It isn't open source, but you can still play it if you have Flash installed: http://www.kongregate.com/games/thegrandestine/chess-evolved-online http://www.kong

It isn't open source, but you can still play it if you have Flash installed: http://www.kongregate.com/games/thegrandestine/chess-evolved-online http://www.kongregate.com/games/thegrandestine/chess-evolved... Imagine chess but with 100+ different pieces and an element of collecting/upgrading pieces.