.

connectfour.php

@@ -12,7 +12,7 @@ function score($board,$me,$opponent,$colToPlay,$depth){
   
   $newBoard = $board;
   //add cell
-  for($y = 0; $board[$y][$colToPlay] <> " "; $y++){
+  for($y = 0; $board[$y][$colToPlay] <> "+"; $y++){
   }
   $newBoard[$y][$colToPlay] = $me;
   
@@ -22,7 +22,6 @@ function score($board,$me,$opponent,$colToPlay,$depth){
   for($i = 0 ; $i < 4; $i++){
     $searchValue.=$me;
   }
-  
   //horizontaly
   $line="";
   for ($i=0; $i < 7; $i++){
@@ -69,11 +68,12 @@ function score($board,$me,$opponent,$colToPlay,$depth){
     $ix = -$b;
   }
   $line="";
-  
   for ($jx = $ix , $jy = $iy ; ($jx < 7) && ($jy < 6) ; $jx++ , $jy++){
        $line.=$newBoard[$jy][$jx];
 	}
   if(strpos($searchValue,$line) > -1){
+	 echo "|->".htmlentities($line).strpos($searchValue,$line)."|\n"; 
+	 print_r($newBoard);
     return 42;
   }
   
@@ -89,7 +89,7 @@ function score($board,$me,$opponent,$colToPlay,$depth){
    return 0;
   }
   
-  if($depth < 3){
+  if($depth < 5){
    return 0 - better_col($newBoard,$opponent,$me,$depth + 1);
     
   }else{
@@ -101,20 +101,24 @@ function better_col($board,$me,$opponent,$depth){
   $betterScore= -1000;
   $betterCol= -1;
   for( $i = 0; $i < 7; $i++){
-    if($board[5][$i] == " "){
+    if($board[5][$i] == "+"){
       $sc = score($board,$me,$opponent,$i,$depth);
+        if($depth == 0){
+               echo $i." ".$sc."\n"; 
+        }
+
       if( $sc > $betterScore){
 	$betterScore = $sc;
-	$betterCol = $i;
+	$betterCol = $i - $depth;
       }
     }
   }
   
-  return $i;
+  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($params['action']){
@@ -125,7 +129,7 @@ switch($params['action']){
 		//find $opponent
 		for($x = 0; $x < 7 ; $x++){
 		  for($y = 0; $y < 6 ; $y++){
-		    if(($params['board'][$y][$x] <> " " ) && ($params['board'][$y][$x] <> $params['you'] )){
+		    if(($params['board'][$y][$x] <> "+" ) && ($params['board'][$y][$x] <> $params['you'] )){
 		      $opponent= $params['board'][$y][$x];
 		    }
 		  }
@@ -135,6 +139,7 @@ switch($params['action']){
 		}elseif(!isset($opponent)){
 		  $opponent="X";
 		}
+
 	echo '{"play":"'.better_col($params['board'],$params['you'],$opponent,0).'"}';
 		break;
 	default:

tictactoe.php

@@ -19,7 +19,15 @@ if($message['action'] == "init"){
 
 
 function score_case($map,$me,$him,$case,$depth=0){
+  if($depth%2 == 0){
+   $isOpponent = false; 
+  }else{
+   $isOpponent = true;
+  }
+
   //test si la case est gagnante
+
+
   $newMap=$map;
   $newMap[$case] = $me;
   
@@ -33,13 +41,18 @@ function score_case($map,$me,$him,$case,$depth=0){
         OR  (($newMap['0-0']==$newMap['1-1'])&&($newMap['1-1']==$newMap['2-2'])&&($newMap['2-2']!==""))
         OR  (($newMap['0-2']==$newMap['1-1'])&&($newMap['1-1']==$newMap['2-0'])&&($newMap['2-0']!==""))
     ){
+        if($isOpponent){
+		return $depth - 10;
+	}else{
 		return 10 - $depth;
+	}
+
     }else{
       if($depth == 9){
 	return 0;
       }else{
 	$sc=choose_better_cell($newMap,$him,$me,$depth + 1);
-	return -$depth + $sc[1];
+	return -$sc[1];
       }
     }
 }

tictactoe2.php

@@ -0,0 +1,99 @@
+<?php
+header('Access-Control-Allow-Origin: *');
+header('Access-Control-Allow-Methods: GET, POST'); 
+header('Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept');
+/*
+* Tic Tac Toe gnieark's IA V2
+* Gnieark 2016
+* licensed under the Do What the Fuck You Want to Public License http://www.wtfpl.net/
+*/
+
+//get the query
+$message=json_decode(file_get_contents('php://input'), TRUE);
+
+if($message['action'] == "init"){
+  //juste le petit message d'init
+  echo '{"name":"gnieark"}';
+  die;
+}
+
+function score_case($map,$me,$him,$case,$depth=0){
+  if($depth%2 == 0){
+   $isOpponent = false; 
+  }else{
+   $isOpponent = true;
+  }
+
+  //test si la case est gagnante
+
+
+  $newMap=$map;
+  $newMap[$case] = $me;
+  
+    if(
+            (($newMap['0-0']==$newMap['0-1'])&&($newMap['0-1']==$newMap['0-2'])&&($newMap['0-2']!==""))
+        OR  (($newMap['1-0']==$newMap['1-1'])&&($newMap['1-1']==$newMap['1-2'])&&($newMap['1-2']!==""))
+        OR  (($newMap['2-0']==$newMap['2-1'])&&($newMap['2-1']==$newMap['2-2'])&&($newMap['2-2']!==""))
+        OR  (($newMap['0-0']==$newMap['1-0'])&&($newMap['1-0']==$newMap['2-0'])&&($newMap['2-0']!==""))
+        OR  (($newMap['0-1']==$newMap['1-1'])&&($newMap['1-1']==$newMap['2-1'])&&($newMap['2-1']!==""))
+        OR  (($newMap['0-2']==$newMap['1-2'])&&($newMap['1-2']==$newMap['2-2'])&&($newMap['2-2']!==""))
+        OR  (($newMap['0-0']==$newMap['1-1'])&&($newMap['1-1']==$newMap['2-2'])&&($newMap['2-2']!==""))
+        OR  (($newMap['0-2']==$newMap['1-1'])&&($newMap['1-1']==$newMap['2-0'])&&($newMap['2-0']!==""))
+    ){
+        if($isOpponent){
+		return $depth - 10;
+	}else{
+		return 10 - $depth;
+	}
+
+    }else{
+      if($depth == 4){
+	return 0;
+      }else{
+	if($isOpponent){
+ 		$sc=choose_better_cell($newMap,$him,$me,$depth);	
+	}else{
+		$sc=choose_better_cell($newMap,$him,$me,$depth + 1);
+	}
+	return -$sc[1];
+      }
+    }
+}
+function choose_better_cell($map,$me,$him,$depth=0){
+    $betterCell="";
+    $betterScore=-100;
+    static $arrCells= array('0-0','0-1','0-2','1-0','1-1','1-2','2-0','2-1','2-2');
+    foreach($arrCells as $cellKey){
+      if($map[$cellKey] == ""){
+	  $sc = score_case($map, $me,$him,$cellKey,$depth);
+	  if( $sc > $betterScore ){
+	    $betterCell = $cellKey;
+	    $betterScore= $sc;
+	  }
+      }
+    }
+    return array($betterCell,$betterScore);
+}
+
+//count free cases
+$freeCells=0;
+for($x = 0; $x < 3; $x++){
+  for($y = 0; $y < 3; $y++){
+    if($message['board'][$x."-".$y] == ""){
+      $freeCells ++;
+    }elseif($message['board'][$x."-".$y] !== $message['you']){
+      $hisSymbol=$message['board'][$x."-".$y];
+    }
+  }
+}
+
+if(!isset($hisSymbol)){
+  if($message['you'] == 'X'){
+    $hisSymbol='O';
+  }else{
+    $hisSymbol="X";
+  }
+}
+
+
+echo '{"play":"'.choose_better_cell($message['board'],$message['you'], $hisSymbol,9 - $freeCells)[0].'"}';