[kh99]

Here's an article on how to create a page: https://vborg.vbsupport.ru/showthread.php?t=228112

Or if the page is simple you could instead use the misc.php page by creating a plugin using hook misc_start and code like:

if ($_REQUEST['do'] == 'contest')
{
    // build table html
   print_output($output);  // or end with print_output($templater->render()); if your output is a template
}