Re: [gnugo-devel] vital owl defense

[Arend Bayer]

Gunnar wrote:

> Arend wrote:
> > While there are matching vital owl attack patterns, we make it harder
> > for do_owl_defend to claim life (and hence cut the search).
> >
> > [...]
> >
> > This reduces owl nodes for nngs.tst by ~2% and probably gets exactly
> > one PASS for the whole regression test suite (a good one).
>
> I'm currently seeing a huge and rather negative regression delta,
> including

> Backing out arend_3_12.5 all of these disappear. Did something go
> wrong with this patch?

Sorry. I installed a wrong version of the patch. Reverting the hunk
below should fix it. I'll cross-check and put it in CVS tomorrow.

Arend

Index: engine/owl.c
===================================================================
RCS file: /cvsroot/gnugo/gnugo/engine/owl.c,v
retrieving revision 1.121
diff -u -p -r1.121 owl.c
--- engine/owl.c        15 Nov 2002 19:39:45 -0000      1.121
+++ engine/owl.c        16 Nov 2002 19:39:49 -0000
@@ -1984,6 +1988,12 @@ do_owl_defend(int str, int *move, int *w
        READ_RETURN(read_result, move, shape_moves[0].pos, WIN);
       }
       moves = shape_moves;
+
+      if (eyemax == 0 && escape_route == 0)
+       move_cutoff = 67;
+      else if (eyemax <= 1 && escape_route <= 2)
+       move_cutoff = 32;
+
       break;

     case 0: