Cum sa setati numarul maxim de playeri pe o runda

<?php
$version=1;
$action=$_GET['action'];
if($action=="login"){$user=$_POST['user'];$pass=$_POST['password'];mysql_real_escape_string($pass);mysql_real_escape_string($user);require("include/config.php");mysql_connect($config['db_host'],$config['db_user'],$config['db_pw']) or die("SQL::Error");mysql_select_db($config['db_name']) or die("DB:Error");
$query=mysql_query("SELECT id FROM users WHERE username='$user' AND password='".md5($pass)."'") or die("Query:Error");
$nr=mysql_num_rows($query);
    if($nr>=1){
        $da=mysql_fetch_array($query);$query=mysql_query("SELECT * FROM round");$r=mysql_fetch_array($query);
        $sql=mysql_query("SELECT * FROM round_players");
        $x=mysql_num_rows($sql);
        if($x < $r['free'] ){
            $query=mysql_query("SELECT * FROM round_players WHERE user='$user'");
                if(mysql_num_rows($query)<1){
                $query=mysql_query("INSERT INTO round_players VALUES('','$user','no','".$da['id']."')");
                }
        }else{
            $query=mysql_query("SELECT * FROM round_players WHERE user='$user'");
                if(mysql_num_rows($query)<1){
            die("Sorry, all free slots have been taken, you can't play this round.");
            }
        }
    }
    else{die("Invalid login!");
    }
}

/*This encoded file was generated using PHPCoder and eAccelerator ... etc*/

Deschideti acuma http://localhost/phpmyadmin , selectati baza de date "lan" sau de la lumea respectiva din stanga , dati click pe SQL si adaugati urmatoarele linii :
CREATE TABLE `round` (
  `id` int(255) NOT NULL auto_increment,
  `round_name` text collate latin1_general_ci NOT NULL,
  `free` int(255) NOT NULL,
  `round_end` int(255) NOT NULL,
  `extra` int(255) NOT NULL,
  PRIMARY KEY  (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci AUTO_INCREMENT=2 ;
INSERT INTO `round` VALUES (1, 'SDS limited', 10, 3600, 15);
CREATE TABLE `round_players` (
  `id` int(255) NOT NULL auto_increment,
  `user` text collate latin1_general_ci NOT NULL,
  `premium` text collate latin1_general_ci NOT NULL,
  `pid` int(255) NOT NULL,
  PRIMARY KEY  (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci AUTO_INCREMENT=1 ;

require("../include/config.php");
mysql_connect($config['db_host'],$config['db_user'],$config['db_pw']) or die("SQL::Error");
mysql_select_db($config['db_name']) or die("DB:Error");
$screen=$_GET['screen'];$action=$_GET['action'];$do=$_GET['do'];
if($screen=="reset"&&$action=="reset"&&$do=="soft"){
$query=mysql_query("truncate table round_players") or die("Didn't work to empty users");
}