What you think are the possible technologies that were used to create duelingnetwork[dot]com?

Also could you suggest any good online resources/books, for a beginner, in order to make something similar to it yourself?

What you think are the possible technologies that were used to create duelingnetwork[dot]com?

Also could you suggest any good online resources/books, for a beginner, in order to make something similar to it yourself?

It uses flash and most likely a webbased backend (php/asp/jsp + some database are common but any language works) (xml requests is one of the easier ways to have a flash app communicate with a server and for turn based games its more than fast enough), its also possible to use sockets against a more traditional game server but its slightly more difficult to implement.