Hi HN, I played this game a lot in school over here in Ukraine and was surprised that there is almost no coverage [1] of it in English. So, I built this tiny website where one can read the rules and play the game online. There is also an optional game mode that is impossible IRL on paper (with the "fog of war").

The game is usually known as "virus wars", but I didn't feel like registering a domain name with the word "virus" in it, so Paper Tactics it is:)

[1] https://www.iggamecenter.com/en/rules/viruswars is the only English source I know, there is also a Wikipedia article in German: https://de.wikipedia.org/wiki/Kampf_der_Viren