"Two Seasons: Winter - Spring 2017-18". Online games.

In the third round, I broke through his defenses, took his main blue base, and got a Utopia (level 5 artifact) there.
My opponent didn't want to give up; he kept running around. I chased him into the third base, but there was no air, so I had to search for him. I found another Utopia there, and while I was doing that, he turned around and ran back, entering my dungeon. Well, I caught up with him and defeated him.

Thanks.