diff -r ed1b6b8c36e5 -r 0b727d1a8184 main_testing4/knight_test1.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main_testing4/knight_test1.scala	Mon Nov 02 02:31:44 2020 +0000
@@ -0,0 +1,6 @@
+import CW9a._
+
+assert(is_legal(8, Nil, (3, 4)) == true)
+assert(is_legal(8, List((4, 1), (1, 0)), (4, 1)) == false)
+assert(is_legal(2, Nil, (0, 0)) == true)
+