private JMenu makeSizeMenu() {
      JMenu size = new JMenu("Size");
      for (int i = 0; i < sizeChoices.length; i++) {
         final int r = sizeChoices[i][0];
         final int c = sizeChoices[i][1];
         JMenuItem item = new JMenuItem(r + "-by-" + c);
         item.addActionListener( new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
               setBoardSize(r,c);
            }
         });
         size.add(item);
      }

      return size;
   }