Strongest – Igowin HD Review
This has the strongest GO engine of any on the market. I don't understand the negative reviews. If you are choosing a game for the strength of the opposition, this is it (if you want a great UI and lots of historical games, go with SmartGo Kifu).
Some shortcomings: it's clumsy to save and restore. And it does not allow multiple people to use the software and have separate ratings.
Review by Quixotic9 on
Igowin HD.