The Drengin built Starbase Tomomaru 1 right between me and the Altarians. They knew exactly where to go from the beginning and immediatly sent a constructor there.
They also have another hidden starbase right beside it, but we can see the influence.
I have yet to discover the territory of the Drengin at this point, but they are south-south-east of this position, in the next cluster group, following the empty space.
You can also see that the Planet Akarumei II is not visible for now, yet, the Altarian LS M9-2 is aiming directly for there, instead of colonizing the visible Ada III, wich happen to be less interesting (higher class but no bonus). That's no luck.
You can also look at the general spreading of the Altarian colonies. They quickly colonized the planets bordering my territory early in the game, without even having sent an explorer ship there. There's just no way they could build an explorer, explore enough to reveal the fog of war and aim colony ships over there while still colonizing the territory south of them. They immediatly knew where to go.
The second involves the Altarian colony Akarumei II. It's a follow up of the same 1st game, after the ALtarian colonized it, in case the first one gets stuck. There was an empty planet, visible from the moment the Altarians sent their colony ship, but they picked Akarumei II first because it was the best planet available in this sector, reserving Ada III for their current LS M9-4 colony ship.
I don't consider 'Genius' to be a very high difficulty, my main problem has been this AI behavior, the stuck game issue that leaves me unable to complete a game, and the AI weird behavior with its military fleets.
One particular thing of note: I set the Drengin and the Yor to be Allied at the beginning, and I allied myself with the Altarians.
ticket ID #ERF-569-22130