> stamping out cheating completely would require extraordinary measures—such as “playing naked in a locked room” to make sure no one was carrying any secret buzzers or other devices.
Could they play inside of a faraday cage?
Chess computers don't require the internet.
In theory you could build a computer that you interact with using your toes and provides you with sensory feedback.
Add to this generate a ton of RF noise right there inside it, across whole spectrum