I sometimes enjoy playing some board games like ticket to ride or settlers of catan on my ipad. In most cases I prefer to play against the AI, because it allows me to pause the game and continue at a later time. However, the AI-players in the games I played are kind of weak and I lose interest after playing a couple of times.
Now I would like to buy a new game but with a competitive AI. I prefer games for 3-4 players with a length of less than 2 hours. Can you recommend something?