diff -r 1ff267cae316 -r 69f36c98808b pre_marking4/knight1_test3b.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pre_marking4/knight1_test3b.scala	Mon Jan 18 22:12:39 2021 +0000
@@ -0,0 +1,12 @@
+import CW9a._
+//type Pos = (Int, Int)    // a position on a chessboard 
+//type Path = List[Pos]    // a path...a list of positions
+
+def count_all_tours_urban(dim: Int) = {
+  for (i <- (0 until dim).toList; 
+       j <- (0 until dim).toList) yield count_tours(dim, List((i, j)))
+}
+
+
+assert(count_all_tours_urban(5) == List(304, 0, 56, 0, 304, 0, 56, 0, 56, 0, 56, 0, 64, 0, 56, 0, 56, 0, 56, 0, 304, 0, 56, 0, 304))
+