diff --git a/connectfour.php b/connectfour.php
index d4d1d8e..5a19b95 100644
--- a/connectfour.php
+++ b/connectfour.php
@@ -1,142 +1,58 @@
 <?php
+/*
+
+Bot for connectfour https://botsarena.tinad.fr/connectFour
+by Gnieark https://blog-du-grouik.tinad.fr/ june 2016 
+GNU GPL License
+
+    +--+--+--+--+--+--+--+
+5   |  |  |  |  |  |  |  |
+    +--+--+--+--+--+--+--+
+4   |  |  |  |  |  |  |  |
+    +--+--+--+--+--+--+--+
+3   |  |  |  |  |  |  |  |
+    +--+--+--+--+--+--+--+
+2   |  |  |  |  |  |  |  |
+    +--+--+--+--+--+--+--+
+1   |  |  |  |  |  |  |  |
+    +--+--+--+--+--+--+--+
+0   |  |  |  |  |  |  |  |
+    +--+--+--+--+--+--+--+
+      0  1  2  3  4  5  6
+*/
+
 header('Access-Control-Allow-Origin: *');
 header('Access-Control-Allow-Methods: GET, POST'); 
 header('Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept');
 
-/*
-* stupid IA for battle ship
-* choose by random a free column
-*/
+function can_win($line,$myChar){
+    //retourne la position du caractere a remplacer dans la ligne pour gagner
 
-function score($board,$me,$opponent,$colToPlay,$depth){
-  
-  $newBoard = $board;
-  //add cell
-  for($y = 0; $board[$y][$colToPlay] <> "+"; $y++){
-  }
-  $newBoard[$y][$colToPlay] = $me;
-  
-  //do I win?
+    if (strpos("+".$myChar.$myChar.$myChar,$line)  !== false ){
+        return strpos("+".$myChar.$myChar.$myChar,$line);
+    }
+    if (strpos($myChar.$myChar.$myChar."+",$line)  !== false ){
+        return strpos($myChar.$myChar.$myChar."+",$line) + 3;
+    }
+    return false;
+}
+function can_loose($line,$hisChar){
+    //je pourrai perdre aux 2 prochains tours de jeu
+    // retourne la place du caractere à remplacer pour éviter ça
+    if (strpos("+".$hisChar.$hisChar.$hisChar,$line)  !== false ){
+        return strpos("+".$hisChar.$hisChar.$hisChar,$line);
+    }
+    if (strpos($hisChar.$hisChar.$hisChar."+",$line)  !== false ){
+        return strpos($hisChar.$hisChar.$hisChar."+",$line) + 3;
+    }
+    if (strpos("+".$hisChar.$hisChar."+",$line)  !== false ){
+        return strpos("+".$hisChar.$hisChar."+",$line);
+    }
+    return false;
     
-  $searchValue="";
-  for($i = 0 ; $i < 4; $i++){
-    $searchValue.=$me;
-  }
-  //horizontaly
-  $line="";
-  for ($i=0; $i < 7; $i++){
-      $line.=$newBoard[$y][$i]; 
-  }
-  if(strpos($searchValue,$line)  !== false ){
-    return 200;
-  }
-   
-  //verticaly
-  $line="";
-  for ($i=0; $i < 6; $i++){
-      $line.=$newBoard[$i][$colToPlay];
-  }
-  //echo $line."p".$searchValue." ".strpos($searchValue,$line)."|\n";
-  if(strpos($searchValue,$line) !== false){
-    return 200;
-  }
-  
-  
-  //diagonal \
-  $line="";
-  $b = $y + $colToPlay;
-  
-  if($b < 6){
-    $ix = 0;
-    $iy = $b;
-  }else{
-    $ix = $b - 5;
-    $iy = 5;
-  }
-  for($jx = $ix, $jy = $iy; ($jx < 7) && ($jy > -1); $jx++, $jy--){
-      $line.=$newBoard[$jy][$jx];
-  }
-  if(strpos($searchValue,$line) !== false ){
-      return 200;
-  }
-  //diagonal /
-  $b = $y - $colToPlay;
-  if($b > -1){
-    $ix = 0;
-    $iy = $b;
-  }else{
-    $iy=0;
-    $ix = -$b;
-  }
-  $line="";
-
-  for ($jx = $ix , $jy = $iy ; ($jx < 7) && ($jy < 6) ; $jx++ , $jy++){
-   $line.=$newBoard[$jy][$jx];
-  }
-  if(strpos($searchValue,$line) !== false){
-    return 200;
-  }
-  
-  //if grid is full
-  $full = true;
-  for($i = 0; $i < 7; $i++){
-    if($newBoard[5][$i] == "+"){
-      $full = false;
-      break;
-    }
-  }
-  if($full){
-   return 0;
-  }
-  
-  if($depth < 6){
-  //CO
-   if(($depth % 2) == 0){  
-    return better_col($newBoard,$opponent,$me,$depth + 1) - $depth;
-   }else{
-    return $depth - better_col($newBoard,$opponent,$me,$depth + 1);
-   }
-  }else{
-    return 0;
-  }
 }
-
-function worst_col($board,$me,$opponent,$depth){
-  $worstScore= 1000;
-  $worstCol= -1;
-  for( $i = 0; $i < 7; $i++){
-    if($board[5][$i] == "+"){
-      $sc = score($board,$me,$opponent,$i,$depth);
-      if( $sc < $worstScore){
-	$worstScore = $sc -$depth;
-	$worstCol = $i;
-	//echo $i.":".$sc."|";
-      }
-    }
-  }  
-  return $worstScore;
-  
-}
-
-
-function better_col($board,$me,$opponent,$depth){
-  $betterScore= -1000;
-  $betterCol= -1;
-  for( $i = 0; $i < 7; $i++){
-    if($board[5][$i] == "+"){
-      $sc = score($board,$me,$opponent,$i,$depth);
-      if( $sc > $betterScore){
-	$betterScore = $sc;
-	$betterCol = $i;
-	//echo $i.":".$sc."|";
-      }
-    }
-  }  
-  return $betterCol;
-}
-
 //replace "" by " ", it will simplify my code.
-$in=str_replace('""','"+"',file_get_contents('php://input'));
+$in=str_replace('""','"_"',file_get_contents('php://input'));
 
 $params=json_decode($in, TRUE);
 switch($params['action']){
@@ -144,12 +60,22 @@ switch($params['action']){
 		echo '{"name":"Gnieark"}';
 		break;
 	case "play-turn":
-		//find $opponent
+		//find $opponent and clean grid
 		for($x = 0; $x < 7 ; $x++){
 		  for($y = 0; $y < 6 ; $y++){
-		    if(($params['board'][$y][$x] <> "+" ) && ($params['board'][$y][$x] <> $params['you'] )){
+		  
+                    //find opponent
+		    if(($params['board'][$y][$x] <> "_" ) && ($params['board'][$y][$x] <> $params['you'] )){
 		      $opponent= $params['board'][$y][$x];
 		    }
+		    
+		    //tester si la case est jouable (s'il y a un support en dessous)
+		    if  (($params['board'][$y][$x] == "_" )   
+                        AND (($y==0) OR ($params['board'][$y - 1][$x] <> "_"))
+                        ){
+                        //la case est jouable, je la marque par un "+"
+                        $params['board'][$y][$x] = "+";
+		    }
 		  }
 		}
 		if((!isset($opponent)) && ($params['you'] == "X")){
@@ -158,7 +84,126 @@ switch($params['action']){
 		  $opponent="X";
 		}
 
-	echo '{"play":"'.better_col($params['board'],$params['you'],$opponent,0).'"}';
+		//transformer la grille en lignes horizontales, verticales et diagonales
+		
+            
+		
+		//verticales
+		for($x = 0; $x <7; $x ++){
+                    $colStr="";
+                    for($y = 0; $y <6; $y ++){
+                        $colStr.= $params['board'][$y][$x];
+                    }
+                    if(can_win($colStr,$params['you']) !== false){
+                        echo '{"play":'.$x.'}';
+                        die;
+                    }
+                    if (can_loose($colStr,$opponent) !== false){
+                        $colForNoLose = $x;
+                    }
+		}
+		
+		//horizontales
+		for($y = 0; $y <6; $y ++){
+                    $lnStr="";
+                    for($x = 0; $x <7; $x ++){
+                       $lnStr.= $params['board'][$y][$x]; 
+                    }
+                    if(can_win($lnStr,$params['you']) !== false){
+                        echo '{"play":'.can_win($lnStr,$params['you']).'}';
+                        die;
+                    }
+                    if (can_loose($lnStr,$opponent) !== false){
+                        $colForNoLose = can_loose($lnStr,$opponent);
+                    }
+                    
+		}
+		
+		
+		//tester seulement les diagonales >= 4 cases
+		
+		for ($k = 0; $k < 4; $k ++){
+		
+                    //diagonale /
+                    $diagStr="";
+                    for($x=$k , $y=0; isset($params['board'][$y][$x]); $x++, $y++){
+                        $diagStr.=$params['board'][$y][$x];
+                    }
+                   if(can_win($diagStr,$params['you']) !== false){
+                        echo '{"play":'.$x.'}';
+                        die;
+                    }
+                    if (can_loose($diagStr,$opponent) !== false){
+                        $colForNoLose = $x;
+                    }
+                    
+                    //diagonale \
+                    $diagStr="";
+                    for($x=$k , $y=5; isset($params['board'][$y][$x]); $x++, $y--){
+                    $diagStr.=$params['board'][$y][$x];
+                    }
+                   if(can_win($diagStr,$params['you']) !== false){
+                        echo '{"play":'.$x.'}';
+                        die;
+                    }
+                    if (can_loose($diagStr,$opponent) !== false){
+                        $colForNoLose = $x;
+                    } 
+                    
+                    
+		}		
+		for ($k = 0; $k < 3; $k ++){
+                    //diagonale /
+                    $diagStr="";
+                    for($x = 0, $y = $k ; isset($params['board'][$y][$x]); $x++, $y++){
+                        $diagStr.=$params['board'][$y][$x];
+                    }
+                   if(can_win($diagStr,$params['you']) !== false){
+                        echo '{"play":'.$x.'}';
+                        die;
+                    }
+                    if (can_loose($diagStr,$opponent) !== false){
+                        $colForNoLose = $x;
+                    }
+		}
+		for ($k = 3 ; $k < 6 ; $k++){
+
+                    //diagonales \
+                    $diagStr="";
+                    for($x=0 , $y=$k; isset($params['board'][$y][$x]); $x++, $y--){
+                        $diagStr.=$params['board'][$y][$x];
+                    }
+                   if(can_win($diagStr,$params['you']) !== false){
+                        echo '{"play":'.$x.'}';
+                        die;
+                    }
+                    if (can_loose($diagStr,$opponent) !== false){
+                        $colForNoLose = $x;
+                    }
+                   
+                }
+
+                //si j'arrive là, je ne gagne pas à ce tour
+                if(isset($colForNoLose)){
+                    echo '{"play":'.$colForNoLose.'}';
+                    die;               
+                }
+
+                //still there? random
+		
+		$colAvailable=array();
+		//dont play on full colomns
+		for($i=0;$i<7;$i++){
+  			if(($params['board'][5][$i] == "+") OR ($params['board'][5][$i] == "_")){
+    				$colAvailable[]=$i;
+  			}
+		}
+		
+		shuffle($colAvailable);
+		echo '{"play":'.$colAvailable[0].'}';
+
+		
+	//echo '{"play":"'.better_col($params['board'],$params['you'],$opponent,0).'"}';
 		break;
 	default:
 		break;
diff --git a/connectfour2.php b/connectfour2.php
deleted file mode 100644
index 5a19b95..0000000
--- a/connectfour2.php
+++ /dev/null
@@ -1,210 +0,0 @@
-<?php
-/*
-
-Bot for connectfour https://botsarena.tinad.fr/connectFour
-by Gnieark https://blog-du-grouik.tinad.fr/ june 2016 
-GNU GPL License
-
-    +--+--+--+--+--+--+--+
-5   |  |  |  |  |  |  |  |
-    +--+--+--+--+--+--+--+
-4   |  |  |  |  |  |  |  |
-    +--+--+--+--+--+--+--+
-3   |  |  |  |  |  |  |  |
-    +--+--+--+--+--+--+--+
-2   |  |  |  |  |  |  |  |
-    +--+--+--+--+--+--+--+
-1   |  |  |  |  |  |  |  |
-    +--+--+--+--+--+--+--+
-0   |  |  |  |  |  |  |  |
-    +--+--+--+--+--+--+--+
-      0  1  2  3  4  5  6
-*/
-
-header('Access-Control-Allow-Origin: *');
-header('Access-Control-Allow-Methods: GET, POST'); 
-header('Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept');
-
-function can_win($line,$myChar){
-    //retourne la position du caractere a remplacer dans la ligne pour gagner
-
-    if (strpos("+".$myChar.$myChar.$myChar,$line)  !== false ){
-        return strpos("+".$myChar.$myChar.$myChar,$line);
-    }
-    if (strpos($myChar.$myChar.$myChar."+",$line)  !== false ){
-        return strpos($myChar.$myChar.$myChar."+",$line) + 3;
-    }
-    return false;
-}
-function can_loose($line,$hisChar){
-    //je pourrai perdre aux 2 prochains tours de jeu
-    // retourne la place du caractere à remplacer pour éviter ça
-    if (strpos("+".$hisChar.$hisChar.$hisChar,$line)  !== false ){
-        return strpos("+".$hisChar.$hisChar.$hisChar,$line);
-    }
-    if (strpos($hisChar.$hisChar.$hisChar."+",$line)  !== false ){
-        return strpos($hisChar.$hisChar.$hisChar."+",$line) + 3;
-    }
-    if (strpos("+".$hisChar.$hisChar."+",$line)  !== false ){
-        return strpos("+".$hisChar.$hisChar."+",$line);
-    }
-    return false;
-    
-}
-//replace "" by " ", it will simplify my code.
-$in=str_replace('""','"_"',file_get_contents('php://input'));
-
-$params=json_decode($in, TRUE);
-switch($params['action']){
-	case "init":
-		echo '{"name":"Gnieark"}';
-		break;
-	case "play-turn":
-		//find $opponent and clean grid
-		for($x = 0; $x < 7 ; $x++){
-		  for($y = 0; $y < 6 ; $y++){
-		  
-                    //find opponent
-		    if(($params['board'][$y][$x] <> "_" ) && ($params['board'][$y][$x] <> $params['you'] )){
-		      $opponent= $params['board'][$y][$x];
-		    }
-		    
-		    //tester si la case est jouable (s'il y a un support en dessous)
-		    if  (($params['board'][$y][$x] == "_" )   
-                        AND (($y==0) OR ($params['board'][$y - 1][$x] <> "_"))
-                        ){
-                        //la case est jouable, je la marque par un "+"
-                        $params['board'][$y][$x] = "+";
-		    }
-		  }
-		}
-		if((!isset($opponent)) && ($params['you'] == "X")){
-		  $opponent="O";
-		}elseif(!isset($opponent)){
-		  $opponent="X";
-		}
-
-		//transformer la grille en lignes horizontales, verticales et diagonales
-		
-            
-		
-		//verticales
-		for($x = 0; $x <7; $x ++){
-                    $colStr="";
-                    for($y = 0; $y <6; $y ++){
-                        $colStr.= $params['board'][$y][$x];
-                    }
-                    if(can_win($colStr,$params['you']) !== false){
-                        echo '{"play":'.$x.'}';
-                        die;
-                    }
-                    if (can_loose($colStr,$opponent) !== false){
-                        $colForNoLose = $x;
-                    }
-		}
-		
-		//horizontales
-		for($y = 0; $y <6; $y ++){
-                    $lnStr="";
-                    for($x = 0; $x <7; $x ++){
-                       $lnStr.= $params['board'][$y][$x]; 
-                    }
-                    if(can_win($lnStr,$params['you']) !== false){
-                        echo '{"play":'.can_win($lnStr,$params['you']).'}';
-                        die;
-                    }
-                    if (can_loose($lnStr,$opponent) !== false){
-                        $colForNoLose = can_loose($lnStr,$opponent);
-                    }
-                    
-		}
-		
-		
-		//tester seulement les diagonales >= 4 cases
-		
-		for ($k = 0; $k < 4; $k ++){
-		
-                    //diagonale /
-                    $diagStr="";
-                    for($x=$k , $y=0; isset($params['board'][$y][$x]); $x++, $y++){
-                        $diagStr.=$params['board'][$y][$x];
-                    }
-                   if(can_win($diagStr,$params['you']) !== false){
-                        echo '{"play":'.$x.'}';
-                        die;
-                    }
-                    if (can_loose($diagStr,$opponent) !== false){
-                        $colForNoLose = $x;
-                    }
-                    
-                    //diagonale \
-                    $diagStr="";
-                    for($x=$k , $y=5; isset($params['board'][$y][$x]); $x++, $y--){
-                    $diagStr.=$params['board'][$y][$x];
-                    }
-                   if(can_win($diagStr,$params['you']) !== false){
-                        echo '{"play":'.$x.'}';
-                        die;
-                    }
-                    if (can_loose($diagStr,$opponent) !== false){
-                        $colForNoLose = $x;
-                    } 
-                    
-                    
-		}		
-		for ($k = 0; $k < 3; $k ++){
-                    //diagonale /
-                    $diagStr="";
-                    for($x = 0, $y = $k ; isset($params['board'][$y][$x]); $x++, $y++){
-                        $diagStr.=$params['board'][$y][$x];
-                    }
-                   if(can_win($diagStr,$params['you']) !== false){
-                        echo '{"play":'.$x.'}';
-                        die;
-                    }
-                    if (can_loose($diagStr,$opponent) !== false){
-                        $colForNoLose = $x;
-                    }
-		}
-		for ($k = 3 ; $k < 6 ; $k++){
-
-                    //diagonales \
-                    $diagStr="";
-                    for($x=0 , $y=$k; isset($params['board'][$y][$x]); $x++, $y--){
-                        $diagStr.=$params['board'][$y][$x];
-                    }
-                   if(can_win($diagStr,$params['you']) !== false){
-                        echo '{"play":'.$x.'}';
-                        die;
-                    }
-                    if (can_loose($diagStr,$opponent) !== false){
-                        $colForNoLose = $x;
-                    }
-                   
-                }
-
-                //si j'arrive là, je ne gagne pas à ce tour
-                if(isset($colForNoLose)){
-                    echo '{"play":'.$colForNoLose.'}';
-                    die;               
-                }
-
-                //still there? random
-		
-		$colAvailable=array();
-		//dont play on full colomns
-		for($i=0;$i<7;$i++){
-  			if(($params['board'][5][$i] == "+") OR ($params['board'][5][$i] == "_")){
-    				$colAvailable[]=$i;
-  			}
-		}
-		
-		shuffle($colAvailable);
-		echo '{"play":'.$colAvailable[0].'}';
-
-		
-	//echo '{"play":"'.better_col($params['board'],$params['you'],$opponent,0).'"}';
-		break;
-	default:
-		break;
-}