So we have all played this game the rules are the same. The board is however different.
This version uses the marks it leaves on a sub as the 2 sets of parallel lines for the board, the Os and Xs have a small tool to make those shapes. The X uses the rubber band to directly leave a mark while the O has a plastic piece in the middle to make a good, clear circle.
In this guide a piece of rigid foam board has been used as that shows the marks left very clearly.
A willing sub would be great to help take some better photos.
Marks take time to appear on skin so don't be in a rush. take your time and enjoy yourself.
Mark out the board.
Take the large frame and place it on a sensitive part of a sub. Avoid the head, spine lower back and stomach areas.
Now snap each the bands onto the sub. Keep the frame in the same place. Each band may have to be snapped several times to get clear lines. Don't be afraid to really go for it with this stage.
In time the marks will appear on the sub roughly marking out a pair of parallel lines.
Using the X and O frames take turns marking out Os and Xs. Just like a regular game of Tic Tac Toe.
It may take several flicks to make the O and X appear so again, really go for it. The more flicks the clearer the mark.
Keep the frame as still on the skin for a clearer mark.