Rules on how to Request or Challenge.

Request
In your title put [R] at the beginning.
Example: [R] I'm open for a duel.

Challenge
In your title put the username (s) of the person or people whom you want to battle with.
Example: [Username] I'm going to beat you.

After that you set the rules you want, kinda like this:
Time limit
Size
Theme
How many votes you want to go up to or whoever has the most votes by this time limit.