diff --git a/src/go/helperboard.py b/src/go/helperboard.py
--- a/src/go/helperboard.py
+++ b/src/go/helperboard.py
@@ -49,6 +49,6 @@ class HelperBoard:
 			self._board[r][c]=EMPTY
 		self._visitedCount=0
 		for i in range(self._libCount):
-			(r,c)=(self._libs[i*2],self._visited[i*2+1])
+			(r,c)=(self._libs[i*2],self._libs[i*2+1])
 			self._board[r][c]=EMPTY
 		self._libCount=0