I always wanted to try it out, but I literally lost among all the different versions I found. Did you ever try it and have a favourite version?
Here some links with the best versions I found online, starting from my favourite one:
1) https://www.cyvasse.io/
You can play this version of the game online, with computer or with another opponent.
2) https://gameofcyvasse.com/
Just nice alternative rules and printable cool units.
3) https://cyvasse-online.com/rule_sets/mikelepage
Another good version of the rules.
4) https://www.thingiverse.com/thing:92172
Best printed version of the game I've ever seen, you can find another version of the rules in this link.
There are even some apps for Android devices, but I really didn't like them for many reasons (no player vs computer option, strange rules, etc.).