Ok thanks for the feedback. I will add an option to show the used countries during the game.
How good is the AI? We made a few mathematical games a few years ago and our problem was that the computer used perfect strategy. We had to add an easy mode. Perhaps your AI can have an easy model that does a shallow search to avoid stupid errors.
Yeah even though it says AI mode, it is just based on a simple algorithm, otherwise, players can never win. Just made a small difference between the difficulty.