So I have an AI sieging a neutral city for most likely 100+ turns... Despite that I managed to finish the game (Mars colony) but now I would like to play a bit more to get to the end of research, see all the units, what happens when pollution kicks in and to achieve world domination (obviously). 

I tried the beta which fixes the defenders to start dropping HP but that does nothing as there are reinforcements for the defenders. And the AI still does nothing even though the defenders are 5 times stronger on balance of power (they should launch a sortie, right?). 

So I am looking for ways to remove this siege from my map. 

• Did anyone messed with savegame files? Is it to soon to ask for save editor? 
• are there some in-game console commands?
• any other ideas how to fix this? 

I also had an AI sieging a neutral city for far too many turns and don't know wether it was stuck or just maintaining the siege. However, it is apparantly not possible to attack an army that is participating in a siege or am I wrong? 

Not as far as I know...Which leaves the defender the only one who can do something about it but the AI really does not want to counterattack... 

In my opinion, it should be possible to attack a sieging army from outside for a nice relation boost with the city owner... One can always hope for a nice patch...