[ Help | Earliest Comments | Latest Comments ][ List All Subjects of Discussion | Create New Subject of Discussion ][ List Earliest Comments Only For Pages | Games | Rated Pages | Rated Games | Subjects of Discussion ]Single Comment Perpetual check. Explanation of perpetual check with an animated diagram.[All Comments] [Add Comment or Rating]Fi Benson wrote on Mon, Dec 16, 2002 10:44 AM UTC:Excellent ★★★★★Crystal clear visual explanation