diff --git a/countBattles.txt b/countBattles.txt
index faf0797..ac3f740 100644
--- a/countBattles.txt
+++ b/countBattles.txt
@@ -1 +1 @@
-1448
\ No newline at end of file
+1456
\ No newline at end of file
diff --git a/src/arenas/tron/act.php b/src/arenas/tron/act.php
index 397fd9b..902dc41 100644
--- a/src/arenas/tron/act.php
+++ b/src/arenas/tron/act.php
@@ -16,70 +16,19 @@ require_once(__DIR__."/functions.php");
 switch ($_POST['act']){
   case "initGame":
   
-    //check if bots exists
     $botsArrayTemp = json_decode($_POST['bots']);
-    
-    $bots = array();
-    $positions = array();
-    $botCount = 0;
-    foreach($botsArrayTemp as $botId){
-      do{
-	  $x = rand(1,999);
-	  $y = rand(1,999);
-      }while(in_array($x.",".$y,$positions));
-      
-      $positions[] = $x.",".$y;
-      $bots[$botCount] =  new TronPlayer($botId,$x,$y,'y+');
-      
-      if  ($bots[$botCount]->getStatus() === false){
-       unset($bots[$botCount]);
-      }else{
-	$botCount++;
-      }
-      
-    }
-    $_SESSION['players'] = $botCount;
-    if ($botCount < 2){
-	error (500,"missing bots");
-    }
-
-    $logs="";
-    
-    //send init message
-    $gameId = get_unique_id();
-    $responses = array();
-
-    for ($botCount = 0; $botCount < count($bots); $botCount ++){
-      $messageArr = array(
-	'game-id'	=> "".$gameId,
-	'action'	=> 'init',
-	'game'		=> 'tron',
-	'board'		=> '',
-	'players'	=> $_SESSION['players'],
-	'player-index'	=> $botCount
-      );
-      
-      $resp = get_IA_Response($bots[$botCount]->getURL(),$messageArr);
-      if($_POST['fullLogs'] == "true"){
-	$logs.='Arena send to '.$bots[$botCount]->getName().'<em>'.htmlentities($resp['messageSend']).'</em><br/>
-	HTTP status: <em>'.htmlentities($resp['httpStatus']).'</em><br/>
-	Bot anwser: <em>'.htmlentities($resp['response']).'</em><br/>';
-      }else{
-	$logs.="Init message send to ".$bots[$botCount]->getName()."<br/>";
-      }
-      
-    }
-    
-    //save bots on session var
-    $_SESSION['bots'] = serialize($bots);
-    $_SESSION['gameId'] = $gameId;
+    $game = new TronGame($botsArrayTemp);
+    $logs = $game->init_game();
     
     echo json_encode(array(
-      'status'	=> 'OK',
-      'logs'	=> $logs,
-      'gameId'	=> $gameId
+      'status'	=> $game->getStatus();,
+      'logs'	=> $logs
+      'gameId'	=> $game->getGameId();
     ));
     
+    $_SESSION['game'] = serialize($game);
+  
+    
     die;
     break;
   case "play":
@@ -114,19 +63,19 @@ switch ($_POST['act']){
 	
 	$busyCells = array_merge($busyCells, $bots[$botCount]->getTail()); 
 	$responses[$botCount] = get_IA_Response($bots[$botCount]->getURL(),$messageArr);
-	
-	if(in_array($responses[$botCount]['responseArr']['play'], $busyCells)){
+	print_r($responses[$botCount]);
+	if(in_array($bots[$botCount]->getTargetCell($responses[$botCount]['responseArr']['play']), $busyCells)){
 	  //this bot plays on a non empty cell, it looses
 	  $bots[$botCount]->loose();
 	  $logs.= $bots[$botCount]->getName()." Played on a non empty cell, he loses.<br/>";
 	  $loosingBots[] = $bots[$botCount]->getName();
 	}else{
-	  $targets[] = $responses[$botCount]['responseArr']['play'];
+	  $targets[] = $bots[$botCount]->getTargetCell($responses[$botCount]['responseArr']['play']);
 	}
 	
       }
     }
-
+    //test if some bots plays at the same place
     for ($botCount = 0; $botCount < count($bots); $botCount ++){
       if($bots[$botCount]->getStatus()){
 	 
diff --git a/src/arenas/tron/functions.php b/src/arenas/tron/functions.php
index aeb6dc5..95dd157 100644
--- a/src/arenas/tron/functions.php
+++ b/src/arenas/tron/functions.php
@@ -17,6 +17,95 @@ function save_draw_bots($arr){
     save_draw_bots($arr);
   }
 }
+class TronGame{
+  private $bots;
+  private $gameId;
+  public function getGameId(){
+    return $this->gameId;
+  }
+  public function get_continue(){
+    //count bots alive. if less than 1, game is ended
+    $count = 0;
+    foreach($this->bots as $bot){
+      if( $bot->getStatus() == true){
+	$count++;
+      }
+    }
+    if($count > 1){
+      return true;
+    }else{
+      return false;
+    }
+  }
+  public function init_game(){
+    //send init messages to bots
+    
+    $nbeBots = count($this->bots);
+    for ($botCount = 0; $botCount < $nbeBots; $botCount++){
+      $messageArr = array(
+	'game-id'	=> "".$this->gameId,
+	'action'	=> 'init',
+	'game'		=> 'tron',
+	'board'		=> '',
+	'players'	=> $nbeBots,
+	'player-index'	=> $botCount
+      );
+      
+      $resp = get_IA_Response($bots[$botCount]->getURL(),$messageArr);
+      
+      if($_POST['fullLogs'] == "true"){
+	$logs.='Arena send to '.$bots[$botCount]->getName().'<em>'.htmlentities($resp['messageSend']).'</em><br/>
+	HTTP status: <em>'.htmlentities($resp['httpStatus']).'</em><br/>
+	Bot anwser: <em>'.htmlentities($resp['response']).'</em><br/>';
+      }else{
+	$logs.="Init message send to ".$bots[$botCount]->getName()."<br/>";
+      }
+      
+      //check response
+      if(
+	  ($resp['httpStatus'] <> 200)
+	  OR (!pregmatch('^[0-9]*,[0-9]*$', $resp['responseArr']))
+	){
+	   $this->bots[$botCount]->loose();
+	   $logs.= $this->bots[$botCount]->getName." Made a non conform response <br/>";
+	}
+      
+    }
+    
+    return $logs;
+  }
+  private function getBusyCells(){
+    $arr=array();
+    foreach($this->bots as $bot){
+      $arr = array_merge($arr,$bot->getTail);
+    }
+    return $arr;
+  }
+  public function __construct($botsIds){
+  
+    $this->gameId = get_unique_id();
+    $this->bots = array();
+    $positions = array();
+    $botCount = 0;
+    $err = "";
+    foreach($botsIds as $botId){
+      //find a random start position
+      do{
+	  $x = rand(1,999);
+	  $y = rand(1,999);
+      }while(in_array($x.",".$y,$positions));
+      
+      $positions[] = $x.",".$y;
+      $this->bots[$botCount] =  new TronPlayer($botId,$x,$y,'y+');
+      
+      if  ($this->bots[$botCount]->getStatus() === false){
+       $err = "Something went wrong for ".$this->bots[$botCount]->getName()."<br/>";
+      }
+    }
+    return $err;
+  }
+}
+
 class TronPlayer{
   private $url;
   private $name;
@@ -45,39 +134,42 @@ class TronPlayer{
      ){
 	return false;
     }
-    $this->direction = $newdir;
+    $this->direction = $newDir;
     return true;
   }
-
-  public function grow($dir=""){
+  public function getTargetCell($dir){
+  
     if($dir == ""){
       $dir = $this->direction;
     }
-    if(!$this->set_direction()){
+    if(!$this->set_direction($dir)){
       return false;
     }
     $headCoords = end($this->tail);
     
     switch ($dir){
       case "y+":
-	$targetCoords = array($headCoords[0],$headCoords[1]++);
+	return array($headCoords[0],$headCoords[1]++);
 	break;
       case "y-":
-	$targetCoords = array($headCoords[0],$headCoords[1]--);
+	return array($headCoords[0],$headCoords[1]--);
 	break;
       case "x+":
-	$targetCoords = array($headCoords[0]++,$headCoords[1]);
+	return array($headCoords[0]++,$headCoords[1]);
 	break;
       case "x-":
-      $targetCoords = array($headCoords[0]--,$headCoords[1]);
+	return array($headCoords[0]--,$headCoords[1]);
 	break;
       default:
 	return false;
     }
-    $this->tail[] = $targetCoords;
-
+  
+  
   }
   
+  public function grow($dir=""){
+    $this->tail[] = $this->getTargetCell($dir);
+  }
   public function loose(){
     $this->state = false;
     $this->tail = array();
@@ -97,8 +189,5 @@ class TronPlayer{
     }else{
       $this->state = false;
     }
-  
-  
-  
   }
 }
\ No newline at end of file