Ticket #199: gunnar_7_12.8b.diff

engine/owl.c

@@ -1017 +1019 @@
    * interesting if the opponent doesn't already have two eyes.
    * If we have more eyes, always check for a backfilling move.
    */
-  if (!you_look_alive
+  if ((!you_look_alive || we_might_be_inessential)
       && !safe_outside_liberty_found
       && (moves[0].value < 110 || I_have_more_eyes)) {
     int pos;
@@ -1059 +1064 @@
    * to fill a mutual liberty or play a corresponding backfilling
    * move.
    */
-  if (!you_look_alive) {
+  if (!you_look_alive || we_might_be_inessential) {
     if (safe_outside_liberty_found
         && outside_liberty.pos != NO_MOVE) {
       move_value = semeai_move_value(outside_liberty.pos,
@@ -5928 +5928 @@
         already_checked[lunch] = 1;
 
         attack_and_defend(lunch, &acode, &apos, &dcode, &dpos);
-        if (acode != 0) {
+        if (acode != 0
+            && (!liberty_of_goal(apos, owl) || safe_move(apos, color))) {
           owl->lunch[lunches] = lunch;
           owl->lunch_attack_code[lunches]  = acode;
           owl->lunch_attack_point[lunches] = apos;