It is done.

pauloaguia: Yeah, Assimilation is a good name.

pauloaguia: Looks like I misinterpreted the sentence "Player take turns to move any one of their pieces to any square up to two steps away, including diagonally." I don't like what a rules page does not contain screenshots or diagrams, because there are more ways to understand the phrase "two steps away".
However, I can add this rule to the current implementation of Ataxx here.