Update 'board'

board

@@ -158,10 +158,10 @@ def kb_listen(objectArray, gridLength):
 
 
 #moje
-def manhattan(field1, field2):#nasze punktyNOWE
-    tuple1 = zip(field1, field2)#łączymy xpos1 z xpos2 i ypos1 z ypos2
-    for i, j in tuple1:
-        distance = sum(abs(i - j))#dodajemy wartości bezwzględne różnic x i y
+def manhattan(node1, node2):
+    x1, y1 = node1.state[0], node1.state[1]
+    x2, y2 = node2.state[0], node2.state[1]
+    distance = abs(x1 - x2) + abs(y1 - y2)
     return distance