1 def urbanmain() = {

     2   import M4._

     3 

     4   val b2 = Board(Set(King(2, Red, (4,2)), King(2, Wht, (7,1)),

     5                      Pawn(3, Red, (6,1)), Pawn(2, Wht, (8,4)),

     6                      Pawn(4, Red, (4,4)), Pawn(2, Wht, (4,1)),

     7                      Pawn(4, Red, (5,3)), Pawn(3, Wht, (8,7)),

     8                      Pawn(3, Red, (6,5))))

     9 

    10   assert(protectedN(Pawn(2, Wht, (8,4)), b2) == 1)

    11   assert(protectedN(Pawn(4, Red, (5,3)), b2) == 3)

    12 

    13 }