What we did?
Invented (well, enhanced the usual Chess :) ) algorithm of an anti-chess game, implemented AI for users can play with the 'computer'. Created all artworks and programmed the game with the Java language,
The result
Addictive anti-chess game, pretty versatile. We are proud of it because we play chess and working on algorithm, reading about game history and attempts to build the chess-playing machines gave us huge pleasure.