Attack
Attack the way a knight does in chess (two squares in any direction plus 1 square in a perpendicular direction).
You do not need to leave any units behind, but if you abandon a square it will revert to neutral. This also provides great freedom traveling around the board in the attack phase.
The # of attacks allowed is the 2*sqrt(length*width) rounded up.
Fortification
Each player can make fortifications at the end of their turn to any connected territory.
The # of fortifications allowed is the sqrt(sqrt(length*width)) rounded up.
Continents
+1 - Any group of four small squares that form a large square.
Some continets contain only 1, 2 or 3 territories, because squares with a knight on them are not capturable.
Miscellaneous
This board was programmatically generated in python. The board size and other options are selected. Then the placement is done semi-randomly with rules and heuristics. Finaly XML and PNG files are created.