Go is considered by some to be the ultimate martial art. It is a microcosm for battle field tactic.
It might seem inappropriate to compare go to martial art, because ones physical safety is not at stake in a board game. But I definitely feel many parallels: I can recognize moving off the line, keeping ones center, atemi, taking the center of you opponent, entering etcetera in go. The principles from "The art of war" by Sun Tzu apply very much to go (as I expect them to apply to martial arts).