I'm looking for a map called SuperDuel. I played it in the city of Saint Petersburg, on Vasilyevsky Island.
It's divided diagonally into two parts by mountains, with one castle on each side. There are no additional buildings or creatures, and there's no passage on the ground.
Underground, there are two similar areas without castles, but with a passage and a Dragon Guild. If I remember correctly, the creatures are level 8. If you know where I can find it (or have heard of it), please let me know. Thank you.