In order to receive extra credit, you must create a new unique warrior. This warrior may be based on an existing warrior, but must have been modified by you in a non trivial way. (Non-trivial modifications will be judged by the instructor.)
To receive credit, submit a well documented hard copy of your warrior, along with a narrative discussing your warrior's strategy to your instructor. Your narrative should include references to any starting code and a discussion of your modifications.
If you can not physically be present at a competition, you still may submit your warrior to compete. You must be on the official competition roster to receive credit.