AI fail: It thinks it can win and attacks, but then decides it can't go under the fortresses, so sits at edge of combat. I wait. Forever. So I have to send out my ships to die. The AI still does not attack. Since there's no timeout or even any way to concede (I shouldn't lose, but would concede just to continue the game) the game is effectively stuck. Maybe I'll check this one again when it's had some time for updates.