Don't you guys see it? it's totally easy *Goes into National Treasure mode*
What we have in the picture is a moonfish. The moonfish is on a stamp in Madeira.
http://upload.wikimedia.org/wikipedi...of_Madeira.svg
Now, they've just shown us the basic outline of the field. It's obviously a 4-team game with everyone starting at one end of the cross trying to score something in the middle or grab a game piece from the middle.