you can feel the tension in the air, can't you?

Frenopolis is like Chess, except the board has 4 colors instead of 2, and only 10 squares instead of 64. All of the movements between those 4 squares are abstracted (ex Pawn: Moves 1 square forward = P) and distributed onto cards. There are tables that serialize every single movement between every color. These movements are mixed and matched to create Frenopolis cards.

A chess example of this:
Pawn: Moves 1 square forward = P
Knight: Moves 2 then 1 perpendicular = N

Pawn-Knight = P + N
This meta piece “Pawn-Knight” is able to do both the actions of a Pawn and a Knight, in a single piece. Sort of like how a Queen is a combination of a Rook and Bishop. The movements are abstracted and combined to form a new piece.

Frenopolis cards are analogous to meta chess pieces on 4-color 10-square board. Once you learn the basic movements, it is easy to understand any card.