Per the Yan Bo Diao Sou Ge — one chart per hour, eight deities and eight gates.
奇门遁甲 casts a “board” from the current moment, arranging the stars, gates and spirits across nine palaces, and you look at which combination lands in the palace you care about. It’s especially suited to questions of timing, direction and strategy — “when to move / which way / how to arrange things.” Don’t worry about the nine palaces, stars, gates and spirits: a plain-language reading follows.