Have you ever played chess? Surely! In this game, this fact would be a plus-point. There're no kings, queens or so - just knights. One Knight for every one of the two parties. You can choose wether your opponent is the CPU or a human one.
But you also need to know what the game is about: Every Party has only one knight, you can move your night like in chess (so: like a L - mirrored, rotated...). If you move your knight, the field, there the knight stoods before, will be removed. And that's the fact which may break your mind. The final-aim is to capture the opponents knight or you let him be "unmoveable" (no position for him to go to - following the rules!).
A bad thing is the AI of the opponent, it's not adjustable, but a ambitionated logical-games-freak may have fun with this. Reminding on the human opponent, you can also play against a "variable" intelligence.