Here is my guide/tip to playing on the solo challenges.

Offense: you only need one play. line up in ace formation and send both tight ends on streak routes. let the tight ends run about 5 yards maybe a little more and send a bullet pass on the inside of their shoulder. this will work EVERYRTIME if done correctly. (you also need a pretty fast tight end if you want the best results)

Defense: You have to play *** defense. if you dont know what this is, this is when you drop everyone into zones pretty much. just come out and audible to man coverage by pressing X on xbox or Square on ps3. Now here is where you have to be decently fast. After you audible to man (you can also just line up in 2 man deep) go to your defensive line you make the outside line backers/defensive ends drop in curl to flats and ONE tackle drop into a hook zone and the other tackle do a qb spy. you can find all of these audibles by highlighting over the players and pressing down on the d pad and you should find all the zone audibles/ qb spy there. you should succeed with this defense against the computer!

if this helped just comment below! If you are having trouble it is better to message me on xbox. My GT is qXxLEONIDASxXp. <---that is spelled Leonidas. Hope i helped you guys!