 #        return true;
 #    
 #
-#    return false;
+    return deadlocked_positions
 
   ###
     Test a specific deadlocked square and return the deadlocked positions

        deadlocked_positions.push({ m:pos3.m, n:pos3.n })
                
    return deadlocked_positions
          
  ###
    return true if position is in a corner of level (corner with 2 walls)

    deadlocked_positions = @deadlocked_square(cell.box, cell.down, cell.down_left, cell.left,
                                              pos.box,  pos.down,  pos.down_left,  pos.left,
                                              deadlocked_positions)
                                                  
    ###
    # Last push made a Z deadlock
    ###
