basically applying steganography to game moves? Sort of, except you have to tell your opponents what your algorithm is. Like you can invent a system where an o

basically applying steganography to game moves? Sort of, except you have to tell your opponents what your algorithm is. Like you can invent a system where an opening bid of "one heart" means "I have exactly three aces" (as opposed to the conventional meaning of "I have a reasonably strong hand with hearts as my longest suit"), but you can't keep that meaning secret.