Is Heroes 3 a sport, like chess? How does the planning differ?

I did give a specific answer. In our time, absolutely anyone has the opportunity to obtain something that, with clever use, can provide a guaranteed advantage over their opponent. And how this can be used is a wide-open space for human imagination.

You are living in an illusion. I asked what the current rules are in chess, combined with how they can be broken.
"describe an example of how to perform an action in chess that is prohibited for both players"
You didn't say a word about the rules ("an action prohibited for both players").