presuming that the cheater communicates with the system through some form of physical pressure, they could probably use a modified Morse code re-optimised for t

presuming that the cheater communicates with the system through some form of physical pressure, they could probably use a modified Morse code re-optimised for the frequency of letters in chess notation. according to wikipedia[1] this already exists and was developed for telegraph and radio transmission of chess games, although I have no idea how well optimised it is [1] - https://en.wikipedia.org/wiki/Chess_notation https://en.wikipedia.org/wiki/Chess_notation