Unbeatable Tic-Tac-Toe

Warning: DOMDocument::load(): Couldn't find end of Start Tag ip line 18689 in /usr/local/www/apache24/data/tictactoe/games.xml, line: 18689 in /usr/local/www/apache24/data/tictactoe/index.php on line 54

Warning: DOMDocument::load(): Premature end of data in tag game line 18687 in /usr/local/www/apache24/data/tictactoe/games.xml, line: 18689 in /usr/local/www/apache24/data/tictactoe/index.php on line 54