Find an image of Michael Jackson wearing a sailor hat.
Phetch is like a treasure hunt - you must find or help find an image from the Web.
One of the players is the Describer and the others are Seekers. Only the Describer can see the hidden image, and has to help the Seekers find it by giving them descriptions.
If the image is found, the Describer wins 200 points. The first Seeker to find it wins 100 points and becomes the new Describer.
It's a fun Internet game that takes advantage of Human Computation in order to improve search engines.