Updated code

PgnParser.php

@@ -27,8 +27,9 @@ class PgnParser
         $this->pgnContent = $content;
     }
 
-    public function cleanPgn($c)
+    private function cleanPgn()
     {
+        $c = $this->pgnContent;
         $c = preg_replace("/\\$[0-9]+/s", "", $c);
         $c = str_replace("({", "( {", $c);
         $c = preg_replace("/{([^\[]*?)\[([^}]?)}/s", '{$1-SB-$2}', $c);
@@ -36,7 +37,7 @@ class PgnParser
         $c = preg_replace("/\t/s", "", $c);
         $c = preg_replace("/\]\s+\[/s", "]\n[", $c);
         $c = str_replace(" [", "[", $c);
-        $c = preg_replace("/([^\]])(\n+)\[([a-z])/si", "$1\n\n[$3", $c);
+        $c = preg_replace("/([^\]])(\n+)\[/si", "$1\n\n[", $c);
         $c = preg_replace("/\n{3,}/s", "\n\n", $c);
         $c = str_replace("-SB-", "[", $c);
         $c = str_replace("0-0-0", "O-O-O", $c);

autoload.php

@@ -7,6 +7,7 @@ spl_autoload_register(
         static $classes = null;
         if ($classes === null) {
             $classes = array(
+                'chess_json' => '/CHESS_JSON.php',
                 'board0x88config' => '/Board0x88Config.php',
                 'dgtgameparser' => '/DGTGameParser.php',
                 'fenparser0x88' => '/FenParser0x88.php',