location /sudoku/ {
        alias /var/www/sudoku/;

        if ($scheme = http) {
                rewrite ^ https://$server_name$request_uri? permanent;
        }

        try_files $uri $uri/;
       
        location ~ [^/]\.php(/|$) {
                try_files $uri =404;
                fastcgi_split_path_info ^(.+?\.php)(/.*)$;
                fastcgi_pass unix:/var/run/php/php7.3-fpm-sudoku.sock;
                fastcgi_index index.php;
                include fastcgi_params;
                fastcgi_param REMOTE_USER $remote_user;
                fastcgi_param PATH_INFO $fastcgi_path_info;
                fastcgi_param SCRIPT_FILENAME $request_filename;
        }

        error_page 404 /sudoku/404.php;
        location  /sudoku/404.php {
                internal;
        }
}

location ~ "^/sudoku/([1-9.]{81})$" {
        rewrite "^/sudoku/([1-9.]{81})\??(.*)?(#.*)?$" /sudoku/sudoku.php?grid=$1&$2$3 last;
}