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

Are chess games protected?

Well, I haven't played chess for about 20 years, so I'm not up to date on the situation. To understand what we're talking about, describe an example of how you can perform an action in chess that is forbidden to both opponents, and at the same time have a good chance of not being caught? (Violate the "fair play rule," if it exists there now).