What are Classic and Duel challenges?

In the Classic challenges you submit your design to compete against nine randomly picked players. The Community votes on the ten designs and create a ranking. The ranking is revealed once all the votes have been registered.

You'll be challenged to two duels every day: one Trendsetter Duel and one Stylist Duel. They're played exactly the same way as the Classic Challenges, except you compete against one single opponent instead of nine. Additionally, you'll be able to see your opponent's design before your start your design (or check it at any point while designing). Because it would be unfair, Duels cannot be redesigned.