diff -r 44383203970f -r e2170c91a9f2 pre_marking4/knight1_test2.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pre_marking4/knight1_test2.scala	Mon Jan 18 22:12:39 2021 +0000
@@ -0,0 +1,13 @@
+import CW9a._
+
+assert(legal_moves(8, Nil, (2,2)) == 
+             List((3,4), (4,3), (4,1), (3,0), (1,0), (0,1), (0,3), (1,4)))
+assert(legal_moves(8, Nil, (7,7)) == List((6,5), (5,6)))
+assert(legal_moves(8, List((4,1), (1,0)), (2,2)) == 
+       List((3,4), (4,3), (3,0), (0,1), (0,3), (1,4)))
+assert(legal_moves(8, Nil, (0,1)) == List((1,3), (2,2), (2,0)))
+assert(legal_moves(8, List((6,6)), (7,7)) == List((6,5), (5,6)))
+assert(legal_moves(1, Nil, (0,0)) == Nil)
+assert(legal_moves(2, Nil, (0,0)) == Nil)
+assert(legal_moves(3, Nil, (0,0)) == List((1,2), (2,1)))
+