I didn't know if I should write here, but I really want to share with you one thing about sudoku! My friend is the games-writter and he realised that sudoku is as great game that he had to make for more than one person. He wrote a game called "sudoku kinoku". It is a great board game for maximum 4 people. You can competete and have fun playing it. There is a short movie on YT (about 1 minute)https://www.youtube.com/watch?v=lTIedoGSgM8 Could yu tell me what do you think about it? What is your impression and so on?