Igowin Pro!

Bring the ancient strategy game of Go into the 21st century and the palm of your hand with Igowin Pro With the most powerful Go software available for the iPhone or iPod Touch, Igowin Pro will challenge you no matter what your level, and keep you at the top of your game, on small boards or full size. Igowin Pro uses the same Go engine as The Many Faces of Go, the three time world computer Go champion. With Igowin Pro on your iPhone or iPod Touch, youre ready to start playing the 4000 year old game that takes a few minutes to learn, and a lifetime to master.

* Installation on Vista or Win-7 sometimes fails. See the support FAQ for help on installing on Vista. I've been working on this go engine for a long time, and it has appeared in many earlier products: