[gnugo-devel] small_semeai found harmful

[bump]

Today Gunnar and I watched as small_semeai() caused a series of blunders in
the game gnugo-3.3.9-tsuku-200210121857.sgf. Moves after 207 which have
nothing to do with the situation in the upper left corner are thought
to attack the black dragon in the upper left corner.

Here are the results of taking down the call to small_semeai().
This patch is now in the CVS.

./regress.sh . 13x13.tst 
20 unexpected PASS!
./regress.sh . semeai.tst 
21 unexpected FAIL: Correct 'ALIVE DEAD (T17|T19)', got 'DEAD ALIVE PASS'
22 unexpected FAIL: Correct 'ALIVE DEAD (L15|L17|L18)', got 'ALIVE DEAD H15'

Dan

Index: engine/worm.c
===================================================================
RCS file: /cvsroot/gnugo/gnugo/engine/worm.c,v
retrieving revision 1.43
diff -u -r1.43 worm.c
--- engine/worm.c       26 Sep 2002 20:28:09 -0000      1.43
+++ engine/worm.c       12 Oct 2002 20:59:00 -0000
@@ -240,7 +240,9 @@
   gg_assert(stackp == 0);
 
   /* We try first to resolve small semeais. */
+#if 0
   small_semeai(save_verbose);
+#endif
   gg_assert(stackp == 0);
 
   /* Now we try to improve the values of worm.attack and worm.defend.