You need to have SL 2 installed (https://www.microsoft.com/silverlight/resources/installationFiles.aspx?v=2.0). And this is using SL Streaming service from silverlight.services.live.com. The game is the about the same as the Go game in previous post which is a Windows application on .Net 3.0. Again, only UI, no AI. But I'm thinking to use some open source code to add AI in the future.