[ He raises his eyebrows again; somehow that didn't occur to him. ]

Actually, yeah. We could. I've got a, uh... something to carve with if there's anything around to carve. If not we can use something else instead of normal pieces... coins, maybe, whatever'd be easy to remember. There's...

[ He has to count on his fingers to recall all the pieces. ]

... Six different kinds of pieces, sixteen altogether. We could figure out something.