diff --git a/pickaxe.py b/pickaxe.py
index dbd71fe..6bb68ac 100644
--- a/pickaxe.py
+++ b/pickaxe.py
@@ -171,21 +171,24 @@ class Pickaxe_Field(GameBase):
         else:
             points = points - 10000
 
-        second_higest = np.unique(shift_dir)[-2]
-        if shift_dir[1][3] == second_higest:
-            points = points + 300
-
-        if shift_dir[2][3] is not 0:
-            if shift_dir[2][3] == np.unique(shift_dir)[-3]:
-        #third_higest = np.unique(shift_dir)[-3]
-        #if shift_dir[2][3] == third_higest:
+        if np.unique(shift_dir)[-2] is not None:
+            second_higest = np.unique(shift_dir)[-2]
+            if shift_dir[1][3] == second_higest:
                 points = points + 300
 
-        if shift_dir[3][3] is not 0:
-            if shift_dir[3][3] == np.unique(shift_dir)[-4]:
-        #fourth_higest = np.unique(shift_dir)[-4]
-        #if shift_dir[3][3] == fourth_higest:
-                points = points + 300
+        if np.unique(shift_dir)[-3] is not None:
+            if shift_dir[2][3] is not 0:
+                if shift_dir[2][3] == np.unique(shift_dir)[-3]:
+            #third_higest = np.unique(shift_dir)[-3]
+            #if shift_dir[2][3] == third_higest:
+                    points = points + 300
+
+        if np.unique(shift_dir)[-4] is not None:
+            if shift_dir[3][3] is not 0:
+                if shift_dir[3][3] == np.unique(shift_dir)[-4]:
+            #fourth_higest = np.unique(shift_dir)[-4]
+            #if shift_dir[3][3] == fourth_higest:
+                    points = points + 300
 
         if shift_dir[1][3] == highest - 1:
             points = points + 100