The individual challenges will usually consist of a savegame, one or more win conditions and a tiebreak.I will choose tasks for win conditions that seem seem "particular" to me (so no "Win the game" challenge) and that are hard to fail definitively (the question only being when to accomplish it) for most of the players. The maps will be usually randomly generated, but edited (not excluding surprises to screw your game plans).I see the challenge also as a "test area" for players of lower difficulties that can concentrate on maximizing one specific aspect of the game, and possibly learning from looking at other player's strategies after the challenge is finished. I believe that Prince difficulty is appropriate for this, but am ready to be convinced to lower the difficulty if that would open the challenge to a considerable amount of new players. I am aware that the game seems very easy for anyone playing on high difficulty, but you are playing more against the clock than against the AI. A deity player will most likely be better than a warlord player on the challenges, but I hope that people don't participate only to win, but to have fun.For the settings, I will use smaller maps (< Standard) usually and give tasks that don't require to play into the very late game (again, usually) to make the challenge doable on more or less any machine and somewhat limited in time.