RewriteEngine On

RewriteBase /chat/

RewriteRule ^(\d+)/?$ index.php?page=$1 [QSA,L]
RewriteRule ^truncate/?$ index.php?truncate [QSA,L]
RewriteRule ^answer/([^/]+)/?$ index.php?login=$1&answer [QSA,L]
RewriteRule ^cit/([^/]+)/([^/]+)/?$ index.php?login=$1&cit=$2 [QSA,L]
RewriteRule ^delete/(\d+)/?$ index.php?id=$1&delete [QSA,L]
RewriteRule ^delete/(\d+)/yes/?$ index.php?id=$1&delete=1 [QSA,L]