A strong player won't cheat because it would ruin the satisfaction they get from playing.
Regarding the topic:
Let's say a loser appears and says, "I attacked, but then my phone rang. It was noisy in the office, so I went out into the hallway. At that time, Vigo was very interested in what my situation was. Curiosity isn't a vice. He looked, deleted the saves, closed the second copy of Heroes, and when he returned, he continued playing and didn't even notice what had happened."
What should be done then? :D