You will need to register to add photos.
Take a photo of the matches before and after and then use the New Topic button to start a new discussion.
In teh Subject line enter the title for your puzzle
Use the Upload attachment tab, then choose file, then add the file; to locate the photos you took earlier and load them onto teh site.
Finally I suggest you use Place Inline to add the photo into your topic.
Click Submit and your puzzle should be added