My favorite game is go. It's a version of checkers. 
I understand it is very complex. Is it harder than Checkers?
It is. The board is shaped like a star instead of a square and there can be up to 6 players.
At what age did you learn of this game with it having mathematics?
I learned it when I was 6 years old. But I didn't get good at it until later 
Are the four liberties hard to understand?
To me it isn't. Just up, down, right, and left. But it can be complicated to understand when there are more pieces.
Sounds easy enough. How long does a game last? I see they can last long.
It depends on the skill level. Quick games usually take around an hour but the more professional games can take up to half a day or more.
Who is your favorite to engage in this game?