The rules of the game are itself like a virus. Looks like everyone here played a slightly different variant. It mutated wildly across space and time.
After I learned two different rule sets from two different sources, I went on and invented my own version. It became an instant hit in our class for many years to come.
Basically:
1. the map is randomized, with some "islands" randomly drawn, separating the map into "land" and "water"; map size is the whole A5 sheet, which is around 30x40 I think
2. player has 10 moves per turn, moving on "water" cells counts as 2 moves
3. the objective is not to kill everything, but only the enemy starting unit ("the mothership")
4. we even added FFA multiplayer later, where each eliminated opponent nets you +2 moves per turn for the rest of the game, to promote aggression. The diplomacy was intense at times, with "vassal states" and coalitions formed against stronger players.
We did play on an A5 as well! We called the variant "the Lord of the Rings", it was two players that played humans and elves versus one who played orcs. Only humans were allowed to move diagonally, elves could place walls over an empty space, and the orc player had more moves per turn and two bases.
For the problem statements, there is official github repo (see link in the next comment). As for my zip archives, you basically unzip them all somewhere, point the webserver to it and you are all set (+optionally basic Apache+mod_php setup or equivalent to serve user profiles and solutions).
Shameless plug: I have a weird hobby of running an unofficial mirror of the scoreboard [1]
[1] https://zibada.guru/finals/