diff --git a/code/dlgo/goboard.py b/code/dlgo/goboard.py
index 10faef88..a9f6ed84 100644
--- a/code/dlgo/goboard.py
+++ b/code/dlgo/goboard.py
@@ -88,7 +88,6 @@ def place_stone(self, player, point):
             else:
                 if neighbor_string not in adjacent_opposite_color:
                     adjacent_opposite_color.append(neighbor_string)
-        new_string = GoString(player, [point], liberties)
 # tag::apply_zobrist[]
         new_string = GoString(player, [point], liberties)  # <1>