I just wanted to check out some articles on Xian Guo, but I found that the system was under maintenance. The announcement page offered a fun Flash game - "Catch the Cats". [The user experience and stickiness are indeed worth learning from.] It has some resemblance to Go (Weiqi). Pretty good, so I'd like to recommend it.
If you manage to catch them, please leave your name! Haha.