Multiplayer WebChess
This is an advanced WebChess game where two people can meet up online and play vs. each other. It has many advanced features like Pawn Promotion, Move Validations, Tells if King is checked, and much much more. We are working on it days long. It requires MySql and PHP. Its free to use under the GPL liecence. Download it. We are currently featuring version 1.02b (see a sneek peek at http://www.vaider.com/chess)