Unlike most slots where you bet on any number of paylines, Cryptologic’s Sudoku has only two betting options, namely columns (vertical) and rows (horizontal). You can bet between 10¢ and €/$/£20 on each option, so the maximum bet is between 20¢ and €/$/£40. There are several ways to win. You begin with a traditional Sudoko grid of nine squares high and nine squares wide, with nine boxes of nine squares within this. Press spin and random numbers will fill the squares. As with the original game, the object is to fill each column, row and internal 9x9 square with the numbers one to nine. A star symbol is wild, and with half a dozen or more turning up in each spin, that obviously helps. Payouts for correctly filled rows and columns depend on how many you get. Three line wins are the minimum paying combination, which pays twice your bet. Getting all nine rows or columns pays a big 6,000 coins. Should you manage to complete the entire Sudoku game in a single spin, you win the top prize of 8,000. Two bonus features keep up the interest. There is a free spin bonus activated by getting five or more completed 9x9 squares. This wins 15 free spins with all line wins doubled. The spins can be re-triggered and the Sudoku Feature can also be won. This feature is activated when you get seven or more red numbers anywhere on the screen. You then win five re-spins where any additional red numbers are held. At the end of the re-spins you get a prize depending on how many red numbers you have collected. If you want, you can start again with a whole new card. There you are, then. Not as difficult as it may sound, courtesy Cryptologic. Addicts of the original Sudoko know that it can consume a lot of time. With this in mind, we merely say: Sudoku fruit machine players – your days are numbered!