This game is a fun way to enjoy Sudoku with a friend! First, put in the "starter" numbers from one of the 100 cards using the green disks. Now agree how many one minute turns you will both take and who will start - then off you go. It's a nail biting race to get as many correct numbers in YOUR colour as possible, during the agreed number of turns. Score for every correct number, but beware - wrong numbers are subtracted from your total. The red filter allows for extra clues and lets better players take on less practiced friends. In Carol's own words - "I am a Sudoku addict. It seems that Sudoku addicts are male, female, young and old. We are all hooked. This game is the next stage of the Sudoku craze - it allows players of different levels to compete fairly against each other. I love it - it's perfect for all the family and fantastic value for the money" Carol Vorderman