There is a much more effective solution – play on WT. There, the most obvious ways to cheat are already being addressed (the map is not saved, cheat codes do not work, launching two copies of the game is impossible), and in the future, there will be even more obstacles – the inability to load multiplayer games in single-player mode and hotseat, encryption of save files, logging of game actions on the server, etc.
Are you saying that, having two computers at his disposal, he won't be able to view the map?
Ты будешь жрать мир, или мир будет жрать тебя — в любом случае все о'кей, все идет по плану.