Tips and tricks for playing Heroes 3.

This cheating method is easily detectable.

It's very difficult to verify whether the opponent can see the number of neutral creatures and their loyalty. This would give them some advantage, but not a decisive one.
But on the other hand, online play is based on trust... Because nothing prevents the map creator from opening the map in the editor!
Play fairly - that's the only way to learn how to play well!

Added after 1 minute

By the way, I think it's better to discuss this issue not in this thread, but, for example, to create a new thread in the online tournaments section, so that more players will see this thread and, consequently, start thinking about this problem.

It's not a problem at all... Just another bug/cheat...