How come the Kakuro puzzle prints without the gray background or diagonals?
If you’re using a version of Internet Explorer, open the “Tools” menu in Internet Explorer, select “Internet Options”, switch to the “Advanced” tab and enable “Print background colors and images” in the “Printing” section. If you’re using Firefox select “File” found in the top left corner of the browser, scroll down to “Page Setup”, and enable the Options checkbox “Print Background (colors & images)”. For other browsers similar steps can be taken.