined GNU3 && !defined CHESSTOOL
		  Link (sq, u, capture | promote | knight, valueN);
		  Link (sq, u, capture | promote | rook, valueR);
		  Link (sq, u, capture | promote | bishop, valueB);
#endif
		}
	      ppos = nextpos[ptype[side][piece]][sq];
	      u = ppos[sq];	/* also generate non capture promote */
	      if (color[u] == neutral)
		{
		  Link (sq, u, promote | queen, valueQ);
#if !defined OLDXBOARD  && !defined GNU3 && !defined CHESSTOOL
		  Link (sq, u, promote | knight, valueN);
		  Link (sq, u, promote | rook, valueR);
		  Link (sq, u, promote | bishop, valueB);
#endif
		}
	    }


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