The commented game is presented with two windows placed one below the other ; each window contains a diagram; the first diagram (top) used to visualize the situation of the game before changes occurring in the second diagram (bottom).
If your screen resolution does not allow you to view both diagrams you have to go full screen (press F11 to put you in full screen, press again F11 to exit full screen).
Arrows on either side of the two dice are used to move forward and backward in the game.
Are you not lost in translation ? We are looking for voluntary contributors for an english translation of the reasoned dictionary of trictrac (or a part of it) ; you can send a mail to trictrac.org.