This is a very nice implementation of a great board game. Occasionally, when playing solo against AI opponents, one of the AIs will pause for a while while considering its move. And sometimes, it will just pause forever, and that particular game is just lost, theres no way to jump start it. Thankfully, games of Ra are so fast that its not really the biggest deal, you just start over.
Buttthead about Reiner Knizia's Ra