I had used older versions of Goban years ago, so I bought the app for $9.99. That was a big mistake! The free version (3.2) is still available for downloading, and works better than the purchased version. For example, the free version has help that works; the purchased version just goes to a web site that has absolutely NO information. Worse, the purchased version is completely useless for game analysis. In the free version, you can add variations and marks, which is great; in the purchased version, those items are permanently disabled. The only thing that the purchased version has which is not in the free version is another computer go engine, named “Pachi” (the old version only has GnuGo). Pachi is stronger than GnuGo, so it can be more interesting for stronger players. However, Pachi is _not_ included in the purchase, because it is open source. You need to download and install a (free) extension package to use it. This was a very disappointing purchase. Why did the developers not even bother to put the help files from the old version on their web site? Save your money and get the download the old, free version instead - it works better!

Don't pay any attention to the old reviews. Goban and gnugo work fine now! The only thing not really obvious is that you have to undo back to YOUR move, of course.All in all a good Go experience.Note to Apple - the search for Go Game really doesn't work well.

Just deleted it, GARBAGE. Extensions do not work, package can be downloaded if you right click in their webside but app does not accept them. Can not play against computer, only against yourself!!!

While the interface is beautiful, the (free) extensions don’t work and don’t enable the promised features rendering the app pretty but not useful.