Might as well do this now, while the img tags are still working. This game is called internet picture scavenging. You just have to find pictures with ascending numbers on. So I start with number 1. The next picture should have 2 (or two) in it. And so on. The number has to be in the pic, not just in the title or address. They have to be available on line ie no attachments, and no uploading your own pic (unless it's really funny). Is that enough rules? It's easy at first, but gets harder the higher you go. They don't have to be tennis pics.
Don't want to come across as a spoilsport or anything, but I did say you weren't supposed to use attachments. The whole idea of the game is the pics are from webpages, that's why it's called Online Picture Scavenging (and not, as I said earlier, internet picture scavenging).