HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

As a treatment, the game is prescribed ONLY on the 8XM12 and 6LM10 templates, without the "a". There is plenty of it there.

Variants with "a" do not differ in the number of one-sided connections from the original.

The probability of one-sided connections appearing is influenced by the number of zones and the number of connections between them, especially ring-shaped connections, which are difficult for the generator to lay out on land.