Chess Cheating and Electronics

I have been intrigued by the discussion about cheating in chess. Many of my electronic designs have been about simple, secret communication. This design (shown) communicates through heat. Other designs have communicated through pitch, electric field, electric shock, light, motion -- and so on. OBSERVATION: I think those people are correct, who think that cheating is unstoppable. But interesting that it is detected best of all by standing back and looking at the big picture.