This game is a challenging expanded version of noughts and crosses.
The original board game consists of twenty-five chunky wooden cubes that fit into a square depression on a circular stand of red plastic. Each cube has O on one side and X on the opposite side, the other four sides being blank.
At the start of the game the cubes fill the tray, all with blank sides upwards. The game then starts with the first player picking up one of the cubes. Note however that only the 16 cubes round the edges can be picked up!
Each move is to pick up a cube, with your sign or a blank on top, and to replace it, showing your sign on top, at one end of the rank or file from which you removed it, pushing the cubes along to fill the gap. You are not allowed simply to replace it in the gap.
The aim, of course, is to be first to form a line of five of your marks, along rank, file or diagonal - though if you push your opponent's pieces to complete a line at the same time, you lose.
