Ubisoft game with good reviews !
Next best is £12.93 @ TheHut..
20,000,000 different grids covering 5 increasing levels of difficulty.
The Kakuro game is also included with over 300 puzzles for a different challenge and a richer experience.
A comprehensive visual tutorial mode: Never played Sudoku or Kakuro before? No problem, the game is made to teach you everything!
Advanced game modes including Solver Mode, where you can enter a grid and get the solution in seconds, and Custom Puzzle, where you can make your own grids.
Plenty of customization options: Adjust your screen just the way you like it with 16 fonts, 14 background skins, 6 grid styles and 11 musical choices.
Two Multiplayer modes: Play with a friend in co-op on the same grid or compete to finish first.