might fix a rare multi-threaded UCB1-GRAVE crash

Ludeme · May 25, 2024 · 79d02cf · 79d02cf
1 parent ef40e13
commit 79d02cf
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/AI/src/search/mcts/selection/UCB1GRAVE.java b/AI/src/search/mcts/selection/UCB1GRAVE.java
@@ -117,7 +117,7 @@ public int select(final MCTS mcts, final BaseNode current)
 //        			System.out.println("current context legal moves = " + current.contextRef().activeGame().moves(current.contextRef()));
 //        		}
 
-        		final int childVisits = child.numVisits() + child.numVirtualVisits();
+        		final int childVisits = Math.max(child.numVisits() + child.numVirtualVisits(), 1);
 
         		if (graveStats == null)
         		{