Time Vectors is a Tic-tac-toe style game, but it is a four-dimensional game of four-in-a-row. The board is a 4x4x4x4 matrix on four vertical levels.The game board is constructed of a nice hardwood base and supports, and the playing surfaces are printed clear acrylic boards.Some have described Time Vectors as 'Tic-tac-toe on steroids.' So far in fifteen years of private play, no algorithm has evolved for producing a sure win or tie game for the first player, as happens with most Tic-tac-toe style games.Time Vectors can be seen at http://www.timevectors.com or http://www.jdbgames.com. The rules are online for perusal or downloading.Online Play Richard's PBeM server - BoardGameGeek