Although I'm new here, I've been thinking about making maps. What do you think about using a Nine Men's Morris board as a map.
Every intersection is a country, every mill is a continent. Of course with each continent consisting of only 3 countries the bonus for each one should be at most 2. The only drawback is that there are only 24 countries, I don't know if this is enough. Is there any rule of thumb how many countries a map should at least have?