In later challenge levels, to fake increasing difficulty, the game just fixes games so that the opponent gets better deals and wins more often. I know this is true because this game doesn't require a lot of skill. Once you know the rules and how to play the best card it just becomes the luck of the deal. If the opponent keeps consistently winning with high scores, winning on the 2nd or 3rd play, something is wrong. It is obvious the cards are being stacked against you. I lost all interest in it.