This is a Gobang game, some people call it RenJu, FIR(Five in a Row). It''s a kind of traditional Black White chess which was invented in ancient times of China, developed in Japan and quickly spread in Europe. The game is simple to learn but difficult to master and this made it great popular around the world.Because Pocket GoBang is a Java program,you need to install the java plugs java.sis and cawt.jar on your communicator which are designed specially to supporting all java software running on nokia 9210/9290.(both provided and authorized by nokia wesite and organization).Plugs's url information seen in readme.html covered in PocketGobang download file.